Articles | Volume 33, issue 4
https://doi.org/10.5194/ejm-33-401-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-33-401-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Jul 2021
Research article |
| 21 Jul 2021
| 21 Jul 2021
Geochemistry and paleogeographic implications of Permo-Triassic metasedimentary cover from the Tauern Window (Eastern Alps)
Gerhard Franz
CORRESPONDING AUTHOR
Technische Universität Berlin, Chair of Applied Geochemistry, 10587 Berlin, Germany
Martin Kutzschbach
Technische Universität Berlin, Chair of Applied Geochemistry, 10587 Berlin, Germany
Eleanor J. Berryman
CanmetMINING, Natural Resources Canada, Ottawa, K1A 0G1, Ontario,
Canada
Anette Meixner
Faculty of Geosciences & MARUM – Center for Marine Environmental
Sciences, University of Bremen, 28359 Bremen, Germany
Anselm Loges
Technische Universität Berlin, Chair of Applied Geochemistry, 10587 Berlin, Germany
Freie Universität Berlin, Chair of Mineralogy, 12249 Berlin, Germany
Dina Schultze
Technische Universität Berlin, Chair of Applied Geochemistry, 10587 Berlin, Germany
Freie Universität Berlin, Chair of Mineralogy, 12249 Berlin, Germany
Related authors
Gerhard Franz, Vladimir Khomenko, Peter Lyckberg, Vsevolod Chournousenko, and Ulrich Struck
Biogeosciences, 21, 4119–4131, https://doi.org/10.5194/bg-21-4119-2024, https://doi.org/10.5194/bg-21-4119-2024, 2024
Short summary
Short summary
The Volyn biota (Ukraine), previously assumed to be an extreme case of natural abiotic synthesis of organic matter, is more likely a diverse assemblage of fossils from the deep biosphere. Although contamination by modern organisms cannot completely be ruled out, it is unlikely, considering all aspects, i.e., their mode of occurrence in the deep biosphere, their fossilization and mature state of organic matter, their isotope signature, and their large morphological diversity.
Gerhard Franz, Vladimir Khomenko, Peter Lyckberg, Vsevolod Chournousenko, Ulrich Struck, Ulrich Gernert, and Jörg Nissen
Biogeosciences, 20, 1901–1924, https://doi.org/10.5194/bg-20-1901-2023, https://doi.org/10.5194/bg-20-1901-2023, 2023
Short summary
Short summary
This research describes the occurrence of Precambrian fossils, with exceptionally well preserved morphology in 3D. These microfossils reach a size of millimeters (possibly up to centimeters) and thus indicate the presence of multicellular eukaryotes. Many of them are filamentous, but other types were also found. These fossils lived in a depth of several hundred meters and thus provide good evidence of a continental the deep biosphere, from a time generally considered as the
boring billion.
Gerhard Franz, Peter Lyckberg, Vladimir Khomenko, Vsevolod Chournousenko, Hans-Martin Schulz, Nicolaj Mahlstedt, Richard Wirth, Johannes Glodny, Ulrich Gernert, and Jörg Nissen
Biogeosciences, 19, 1795–1811, https://doi.org/10.5194/bg-19-1795-2022, https://doi.org/10.5194/bg-19-1795-2022, 2022
Short summary
Short summary
In pegmatites from Ukraine Precambrian fossils between 1.5 Ga and 1.76 Ga were preserved in cavities connected to the surface in a geyser system. The fossilization process is silicification of the outermost rim of the fossils, stabilizing the remaining part of the organisms. The variety of organisms points to an ecosystem of several microorganisms which was active in the continental environment, and igneous rocks such as the pegmatites seem to be an ideal habitat for the deep biosphere.
Gerhard Franz, Masafumi Sudo, and Vladimir Khomenko
Eur. J. Mineral., 34, 7–18, https://doi.org/10.5194/ejm-34-7-2022, https://doi.org/10.5194/ejm-34-7-2022, 2022
Short summary
Short summary
The age of formation of buddingtonite, ammonium-bearing feldspar, can be dated with the Ar–Ar method; however, it may often give only minimum ages due to strong resetting. In the studied example it gives a Precambrian minimum age of fossils, associated with this occurrence, and the age of the accompanying mineral muscovite indicates an age near 1.5 Ga. We encourage more dating attempts of buddingtonite, which will give valuable information of diagenetic or hydrothermal events.
Leonid Shumlyanskyy, Gerhard Franz, Sarah Glynn, Oleksandr Mytrokhyn, Dmytro Voznyak, and Olena Bilan
Eur. J. Mineral., 33, 703–716, https://doi.org/10.5194/ejm-33-703-2021, https://doi.org/10.5194/ejm-33-703-2021, 2021
Short summary
Short summary
In the paper we discuss the origin of large chamber pegmatite bodies which contain giant gem-quality crystals of black quartz (morion), beryl, and topaz. We conclude that these pegmatites develop under the influence of later intrusions of mafic rocks that cause reheating of the partly crystallized granite massifs and that they supply a large amount of fluids that facilitate the
inflationof pegmatite chambers and crystallization of giant crystals of various minerals.
Gerhard Franz, Vladimir Khomenko, Peter Lyckberg, Vsevolod Chournousenko, and Ulrich Struck
Biogeosciences, 21, 4119–4131, https://doi.org/10.5194/bg-21-4119-2024, https://doi.org/10.5194/bg-21-4119-2024, 2024
Short summary
Short summary
The Volyn biota (Ukraine), previously assumed to be an extreme case of natural abiotic synthesis of organic matter, is more likely a diverse assemblage of fossils from the deep biosphere. Although contamination by modern organisms cannot completely be ruled out, it is unlikely, considering all aspects, i.e., their mode of occurrence in the deep biosphere, their fossilization and mature state of organic matter, their isotope signature, and their large morphological diversity.
Susann Henkel, Bo Liu, Michael Staubwasser, Simone A. Kasemann, Anette Meixner, David Aromokeye, Michael W. Friedrich, and Sabine Kasten
EGUsphere, https://doi.org/10.5194/egusphere-2024-1942, https://doi.org/10.5194/egusphere-2024-1942, 2024
Short summary
Short summary
We intend to unravel iron (Fe) reduction pathways in high depositional methanic sediments because pools of Fe minerals could stimulate methane oxidation, but also generation. Our data from the North Sea indicate that Fe release takes place mechanistically different to Fe reduction in shallow sediments that typically fractionates Fe isotopes. We conclude that fermentation of organic matter involving interspecies electron transfer, partly through conductive Fe oxides, could play an important role.
Dirk Spengler, Adam Włodek, Xin Zhong, Anselm Loges, and Simon J. Cuthbert
Eur. J. Mineral., 35, 1125–1147, https://doi.org/10.5194/ejm-35-1125-2023, https://doi.org/10.5194/ejm-35-1125-2023, 2023
Short summary
Short summary
Rock lenses from the diamond stability field (>120 km depth) within ordinary gneiss are enigmatic. Even more when these lenses form an alternating exposure pattern with ordinary lenses. We studied 10 lenses from W Norway and found that many of them have a hidden history. Tiny needles of quartz enclosed in old pyroxene cores are evidence for a rock origin at great depth. These needles survived the rocks' passage to the surface that variably obscured the mineral chemistry – the rocks' memory.
Gerhard Franz, Vladimir Khomenko, Peter Lyckberg, Vsevolod Chournousenko, Ulrich Struck, Ulrich Gernert, and Jörg Nissen
Biogeosciences, 20, 1901–1924, https://doi.org/10.5194/bg-20-1901-2023, https://doi.org/10.5194/bg-20-1901-2023, 2023
Short summary
Short summary
This research describes the occurrence of Precambrian fossils, with exceptionally well preserved morphology in 3D. These microfossils reach a size of millimeters (possibly up to centimeters) and thus indicate the presence of multicellular eukaryotes. Many of them are filamentous, but other types were also found. These fossils lived in a depth of several hundred meters and thus provide good evidence of a continental the deep biosphere, from a time generally considered as the
boring billion.
Anselm Loges, Gudrun Scholz, Nader de Sousa Amadeu, Jingjing Shao, Dina Schultze, Jeremy Fuller, Beate Paulus, Franziska Emmerling, Thomas Braun, and Timm John
Eur. J. Mineral., 34, 507–521, https://doi.org/10.5194/ejm-34-507-2022, https://doi.org/10.5194/ejm-34-507-2022, 2022
Short summary
Short summary
We investigated the effect that fluoride and protons have on each other as structural neighbors in the mineral topaz. This was done using spectroscopic methods, which measure the interaction of electromagnetic radiation with matter. The forces between atoms distort the spectroscopic signals, and this distortion can thus be used to understand the corresponding forces and their effect on the physical properties of the mineral.
Gerhard Franz, Peter Lyckberg, Vladimir Khomenko, Vsevolod Chournousenko, Hans-Martin Schulz, Nicolaj Mahlstedt, Richard Wirth, Johannes Glodny, Ulrich Gernert, and Jörg Nissen
Biogeosciences, 19, 1795–1811, https://doi.org/10.5194/bg-19-1795-2022, https://doi.org/10.5194/bg-19-1795-2022, 2022
Short summary
Short summary
In pegmatites from Ukraine Precambrian fossils between 1.5 Ga and 1.76 Ga were preserved in cavities connected to the surface in a geyser system. The fossilization process is silicification of the outermost rim of the fossils, stabilizing the remaining part of the organisms. The variety of organisms points to an ecosystem of several microorganisms which was active in the continental environment, and igneous rocks such as the pegmatites seem to be an ideal habitat for the deep biosphere.
Gerhard Franz, Masafumi Sudo, and Vladimir Khomenko
Eur. J. Mineral., 34, 7–18, https://doi.org/10.5194/ejm-34-7-2022, https://doi.org/10.5194/ejm-34-7-2022, 2022
Short summary
Short summary
The age of formation of buddingtonite, ammonium-bearing feldspar, can be dated with the Ar–Ar method; however, it may often give only minimum ages due to strong resetting. In the studied example it gives a Precambrian minimum age of fossils, associated with this occurrence, and the age of the accompanying mineral muscovite indicates an age near 1.5 Ga. We encourage more dating attempts of buddingtonite, which will give valuable information of diagenetic or hydrothermal events.
Leonid Shumlyanskyy, Gerhard Franz, Sarah Glynn, Oleksandr Mytrokhyn, Dmytro Voznyak, and Olena Bilan
Eur. J. Mineral., 33, 703–716, https://doi.org/10.5194/ejm-33-703-2021, https://doi.org/10.5194/ejm-33-703-2021, 2021
Short summary
Short summary
In the paper we discuss the origin of large chamber pegmatite bodies which contain giant gem-quality crystals of black quartz (morion), beryl, and topaz. We conclude that these pegmatites develop under the influence of later intrusions of mafic rocks that cause reheating of the partly crystallized granite massifs and that they supply a large amount of fluids that facilitate the
inflationof pegmatite chambers and crystallization of giant crystals of various minerals.
Related subject area
Metamorphic petrology
The composition of metapelitic biotite, white mica, and chlorite: a review with implications for solid-solution models
Comparison between 2D and 3D microstructures and implications for metamorphic constraints using a chloritoid–garnet-bearing mica schist
Sedimentary protolith and high-P metamorphism of oxidized manganiferous quartzite from the Lanterman Range, northern Victoria Land, Antarctica
Metamorphic evolution of sillimanite gneiss in the high-pressure terrane of the Western Gneiss Region (Norway)
Halogen-bearing metasomatizing melt preserved in high-pressure (HP) eclogites of Pfaffenberg, Bohemian Massif
Île Dumet (Armorican Massif, France) and its glaucophane eclogites: the little sister of Île de Groix
Retrogression of ultrahigh-pressure eclogite, Western Gneiss Region, Norway
Electron backscatter diffraction analysis combined with NanoSIMS U–Pb isotope data reveal intra-grain plastic deformation in zircon and its effects on U–Pb age: examples from Himalayan eclogites, Pakistan
H2O and Cl in deep crustal melts: the message of melt inclusions in metamorphic rocks
Very-low-grade phyllosilicates in the Aravis massif (Haute-Savoie, France) and the di-trioctahedral substitution in chlorite
Partial melting of amphibole–clinozoisite eclogite at the pressure maximum (eclogite type locality, Eastern Alps, Austria)
Petrological study of an eclogite-facies metagranite from the Champtoceaux Complex (La Picherais, Armorican Massif, France)
Corundum-bearing and spinel-bearing symplectites in ultrahigh-pressure eclogites record high-temperature overprint and partial melting during slab exhumation
Some thoughts about eclogites and related rocks
Metamorphic P–T paths of Archean granulite facies metasedimentary lithologies from the eastern Beartooth Mountains of the northern Wyoming Province, Montana, USA: constraints from quartz-in-garnet (QuiG) Raman elastic barometry, geothermobarometry, and thermodynamic modeling
Detrital garnet petrology challenges Paleoproterozoic ultrahigh-pressure metamorphism in western Greenland
Equilibrium and kinetic approaches to understand the occurrence of the uncommon chloritoid + biotite assemblage
Reaction progress of clay minerals and carbonaceous matter in a contact metamorphic aureole (Torres del Paine intrusion, Chile)
Partial melting of zoisite eclogite from the Sanddal area, North-East Greenland Caledonides
Benoît Dubacq and Jacob B. Forshaw
Eur. J. Mineral., 36, 657–685, https://doi.org/10.5194/ejm-36-657-2024, https://doi.org/10.5194/ejm-36-657-2024, 2024
Short summary
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This article reviews the crystal chemistry of chlorite, biotite, and white mica in metamorphosed sediments. These minerals have complex compositions because many atom exchanges may take place in their structure. Such exchanges include easily measured cations but also structurally bound H2O, notoriously hard to measure; iron oxidation; and vacancies. Consequently, formula units are often calculated from incomplete measurements and some exchanges may appear solely due to normalization issues.
Fabiola Caso, Alessandro Petroccia, Sara Nerone, Andrea Maffeis, Alberto Corno, and Michele Zucali
Eur. J. Mineral., 36, 381–395, https://doi.org/10.5194/ejm-36-381-2024, https://doi.org/10.5194/ejm-36-381-2024, 2024
Short summary
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Despite the fact that rock textures depend on the 3D spatial distribution of minerals, our tectono-metamorphic reconstructions are mostly based on a 2D visualisation (i.e. thin sections). For 2D a thin section scan has been combined with chemical X-ray maps, whereas for 3D the X-ray computerised axial microtomography (μCT) has been applied. This study corroborates the reliability of the thin section approach, still emphasising that 3D visualisation can help understand rock textures.
Taehwan Kim, Yoonsup Kim, Simone Tumiati, Daeyeong Kim, Keewook Yi, and Mi Jung Lee
Eur. J. Mineral., 36, 323–343, https://doi.org/10.5194/ejm-36-323-2024, https://doi.org/10.5194/ejm-36-323-2024, 2024
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The manganese-rich siliceous metasediment in the Antarctic Ross orogen most likely originated from Mn-nodule-bearing chert deposited not earlier than ca. 546 Ma. Subduction-related metamorphism resulted in the production of highly oxidized assemblages involving Mn3+ and rare-earth-element-zoned epidote-group mineral and Mn2+-rich garnet. A reduced environment was responsible for the Mn olivine-bearing assemblages from silica-deficient composition.
Ane K. Engvik and Johannes Jakob
Eur. J. Mineral., 36, 345–360, https://doi.org/10.5194/ejm-36-345-2024, https://doi.org/10.5194/ejm-36-345-2024, 2024
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The paper documents sillimanite gneiss in the Western Gneiss Region (WGR) and its presence, composition, formation and metamorphic evolution. Peak metamorphism is modelled to T = 750 °C and P around 0.6 GPa. Subsequent retrogression consumes garnet and shows mineral replacement and melt crystallization involving sillimanite, white mica, K-feldspar and quartz. The petrological evolution is in accordance with the investigated eclogites and HP granulites in the northwestern part of WGR.
Alessia Borghini, Silvio Ferrero, Patrick J. O'Brien, Bernd Wunder, Peter Tollan, Jarosław Majka, Rico Fuchs, and Kerstin Gresky
Eur. J. Mineral., 36, 279–300, https://doi.org/10.5194/ejm-36-279-2024, https://doi.org/10.5194/ejm-36-279-2024, 2024
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We studied primary granitic and halogen-rich melt inclusions trapped in mantle rocks in the Bohemian Massif (Germany) in order to retrieve important information about the nature of the melt and the source rock. The melt was produced by the partial melting of metasediments during the deepest stages of subduction and interacted with the mantle. This work is an excellent example of transfer of crustal material, volatiles in particular, in the mantle during the subduction of the continental crust.
Gaston Godard, David C. Smith, Damien Jaujard, and Sidali Doukkari
Eur. J. Mineral., 36, 99–122, https://doi.org/10.5194/ejm-36-99-2024, https://doi.org/10.5194/ejm-36-99-2024, 2024
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Petrological and mineralogical studies of mica schists, orthogneisses and glaucophane eclogites from Dumet Island (Armorican Massif, NW France) indicate that this occurrence, which has undergone high-pressure metamorphism up to 16 kbar and 620 °C, is similar to that of Groix Island. There are about 10 similar occurrences within the Ibero-Armorican Arc, forming a discontinuous high-pressure belt, but most of them have remained unnoticed due to a high degree of retrogression.
Dirk Spengler, Adam Włodek, Xin Zhong, Anselm Loges, and Simon J. Cuthbert
Eur. J. Mineral., 35, 1125–1147, https://doi.org/10.5194/ejm-35-1125-2023, https://doi.org/10.5194/ejm-35-1125-2023, 2023
Short summary
Short summary
Rock lenses from the diamond stability field (>120 km depth) within ordinary gneiss are enigmatic. Even more when these lenses form an alternating exposure pattern with ordinary lenses. We studied 10 lenses from W Norway and found that many of them have a hidden history. Tiny needles of quartz enclosed in old pyroxene cores are evidence for a rock origin at great depth. These needles survived the rocks' passage to the surface that variably obscured the mineral chemistry – the rocks' memory.
Hafiz U. Rehman, Takanori Kagoshima, Naoto Takahata, Yuji Sano, Fabrice Barou, David Mainprice, and Hiroshi Yamamoto
Eur. J. Mineral., 35, 1079–1090, https://doi.org/10.5194/ejm-35-1079-2023, https://doi.org/10.5194/ejm-35-1079-2023, 2023
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Zircon preserves geologic rock history. Electron backscatter diffraction (EBSD) analysis is useful to visualize deformed domains in zircons. Zircons from the Himalayan high-pressure eclogites were analzyed for EBSD to identify intra-grain plastic deformation. The U–Pb isotope age dating, using Nano-SIMS, showed that plastic deformation likely affects the geochronological records. For geologically meaningful results, it is necessary to identify undisturbed domains in zircon via EBSD.
Silvio Ferrero, Alessia Borghini, Laurent Remusat, Gautier Nicoli, Bernd Wunder, and Roberto Braga
Eur. J. Mineral., 35, 1031–1049, https://doi.org/10.5194/ejm-35-1031-2023, https://doi.org/10.5194/ejm-35-1031-2023, 2023
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Garnet often entraps small droplets of deep melts generated during mountain building processes. Using high-resolution techniques, we studied these droplets in order to provide hard numbers for the quantification of volatile budgets during crustal evolution, show how even melts formed at >1000°C contain water, and clarify how water behaves during metamorphism and melting at the microscale. Moreover, we provide the very first data on chlorine in natural melts from crustal reworking.
Benoît Dubacq, Guillaume Bonnet, Manon Warembourg, and Benoît Baptiste
Eur. J. Mineral., 35, 831–844, https://doi.org/10.5194/ejm-35-831-2023, https://doi.org/10.5194/ejm-35-831-2023, 2023
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Minerals in a vein network from the Aravis limestone (Haute-Savoie, France) include carbonates, quartz, fluorite and phyllosilicates, crystallized at around 7 km depth and 190 °C. The mineralogy has been studied with emphasis on the chlorite types: chamosite (iron-rich), cookeite (lithium-rich) and sudoite. The presence of the three chlorite types sheds light on their phase diagrams, and observed cationic substitutions confirm the need for more systematic measurement of lithium in chlorite.
Simon Schorn, Anna Rogowitz, and Christoph A. Hauzenberger
Eur. J. Mineral., 35, 715–735, https://doi.org/10.5194/ejm-35-715-2023, https://doi.org/10.5194/ejm-35-715-2023, 2023
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We investigate rocks called eclogite, which are related to subduction and the collision of continents. Our samples show evidence of limited melting at high pressure corresponding to about 70 km depth, which may play an important role in the exhumation of these rocks and the differentiation of the crust. However, due to their composition and metamorphic evolution, melt production is limited, suggesting that similar rocks are unlikely to contribute strongly to subduction-related magmatism.
Thomas Gyomlai, Philippe Yamato, and Gaston Godard
Eur. J. Mineral., 35, 589–611, https://doi.org/10.5194/ejm-35-589-2023, https://doi.org/10.5194/ejm-35-589-2023, 2023
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The La Picherais metagranite is a key example of undeformed high-pressure quartzofeldspathic rock from the Armorican Massif. Through petrological observations and thermodynamic modelling, this study determines that the metagranite was pressured above 1.7 GPa and the associated mafic lenses at ~ 2.1 GPa. This metagranite provides an opportunity to study the degree of transformation of quartzofeldspathic rocks at high pressure, which may have a significant impact on the dynamics of subduction.
Pan Tang and Shun Guo
Eur. J. Mineral., 35, 569–588, https://doi.org/10.5194/ejm-35-569-2023, https://doi.org/10.5194/ejm-35-569-2023, 2023
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In this study, unusual corundum- and spinel-bearing symplectites after muscovite were found in ultrahigh-pressure eclogites from the Dabie terrane, China. The results indicate that these symplectites formed by the low-pressure partial melting of muscovite during slab exhumation. We stress that the occurrence of corundum- and spinel-bearing symplectites after muscovite in eclogites provides important implications for fluid and melt actions in exhumed slabs.
Michael Brown
Eur. J. Mineral., 35, 523–547, https://doi.org/10.5194/ejm-35-523-2023, https://doi.org/10.5194/ejm-35-523-2023, 2023
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The past 40 years have been a golden age for eclogite studies, supported by an ever wider range of instrumentation and enhanced computational capabilities, linked with ongoing developments in the determination of the temperatures and pressures of metamorphism and the age of these rocks. These data have been used to investigate the spatiotemporal distribution of metamorphism and secular change but not without controversy in relation to the emergence of plate tectonics on Earth.
Larry Tuttle and Darrell J. Henry
Eur. J. Mineral., 35, 499–522, https://doi.org/10.5194/ejm-35-499-2023, https://doi.org/10.5194/ejm-35-499-2023, 2023
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Quartz inclusions in garnet are used to constrain the metamorphic pressure–temperature history of multiple ~2.8 Ga metasedimentary rocks from Montana, USA. Inclusion studies along with mineral and whole rock chemistry suggests that the rocks of interest experienced a clockwise metamorphic P–T history that included isobaric heating to peak metamorphic temperatures once inclusions were entrapped. These findings place fundamental constraints on the P–T evolution of this important geologic setting.
Jan Schönig, Carsten Benner, Guido Meinhold, Hilmar von Eynatten, and N. Keno Lünsdorf
Eur. J. Mineral., 35, 479–498, https://doi.org/10.5194/ejm-35-479-2023, https://doi.org/10.5194/ejm-35-479-2023, 2023
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When and how modern-style plate tectonics initiated is a matter of debate. Although the earliest unequivocal evidence for ultrahigh-pressure metamorphism is Neoproterozoic, similar processes have been proposed for Paleoproterozoic rocks of western Greenland. We intensely screened the area by studying detrital heavy minerals, garnet chemistry, and mineral inclusion assemblages in garnet. Our results raise considerable doubts on the existence of Paleoproterozoic ultrahigh-pressure rocks.
Sara Nerone, Chiara Groppo, and Franco Rolfo
Eur. J. Mineral., 35, 305–320, https://doi.org/10.5194/ejm-35-305-2023, https://doi.org/10.5194/ejm-35-305-2023, 2023
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The coexistence of chloritoid and biotite in medium-pressure Barrovian terranes is uncommon, with chloritoid usually occurring at lower temperatures than biotite. A petrologic approach using equilibrium thermodynamic modelling points out how metapelites can attain H2O-undersaturated conditions even at medium pressure and amphibolite-facies conditions and consequently can be affected by kinetic barriers, which need to be taken into account.
Annette Süssenberger, Susanne Theodora Schmidt, Florian H. Schmidt, and Manuel F. G. Weinkauf
Eur. J. Mineral., 32, 653–671, https://doi.org/10.5194/ejm-32-653-2020, https://doi.org/10.5194/ejm-32-653-2020, 2020
Wentao Cao, Jane A. Gilotti, and Hans-Joachim Massonne
Eur. J. Mineral., 32, 405–425, https://doi.org/10.5194/ejm-32-405-2020, https://doi.org/10.5194/ejm-32-405-2020, 2020
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Zoisite eclogites from the Sanddal area, North-East Greenland, contain numerous textures, such as cusps and neoblasts, which are interpreted as melt-related textures. Mineral chemistry and thermodynamic modeling demonstrate that they were partially melted through the breakdown of hydrous minerals, phengite, paragonite and zoisite. Pressure–temperature phase diagrams show that the eclogites reached a maximum depth of ∼70 km and were partially melted near that depth and during exhumation.
Cited articles
Aubert, D., Stille, P., and Probst, A.: REE fractionation during granite
weathering and removal by waters and suspended loads: Sr and Nd isotopic
evidence, Geochim. Cosmochim. Acta, 65, 387–406, 2001.
Ague, J. J.: Extreme channelization of fluid and the problem of element
mobility during Barrovian metamorphism, Am. Mineral., 96, 333–352, 2011.
Bao, Z. and Zhao, Z.: Geochemistry of mineralization with exchangeable REY
in the weathering crusts of granitic rocks in South China, Ore Geol. Rev.,
33, 519–535, 2008.
Barnes, J. D., Selverstone, J., and Sharp, Z. D.: Interactions between
serpentinite devolatilization, metasomatism and strike-slip strain
localization during deep-crustal shearing in the eastern Alps, J. Metam.
Geol., 22, 283–300, 2004.
Barrientos, X. and Selverstone, J.: Metamorphosed soils as stratigraphic
indicators in deformed terranes: An example from the Eastern Alps, Geology,
15, 841–844, 1987.
Bhatia, M. R.: Plate tectonics and geochemical composition of sandstones, J.
Geol., 91, 611–627, 1983.
Bebout, G. E. and Graham, C. M.: Cycling of B, Li, and LILE (K, Cs, Rb, Ba,
Sr) into subduction zones: SIMS evidence from micas in high-P/T
metasedimentary rocks, Chem. Geol., 239, 284–304, 2007.
Bebout, G. E. and Nakamura, E.: Record in metamorphic tourmaline of
subduction-zone devolatilization and boron cycling, Geology, 31, 407–410,
2003.
Behrmann, J. H.: Crustal-scale extension in a convergent orogen: The
Sterzing-Steinach mylonite zone in the Eastern Alps, Geodyn. Acta, 2, 63–73,
1988.
Behrmann, J. H. and Frisch, W.: Sinistral ductile shearing associated with
metamorphic decompression in the Tauern window, Eastern Alps, Jb. Geol.
B.-A., 133, 135–146, 1990.
Berryman, E. J., Kutzschbach, M., Trumbull, R. B., Meixner, A., van
Hinsberg, V., Kasemann, S. A., and Franz, G.: Tourmaline as a petrogenetic
indicator in the Pfitsch Formation, western Tauern Window, eastern Alps,
Lithos, 284–285, 138–155, 2017.
Brandner, R., Töchterle, A., Pomela, H., and Reiter, F.: Geological map
of the Brenner-Basistunnel 1 : 50,000, Geol. Surv. Bozen, Italy, 2011.
Brunsmann, A., Franz, G., and Erzinger, J.: REE mobilization during
small-scale high-pressure fluid-rock interaction and zoisite/fluid
partitioning of La to Eu, Geochim. Cosmochim. Acta, 65, 559–570, 2001.
Cassinis, G., Cortesogno, L., Gaggero, L., and Buzzi, L.: Permian to
Triassic geodynamic and magmatic evolution of the Brescian Prealps (eastern
Lombardy, Italy), Boll. Soc. Geol. Ital. (Ital. J. Geosc.) 127, 501–518,
2008.
Cesare, B., Rubatto, D. Hermann, J., and Barzi, L.: Evidence for late
Carboniferous subduction-type magmatism in mafic-ultramafic cumulates of the
SW Tauern window (eastern Alps), Contrib. Miner. Petrol., 142, 449–464,
2002.
Christa, E.: Das Gebiet des Oberen Zemmgrundes in den Zillertaler Alpen, Jb.
Geol. B.-A., 81, 533–635, 1931.
Cortesogno, L., Fiorini, E., Gaggero, L., Molina, M., and Ronchi, A.: New
stratigraphic and petrographic data on the Permian Tione basin (lower Val
Rendena, Trentino, Italy), Atti Tic. Sc. Terra (Serie Spez.), 7, 125–138,
1998.
Day-Stirrat, R. J., Milliken, K. L., Dutton, S. P., Loucks, R. G., Hillier,
S., Aplin, A. C., and Schleicher, A. M.: Open-system chemical behavior in
deep Wilcox Group mudstones, Texas Gulf Coast, USA, Mar. Petrol. Geol., 27,
1804–1818, 2010.
De Capitani, L., Moroni, M., and Rodeghiero, F.: Geological and geochemical
characteristics of Permian tourmalinization at Val Trompia (southern Alps,
northern Italy) and relationship with the Orobictourmalinites, Periodica Mineral., 68, 185–212, 1999.
De Vecchi, G. P. and Baggio, P.: The Penninic zone of the Vizze region in
the western Tauern Window (Italian eastern Alps), Boll. Soc. Geol. Italia,
101, 89–116, 1982.
Elter, F. M., Gaggero, L., Mantovani, F., Pandeli, E., and Costamagna, L.
G.: The Atlas-east Variscan-Elbe shear system and its role in the formation
of the pull-apart late Paleozoic basins, Int. J. Earth Sci., 109, 739–760,
2020.
Fedo, C. M., Nesbitt, H. W., and Young, G. M.: Unraveling the effects of
potassium metasomatism in sedimentary rocks and paleosols, with implications
for paleoweathering conditions and provenance, Geology, 23, 921–924, 1995.
Feijth, J.: Palaeozoic and Mesozoic tectono-metamorphic development and
geochronology of the Orobic chain (southern Alps, Lombardy, Italy), PhD
thesis, Technical University Berlin, 166 pp., 2002.
Finger, F., Frasl, G., Haunschmidt, B., Lettner, H., von Quadt, A.,
Schermaier, A., Schindlmayr, A. O., and Steyrer, H. P.: The Zentralgneise of
the Tauern window (Eastern Alps): insight into an intra-alpine Vasican
batholith, in: Pre-Mesozoic geology in
the Alps, edited by: von Raumer, J. F. and Neubauer, F., Springer, Berlin, Heidelberg, New York, 375–391, 1993.
Foley, N. and Ayuso, R.: REE enrichment in granite-derived regolith deposits
of the Southeastern United States: Prospective source rocks and accumulation
processes, British Columbia Geol. Surv. Paper, 2015-3, 131–138, 2015.
Franz, G., Grundmann, G., and Ackermand, D.: Rock forming beryl from a
regional metamorphic terrain (Tauern Window, Austria): Parageneses and
crystal chemistry, Tschermaks Min. Petr. Mitt. 35, 167–192, 1986.
Franz, G., Berryman, E., Kutzschbach, M., Meixner, A., Kasemann, S.,
Lucassen, F., Loges, A., and Schultze, D.: Whole-rock geochemistry of rock
units from the Pfitscher Joch area, Western Tauern Window, GFZ Data
Services, https://doi.org/10.5880/fidgeo.2021.013, 2021.
Frisch, W.: Tectonics of the western Tauern Window, Mitt. Österr. Geol.
Ges. 71, 65–71, 1980.
Gaboreau, S., Beaufort, D., Viellard, P., Patrier, P., and Bruneton, P.:
Aluminium-phosphate-sulfate minerals associated with Proterozoic
unconformity-type uranium deposits in the east Alligator Rivers uranium
field, Northern Territory, Australia, Can. Mineral., 43, 813–827, 2005.
Gaboreau, S., Cuney, M., Quirt, D., Beaufort, D., Patrier, P., and Mathieu,
R.: Significance of aluminum phosphate-sulfate minerals associated with
unconformity-type deposits: The Athabasca basin, Canada, Am. Mineral., 92,
267–280, 2007.
Galán-Abellán, A. B., Barrenechea, J. F., Benito, M. I., De la
Horra, R., Luque, F. J., Alonso-Azcárate, J., López-Gómez,
A. J., and Lago, M.: Palaeoenvironmental implications of aluminum
phosphate-sulphate minerals in Early–Middle Triassic continental sediments,
SE Iberian Range (Spain), Sed. Geol., 289, 169–181, 2013.
Gleißner, P., Franz, G., and Frei, D.: Contemporaneous opening of the
Alpine Tethys in the Eastern and Western Alps: Constraints from a Late
Jurassic gabbro intrusion age in the Glockner Nappe, Tauern Window, Austria,
Int. J. Earth Sci., accepted, 2021.
Glodny, J., Ring, U., and Kühn, A.: Coeval high-pressure metamorphism,
thrusting, strike-slip, and extensional shearing in the Tauern Window,
Eastern Alps, Tectonics, 27, TC4004, https://doi.org/10.1029/2007TC002193, 2008.
Grew, E. S., Hystad, G., Hazen, R. M., Krivovichev, S. V., and Gorelova, L.
A.: How many boron minerals occur in Earth's upper crust?, Am. Mineral., 102,
1573–1587, 2017.
Hall, R. B., Foord, E. E., Keller, D. J., and Keller, W. D.: Phosphates in
some Missouri refractory clays, Clays Clay Minerals, 45, 353–364, 1997.
Henry, D. J., Dutrow, B. L., and Selverstone, J.: Compositional asymmetry in
replacement tourmaline – An example from the Tauern Window, eastern Alps,
Geol. Mat. Res., 4, 1–18, 2002.
Herron, M. M.: Geochemical classification of terrigenous sands and shales
from core or log data, J. Sed. Petrol., 58, 820–829, 1988.
Hikov, A.: Geochemistry of hydrothermally altered rocks from the Asarel
porphyry copper deposit, central Srednogorie, Geol. Balcanica, 42, 3–28,
2013.
Karakaya, M. Ç., Karakaya, N., Küpeli, Ş., and Yavuz, F.:
Mineralogy and geochemical behavior of trace elements of hydrothermal
alteration types in the volcanogenic massive sulfide deposits, NE Turkey,
Ore Geol. Rev., 48, 197–224, 2012.
Kasemann, S., Meixner, A., Rocholl, A., Vennemann, T., Rosner, M., Schmitt,
A., and Wiedenbeck, M.: Boron and oxygen isotope composition of certified
reference materials NIST SRMs 610/612 and reference materials JB-2 and JR-2,
Geostandard Newsletter, 25, 405–416, 2001.
Kasemann, S. A., Meixner, A., Erzinger, J., Viramonte, J. G., Alonso, R. N.,
and Franz, G.: Boron isotope composition of geothermal fluids and borate
minerals from salar deposits (central Andes/NW Argentina), J. S.
Am. Earth Sci., 16, 685–697, 2004.
Khashgerel, B.-E., Kavalieris, I., and Hayashi, K.-I.: Mineralogy, textures,
and whole-rock geochemistry of advanced argillic alteration: Hugo Dummett
porphyry Cu–Au deposit, Oyu Tolgoi mineral district, Mongolia, Mineral.,
Dep., 43, 913–932, 2008.
Kravchuk, K. G. and Valyashko, V. M.: Equilibrium diagram of the system
Na2O–SiO2–H2O, in: Methods of experimental
investigations of hydrothermal equilibria, edited by: Godovikov, A. A., Nauka, Novosibirsk, 105–117, 1979 (in Russian).
Lammerer, B.: Das Authochton im Westlichen Tauernfenster, Jb. Geol. B.-A.
Wien, Austria, 129, 51–67, 1986.
Lammerer, B. and Morteani, G.: Exkursion E8: Schlegeis und Pfitscher Joch,
Zillertaler Alpen, Österr. Mineral. Ges. Wien, 135, 185–197, 1990.
Lammerer, B. and Weger, M.: Footwall uplift in an orogeneic wedge: The
Tauern Window in the Eastern Alps of Europe, Tectonophysics, 285, 213–230,
1998.
Lammerer, B., Gebrande, H., Lüschen, E., and Veselá, P.: A
crustal-scale cross-section through the Tauern Window (eastern Alps) from
geophysical and geological data, Geol. Soc., London Spec. Pub., 298,
219–229, 2008.
Lammerer, B., Selverstone, J., and Franz, G.: Field trip to the Tauern
Window region along the TRANSALP seismic profile, eastern Alps, Austria,
Geol. Soc. Amer., Field Guide 22, 1–20, 2011.
Land, L. S., Mack, L. E., Milliken, K. L., and Lynch, F. L.: Burial
diagenesis of argillaceous sediment, south Texas Gulf of Mexico sedimentary
basin: A reexamination, Geol. Soc. Am. Bull., 109, 2–15, 1997.
Leising, J. F., Tyler, S. W., and Miller, W. W.: Convection of saline brines
in enclosed lacustrine basins: A mechanism for potassium metasomatism, Geol.
Soc. Am. Bull., 107, 1157–1163, 1995.
Li, X.-C., Fan, H.-R., Santosh, M., Hu, F.-F., Yang, K.-F., and Lan, T.-G.:
Hydrothermal alteration associated with Mesozoic granite-hosted gold
mineralization at the Sanshandao deposit, Jiaodong gold province, China, Ore
Geol. Rev., 53, 403–421, 2013.
Lottermoser, B. G.: Rare earth elements and hydrothermal ore formation
processes, Ore Geol. Rev. 7, 25–41, 1992.
Marfil, S. A., Maiza, P. J., and Montecchiari, N.: Alteration zonation in
the Loma Blanca kaolin deposit, Los Menucos, Province of Rio Negro,
Argentina, Clay Minerals, 45, 145–157, 2010.
MacLean, W. H., and Hoy, L. D.: Geochemistry of hydrothermally altered rocks
at the Horne mine, Noranda, Quebec, Econ. Geol. 86, 506–528, 1991.
McArthur, J. M., Howarth, R. J. and Shields, G. A.: Strontium Isotope
Stratigraphy, The Geologic Time Scale, Cambridge University Press, 127–144, 2012.
Melcher, F., Prochaska, W., Raith, J. G., and Saini-Eidukat, B.: The
metamorphosed molybdenum vein-deposit of the Alpeinerscharte, Tyrol
(Austria) and its relation to Variscan granitoids, Mineral. Deposita, 31,
277–289, 1996.
Melzer, S. and Wunder, B.: Island-arc basalt alkali rations – Constraints
from phengite-fluid partitioning experiments, Geology, 28, 583–586, 2000.
Melzer, S. and Wunder, B.: K-Rb-Cs partitioning between phlogopite and
fluid: Experiments and consequences for the LILE signatures of island arc
basalts, Lithos 59, 69–90, 2001.
Middlemost, E. A.: Naming materials in the magma/igneous rock system,
Earth-Sci. Rev., 37, 215–224, 1994.
Mordberg, L. E., Stanley, C. J., and Germann, K..: Rare earth element
anomalies in crandallite group minerals from the Schugorsk bauxite deposit,
Timan, Russia. Europ. J. Min., 12, 1229–1243, 2000.
Morteani, G.: Petrology of the Tauern Window, Austrian Alps, Fortschr.
Mineral., 52, 195–220, 1974.
Morteani, G. and Ackermand, D.: Aluminium phosphates in muscovite-kyanite
metaquartzites from Passo di Vizze (Alto Adige, NE Italy), Eur. J. Mineral.,
8, 853–869, 1996.
Morteani, G., Ackermand, D., and Trappe, J.: Aluminium phosphate in
Proterozoic metaquartzites: Implications for the Precambrian oceanic P
budget and development of life, Geol. Soc. Am. Bull. Spec. Pap., 423,
579–592, 2007.
Mostler, H., Heissel, G., and Gasser, G.: Untersuchung von
Erzlagerstätten im Innsbrucker Quarzphyllit und auf der Alpeiner
Scharte, Arch. Lagerstättenf. Geol. BA, 1, 77–83, 1982.
Nesbitt, H. W. and Young, G. M.: Prediction of some weathering trends of
plutonic and volcanic rocks based on thermodynamic and kinetic
considerations, Geochim. Cosmochim. Acta, 48, 1523–1534, 1984.
Nikishin, A. M., Ziegler, P. A., Abott, D., Brunet, M.-F., and Cloething,
S.: Permo-Triassic intraplate magmatism and rifting in Eurasia: implications
for mantle plumes and mantle dynamics, Tectonophics, 351, 3–39,
2002.
Oeser, R. A., Stroncik, N., Moskwa, L.-M., Bernhard, N., Schaller, M.,
Canessa, R., van den Brink, L., Köster, M., Brucker, E., Stock, S., Fuentes, J. P., Godoy, R., Matus, F. J., Oses Pedraza, R., Osses McIntyre, P., Paulino, L., Seguel, O., Bader, M. Y., Boy, J., Dippold, M. A., Ehlers, T.
A., Kühn, P., Kuzyakov, Y., Leinweber, P., Scholten, T., Spielvogel, S.,
Spohn, M., Übernickel, K., Tielbörger, K., Wagner, D., and von
Blanckenburg, F.: Chemistry and microbiology of the critical zone along a
steep climate and vegetation gradient in the Chilean coastal Cordillera,
Catena, 170, 183–203, 2018.
Owens, B. E. and Pasek, M. A.: Kyanite quartzites in the Piedmont province of
Virginia: Evidence for a possible high-sulfidation system, Econ. Geol., 102,
495–509, 2007.
Owens, B. E. and Hollingsworth, J. W.: Mineralogical and geochemical
constraints on the origin of kyanite quartzites in the Kings Mountain
terrain, North Carolina and South Carolina, Southeast. Geol., 53, 81–96,
2018.
Padrones, J. T., Imai, A., and Takahashi, R.: Geochemical behavior of rare
earth elements in weathered granitic rocks in northern Palawan, Philippines,
Res. Geol., 67, 321–353, 2017.
Palmer, M. R. and Swihart, G. H.: Boron isotope geochemistry: an overview,
Rev. Mineral. Geochem., 33, 709–744, 1996.
Pearce, J. A., Harris, N. B. W., and Tindle, A. G.: Trace element
discrimination diagrams for the tectonic interpretation of granitic rocks,
J. Petrol., 25, 956–983, 1984.
Pearce, J. A. and Cann, J. R.: Tectonic setting of basic volcanic rocks
determined using trace element analyses, Earth Planet. Sc. Lett., 19,
290–300, 1973.
Pe-Piper, G. and Dolansky, L. M.: Early diagenetic origin of Al
phosphate-sulfate minerals (woodhouseite and crandallite series) in
terrestrial sandstones, Nova Scotia, Canada, Amer. Mineral., 90, 1434–1441,
2005.
Pourmand, A. N., Dauphas, N., and Ireland, T. J.: A novel extraction
chromatography and MC-IC-MS technique for rapid analysis of REE, Sc and Y:
Revising CI-chondrite and Post-Archean Australian Shale (PAAS), Chem. Geol.,
291, 38–54, 2012.
Rasmussen, B: Early-diagenetic REE-phosphate minerals (florencite,
crandallite, gorceixite and xenotime) in marine sandstones: A major sink for
oceanic phosphorus, Am. J. Sci., 296, 601–632, 1996.
Ratschbacher, L., Merle, O., Davy, P., and Cobbold, P.: Lateral extrusion in
the eastern Alps, Part 1: Boundary conditions and experiments scaled for
gravity, Tectonics, 10, 245–256, 1991.
Ricchi, E., Bergemann, C. A., Gnos, E., Berger, A., Rubatto, D., Whitehouse, M. J., and Walter, F.: Cenozoic deformation in the Tauern Window (Eastern Alps) constrained by in situ Th-Pb dating of fissure monazite, Solid Earth, 11, 437–467, https://doi.org/10.5194/se-11-437-2020, 2020.
Romer, R. L., Meixner, A., and Hahne, K.: Lithium and boron isotopic composition
of sedimentary rocks – the role of source history and depositional
environment: a 250 Ma record from the Cadomian orogeny to the Variscan
orogeny, Gondwana Res., 26, 1093–1110, 2014.
Rosenberg, C. L. and Schneider, S.: The western termination of the SEMP
Fault (eastern Alps) and its bearing on the exhumation of the Tauern Window,
Geol. Soc., London, Spec. Publ., 298, 197–218, 2008.
Rosenberg, C. L., Schneider, S., Scharf, A., Bertrand, A., Hammerschmidt,
K., Rabaute, A., and Brun, J. P.: Relating collisional kinematics to
exhumation processes in the Eastern Alps, Earth Sci. Rev., 176, 311–344,
2018.
Rudnick, R. L. and Gao, S.: Composition of the continental crust,
Treatise on Geochemistry, Elsevier Ltd. 3, 1–64, 2003.
Schaltegger, U., Desmurs, L., Manatschal, G., Müntener, O., Meier, M.,
Frank, M., and Bernoulli, D.: The transition from rifting to sea-floor
spreading within a magma-poor rifted margin: Field and isotopic constraints,
Terra Nova, 14, 156–162, 2002.
Schmid, S. M., Scharf, A., Handy, M. R., and Rosenberg, C. L.: The Tauern
Window (eastern Alps, Austria): A new tectonic map with cross-sections and a
tectonic metamorphic synthesis, Swiss J. Geosci., 106, 1–32, 2013.
Schön, C. and Lammerer, B.: Die postvariskischen Metakonglomerate des
westlichen Tauernfensters, Österreich, Mitt. österr. geol. Ges., 81,
219–232, 1989.
Schorn, A., Neubauer, F., Genser, J., and Bernroider, M.: The Haselgebirge
evaporitic melange in central northern calcareous Alps (Austria): Part of
the Permian to Lower Triassic rift of the Meliata ocean?, Tectonophysics,
583, 28–48, 2013.
Schmid, S. M., Scharf, A., Handy, M. R., and Rosenberg, C. L.: The Tauern
Window (Eastern Alps, Austria): a new tectonic map with cross-sections and a
tectonometamorphic synthesis, Swiss J. Geosci., 106, 1–32, 2013.
Schulz, B.: Alpidische Metamorphose im westlichen Tauernfenster (Ostalpen):
Interpretation mit P-T-Pfaden von Amphiboliten, Zbl. Geol. Paläont. Teil
I, H. 3/4, 315–328, 1996.
Schulz, B., Triboulet, C., and Adren, A.: Microstructures and mineral
chemistry in amphibolites from the western Tauern Window (eastern Alps), and
P-T deformation paths of the Alpine greenschist-amphibolite facies
metamorphism, Mineral. Mag., 59, 641–659, 1995.
Schuster, R. and Stüwe, K.: Permian metamorphic event in the Alps,
Geology, 36, 603–606, 2008.
Scotese, C. R., and Schettino, A.: Late Permian-Early Jurassic
paleogeography of western Tethys and the world, in: Permo-Triassic Salt
Provinces of Europe, North Africa and the Atlantic Margins,
Elsevier, 57–95, 2017.
Selverstone, J.: Petrologic constraints on imbrication, metamorphism, and
uplift in the SW Tauern Window, eastern Alps, Tectonics, 4, 607–704, 1985.
Selverstone, J.: Evidence for east-west crustal extension in the eastern
Alps: Implications for the unroofing history of the Tauern Window,
Tectonics, 7, 87–105, 1988.
Selverstone, J.: Micro- to macroscale interactions between deformational and
metamorphic processes, Tauern Window, eastern Alps, Schweiz. Mineral.
Petrogr. Mitt., 73, 229–239, 1993.
Selverstone, J. and Hyatt, J.: Chemical and physical responses to
deformation in micaceous quartzites from the Tauern Window, eastern Alps, J.
Metam. Geol., 21, 335–345, 2003.
Selverstone, J. and Muñoz, J. L.: Fluid heterogeneities and hornblende
stability in interlayered graphitic and nongraphitic schists (Tauern Window,
eastern Alps), Contrib. Mineral. Petrol. 96, 426–440, 1987.
Selverstone, J. and Spear, F. S.: Metamorphic P-T paths from pelitic schists
and greenstones from the south-west Tauern Window, eastern Alps, J. Metam.
Geol., 3, 439–465, 1985.
Selverstone, J., Spear, F. S., Franz, G., and Morteani, G.: High-pressure
metamorphism in the SW Tauern Window, Austria: P-T paths from
hornblende-kyanite-staurolite-schists, J. Petrol., 25, 501–531, 1984.
Selverstone, J., Morteani, G., and Staude, J. M.: Fluid channeling during
ductile shearing: Transformation of granodiorite into aluminous schist in
the Tauern Window, eastern Alps, J. Metam. Geol., 9, 419–431, 1991.
Skelton, A. D. L., Graham, C. M., and Bickle, M. J.: Lithological and
structural controls on regional 3-D fluid flow patterns during greenschist
facies metamorphism of the Dalradian of the SW Scottish Highlands, J. Petrol., 36, 563–586, 1995.
Slack, J. F., Passchier, C. W., and Zhang, J. S.: Metasomatic tourmalinite
formation along basement-cover décollements, Orobic Alps, Italy,
Schweiz. Mineral. Petrogr. Mitt., 76, 193–207, 1996.
Smith, G. I., Medrano, M. D., and Anovitz, L. M.: Boron: Mineralogy,
petrology and geochemistry, Rev. Mineralogy, 33, 263–298,1996.
Smirnov, S. Z., Thomas, V. G., Demin, S. P., and Drebushchak, V. A.:
Experimental study of boron solubility and speciation in the
Na2O–B2O3–SiO2–H2O system, Chem. Geol., 223, 16–34, 2005.
Steffen, K., Selverstone, J., and Brearley, A.: Episodic weakening and
strengthening during synmetamorphic deformation in a deep-crustal shear zone
in the Alps, in: The Nature and Tectonic Significance of Fault Zone
Weakening, edited by: Holdsworth, R. E., Strachan, R. A., Magloughlin, J. F., and Knipe, R. J., Geological Society, London, 141–156, 2001.
Steffen, K. and Selverstone, J.: Retrieval of P-T information from shear
zones: Thermobarometric consequences of changes in plagioclase deformation
mechanisms, Contrib. Mineral. Petrol., 151, 600–614, 2006.
Tauson, V. L., Taroev, V. K., Akimov, V. V., Gottlicher, J., Pentinghaus,
H., and Rocholl, A.: New data on Cs and Rb distribution between potassium
feldspar and alkaline fluid: A study of the trapping effect, Geochem. Int.,
39, 725–734, 2001.
Thyne, G.: A model for diagenetic mass transfer between adjacent sandstone
and shale, Marine Petrol. Geol., 18, 743–755, 2001.
Tonarini, S., Pennisi, M., and Leeman, W. P.: Precise boron isotopic analysis of complex silicate (rock) samples using alkali carbonate fusion and
ion-exchange separation, Chem. Geol., 142, 129–137, 1997.
Trumbull, R. B., Krienitz, M.-S., Grundmann, G., and Wiedenbeck M.:
Tourmaline geochemistry and δ11B variations as a guide to
fluid–rock interaction in the Habachtal emerald deposit, Tauern Window,
Austria, Contrib. Mineral. Petrol., 157, 411–427, 2008.
Turekian, K. K. and Wedepohl, K. H.: Distribution of the elements in some
major units of the Earth's crust, Geol. Soc. Amer. Bull., 72, 175–192, 1961.
Valyashko, V. M.: Phase equilibria and properties of hydrothermal systems,
Nauka, Moscow, 270 pp., 1990.
Veselá, P. and Lammerer, B.: The Pfitsch-Mörchner basin, an example
of the post-Variscan sedimentary evolution in the Tauern Window (eastern
Alps), Swiss J. Geosci., 101, 73–88, 2008.
Veselá, P., Söllner, F., Finger, F., and Gerdes, A.:
Magmato-sedimentary Carboniferous to Jurassic evolution of the western
Tauern window, eastern Alps (constraints from U-Pb zircon dating and
geochemistry), Int. J. Earth Sci., 100, 993–1027, 2011.
von Goerne, G., Franz, G., and Heinrich, W.: Synthesis of tourmaline
solid solutions in the system
Na2O–MgO–Al2O3–SiO2–B2O3–H2O–HCl
and the distribution of Na between tourmaline and fluid at 300 to
700 ∘C and 200 MPa, Contrib. Mineral. Petr.,
141, 160–173, 2001.
Williams, L. B., Hervig, R. L., Holloway, J. R., and Hutcheon, I.: Boron
isotope geochemistry during diagenesis, Part 1. Experimental determination
of fractionation during illitization of smectite, Geochim. Cosmochim. Acta,
65, 1769–1782, 2001.
Williams, J. C., Stebbins, A., and Brookfield, M. E.: Geochemical changes
across a marginal marine Permo-Triassic boundary section on the Adria
carbonate platform at Brsnina, Slovenia, Int. J. Earth
Sci., 110, 923–942, 2021.
Wunder, B., Meixner, A., Romer, R. L., Wirth, R., and Heinrich, W.: The
geochemical cycle of boron: Constraints from boron isotope partitioning
experiments between mica and fluid, Lithos 84, 206–216, 2005.
Yuan, S., Neubauer, F., Liu, Y., Genser, J., Liu, B., Yu, S., Chang, R., and
Guan, Q.: Widespread Permian granite magmatism in Lower Austroalpine units:
significance for Permian rifting in the Eastern Alps, Swiss J.
Geosci., 113, 18, https://doi.org/10.1186/s00015-020-00371-5, 2020.
Short summary
Metamorphic rocks contain information about their original rocks and thus provide insight into the earlier stages of a region of interest. Here, we used the whole-rock chemical composition and stable boron isotopes of a suite of rocks from the Alps (Italy–Austria), which were deposited in a restricted intramontane basin before the Alpine orogeny. It is possible to reconstruct the depositional conditions for these sediments, which are now common metamorphic rocks such as schists and gneisses.
Metamorphic rocks contain information about their original rocks and thus provide insight into...
