Articles | Volume 36, issue 5
https://doi.org/10.5194/ejm-36-925-2024
© Author(s) 2024. 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-36-925-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
29 Oct 2024
Research article |
| 29 Oct 2024
| 29 Oct 2024
Micro- to nano-sized solid inclusions in magnetite record skarn reactions
Departamento de Mineralogía y Petrología, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva s/n, 18002 Granada, Spain
José María González-Jiménez
Instituto Andaluz de Ciencias de la Tierra (IACT), CSIC-UGR, Avda. de las Palmeras 4, 18100 Armilla, Granada, Spain
Lola Yesares
Departamento de Mineralogía y Petrología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, C/ Jose Antonio Novais,12, Ciudad Universitaria, 28040 Madrid, Spain
Antonio Acosta-Vigil
Instituto Andaluz de Ciencias de la Tierra (IACT), CSIC-UGR, Avda. de las Palmeras 4, 18100 Armilla, Granada, Spain
Jordi Llopís
Departamento de Mineralogía y Petrología, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva s/n, 18002 Granada, Spain
Fernando Gervilla
Departamento de Mineralogía y Petrología, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva s/n, 18002 Granada, Spain
Instituto Andaluz de Ciencias de la Tierra (IACT), CSIC-UGR, Avda. de las Palmeras 4, 18100 Armilla, Granada, Spain
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Ore deposits and mineral resources
First in situ Lu–Hf garnet date for a lithium–caesium–tantalum (LCT) pegmatite from the Kietyönmäki Li deposit, Somero–Tammela pegmatite region, SW Finland
Mineralogy and mineral chemistry of detrital platinum-group minerals and gold particles from the Elbe, Germany
Multistage fluorite mineralization in the southern Black Forest, Germany: evidence from rare earth element (REE) geochemistry
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A remarkable discovery of electrum on the island of Sylt, northern Germany, and its Scandinavian origin
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Eur. J. Mineral., 36, 433–448, https://doi.org/10.5194/ejm-36-433-2024, https://doi.org/10.5194/ejm-36-433-2024, 2024
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In situ Lu–Hf geochronology of garnet is applied to date a Finnish lithium–caesium–tantalum (LCT) pegmatite from the Somero–Tammela pegmatite region. The age obtained was 1801 ± 53 Ma, which is consistent with zircon ages of 1815–1740 Ma obtained from the same pegmatite. We show the in situ Lu–Hf method is a fast way of obtaining reliable age dates from LCT pegmatites.
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The analysis by electron microprobe of platinum-group minerals, gold and cinnabar particles from heavy mineral concentrates of the Elbe showed a broad compositional variation of Os–Rus–Irs–(Pt) alloys as well as Pts–Fe alloys. The comparison with the literature showed that different sources account for the heavy mineral concentrate. This compositional variation of the alloys is also of interest for other placers of platinum-group minerals worldwide.
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Eur. J. Mineral., 35, 403–426, https://doi.org/10.5194/ejm-35-403-2023, https://doi.org/10.5194/ejm-35-403-2023, 2023
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The diversity of chemical patterns in multi-stage fluorite mineralization from two neighbouring deposits in the Black Forest is investigated. From over 70 samples, 7 fluorite groups and 3 hydrothermal events are identified after chemical and mathematical classification. The relative chronology and features suggest different mineralization histories and source aquifers for both deposits despite their proximity. Genetic differences are likely controlled by different behaviours of their host rocks.
Emmanuel Fritsch, Etienne Balan, Sabine Petit, and Farid Juillot
Eur. J. Mineral., 33, 743–763, https://doi.org/10.5194/ejm-33-743-2021, https://doi.org/10.5194/ejm-33-743-2021, 2021
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The study presents and discusses mid- and near-infrared spectra of three Mg–Ni mineral series (serpentine-like and talc-like minerals, sepiolite) commonly found in reactivated faults and sequences of clay infillings of the New Caledonian Ni-silicate deposits. This spectroscopic study sheds light on the nature of the residual mineral phases found in the clay infillings (serpentine-like minerals) and reveals the aptitude of the newly formed minerals (talc-like minerals and sepiolite) to store Ni.
Daniela Mauro, Cristian Biagioni, and Federica Zaccarini
Eur. J. Mineral., 33, 717–726, https://doi.org/10.5194/ejm-33-717-2021, https://doi.org/10.5194/ejm-33-717-2021, 2021
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This work reports the full crystal-chemical characterization of gersdorffite from Contrada Zillì (Peloritani Mountains, Sicily, Italy). The structural type shown by gersdorffite (ordered polytype 213) and its chemistry agree with low-temperature crystallization conditions. Moreover, the chemical zoning of the studied crystals recorded changes in the crystallization physicochemical conditions. This zoning may be due to a multistage crystallization, related to the evolution of the ore deposits.
Jochen Schlüter, Stephan Schuth, Raúl O. C. Fonseca, and Daniel Wendt
Eur. J. Mineral., 33, 373–387, https://doi.org/10.5194/ejm-33-373-2021, https://doi.org/10.5194/ejm-33-373-2021, 2021
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On the west coast of the German North Sea island of Sylt, an electrum–quartz pebble weighing 10.4 g was discovered in a cliff of Saalian glaciogenic sediments. This is an unusually large and rare precious metal to find. Within our paper we document and characterize this discovery. An attempt to investigate its provenance points towards a southern Norwegian origin. This leads to the conclusion that ice advance events were involved in transporting this pebble from Norway to Germany.
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Short summary
This study examines solid nano-inclusions in magnetite from the La Víbora magnesian skarn, Spain, revealing insights into mineral formation. We found two types of inclusions: representing fossilized skarn reactions and precipitated from supersaturated fluids. Nano-inclusions provide valuable clues about the Fe mineralization event, highlighting the significance of nano-inclusions in understanding geological processes and resource exploration.
This study examines solid nano-inclusions in magnetite from the La Víbora magnesian skarn,...
