Articles | Volume 34, issue 6
https://doi.org/10.5194/ejm-34-549-2022
https://doi.org/10.5194/ejm-34-549-2022
Research article
 | Highlight paper
 | 
15 Nov 2022
Research article | Highlight paper |  | 15 Nov 2022

Relatively oxidized conditions for diamond formation at Udachnaya (Siberia)

Luca Faccincani, Valerio Cerantola, Fabrizio Nestola, Paolo Nimis, Luca Ziberna, Leonardo Pasqualetto, Aleksandr I. Chumakov, Jeffrey W. Harris, and Massimo Coltorti

Related authors

Tetrahedrite-(Cd), Cu6(Cu4Cd2)Sb4S13, from Radětice near Příbram, Czech Republic: the new Cd member of the tetrahedrite group
Jiří Sejkora, Cristian Biagioni, Pavel Škácha, Silvia Musetti, Anatoly V. Kasatkin, and Fabrizio Nestola
Eur. J. Mineral., 35, 897–907, https://doi.org/10.5194/ejm-35-897-2023,https://doi.org/10.5194/ejm-35-897-2023, 2023
Short summary
Elasticity of mixtures and implications for piezobarometry of mixed-phase inclusions
Ross J. Angel, Mattia L. Mazzucchelli, Kira A. Musiyachenko, Fabrizio Nestola, and Matteo Alvaro
Eur. J. Mineral., 35, 461–478, https://doi.org/10.5194/ejm-35-461-2023,https://doi.org/10.5194/ejm-35-461-2023, 2023
Short summary
In situ single-crystal X-ray diffraction of olivine inclusion in diamond from Shandong, China: implications for the depth of diamond formation
Yanjuan Wang, Fabrizio Nestola, Huaikun Li, Zengqian Hou, Martha G. Pamato, Davide Novella, Alessandra Lorenzetti, Pia Antonietta Antignani, Paolo Cornale, Jacopo Nava, Guochen Dong, and Kai Qu
Eur. J. Mineral., 35, 361–372, https://doi.org/10.5194/ejm-35-361-2023,https://doi.org/10.5194/ejm-35-361-2023, 2023
Short summary
Bobtraillite from Gejiu hyperagpaitic nepheline syenite, southwestern China: new occurrence and crystal structure
Yanjuan Wang, Fabrizio Nestola, Zengqian Hou, Xiangping Gu, Guochen Dong, Zhusen Yang, Guang Fan, Zhibin Xiao, and Kai Qu
Eur. J. Mineral., 35, 65–74, https://doi.org/10.5194/ejm-35-65-2023,https://doi.org/10.5194/ejm-35-65-2023, 2023
Short summary
Women in geosciences within the Italian University system in the last 20 years
Claudia Agnini, Martha G. Pamato, Gabriella Salviulo, Kim A. Barchi, and Fabrizio Nestola
Adv. Geosci., 53, 155–167, https://doi.org/10.5194/adgeo-53-155-2020,https://doi.org/10.5194/adgeo-53-155-2020, 2020
Short summary

Related subject area

Mantle petrology and geochemistry
First measurements of the Fe oxidation state of spinel inclusions in olivine single crystals from Vulture (Italy) with the in situ synchrotron micro-Mössbauer technique
Giulia Marras, Gabriele Carnevale, Antonio Caracausi, Silvio Giuseppe Rotolo, and Vincenzo Stagno
Eur. J. Mineral., 35, 665–678, https://doi.org/10.5194/ejm-35-665-2023,https://doi.org/10.5194/ejm-35-665-2023, 2023
Short summary
Effect of oxygen fugacity on the storage of water in wadsleyite and olivine in H and H–C fluids and implications for melting atop the transition zone
Nathalie Bolfan-Casanova, Loïs Martinek, Geeth Manthilake, Maximilien Verdier-Paoletti, and Paul Chauvigne
Eur. J. Mineral., 35, 549–568, https://doi.org/10.5194/ejm-35-549-2023,https://doi.org/10.5194/ejm-35-549-2023, 2023
Short summary
Iron oxidation state in serpentines and magnesian chlorites of subduction-related rocks
Bruno Reynard, Clémentine Fellah, and Catherine McCammon
Eur. J. Mineral., 34, 645–656, https://doi.org/10.5194/ejm-34-645-2022,https://doi.org/10.5194/ejm-34-645-2022, 2022
Short summary
Ab initio thermal expansion and thermoelastic properties of ringwoodite (γ-Mg2SiO4) at mantle transition zone conditions
Donato Belmonte, Mattia La Fortezza, and Francesca Menescardi
Eur. J. Mineral., 34, 167–182, https://doi.org/10.5194/ejm-34-167-2022,https://doi.org/10.5194/ejm-34-167-2022, 2022
Short summary

Cited articles

Angel, R. J. and Nestola, F.: A century of mineral structures: How well do we know them?, Am. Mineral., 101, 1036–1045, https://doi.org/10.2138/am-2016-5473, 2016. 
Ashchepkov, I. V., Kuligin, S. S., Vladykin, N. V., Downes, H., Vavilov, M. A., Nigmatulina, E. N., Babushkina, S. A., Tychkov, N. S., and Khmelnikova, O. S.: Comparison of mantle lithosphere beneath early Triassic kimberlite fields in Siberian craton reconstructed from deep-seated xenocrysts, Geosci. Front., 7, 639–662, https://doi.org/10.1016/j.gsf.2015.06.004, 2016. 
Aulbach, S. and Stachel, T.: Evidence for oxygen-conserving diamond formation in redox-buffered subducted oceanic crust sampled as eclogite, Nat. Commun., 13, 1924, https://doi.org/10.1038/s41467-022-29567-z, 2022. 
Aulbach, S. and Stagno, V.: Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle, Geology, 44, 751–754, https://doi.org/10.1130/G38070.1, 2016. 
Download
Short summary
We determined the physical conditions at the time of its entrapment for an inclusion pair hosted in a Siberian diamond (Udachnaya kimberlite) and found that it equilibrated under relatively oxidized conditions, near the enstatite–magnesite–olivine–diamond (EMOD) buffer, similarly to Udachnaya xenoliths originating from comparable depths. These results can be reconciled with models suggesting relatively oxidized, water-rich CHO fluids as the most likely parents for lithospheric diamonds.