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Palladogermanide PdGe2 from Sulfidized Anorthosite of the Yoko-Dovyren Intrusion: First Finding in Russia

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Abstract

The Yoko-Dovyren ultramafic–mafic layered intrusion includes the Baikal deposit of Cu–Ni sulfide ores with Pt–Pd mineralization in the bottom part, and “horizons” and pockets of low-sulfide ores with Pt–Pd mineralization at the upper levels of the section. The highest concentration of Pd, Pt, Au, Ag, Hg, and Cd, as well as the widest variability in the noble-metal minerals, is typical of the vein-like bodies of anorthosite and pegmatoid anorthosite in the upper part of the critical horizon at the boundary between troctolite and the overlying gabbronorite. Most of the noble-metal minerals are the postmagmatic pneumatolytic (fluid–metasomatic) phases. Among them are palladogermanide with 19.8 wt % Ge, paolovite with 8.1% Ge, and zvyagintsevite with 0.55% Ge. The composition of palladogermanide is Pd2.03(Ge0.80As0.15Bi0.02)0.97; Ge is significantly replaced with As in this phase, which is typical of endogenic Ge minerals.

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FUNDING

This study was supported by the Russian Science Foundation, project no. 16-17-10129. We used equipment acquired at the expense of the Development Program of Moscow State University.

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Authors and Affiliations

  1. Moscow State University, 119234, Moscow, Russia

    E. M. Spiridonov, A. A. Ariskin, N. N. Korotaeva & V. O. Yapaskurt

  2. Geological Institute, Siberian Branch, Russian Academy of Sciences, 670047, Ulan-Ude, Russia

    D. A. Orsoev & E. V. Kislov

  3. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    A. A. Ariskin & G. S. Nikolaev

Authors
  1. E. M. Spiridonov
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  2. D. A. Orsoev
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  3. A. A. Ariskin
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  4. E. V. Kislov
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  5. N. N. Korotaeva
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  6. G. S. Nikolaev
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  7. V. O. Yapaskurt
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Correspondence to E. M. Spiridonov.

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Translated by A. Bobrov

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Spiridonov, E.M., Orsoev, D.A., Ariskin, A.A. et al. Palladogermanide PdGe2 from Sulfidized Anorthosite of the Yoko-Dovyren Intrusion: First Finding in Russia. Dokl. Earth Sc. 485, 458–460 (2019). https://doi.org/10.1134/S1028334X19040251

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  • DOI: https://doi.org/10.1134/S1028334X19040251

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