Palladogermanide Pd2Ge 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.


About the authors

E. M. Spiridonov

Lomonosov Moscow State University

Author for correspondence.
Email: ernstspiridon@gmail.com

Russian Federation, 1, Leninskie gory, Moscow, 119991

D. A. Orsoev

Geological Institute, Siberian Branch of the Russian Academy of Sciences

Email: ernstspiridon@gmail.com

Russian Federation, 6A, Sakhyanova street, Ulan-Ude, 670047

A. A. Ariskin

Lomonosov Moscow State University; Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Science

Email: ernstspiridon@gmail.com

Russian Federation, 1, Leninskie gory, Moscow, 119991; 19, Kosygin street, Moscow, 119991

E. V. Kislov

Geological Institute, Siberian Branch of the Russian Academy of Sciences

Email: ernstspiridon@gmail.com

Russian Federation, 6A, Sakhyanova street, Ulan-Ude, 670047

N. N. Korotaeva

Lomonosov Moscow State University

Email: ernstspiridon@gmail.com

Russian Federation, 1, Leninskie gory, Moscow, 119991

G. S. Nikolaev

Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Science

Email: ernstspiridon@gmail.com

Russian Federation, 19, Kosygin street, Moscow, 119991

V. O. Yapaskurt

Lomonosov Moscow State University

Email: ernstspiridon@gmail.com

Russian Federation, 1, Leninskie gory, Moscow, 119991

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