Email this article Low-sulfide mineralization with high Pd–Pt–Rh tenor in anorthosites from the Yoko-Dovyren massif
- Authors: Sobolev S.N.1, Pshenitsyn I.V.1, Ariskin A.A.1,2, Kubrakova I.V.1, Tyutyunnik O.A.1, Yapaskurt V.O.2, Ryazantsev K.M.1
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Affiliations:
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences
- Lomonosov Moscow State University, Faculty of Geology
- Issue: Vol 523, No 1 (2025)
- Pages: 121-127
- Section: MINERALOGY
- Submitted: 14.10.2025
- Published: 15.06.2025
- URL: https://journals.rcsi.science/2686-7397/article/view/327972
- DOI: https://doi.org/10.31857/S2686739725070121
- ID: 327972
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Abstract
In the Yoko-Dovyren massif, during a geochemical study of taxitic PGE-bearing anorthosites of Reef I, a type of rock with a high ratio (tenor) of light platinum group elements (PGE) to sulfur was described for the first time. Such rocks contain a total of up to 10.5 ppm Pd–Pt–Rh and <0.06 wt. % S. They are combined in Reef I with already known anorthosites that have moderate PGE/S ratios and contain, according to our data, up to 6.5 ppm Pd–Pt–Rh in total and 0.3–1.5 wt. % S. High-tenor PGE anorthosite areas consist of plagioclase, may contain small amounts of olivine, and always contain orthopyroxene (several wt. %), presented by amoeboid poikilitic crystals up to 10 cm in size. They contain intergrowths of Fe-Ni-Cu sulfides and hydrous minerals, usually no larger than 100 μm in size and containing numerous submicron PGE grains. The extreme PGE/S ratio can be interpreted as the result of local accumulation of late fractions of a PGE-rich sulfide melt formed by crystallization of an immiscible sulfide liquid.
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About the authors
S. N. Sobolev
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences
Email: ssn_collection@bk.ru
Moscow, Russia
I. V. Pshenitsyn
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of SciencesMoscow, Russia
A. A. Ariskin
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences; Lomonosov Moscow State University, Faculty of GeologyMoscow, Russia; Moscow, Russia
I. V. Kubrakova
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of SciencesMoscow, Russia
O. A. Tyutyunnik
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of SciencesMoscow, Russia
V. O. Yapaskurt
Lomonosov Moscow State University, Faculty of GeologyMoscow, Russia
K. M. Ryazantsev
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of SciencesMoscow, Russia
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