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New and unusual Pd-Tl-bearing mineralization in the Anomal'nyi deposit, Kondyor concentrically zoned complex, northern Khabarovskiy kray, Russia

Published online by Cambridge University Press:  02 January 2018

Andrei Y. Barkov ,
Gennadiy I. Shvedov ,
Alexander A. Polonyankin  and
Robert F. Martin
Andrei Y. Barkov*
Affiliation:
Research Laboratory of Industrial and Ore Mineralogy, Cherepovets State University, 5 Lunacharsky Avenue, 162600 Cherepovets, Russia
Gennadiy I. Shvedov
Affiliation:
Institute of Mining, Geology and Geotechnology, Siberian Federal University, 95, Avenue Prospekt im. gazety “Krasnoyarskiy Rabochiy”, 660025 Krasnoyarsk, Russia
Alexander A. Polonyankin
Affiliation:
“Russian Platinum” Group, OOO Russkaya Platina, 17 Plotnikov Pereulok, 119002 Moscow, Russia
Robert F. Martin
Affiliation:
Department of Earth and Planetary Sciences, McGill University, 3450 University Street, Montreal, Quebec H3A 0E8, Canada
*
*E-mail: ore-minerals@mail.ru
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Abstract

New Pd-Tl-(Bi,As)-rich compounds are described from the Anomal'nyi Cu-PGE deposit, Kondyor alkaline ultramafic complex, northeastern Russia. They occur in vein-type settings associated with bodies of 'kosvite' (magnetite-rich clinopyroxenite) in the dunite-(peridotite) core, in pegmatiticand micaceous rocks. The ore zones are substantially enriched in phlogopite; they consist of diopside, disseminated titaniferous magnetite and fluorapatite (Sr-bearing). The observed assemblages of ore minerals include sulfides of the chalcopyrite-bornite-(secondary chalcocite) associationand various species of platinum-group minerals (PGM) [isomertieite or arsenopalladinite rich in Sb, mertieite-II, mertieite-I, sobolevskite, kotulskite, merenskyite, zvyagintsevite, palarstanide, paolovite, sperrylite, maslovite or moncheite, hollingworthite and unnamed species of PGM] anda Ag-Au alloy. The oxides [Pd4(Bi,Te,Tl)O6 and Pd4(Tl,Bi,Te)O6] probably formed in situ by oxidation reactions at the expense of the associated PGM intergrowths. These involve palladium bismuthide-thallide phases, Pd5(Tl,As,Bi)and Pd5(As,Tl,Bi), which are documented here for the first time. A fairly evolved environment, enriched in Cu, Pd, Te, Bi, Pb and volatile components, is indicated for the vein-type deposit at Anomal'nyi.

Keywords

platinum-group elementsplatinum-group mineralsAnomal 'nyi PGE depositconcentrically zoned complexalkali-enriched ultramafic complexKondyorKhabarovskiy krayRussia
Type
Research Article
Information
Mineralogical Magazine , Volume 81 , Issue 3 , June 2017 , pp. 679 - 688
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2017

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