Precious-Metal Mineralization in Gabbroids of the Kumba Intrusive, Uralian Platinum Belt (North Urals)

IF 0.8 4区 地球科学 Q3 GEOLOGY Geology of Ore Deposits Pub Date : 2024-03-06 DOI:10.1134/s1075701523090040
V. V. Mikhailov, S. Yu. Stepanov, S. V. Petrov, R. S. Palamarchuk
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Abstract

The paper presents the first data on the distribution and composition of copper–precious-metal mineralization in gabbroids of the Kumba intrusive (North Urals). The precious-metal mineralization is associated with digenite–bornite, bornite-chalcopyrite, and pyrite–chalcopyrite ores. Nine precious-metal minerals and their varieties were identified in amphibole and amphibole–olivine gabbro of the Kumba intrusive for the first time: native gold, Au–Ag alloys, Ag and Pd tellurides (hessite, merenskyite), Bi tellurides (kotulskite), antimonide–arsenides (isomertieite), arsenides (arsenopalladinite, sperrylite), and stannides (atokite) of Pt and Pd. Precious-metal minerals from all sulfide assemblages in heavy concentrates are often accompanied by antimonides (stibnite) and Bi mineralization represented mainly by native bismuth and bismuthinite and less common sulfotellurides (baksanite) and tellurides (tsumoite). Our results make it possible to estimate the prospects of the discovery of new copper–precious-metal deposits hosted in gabbro of the Uralian Platinum Belt. Taking into account the regularities of distribution of precious metal and copper mineralization, most gabbro massifs in the Uralian Platinum Belt can be considered the promising objects for searching the large-tonnage copper deposits with associated ore Au and Pd grades.

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乌拉尔铂金带(北乌拉尔)昆巴侵入体辉长岩中的贵金属成矿作用
摘要 本文首次提供了有关昆巴侵入体(北乌拉尔)辉长岩中铜贵金属矿化物的分布和组成的数据。贵金属矿化与黝帘石-黄铁矿、黄铜矿和黄铁矿-黄铜矿矿石有关。在昆巴侵入体的闪长岩和闪长-橄榄辉长岩中首次发现了九种贵金属矿物及其品种:原生金、金银合金、银碲化物和钯碲化物(hesite、merenskyite)、铋碲化物(kotulskite)、锑砷化物(isomertieite)、砷化物(礜石、sperrylite)以及铂和钯的锡化物(atokite)。重精矿中所有硫化物集合体中的贵金属矿物通常伴有锑化物(锡矿石)和铋矿化,主要由原生铋和铋石以及不太常见的硫碲化物(巴克桑石)和碲化物(黝帘石)代表。我们的研究结果使我们能够估计在乌拉尔铂金带辉长岩中发现新的铜贵金属矿床的前景。考虑到贵金属和铜矿化分布的规律性,可以认为乌拉尔铂金带的大多数辉长岩岩体是寻找大吨位铜矿床和伴生矿石金、钯品位的理想对象。
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来源期刊
Geology of Ore Deposits
Geology of Ore Deposits 地学-地质学
CiteScore
1.10
自引率
14.30%
发文量
24
审稿时长
6-12 weeks
期刊介绍: Geology of Ore Deposits is a periodical covering the topic of metallic and nonmetallic mineral deposits, their formation conditions, and spatial and temporal distribution. The journal publishes original scientific articles and reviews on a wide range of problems in theoretical and applied geology. The journal focuses on the following problems: deep geological structure and geodynamic environment of ore formation; distribution pattern of metallogenic zones and mineral deposits; geology and formation environment of large and unique metallic and nonmetallic deposits; mineralogy of metallic and nonmetallic deposits; physicochemical and isotopic characteristics and geochemical environment of ore deposition; evolution of ore-forming systems; radiogeology and radioecology, economic problems in exploring, developing, and mining of ore commodities.
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