Mineral composition of Paleoproterozoic metamorphosed massive sulfide ore in the Kola Region (a case study of the Bragino Occurrence, South Pechenga)

Q4 Earth and Planetary Sciences

Zapiski Rossiiskogo Mineralogicheskogo Obshchestva Pub Date : 2019-11-01 DOI:10.30695/zrmo/2019.1485.04

A. Kompanchenko, Компанченко Алёна Аркадьевна, A. Voloshin, Волошин Анатолий Васильевич, A. Bazai, Базай Айя Валериевна

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引用次数: 2

Abstract

Many occurrences and deposits of massive sulfide ores in the Kola Region are connected with the Paleoproterozoic Pechenga—Imandra—Varzuga Rift Belt (2.5—1.7 Ga). They are placed in volcanogenic-sedimentary complexes of South Pechenga (Bragino occurrence) and western part of Imandra-Varzugskaya structural zones (Pyrrhotite Ravine deposit, Tahtarvumchorr occurrence, etc.). The age of massive sulfide ore formation is expected to be about 1.9 Ga. The ores and their host complexes were metamorphosed under conditions close to the amphibolite facies. High degree of metamorphism of massive sulfide ores of the Kola region determined the features of their mineral composition, which are considered on the example of the Bragino occurrence. The article displays ore types, their mineral assemblages, and data on main minerals of ores: pyrrhotite, pyrite, sphalerite, marcasite, etc.

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科拉地区古元古代变质块状硫化物矿石的矿物组成（以南佩奇加Bragino矿点为例）

科拉地区多处块状硫化物矿的赋存与古元古代佩琴加-伊曼德拉-瓦尔祖加裂谷带(2.5 ~ 1.7 Ga)有关。它们被放置在南佩琴加(Bragino产状)和Imandra-Varzugskaya构造带西部(磁黄铁矿峡谷矿床、Tahtarvumchorr产状等)的火山-沉积杂岩中。块状硫化物成矿年龄约为1.9 Ga。矿石及其寄主杂岩体在接近角闪岩相的条件下变质。科拉地区块状硫化矿的高变质程度决定了其矿物组成特征，并以Bragino产状为例加以考虑。介绍了该矿的矿石类型、矿物组合及主要矿物磁黄铁矿、黄铁矿、闪锌矿、黄铁矿等资料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Zapiski Rossiiskogo Mineralogicheskogo Obshchestva Earth and Planetary Sciences-Economic Geology

CiteScore

1.30

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0.00%

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