Nature of pyrite 'pebbles' from the Witwatersrand gold-ore deposits, South Africa

被引：0

作者：

Shcheglov, A.D. ^{[1
]}

Shumskaya, N.I. ^{[1
]}

机构：

[1] Karpinskiy Geological Research Inst, St. Petersburg, Russia

来源：

Transactions (Doklady) of the Russian Academy of Sciences. Earth science sections. | 1996年 / 344卷 / 07期

关键词：

Gold deposits - Metamorphic rocks - Morphology - Ore deposits - Petrology - Pyrites - Reefs - Sedimentary rocks;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The quartz of the Witwatersrand gold-ore deposits contain abundant pebblelike forms of pyrite. The pyrite and its pebblelike forms have been studied by a number of authors. The data obtained in this study indicate that pebblelike pyrite forms in the Witwatersrand gold-bearing conglomerates make up four groups: (1) consisting of round, ellipsoidal or, less commonly, pear-shaped concretions, usually with a concentrically zoned structure; (2) representing pyrite pseudomorphs after alluvial pebbles of different compositions; (3) represented by so-called 'shot'; (4) represented by round pyrite shapes. The occurrence of these four groups of pseudopebbles suggests that in the Witwatersrand ores, there are no alluvial pyrite pebbles.

引用

页码：93 / 97