Weathering and Laterites Formation Processes of Gold-Bearing Carbonate Rocks in the Shewushan Gold Deposit, Hubei Province
详细信息
- 责任者：Gao Bangfei (China Railway Resources Group ; Mineral Exploration Company ; Beijing 100039 ; China) ; Jiang Shaoqing
- 刊名：Geology and Prospecting
- 出版年：2011
- 卷期：47(3)
- 关键词：金矿 ; gold ores ; 湖北 ; Hubei Province
- 页码：p.361-369
- 图表：4 illus., 5 tables, 39 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
To reveal the weathering processes of gold-bearing carbonate rocks and their constraint on gold enrichment, this paper, taking the Shewushan lateritic gold deposit in Hubei Province as an example, presents a systematic study of elemental geochemistry and mineralogy. The results show that from the saprolite layer to its relatively upper mottle layer, the contents of FeO, MnO, organic carbon, REE, alkali metals, HSFE and a group of minerals including K-feldspar, plagioclase and pyrite have dramatically declined accompanied by the increase of weathering strength. The study indicates that both weathering of carbonate rocks and gold enrichment are constrained by weathering strength. Finally, in the phase of complete weathering, SiO2 and Al2O3 in silicate separated, forming typical laterites. As a result, gold transported as colloid or the complex of chloride.
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