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Published in:
2005 | OriginalPaper | Chapter
Gold deposits rich in bismuth minerals: An important type of gold deposits
Authors : Ren Yunsheng, Liu Liandeng, Zhang Huihuang
Published in: Mineral Deposit Research: Meeting the Global Challenge
Publisher: Springer Berlin Heidelberg
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Several gold deposits, both in China and abroad, are drawing attention because of their abundant bismuth minerals. Comparative studies on some of them indicate that certain characteristics can aid in identifying standards and exploration criteria of the type of gold deposits. Firstly, the lode gold ore bodies are structurally controlled. Secondly, the gold ore is rich in bismuth minerals, most of which are major gold-bearing minerals. Thirdly, there is a prominent positive correlation of Au with Bi in the gold ore. Moreover, the phase separation of ore-forming fluid during the major gold metallogenic stage can frequently be shown. Although the Bi-rich gold deposit may belong to a variety of genetic types, high content of elements of Au and Bi in associated igneous rocks, the phase separation of ore-forming fluid play important roles in the mineralizing process.