锗、银、金大型超大型矿床的有机地球化学研究

锗、银、金大型超大型矿床的有机地球化学研究庄汉平（中国科学院地球化学研究所，贵阳５５０００２）关键词有机质—金属相互作用褐煤型超大型锗矿床黑色页岩型银钒矿床卡林型金矿床有机地球化学有机质—金属相互作用是有关超大型矿床基础理论研究的重要内容之一。在以往...

Organic Geochemistry of Large/Superlarge Deposits of Germanium,Silver and Gold in China

This paper deals with some organic geochemical aspects of typical superlarge/large deposits in China,including Lincang superlarge germanium deposit in Yunnan,Bai guoyuan black shale hosted silver vanadium deposit in Hubei and Carlin type gold deposits in Southwest Guizhou.Selected results are listed as following:(1)mineralized coal in Lincang superlarge germanium deposit is low maturity lignite containing corpohuminite,alginite and sclerotinite,more than 85% of Ge occurs organically.Ge mineralizing processes involved weathering,gelatification and early diagensis;sufficient source and strong gelatification were favorable factors to formation of superlarge Ge deposit.(2)Baiguoyuan black shale hosted Ag V deposit formed in euxinic marine environment;Ag occurs mainly in isomorphism (46.73%),in minerals (28.85%),and partly occurs organically(23.27%);V occurs in isomorphism (97.41%)in illite and barite,Ag is of sedimentation-diagenesis-transformation origin while V is of sedimentation-diagenesis origin.(3)Crude oil transported gold as carrier of Au and took part in Au precipitation by TSR;solid organic matter is classified into original maceral and exogenous pyrobitumen,ore forming fluid contains abundant gaseous hydrocarbon.