Dynamic processes of ore-forming fluid and the localization of orebody: case study on the sediment-hosted gold deposits of southwestern Guizhou, China  

作　　者：ZHANG Chengbo and ZHANG Zheru Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 

出　　处：《Chinese Science Bulletin》1999年第S2期263-265,共3页

摘　　要：1 Geological setting and occurrence features of the sediment-hosted gold deposits OVER 100 sediment-hosted gold deposits and occurrences of southwestern Guizhou lie near the sonthemedge of the Yangtze craton, which is composed of crystalline rocks of Proterozoic age, overlain mainly byPaleozoic and Lower to Middle Triassic shallow-marine platform and reef facies carbonates that gradesouthward and eastward into a thick section of interbedded siltstones and turbidite sandstones. Clasticdeposits were from the Yunkai Old Land and the Jiangnan Old Land respectively. The rocks were foldedand faulted during the Yanshanian orogeny, 190-65 Ma ago. Mineral deposits were mainly located inthe breccia horizon at the base of the Longtan Formation of Upper Permian, underlain by the massive graylimestone of Lower Permian with a karst unconformity, and the high-angle fault zones in the Triassicargillaceous limestone interlayered with shale, arkose, and fine-grained turbidite sandstone. No

关 键 词：sediment-hosted gold deposits FOSSIL hydrothermal system mathematical model. 

分 类 号：P588.2[天文地球—岩石学]