The characteristics of chert from micro-disseminated gold deposits and their origin significance in southwestern Guizhou, China

查看全文 作　　者：LIU Jiajun~1, LIU Congqiang~1, LIU Jianming~2 and GU Tuan~1 1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;2. The Reseatrch Center of Mineral Resources Exploration, Chinese Academy of Sciences, Beijing 100101, China 出　　处：《Chinese Science Bulletin》索引1999年第44卷第S2期,共2页 摘　　要：THE southwestern Guizhou Province has been acknowledged as one of the most important and potentialgold producing areas in the People’ s Republic of China and has attracted world-wide attention since thediscovery of a series of sediment-hosted micro-disseminated gold deposits in the last twenty years. Chertwidely occurs in the gold deposits. Study on geology and geochemistry of the chert may be important for abetter understanding of the forming condition and process of gold. 1 Characteristics of chert THE cherts are characterized by bedded, massived, pseudobrecciated and nodular structures, occurring insynsedimentary fault. The thickness of a chert bed generally varies from several meters to less than 20meters, with the maximum up to about 70 meters. Host elements are simple and concentrated in thecherts. The SiO₂ concentration of the cherts varies from 86.4 % to 95.64 %, 91.95% on average 关 键 词：chert MICRO-DISSEMINATED gold DEPOSITS Guizhou.