GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS AND RELATED MINERALIZATION OF CHERT FORMATIONS IN SOUTH TIBET

作者：HE Junguo,ZHOU Yongzhang,YANG Zhijun,NIE Fengjun,FU Wei,ZHANG Chengbo

摘要：There occur abundant cherts in the Mesozoic and Cenozoic strata in southern Tibet. Some of them possess characteristic hydrothermal structures such as layered, laminated, massive and breccia structures.Ratios of Al/(Al+Fe+Mn), Co/Ni, Fe/Ti and TiO2-Al2O3 demonstrate that their origin is related to hydrothermal sedimentation. The chert formations have close relationship with Sb, Au and poly-metallic mineralization, and the ore-forming fluid show strong correlation with fossil hydrothermal water.

发文机构：Center of Earth＇s Environment ＆ Resources Dept. of Earth Sciences Institute of Mineral Resources

关键词：沉积结构热液沉降矿化作用西藏地质条件chertsedimentary structurehydrothermal sedimentationmetallic mineralizationSouthern Tibet

分类号： P611[天文地球—矿床学][天文地球—地质学]