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 

机构地区：[1]Center of Earth＇s Environment ＆ Resources, Guangzhou, GD 510275, China [2]Dept. of Earth Sciences, Zhongshan University, Guangzhou, GD 510275, china [3]Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing 100037, China

出　　处：《Geotectonica et Metallogenia》2005年第2期107-115,共9页大地构造与成矿学（英文版）

基　　金：Ministry of Science and Technology 973 Program(Grant No.2002CB412600-VI);NSFC(Grant No.40073010);the Ph.D.Training Base Fund the National Education Ministry of China(Grant Nos.20040558050,20000099815)

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-A1203 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. 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 A1/（AI＋Fe＋Mn）, Co/Ni, Fe/Ti and TiO2-A1203 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 hvdrothermal water.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.

关 键 词：chert sedimentary structure hydrothermal sedimentation metallic mineralization Southern Tibet 

分 类 号：P611[天文地球—矿床学]