西藏江孜县沙拉岗锑(金)矿区重力流沉积特征  

SEDIMENTARY NATURES OF THE SHALAGANG Sb(Au) MINING AREA, GYANGZE, TIBET

作　　者：李金高[1] 周祖翼[1] 王全海 彭勇民[3] 姚鹏[3] 

机构地区：[1]同济大学海洋地质系 [2]中国地调局西南地调中心 [3]成都地质矿产研究所

出　　处：《成都理工学院学报》2001年第2期187-190,共4页Journal of Chengdu University of Technology

基　　金：西藏自治区科委重点科技项目!(990 10 7) ;西藏自治区地矿厅重点研究项目

摘　　要：对西藏江孜县沙拉岗锑 (金 )矿区的沉积相进行了划分 ,并重点阐述了颇具特色的各种重力流沉积 (滑动沉积、碎屑流沉积、浊流沉积 ) ,为分析研究锑 (金 )成矿作用提供了丰富的基础资料。Sedimentary facies is firstly divided in the Shalagang Sb(Au) mining area, and all kinds of characteristic gravity flow sediments, for example, slide, debris flow and turbidity deposits, are significantly documented. The well known gravity flow sediments were formed by the debris, slide and turbidity flows in the Late Jurassic Early Cretaceous, which consisted of the slope clastic rocks and interbeds of siliceous rocks and limestones. The lithofacies assemblages of the upper slope, lower slope and submarine fan emerged in the slope. The upper slope was characterized by kinds of sliding sediments and the lower slope by debris flow sediments . The submarine fan can be divided into progressive and regressive sequences, which are composed of sandstone bodies formed by turbidity flow. They provide abundant informations of sedimentary geology for analysing Sb(Au) mineralization in the Shalagang mining area.

关 键 词：西藏 沙拉岗 重力流沉积 锑矿床 沉积相 成矿作用 浊流沉积 

分 类 号：P618.66[天文地球—矿床学] P512.2[天文地球—地质学]