云南香格里拉图姆沟组硅质岩地球化学特征及意义  

THE SIGNIFICANCE AND GEOCHEMICAL FEATURE OF SILICALITE IN TUMUGOU FORMATION OF XIANGGELILA,YUNNAN

作　　者：李超民[1] 邓江红[2] 王国芝[2] 任小庆 

机构地区：[1]贵州省地质矿产勘查开发局104地质大队,贵州都匀558000 [2]成都理工大学地球科学学院,四川成都610059 [3]中石化绿源地热能开发有限公司,陕西咸阳712000

出　　处：《云南地质》2014年第3期295-301,共7页Yunnan Geology

摘　　要：本文就香格里拉地区图姆沟组(T3t)的硅质岩岩石学和地球化学特征进行分析研究,进而揭示出晚三叠世早期研究区属于甘孜—理塘洋盆的深水盆地环境,构造相对稳定,形成具深水沉积特征的正常生物沉积硅质岩;晚三叠世中-晚期,伴随甘孜-理塘洋盆向中咱地块俯冲消减,研究区构造活动强烈,热水来源广泛,则主要形成热水沉积硅质岩。In this paper, we have ic rock of Tumugou Formation （T3t） in an analysis and study of the petrographical and geochemical Xianggelila area, which shows that this area belongs to the feature of silic- deep water ba- sin environment of Ganzi-Litang ocean basin of the early stage of Late T, the tectonic environment relatively stable, forming the normal bio-sedimentary silicalite ; because of the subduction of Ganzi-Litang ocean basin toward Zhong- zan massif of middle-late stage of Late T, tectonic activity intense in this area, the thermal water source wide, mainly the hydrothermal sedimentary silicalite is formed.

关 键 词：硅质岩 正常生物沉积 热水沉积 云南香格里拉 

分 类 号：P581[天文地球—岩石学]