昆仑山垭口地区第四纪地层石英砂表面特征与沉积环境  

Surface Character and Sedimentary Environment of the Quartz Grains in the Quaternary Strata in Kunlun Mountains Pass Area

作　　者：伍永秋[1] 崔之久[2] 葛道凯[2] 刘耕年[2] 

机构地区：[1]北京师范大学资源科学研究所 [2]北京大学城市与环境学系

出　　处：《应用基础与工程科学学报》1998年第2期11-20,共10页Journal of Basic Science and Engineering

基　　金：国家攀登计划A-85-29资助项目

摘　　要：运用扫描电镜方法，对昆仑山垭口地区三岔河组地层和小南川组地层中的石英砂颗粒的表面特征进行了观察和分析，结果表明了在三岔河组地层沉积时期，相对构造运动平稳，河流有足够的时间来进行侧向侵蚀和堆积，形成宽广的河谷．此为“昆仑－黄河运动”的发现和性质提供了重要的证据．In this paper, the scanning electron microscope (SEM) was used to analyze the surface characteristic of quartz grains. These quartz grains were selected from the Sanchahe Formation and the Xiaonanchuan Formation in Kunlun Mountains Pass Area. The analysis suggests that the tectonic movement was relatively stable during the formed period of the Sanchahe Formation. There were enough time for the lateral erosion and deposit, and for the river to form broad valley. It is an important evidence of the discovery and character of Kunlun Yellow River Tectonic Movement.

关 键 词：昆仑山垭口 石英砂 环境演变 

分 类 号：P531[天文地球—古生物学与地层学]