且末县米特河地区托库孜达坂组下段粒度特征及成因环境分析  

Particle Size Characteristics and Genetic Environment Analysis of the Lower Member of Tuokuzidaban Formation in Mite River Area,Qiemo County

作　　者：陈刚 王东 张中欣 杨晨 CHEN Gang;WANG Dong;ZHANG Zhongxin;YANG Chen(Shandong Geological Exploration Institute of China Chemical Geology and Mine Bureau, Jinan 250013,China)

机构地区：[1]中化地质矿山总局山东地质勘查院,山东济南250013

出　　处：《矿业工程》2021年第4期1-6,共6页Mining Engineering

基　　金：管理中心2016年中央两返基金项目:《新疆且末县米特河一带1∶5万四幅区域地质矿产调查》,项目编号:K16-1-LQ14。

摘　　要：通过野外观察、分析测试,结合覆盖全区的1∶50000区域地质调查资料及其他前人研究成果,选择且末县米特河地区托库孜达坂组下段,对其岩石学特征及层序、成因环境进行了研究。通过研究剖面特征、基本层序、粒度参数、萨胡环境判别公式,结合该套地层的空间展布特征、粒度特征、沉积构造特征,确定砂岩粒度参数显示具有海滩环境沉积的特征;萨胡环境判别公式显示砂岩粒度特征具有浅海环境的沉积特征;结合该段地层的空间展布特征、粒度特征、沉积构造特征,确定该组下段应为浅海-半深海相环境沉积的碎屑岩。Through field observation,analysis and testing,combined with the 1∶50000 regional geological survey data covering the whole region and other previous research results,the lower member of the Tuokuzidaban Formation in the Mite River area of Qiemo County was selected to study its petrological characteristics,sequence and genetic environment.By studying the profile characteristics,basic sequence,grain size parameters,Sahu environment discrimination formula,combined with the spatial distribution characteristics,grain size characteristics,and sedimentary structure characteristics of the set of strata,it is determined that the sandstone particle size parameters show the characteristics of beach environment sedimentation.The Sahu environmental discrimination formula shows that the grain size characteristics of sandstone have the sedimentary characteristics of shallow sea environment.Combined with the spatial distribution characteristics,particle size characteristics and sedimentary structure characteristics of this member of strata,it is determined that the lower member of this group should be clastic rocks deposited in shallow sea-semi-deep sea facies environment.

关 键 词：米特河地区 托库孜达坂组下段 粒度特征 成因环境 

分 类 号：TD235.21[矿业工程—矿井建设]