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谢志清,刘志武.南祁连盆地西段中上侏罗统沉积相特征与沉积演化[J].河北工程大学自然版,2020,37(2):88-99
南祁连盆地西段中上侏罗统沉积相特征与沉积演化
Sedimentary Facies Characteristics and Sedimentary Evolution of Middle and Upper Jurassic in the Western Section of the Southern Qilian Basin
投稿时间:2020-02-05  
DOI:10.3969/j.issn.1673-9469.2020.02.014
中文关键词:  沉积相  沉积演化  中上侏罗统  南祁连盆地
英文关键词:sedimentary facies  sedimentary evolution  Middle and Upper Jurassic  Southern Qilian Basin
基金项目:国家自然科学基金资助项目(41702144)
作者单位
谢志清 中国煤炭地质总局勘查研究总院, 北京 100039 
刘志武 长安大学 地球科学与资源学院, 陕西 西安 710054 
摘要点击次数: 24
全文下载次数: 17
中文摘要:
      为明确南祁连盆地西段中上侏罗统沉积相特征及其演化过程,在对向阳煤矿、新沟煤矿以及瓦乌斯多索卡等剖面详细观察的基础上,进行了研究区中上侏罗统岩石学特征、古生物特征以及岩性组合分析,划分了沉积相,并探讨了研究区中晚侏罗世的沉积演化过程。研究表明:研究区中上侏罗统主要发育河漫、堤岸、河床沉积、扇三角洲平原、三角洲前缘以及滨浅湖亚相沉积。侏罗纪,南祁连盆地西段新沟-向阳煤矿与瓦乌斯多索卡分属不同的沉积盆地,沉积相差异明显,呈现不同的沉积演化过程。中侏罗世,向阳煤矿一带主要为曲流河沉积,新沟煤矿一带主要为扇三角洲平原沉积,瓦乌斯多索卡一带为浅湖沉积;晚侏罗世,向阳煤矿一带隆起不接受沉积,新沟煤矿主要为滨浅湖沉积,瓦乌斯多索卡一带为滨湖沉积。
英文摘要:
      In order to discuss sedimentary facies and sedimentary evolution of middle and upper Jurassic in the western section of South Qilian Basin. Lithological characteristics, paleontological characteristics and lithologic assemblage of middle and upper Jurassic in the study area were analyzed. The results show that the middle and upper Jurassic in the study area were composed of river diffuse, embankment, river bed deposition, fan delta plain, delta front and coastal shallow lake subfacies. Sedimentary facies studies show that Xingou-Xiangyang coal mine and Wausdosoka were belong to different sedimentary basins in Jurassic, respectively. And the differences of sediment facies are obvious, showing different processes of sediment evolution. In the middle Jurassic, the Xiangyang coal mine was mainly composed of meandering river deposit, the Xingou coal mine was mainly composed of fan delta plain deposit, and the area of Waustusoka was composed of shallow lake deposit. Late Jurassic, there were not deposit in Xiangyang coal mine, and the Xingou coal mine was mainly composed of the coastal shallow lake deposition, and the Wausdosoka area was composed of lakeside deposition.
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