古地理学报2018，Vol.20Issue(2)：219-230,12.DOI:10.7605/gdlxb.2018.02.016
鄂尔多斯盆地南部中寒武统张夏组颗粒滩沉积特征及控制因素
Sedimentary characteristics and controlling factors of grain banks of the Middle Cambrian Zhangxia Formation in southern Ordos Basin
摘要
Abstract
The carbonate grain banks serve as important oil and gas reservoirs.In this paper,the sedimentary characteristics,distribution and controlling factors of the grain banks of the Middle Cambrian Zhangxia Formation in southern Ordos Basin were studied by integration of outcrop,core,logging and thin section data.Results show that the carbonate grain banks,dominated by oolitic beach,are extensively developed in the Zhangxia Formation in the study area.The rock types of grain banks commonly encompass grain limestone,grain dolomite and crystalline dolomite,and the grain types primarily consist of oolitic,bioclast,gravel-sized debris and sand-sized debris in the Zhangxia Formation in southern Ordos Basin.The grain banks are characterized by vertically superposed coarsening-upword cycles,which form the grain bank deposition with a considerable thickness.Combined with the Cambrian lithofacies palaeogeographic characteristics in the Ordos Basin,it is considered that the characteristics and planar-distribution of the grain banks are comprehensively controlled by relative sea level change,palaeogeomorphology and tectonic activity.Particularly,the rift trough roughly in NE direction significantly controlled the development and distribution of oolitic beaches in the platform of Zhangxia Formation in southern Ordos Basin.关键词
鄂尔多斯盆地/张夏组/颗粒滩/沉积特征/控制因素Key words
Ordos Basin/Zhangxia Formation/grain bank/sedimentary characteristics/controlling factor分类
天文与地球科学引用本文复制引用
王振,张元福,胡晨林,白一鸣,张博文,魏康强..鄂尔多斯盆地南部中寒武统张夏组颗粒滩沉积特征及控制因素[J].古地理学报,2018,20(2):219-230,12.基金项目
国家自然科学基金(编号:41572092),国家“十三五”科技重大专项(编号:2017ZX05009-002)联合资助.Co-funded by the National Natural Science Foundation of China (No.41572092) and the National Key Technologies R & D Program of China during the 13th Five-Year Plan Period(No.2017ZX05009-002) （编号:41572092）
