沉积学报2017，Vol.35Issue(3)：540-551,12.DOI:10.14027/j.cnki.cjxb.2017.03.012
鄂尔多斯盆地东南部山2段物源与曲流河三角洲沉积体系
The Study on Provenance and Meandering River Delta System of Shan 2 Member in Southeastern Ordos Basin
摘要
Abstract
Shan 2 Member in southeastern Ordos Basin is an important gas bearing stratum.The provenance system is analyzed based on heavy mineral distribution, sandstone composition, rock fragments type and cathodoluminescence characteristics.The sediments of Shan 2 Member mainly comes from the north and south source areas.The sorting of the sediments is moderately to well sorted and rounded.Trough cross bedding, parallel bedding and wave ripples mainly developed in Shan 2 Member, the sedimentary facies of Shan 2 Member is a meandering river delta front based on sedimentary texture and sedimentary structures.The sediments of Shan 2 Member is dominated by saltation and featured by 3 sections and 4 sections while the mouth bar is characterized by well sorted sediments and 2 sections and 3 sections grain size distribution patterns.The sandstone thickness in the south, north and central areas like Zhidan and Ganquan is large.The fluvial sandstone body is characterized by an asymmetric type and stacking pattern.The hydrodynamic condition is moderate to strong.Based on provenance system reconstruction, sedimentary features analysis and identification of thin sections, the sedimentary model of Shan 2 Member which is double sourced meandering river delta is established, which provides a theoretical support for gas exploration and exploitation.关键词
曲流河三角洲/物源/沉积模式/山2段/鄂尔多斯盆地东南部Key words
meandering river delta/provenance/depositional model/Shan 2 Member/southeastern Ordos Basin分类
天文与地球科学引用本文复制引用
李亚龙,于兴河,周进松,单新,韩小琴,史新,胡鹏..鄂尔多斯盆地东南部山2段物源与曲流河三角洲沉积体系[J].沉积学报,2017,35(3):540-551,12.基金项目
国家自然科学基金项目(41472091)[National Nature Science Foundation of China, No.41472091] （41472091）
