Lithofacies and Depositional Environments of the Kalataer Formation, Paleogene, Southwest Tarim Basin

详细信息   

• 责任者：Yang Haijun (Exploration and Development Research Institute ; Tarim Oilfield Company ; Korla 841000 ; China) ; Wang Jianpo
• 刊名：Journal of Stratigraphy
• 出版年：2011
• 卷期：35(2)
• 关键词：古近纪 ; Paleogene ; 沉积环境 ; sedimentary environment ; 塔里木盆地 ; Tarim Basin
• 页码：p.129-138
• 图表：3 illus., 2 tables, 45 refs.
• 分类号：1200
• 出版序号：1131
• issnNo：ISSN0253-4959
• isbnNo：CN32-1187/P

摘要

///The Paleogene Kalataer Formation widely outcrops at the front of South Tianshan Mountains and Kunlun Mountains, Southwest Tarim. The deposition of the Kalataer Formation marks a transgression. Carbonate sedimentation in arid climate conditions and siliciclastic influx from ancient rivers led to a range of lithofacies including carbonates (such as shell limestones, bioclastic limestons and oolitic limestones), argillaceous rocks (such as calcareous mudstones and silty mudstones), siliciclastic rocks (such as calcareous sandstones and calcareous siltstones) and evaporites. Rock assemblages with different composition in different regions reflect a depositional system ranging from alluvial fan to neritic shelf, which can be divided into two main depositional facies: the interaction of these two facies led to a mixture of siliciclastic-carbonate sediments. The controlling factors are tectonic activities, sea level change, and storm events, paleoclimates, and source areas; hydrodynamic conditions seems to have exerted a limited control on the mixing of carbonate and siliciclastic sediments.