Study on the Sedimentary Tectonic Response of the Middle-Late Permian in the Northern Edge of Bogeda mountain
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1.School of Earth Sciences,China University of PetroleumBeijing,Beijing;2.Petroleum Institute,China University of PetroleumBeijing,Karamay Campus,Karamay,Xinjiang

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P542

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    Abstract:

    The northern edge of Bogeda Mountain is the key part of Junggar Basin and Tianshan orogenic belt, thus it is also the key area to study the basin relationship. Middle-Late Permian tectonic and deposition evolution still remain controversial. In this study, we combined sedimentological and geophysical methods such as field observation, microscopic identification of rock slices, granularity analysis experiment and seismic data analysis, to study Sedimentary types and evolution, Deformation and development characteristics of basin structure, and sedimentary tectonic response of Jingzigou section and Dalongkou section which in the east and west Bogeda Mountain. The research results indicate that the Middle Permian Wulabo Formation to Hongyanchi Formation were lacustrine facies deposition, while the Upper Quanzijie Formation was alluvial fan-fluvial facies deposition, and the Upper Guodikeng and Wutonggou Formation were shore-shallow lacustrine-delta facies deposition .There are two main structural layers in the study area, the lower structural layer is extensional fault depression as the main geological structure, and the upper structural layer is foreland thrust as the main structural deformation. Multiple phases of tectonic activities control the sedimentary evolution process of Permian Bogeda area. Under the background of compressional structure, the Middle Permian lacustrine facies deposition became the Upper Permian alluvial fan-fluvial facies deposition.And the tectonic activity became stable later, and the sedimentary facies turned to shore-shallow lacustrine-delta facies.

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History
  • Received:February 08,2023
  • Revised:May 26,2023
  • Adopted:May 29,2023
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