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2011•Yunnan GeologyRequires access

A STUDY OF THE SEDIMENT SYSTEM OF MIDDLE JURASSIC QIANFOYA FORMATION OF FORELAND BASIN IN WEST SICHUAN

Yi Han Zeng

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Abstract

In the region of Qianfoya Formation,alluvial fan,meander river,delta and lacustrine deposits are developed.And in the meander river area,there are 2 developed subfacies of flood plain and river channel.In the delta area,3 subfacies of delta front,delta plain and fore-delta.In the lacustrine facies area,there are 2 developed subfacies of shallow lake and lakeside.The alluvial fan facies can be divided into 2 subfacies of midfan and fan-end.The periodic nappe structure movement is the main control factor of sedimentation and stratigraphic sequence development in West Sichuan foreland basin.

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What this paper is about

In the region of Qianfoya Formation,alluvial fan,meander river,delta and lacustrine deposits are developed.And in the meander river area,there are 2 developed subfacies of flood plain and river channel.In the delta area,3 subfacies of delta front,delta plain and fore-delta.In the lacustrine facies area,there are 2 developed subfacies of shallow lake and lakeside.The alluvial fan facies can be divided into 2 subfacies of midfan and fan-end.The periodic nappe structure movement is the main control factor of sedimentation and stratigraphic sequence development in West Sichuan foreland basin.

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Available abstract

In the region of Qianfoya Formation,alluvial fan,meander river,delta and lacustrine deposits are developed.And in the meander river area,there are 2 developed subfacies of flood plain and river channel.In the delta area,3 subfacies of delta front,delta plain and fore-delta.In the lacustrine facies area,there are 2 developed subfacies of shallow lake and lakeside.The alluvial fan facies can be divided into 2 subfacies of midfan and fan-end.The periodic nappe structure movement is the main control factor of sedimentation and stratigraphic sequence development in West Sichuan foreland basin.

Key concepts: Geology, Foreland basin, Facies, Meander (mathematics), Delta, Alluvium, Alluvial fan, Geomorphology

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