鄂尔多斯盆地侏罗纪早中期甘陕古河的演化变迁

doi:10.11743/ogg20060203

Abstract

Abstract:

The Upper Triassic Yanchang Fm underwent denudation and incision of river valley to different degrees before the deposition of Lower and Middle Jurassic in Ordos basin due to the strong tectonic uplifting du-(ring) Indosinian movement,resulting in rolling paleotopography.Five major paleo-streams,including Gan-Shaan and Qingxi,were developed in early Jurassic'of which Gan-Shaan paeo-stream was the main stream channel.In the Gan-Shaan paleo-stream drainage area, the strata from Fuxian Fm to Yan'an Fm have different sedimentary and palaeogeographic characteristics,and they altogether reflect the structural and sedimentary evolution history of the basin.

Key words: Gan-Shaan paleo-stream, palaeogeomorphology, Fuxian Formation, Jurassic, Yan'an Formation, (Ordos) basin

CLC Number:

TE111.1

Zhao Junxing, Chen Hongde. Evolution of Gan-Shaan paleochannel during Early and Middle Jurassic in Ordos basin[J]. Oil & Gas Geology, 2006, 27(2): 152-158.

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Evolution of Gan-Shaan paleochannel during Early and Middle Jurassic in Ordos basin

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