羌塘盆地褶皱变形特征、定型时间及其与油气的关系

doi:10.11743/ogg20080301

Abstract

Abstract:

Qiangtang basin is the largest and most prospective petroliferous basin in Qianghai-Tibet plateau.Its surface fold buildings mostly occur in zonal distribution within the Jurassic structural layer,and are dominated by EW-NWW trending upright horizontal folds in pseudo-ejective assemblages.The deformation mechanisms of folds were controlled by compression,strike-slip,and basal structures.Nevertheless,the orogeny along the NS-trending suture zone was the dominant dynamics factors that controlled the geometry,styles and spatial distribution of the folds in the basin.The large folds in the Jurassic structural layer were formed during the Late Jurassic-Early Cretaceous and their temporal and spatial relationships with the generation,migration and accumulation of hydrocarbons from the major source rocks were favorable for hydrocarbon pooling.Therefore,they are favorable trap structures.

Key words: oil and gas accumulation, fold, Qiangtang Basin, Qianghai-Tibet Plateau

CLC Number:

TE121.1

Li Yalin, Wang Chengshan, Huang Jijun. Deformation characteristics and finalizing age of the folds in the Qiangtang Basin and their relations to oil and gas accumulation[J]. Oil & Gas Geology, 2008, 29(3): 283-289,296.

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Deformation characteristics and finalizing age of the folds in the Qiangtang Basin and their relations to oil and gas accumulation

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