库车褶皱冲断带西段盐底辟成因机制

Abstract

Abstract:

Kuqafold thrust belt (KFTB) is a Cenozoic rebuilt foreland basin formed by the collision between Indian and Eurasian plate. Kumugeliem Group (K. G.) and Jidike Formation (J. F.) salt was sedimented during Paleogene and Neogenere spectively and salt diapir was developed in the west of KFTB.Field survey, seismic profile interpretation and balanced section were analysed for the mechanism research of salt diapir. Two types of salt diapirs were recognized in the west of KFTB. One is the salt stock developing along Kalayuergun strike-slip fault and the other is the salt wall located in the Tuzimaza area. The growth stratigraphy of the west KFTB was mainly developed in the middle of Kuqa Formation and its upper layers. The unconformity was developed in the middle of Kuqa Formation, showing the development of the salt wall. The salt stock is controlled by the strike-slip;and the tensional stress component of strike-slip caused the salt extruding to the surface. The salt wall is controlled by the sediment differential loading. The huge different sediment thickness made the salt star to develop. The salt wall continued to develop in the later period and the infected by the thrust fault.

Key words: salt diapirs, growth stratigraphy, unconformity, mechanism, Kuqa fold thrust belt

CLC Number:

P618.4

Cheng Haiyan. Salt Diapirs and Its Mechanism in the West of Kuqa Fold Thrust Belt, Northwest China[J].Journal of Jilin University(Earth Science Edition), 2014, 44(4): 1134-1141.

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Salt Diapirs and Its Mechanism in the West of Kuqa Fold Thrust Belt, Northwest China

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