Structural Transform Zone and Its Control of Mesozoic Deposits in Northwestern Margin of Junggar Basin

Abstract

Abstract: The foreland thrust zone in northwestern margin of Junggar basin could be divided into three fault zones: Hongshanzui-Chepaizi fault zone in the southwest, Karamay-Baikouquan fault zone in the central part and Wuerhe-Xiazijie fault zone in the northeast. There are two transform zones between neighboring fault zones which have the function of adjusting displacement and transferring deformation. The effects of the transform zones on Mesozoic sediments assume that compared with major fault zones, the sedimentary types developed in the transform zones are more abundant, characterized by more coarse sand grains, larger single-layer thickness, stable lateral distribution and far prograding distance. Hence, the sand bodies tend to enrichment along transfer slopes and transform faults, which could form large scale premium reservoirs.

Key words: Junggar basin, northwestern margin, structural transform zone, sedimentary feature, Mesozoic

CLC Number:

TE111.3

QI Li-qi, BAO Zhi-dong, XIAN Ben-zhong, HUANG Zheng. Structural Transform Zone and Its Control of Mesozoic Deposits in Northwestern Margin of Junggar Basin[J]. Xinjiang Petroleum Geology, 2009, 30(1): 29-32.

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