Delineation of the Unconformity Horizon in Upper Jurassic in Jiergelehe Area of Wusu,Xinjiang, China

Abstract

Abstract: There exists a huge unconformity of Upper Jurassic in Tuositai-Jiergelehe area, which was initially classified as the bottom boundary of Qigu formation of Upper Jurassic. But it has been classified as the bottom boundary of Toutunhe formation of Middle Jurassic, and these two formations can not be divided into sub-formations. This paper confirms that the present delineation of the unconformity is a mistake, based on the results from near three-year repetitive investigations. It is concluded that this unconformity does exist between the bottom of Qigu formation and the top of Toutunhe formation.

Key words: Jiergelehe area, Upper Jurassic, unconformity, horizon, delineation

CLC Number:

TE111.3

PENG Xi-ling, YUAN Wen-xian, LIU Zhao-rong, LAI Shi-xin, HU Bin. Delineation of the Unconformity Horizon in Upper Jurassic in Jiergelehe Area of Wusu,Xinjiang, China[J]. Xinjiang Petroleum Geology, 2008, 29(4): 452-456.

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Delineation of the Unconformity Horizon in Upper Jurassic in Jiergelehe Area of Wusu,Xinjiang, China

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