鄂尔多斯盆地上三叠统延长组长10油层组沉积特征及物源<sup>*</sup>

doi:10.7605/gdlxb.2018.05.055

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Abstract

The Upper Triassic Yanchang Formation was developed within a large depression basin deposits in the Ordos Basin. Chang 10 interval is the initial deposits of Yanchang Formation. However,its source characteristics,the division of sedimentary system and the type of sedimentary facies remain obscure,which,in turn,restricts the exploration and discovery of the Chang 10 interval in the Ordos Basin. Heavy and light minerals,together with zircon dating,suggest that three main provenances developed in the northeast,northwest and southwest of the Chang 10 interval in Ordos Basin. The sedimentary systems were divided into the northeast,northwest and southwest depositional systems,on the basis of the source characteristics. Comprehensive outcrop,core,drilling,logging and other data reveal that Chang 10 interval mainly contains fluvial and deltaic deposits. The northwestern depositional system is mainly composed of braided river deposits,while the northeastern depositional system is typified by meandering rivers and delta deposits. The southwestern depositional system is represented by braiding river deltas,with sedimentary center located in Taibai Yijun areas(mostly shallow lacustrine facies).

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	Articles by authors
	Li Yuan-Hao
	Guo Xiao-Jun
	Liang Yan
	Bai Chang-E
	Wang Ke

Key words： Ordos Basin Upper Triassic Yanchang Formation Chang 10 interval provenance analysis sedimentary system Zircon dating

Received: 22 December 2017

ZTFLH:

P588.21

Fund:

National Science and Technology Major Project of China “A demonstration project for the development of large low permeability lithostratigraphic reservoirs in Ordos Basin”(No.2016ZX05050006)

About author: Li Yuan-Hao,born in 1976,assistant professor, graduated with a Msc. degree from China University of Petroleum(East China)in 2002,graduated with a Dr. degree from Northwest University in 2008. Now he is mainly in integrated research on petroleum geology in Xi'an Shiyou University. E-mail: liyuanh@xsyu.edu.cn.

Cite this article:

Li Yuan-Hao,Guo Xiao-Jun,Liang Yan et al. Sedimentary characteristics and provenance of the Chang 10 interval of Upper Triassic Yanchang Formation in Ordos Basin[J]. JOPC, 2018, 20(5): 787-802.

URL:

http://journal09.magtechjournal.com/gdlxb/EN/10.7605/gdlxb.2018.05.055 OR http://journal09.magtechjournal.com/gdlxb/EN/Y2018/V20/I5/787

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