新疆石油地质

新疆石油地质 ›› 1992, Vol. 13 ›› Issue (3): 206-216.

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准噶尔盆地西北缘三叠—侏罗系沉积模式

张继庆, 江新胜, 刘志刚, 赵玉光, 王龙嶂, 罗建玲, 刘振宇   

  1. 中国地质科学院成都地矿所 四川 610082
  • 收稿日期:1992-07-01 出版日期:1992-09-01 发布日期:2020-07-21

SEDIMENTATION MODEL FOR THE TRIASSIC AND JURASSIC STRATA OF THE NORTHWESTERN MARGIN IN JUNGGAR BASIN

Zhang Jiqing, Jiang Xinsheng, Liu Zhigang, Zhao Yuguang, Wang Longzhang, Luo Jianling, Liu Zhenyu   

  1. Chengdu Geology and Minerals Institute, Geologica Academia Sinica, Sichuan 610082
  • Received:1992-07-01 Online:1992-09-01 Published:2020-07-21

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摘要： 本文根据584口探井资料结合现代沉积考察成果,对准噶尔盆地西北缘三叠—侏罗系沉积特征进行了研究,并在此基础上建立了各层相应的沉积模式:下三叠统百口泉组为早地、半旱地—瓣状河—曲流河—湖盆三角洲—湖沉积体系;中三叠统克拉玛依组为断崖扇—扇三角洲或瓣状三角洲—湖沉积体系;上三叠统白碱滩组为扇三角洲—湖及湖底扇沉积体系;下侏罗统八道湾组为湿地扇—砾质网状河—网状河泛滥平原沉积体系。

关键词: 准噶尔盆地西北缘, 沉积模式, 断崖扇, 湿地扇, 辫状河, 三角洲, 泛滥平原

Abstract: Based on the data from 584 wild cats anđ the reconnaissance/survey results about recent sediments of the north-western margin in Junggar Basin, the sedimentary characteristics of its Triassic and Jurassic strata have been studied, on which appropriate sedimentation models layer by layer have been developed as follows:
Baikouquan formation of Lower Triassic(T1) could be a sequence of arid iand/semiarid land—braided river—meander river—lake basin delta—lacustrine deposit; Karamay formation of Middle Triassic(T2) could be a sequence of cliff fan of displacement—fan delta or braided delta—lacustrine deposit; Baijiantan formation of Upper Triassic (T3) could be a sequence of fan delta—lake and lake—bottom fan deposit; while Badaowan formation of lower Jurassic (J1) could be a sequence of humid fan—rudaceous/tophaceous braided stream—flood plain of the stream deposit.

Key words: Sedimentation model, Northwestern margin in Junggar Basin, Cliff fan of displacement, Humid fan, Braided river, Delta, Flood plain