塔里木盆地巴楚隆起寒武系层序及岩相古地理

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (4): 344-348.

塔里木盆地巴楚隆起寒武系层序及岩相古地理

祝贺^a,b, 刘家铎^a,b, 孟万斌^a, 杨永剑^b

成都理工大学 a.油气藏地质及开发工程国家重点实验室;b.沉积地质研究院,成都 610059

收稿日期:2010-01-11 修回日期:2010-01-11 发布日期:2020-10-19
作者简介:祝贺(1982-),男,新疆伊宁人,在读博士研究生,沉积学,(Tel)13550085610(E-mail)zhuhe19821119@126.com.

The Cambrian Sequence and Lithofacies Paleogeography in Bachu Uplift in Tarim Basin

ZHU He^a,b, LIU Jia-duo^a,b, MENG Wan-bin^a, YANG Yong-jian^b

CHENgdu University of Technology, a. State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, b. Research Institute of Sedimentary Geology, CHENgdu, Sichuan 610059, China

Received:2010-01-11 Revised:2010-01-11 Published:2020-10-19

摘要/Abstract

摘要： 分析沉积相和层序界面识别后,将巴楚隆起区寒武系划分为2 个二级层序(SS1和SS2)及14 个三级层序。每个二级层序又分为海侵体系域(TST)和高位体系域(HST)。研究表明,SS1-TST 发育时期,区内地壳下降,相对海平面快速上升,本区接受一套深水盆地相沉积;SS1-HST 发育时期,受海平面大幅度下降、水循环受限和干旱炎热气候影响,区域沉积格局由盆地直接向局限台地转化,最终进入频繁暴露的蒸发台地环境,以沉积膏云岩和膏岩为主,形成一套重要的区域性致密盖层;SS2发育时期,又经历了一次大规模的海平面升降旋回,形成开阔台地-局限台地-开阔台地相带的展布格局。

关键词: 巴楚隆起, 寒武系, 层序-岩相古地理, 盖层

Abstract: Based on the sequence interface identification and sedimentary facies analysis, the Cambrian in Buchu uplift in Tarim basin can be divided into 2 second-order sequences (SS1 and SS2) and 14 third-order sequences. Each second-order sequence consists of transgressive system tract (TST) and highstand system tract (HTS). It is indicated that during the development of SS1-TST, a set of deepwater basin-facies deposit develops in this area with crust subsidence, relative sea-level quick raising; during the development of SS1-HST, the regional sedimentary framework transforms from basin to restricted platform and finally enters into open and evaporating environment influenced by lowing sea level, restricted water cycle and dry-hot climate, dominated by gypsodolomite and gypsite. Thus a set of important regional dense cap rocks is formed; as the development of SS2, a large scale of sea-level ascending-descending cycle occurs, as a result a framework of open platform-restricted platform-open platform is shaped.

Key words: Buchu uplift, Cambrian, sequence-lithofacies paleogeography, cap rock

中图分类号:

TE1113
P531

祝贺, 刘家铎, 孟万斌, 杨永剑. 塔里木盆地巴楚隆起寒武系层序及岩相古地理[J]. 新疆石油地质, 2010, 31(4): 344-348.

ZHU He, LIU Jia-duo, MENG Wan-bin, YANG Yong-jian. The Cambrian Sequence and Lithofacies Paleogeography in Bachu Uplift in Tarim Basin[J]. Xinjiang Petroleum Geology, 2010, 31(4): 344-348.

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