石油学报 ›› 2007, Vol. 28 ›› Issue (6): 6-11.DOI: 10.7623/syxb200706002

• 地质勘探 • 上一篇    下一篇

新近纪鄂尔多斯盆地东西部的构造反转及其意义

赵红格1, 刘池洋1, 翁望飞2, 桂小军1, 岳乐平1, 王建强1, 梁美艳3   

  1. 1. 西北大学大陆动力学国家重点实验室, 陕西西安, 710069;
    2. 中国石化江苏油田物探技术研究院, 江苏南京, 210000;
    3. 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室, 陕西西安, 710075
  • 收稿日期:2006-10-18 修回日期:2007-05-08 出版日期:2007-11-25 发布日期:2013-07-10
  • 作者简介:赵红格,女,1975年12月生,2003年获西北大学博士学位,现为西北大学地质系讲师,主要从事盆地构造分析与油气地质综合研究.E-mail:zhaohg_75@sina.com
  • 基金资助:
    国家重点基础研究发展规划(973)项目(2003CB214607);教育部长江学者和“油气盆地”创新团队发展计划项目(IRT0559)联合资助

Structural reverse and its significance to oil and gas in the east and west parts of Ordos Basin in the Neogene

Zhao Hongge1, Liu Chiyang1, Weng Wangfei2, Gui Xiaojun1, Yue Leping1, Wang Jianqiang1, Liang Meiyan3   

  1. 1. State Key Laboratory for Continental Dynamics, Northwest University, Xi'an 710069, China;
    2. Institute of Geophysical Prospecting, Sinopec Jiangsu Oilfield Company, Nanjing 210000, China;
    3. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China
  • Received:2006-10-18 Revised:2007-05-08 Online:2007-11-25 Published:2013-07-10

摘要: 对鄂尔多斯盆地东、西部中生界顶面上、下分布地层的综合分析表明,鄂尔多斯盆地东部中生界之上接受的新生代最老的地层为新近纪的红粘土,这种红粘土分布广泛,厚度较大,自西向东分别覆盖于下白垩统、中侏罗统安定组及直罗组、下-中侏罗统延安组和上三叠统延长组之上。由此推断,盆地东部由晚侏罗世以来的持续隆起转变为坳陷接受沉积的时间为新近纪红粘土开始沉积的时间。由其底部的磁性地层测年可知,其反转时间约为距今8Ma。而裂变径迹测试分析资料表明,盆地西部在距今8Ma左右发生了逆冲抬升,由中生代以来的持续坳陷反转为逆冲抬升并遭受剥蚀。故鄂尔多斯盆地东、西部在新近纪均发生了构造反转。此次的构造反转对盆地内油、气流体矿产产生了重要的影响。

关键词: 鄂尔多斯盆地, 新近纪, 红粘土, 裂变径迹年龄, 构造反转

Abstract: The analysis on the strata distribution upper and under the top surface of the Mesozoic showed that the Neogene red clay was widely distributed in the oldest Cenozoic strata deposited in the east part of Ordos Basin.The red clay had a great thickness and overlapped on the Lower Cretaceous,Anding Formation and Zhiluo Formation in the Middle Jurassic,Early-Mid Jurassic Yan'an Formation and Late Triassic Yanchang Formation,respectively.The magnetostratigraphy dating showed that there existed a reverse event in the east part of Ordos Basin at about 8 million years before present,and the east part of Ordos Basin turned from the continuous uplift to thrust in the deposition stage of red clay.The fission track dating data indicated that the west part of Ordos Basin also experienced a structural uplift.It is supposed that the reverse time is also about 8 million years before present.The structural reverse times of the east and west parts of the basin in the Neogene are synchronous,which has a great significance to the fluid deposits of oil and gas in Ordos Basin.

Key words: Ordos Basin, Neogene, red clay, fission track age, structural reverse

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