古地理学报 ›› 2009, Vol. 11 ›› Issue (6): 629-640. doi: 10.7605/gdlxb.2009.06.003

• 岩相古地理学及沉积学 • 上一篇    下一篇

鄂尔多斯盆地上石炭统—中二叠统砂岩物源分析*

陈全红1 李文厚2 刘昊伟3 李克永4 庞军刚5 郭艳琴5 袁珍5   

  1. 1 中海石油研究中心,北京 100027
    2 西北大学地质学系,陕西西安 710069
    3 中国石油勘探开发研究院,北京 100083
    4 延安大学能源学院,陕西延安 716000
    5 西安石油大学油气资源学院,陕西西安 710065
  • 收稿日期:2009-04-21 修回日期:2009-06-27 出版日期:2009-12-01 发布日期:2009-12-01
  • 作者简介:陈全红,男,1975年生,2007年毕业于西北大学,获博士学位,现从事沉积学及石油地质学的研究工作。E-mail: allred@163.com。
  • 基金资助:
    国家重点基础研究发展计划(973计划)项目(编号:2003CB214602)资助

Provenance analysis of sandstone of the Upper Carboniferous to Middle Permian in Ordos Basin

Chen Quanhong1, Li Wenhou2, Liu Haowei3, Li Keyong4, Pang Jungang5, Guo Yanqin5, Yuan Zhen5   

  1. 1 CNOOC Research Center, Beijing 100027
    2 Geology Department of Northwest University, Xi'an 710069, Shaanxi
    3 Research Institute of Petroleum Exploration and Development, PetroChina,Beijing 100083
    4 College of Energy and Environmental Engineering, Yanan University, Yanan 716000,Shaanxi
    5 Institute of Oil and Gas Resources, Xi'an Shiyou University,Xi'an 710065,Shaanxi
  • Received:2009-04-21 Revised:2009-06-27 Online:2009-12-01 Published:2009-12-01
  • About author:Chen Quanhong, born in 1975, obtained his Ph.D. degree from Northwest University(Xian). Now he works in CNOOC, and is engaged in sedimentology and petroleum geology.

摘要: 对区域地质、地层接触关系、砂岩组分、重矿物及微量元素等的综合分析与研究结果表明,鄂尔多斯盆地北部上石炭统—中二叠统砂岩的物源区主要为再旋回造山带物源区,并可划分出乌海—银川、杭锦旗—东胜及准格尔旗—府谷3个物源区。受物源分异的影响,盆地内部石英砂岩分布以杭锦旗—东胜为界,具有明显的东西分区性。其中石英砂岩主要分布于盆地西部,古水流、重矿物及砂岩组分指示物源来自阿拉善古陆。而盆地东部总体上是岩屑砂岩的覆盖区,物源主要来自盆地北部和东北部阴山地区。盆地西南部及南部砂岩的物源区为克拉通地块和再旋回造山区,物源区与秦祁造山带的演化关系密切,具有稳定与活动的双重特性,可划分出海原、同心—中宁,平凉—固原、环县及耀县—宜君、富县3个主要物源区。南北物源汇水区在环县—富县—乡宁一带,呈北西西向狭长带状延伸,并从山西期—盒8期呈逐渐南移趋势。盆地西部物源到下石盒子组沉积时期才提供粗碎屑物质补给,以含有较多的长石石英砂岩为特征。周至柳叶河石炭—二叠系砂岩的物源区为再旋回造山带物源区和陆块物源区,为北秦岭造山带内山间盆地,属于盆地外缘,并与鄂尔多斯盆地呈连续过渡的关系。

关键词: 鄂尔多斯盆地, 石炭系, 二叠系, 物源分析, 汇水区

Abstract: Based on comprehensive study of regional geology, stratigraphic contact relations, sandstone fragment components, heavy mineral and trace elements, the Upper Carboniferous to Middle Permian provenance area for the north Ordos Basin mainly come from recycling orogeny area, and can be divided into three provenance areas that are Wuhai-Yinchuan, Hangjinqi-Dongsheng, Zhungeer-Fugu. But affected by variation provenance and bounded by Hangjinqi-Dongsheng, the distribution of quartz sandstone of Ordos Basin that was derived from Alashan ancient land has obvious west-east trending divisional feature and is mainly distributed in west Ordos Basin, but lithic sandstone that came from Yin Mountains mainly distributed in east Ordos Basin. South and southwest trending source sandstone that came from steady tectonic area and recycling orogeny area are strongly related to the evolution of Qin-Qi orogenic belt, and has the duplex characteristic of activity and stabilization. So the south provenance can be divided into three provenance areas that are Haiyuan and Tongxin-Zhongwei, Pingliang-Guyuan and Huaixian, Yaoxian-Yijun and Fuxian. The catchment area of south and north provenance with NWW trending shoestring extension is located in Huanxian-Fuxian-Xianning area, and the catchment area gradually transfers to south Ordos Basin during Shanxi to He-8 period. Until He-8 period, the west provenance began to supply coarse clastic sediments. In Liuyehe Basin, Zhouzhi, as the outer margin of Ordos Basin, which is the intermontane basin of Qinling orogenic belt and has continuous transitional relationship between them, the Upper Carboniferous to Middle Permian sandstone came from recycling orogeny area and continental blocks.

Key words: Ordos Basin, Carboniferous, Permian, provenance analysis, catchment area

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