| 鄂尔多斯盆地甘泉地区下侏罗统高分辨率层序地层学分析 |
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| 引用本文： | 陈辉,戴小平,王起琮,熊涛,王永东.鄂尔多斯盆地甘泉地区下侏罗统高分辨率层序地层学分析[J].煤田地质与勘探,2007,35(2):10-14. |
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| 作者姓名： | 陈辉 戴小平 王起琮 熊涛 王永东 |
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| 作者单位： | 1. 吐哈石油勘探开发指挥部地质研究院, 新疆 哈密 839009; |
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| 基金项目： | 国家重点基础研究发展计划(973计划)
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陕西省自然科学基金 |
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| 摘 要： | 根据层序沉积时限以及基准面旋回界面识别标志,运用高分辨率层序地层学理论和方法,对鄂尔多斯盆地中南部甘泉地区下侏罗统进行了划分。识别出下侏罗统各级旋回层序界面,并将其划分为1个超长期、8个长期、32个中期、86个短期旋回层序。应用地层等时对比技术,以长期旋回层序为地层对比框架、中期旋回层序为地层对比单元,建立了研究区下侏罗统等时地层格架。下侏罗统沉积于盆地基底快速沉降、缓慢抬升的构造环境,在基底抬升速度周期性变化过程中,盆地边缘沉积了数层可采煤层,成为划分层序的重要依据。
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| 关 键 词： | 高分辨率层序地层 下侏罗统 甘泉地区 |
| 文章编号： | 1001-1986(2007)02-0010-04 |
| 收稿时间： | 2006-07-05 |
| 修稿时间： | 2006年7月5日 |
High-resolution sequence stratigraphy of Lower Jurassic in Ganquan area, Ordos Basin |
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| CHEN Hui,DAI Xiao-ping,WANG Qi-cong,XIONG Tao,WANG Yong-dong.High-resolution sequence stratigraphy of Lower Jurassic in Ganquan area, Ordos Basin[J].Coal Geology & Exploration,2007,35(2):10-14. |
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| Authors: | CHEN Hui DAI Xiao-ping WANG Qi-cong XIONG Tao WANG Yong-dong |
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| Institution: | 1. 1. Geological Research Institute, Headquarter of Petroleum Exploration and Development, Hami 839009, China;2. College of Oil and Gas Resource, Xi'an Shiyou University, Xi'an 710065, China;3. Yanchang Petroleum Cooperation, Zichang 717208, China |
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| Abstract: | The classification of high resolution sequence stratigraphy of Lower Jurassic in Ganquan area of Ordos Basin is discussed based on sequence deposition time and identification markers.According to interface types the Lower Jurassic sequences can be divided into 1 super-long-time base-level cycle sequence and 8 long time,32 middle long time,86 short time base-level cycle sequences.By using the technology of isochronous stratigraphic correlation of high resolution sequence stratigraphy the sequence framework is established with the framework of long time base-level cycle sequence and contrasting units of middle time baselevel cycle sequence.The Lower Jurassic in Ordos Basin formed while the basin base fast subsided then slowly uplifted and the coal seams accumulated at the basin margin,which are important evidence to recognize base-level cycle sequences. |
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| Keywords: | high resolution sequence stratigraphy Lower Jurassic Ganquan area |
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