| 鄂尔多斯盆地奥陶纪中央古隆起水平迁移规律——来自于同沉积记录的证据 |
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| 引用本文： | 袁苏杭,付金华,肖安成,孙六一,吴磊,包洪平,毛黎光,欧阳征键,徐波.鄂尔多斯盆地奥陶纪中央古隆起水平迁移规律——来自于同沉积记录的证据[J].浙江大学学报(理学版),2014,41(1):100-107. |
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| 作者姓名： | 袁苏杭 付金华 肖安成 孙六一 吴磊 包洪平 毛黎光 欧阳征键 徐波 |
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| 作者单位： | 浙江大学地球科学系;教育部含油气盆地构造研究中心;中国石油长庆油田公司勘探开发研究院; |
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| 基金项目： | 国家“十二五”重大专项资助项目(2011zx05003-002,2011zx05009-001);中国石油天然气股份有限公司长庆油田分公司资助项目(H20110461) |
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| 摘 要： | 鄂尔多斯盆地奥陶纪中央古隆起是盆地内的重要油气聚集区，其成因一直是大家关注的热点.利用丰富的钻井资料对古隆起中东部地区中奥陶统马五段地层的沉积特征进行详细的分析，编制出了马五段各层段的厚度等值线图，圈出了各时期的沉降中心位置，发现在马五8~马五5时期，沉降中心基本以向南迁移为主，伴随着一定程度的向西迁移；在马五43到马五41时期，沉降中心以向西的迁移为主，伴随微弱的向南迁移.这种迁移过程支持鄂尔多斯盆地西、南缘在奥陶纪时发育双前陆盆地，“L”型中央古隆起是在早-中奥陶世时受该双前陆盆地前缘隆起相互叠加的影响.
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| 关 键 词： | 鄂尔多斯盆地 中央古隆起 奥陶纪 马家沟组 沉积特征 |
| 收稿时间： | 2013-01-16; |
Discussion of the horizontal migration of the Ordovician central Paleouplift in Ordos basin: Evidence from the synsedimentary record |
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| YUAN SuhangI＇,FU Jinhua,XIAO Anchen,＇,SUN Liuyiz,WU Lei,＇,BAO Hongping,MAO Liguang,＇,OUYANG Zhengjian,XU Bo.Discussion of the horizontal migration of the Ordovician central Paleouplift in Ordos basin: Evidence from the synsedimentary record[J].Journal of Zhejiang University(Sciences Edition),2014,41(1):100-107. |
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| Authors: | YUAN SuhangI＇ FU Jinhua XIAO Anchen ＇ SUN Liuyiz WU Lei ＇ BAO Hongping MAO Liguang ＇ OUYANG Zhengjian XU Bo |
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| Affiliation: | l＇z (1. Department of Earth Sciences, Zhejiang University, Hangzhou 310058, China ; 2. Research Center for Structures in Oil g Gas Bearing, Ministry of Education, Hangzhou 310058, Chi- na; 3. Research Institute of Exploration and Development, Changqing Oil Field Branch, Xi＇an 710021, China) |
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| Abstract: | The central paleo-uplift in the Ordos basin is an important hydrocarbon accumulation zone. How it formed is now a hot topic and attracting lots of attentions. In this paper, the sedimentary characteristics of the 5th unit of the middle Ordovician Majiagou Formation （M5） in the mid-eastern part of the paleo-uplift from drilling data are an- alyzed in detail and the isopach maps are compiled. Then the positions of the depocenter for each period are circled. It is found that the depocenter migrated mainly southward and weakly westward during the deposition of 8th~ 5＇h member of M5, while mainly westward and weakly southward during the deposition of 4th member of M5. These observations support that there were dual foreland basins in the southern and western margin of the Ordos basin dur- ing the Ordovician, and that the L shaped central paleo-uplift formed due to the superimposed effects of the fore- bulges of these two foreland basins during the early Ordovician. |
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| Keywords: | Ordos basin central paleouplift Ordovician Majiagou Formation sedimentary characteristics |
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