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| 青藏高原羌塘盆地基底结构与南北向变化——基于一条270km反射地震剖面的认识 | |
| 引用本文： | 卢占武,高锐,李永铁,李秋生,王海燕,匡朝阳,酆少英,熊小松.青藏高原羌塘盆地基底结构与南北向变化——基于一条270km反射地震剖面的认识[J].岩石学报,2011,27(11):3319-3327. |
| 作者姓名： | 卢占武 高锐 李永铁 李秋生 王海燕 匡朝阳 酆少英 熊小松 |
| 作者单位： | 1. 中国地质科学院地质研究所,大陆构造与动力学国家重点实验室,北京100037;中国地质科学院深部探测与地球动力学重点开放实验室,北京100037 2. 中国石油勘探开发研究院,北京,100083 3. 中国石化华东石油局第六物探大队,南京,210007 4. 中国地震局地球物理勘探中心,郑州,450002 |
| 基金项目： | 本文受国家深部探测专项(SinoProbe-02-01, 02-06)、国土资源部公益性行业科研专项(201011040、201011045、200811021)、国土资源部油气专项(XQ2004-06)、国家自然科学基金委创新群体项目(40921001)和国家自然科学基金项目(40830316、40874045)联合资助. |
| 摘 要： | 通过收集并重新处理已有的反射地震剖面,获得了一条南北向横贯羌塘盆地主体的270km长反射地震剖面.剖面显示；羌塘盆地可能具有元古代的基底并且南羌塘盆地较北羌塘盆地深.在南、北羌塘地壳浅部(约0～3s)变形差异较大,北羌塘褶皱变形强烈,呈现出隆凹变形相间的格局,南羌塘则相对较平缓.羌塘中央隆起之下为连贯的弧形反射,其北侧发育一个深度达8km的半地堑构造,规模较大,可为油气资源储存提供有利空间. |
| 关 键 词： | 羌塘盆地 基底结构 南北向变化 反射地震剖面 |
| 收稿时间： | 4/1/2011 12:00:00 AM |
| 修稿时间： | 2011/6/24 0:00:00 |
Structure of basement and its N-S direction transformation in Qiangtang basin in Tibet: Discovered by a 270km seismic reflection profile. |
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| LU ZhanWu,GAO Rui,LI YongTie,LI QiuSheng,WANG HaiYan,KUANG ChaoYang,FENG ShaoYing and XIONG XiaoSong.Structure of basement and its N-S direction transformation in Qiangtang basin in Tibet: Discovered by a 270km seismic reflection profile.[J].Acta Petrologica Sinica,2011,27(11):3319-3327. | |
| Authors: | LU ZhanWu GAO Rui LI YongTie LI QiuSheng WANG HaiYan KUANG ChaoYang FENG ShaoYing and XIONG XiaoSong |
| Institution: | State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory of CAGS, Beijing 100037, China;State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory of CAGS, Beijing 100037, China;Exploration and Development Academy of CNPC, Beijing 100083, China;State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory of CAGS, Beijing 100037, China;State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory of CAGS, Beijing 100037, China;No.6 Geophysical Prospecting Team, East China Petroleum Bureau, SINOPEC, Nanjing 210007, China;Geophysical Exploration Centre of China Earthquake Administration, Zhengzhou 450002, China;State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Earthprobe and Geodynamics Open Laboratory of CAGS, Beijing 100037, China |
| Abstract: | By collecting and reprocessing current reflection seismic profiles, we get a 270km profile across the Qiangtang basin at S-N direction. Profile shows: there are probably Proterozoic basement in Qiangtang basin. The depth of the basement is changeable; it is deeper in South Qiangtang basin and shallower in North Qiangtang basin. Shallow crustal deformations (about 0~3s) are quite different between North Qiangtang and South Qiangtang. In North Qiangtang, there are strong fold deformations and alternating uplifts and depressions, and relatively flat in South Qiangtang. Continuous arc reflections were found beneath the central uplift of the Qiangtang terrane. There is an 8km-depth half graben on the north side where may be a benefit storage space for oil and gas resources. |
| Keywords: | Qiangtang basin Basement structure N-S transformation Seismic reflection profile |
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