| 西藏措勤盆地的上古生界-下中生界：潜在的油气沉积建造 |
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| 引用本文： | 纪占胜,姚建新,武桂春.西藏措勤盆地的上古生界-下中生界：潜在的油气沉积建造[J].中国区域地质,2008(1):36-63. |
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| 作者姓名： | 纪占胜 姚建新 武桂春 |
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| 作者单位： | 中国地质科学院地质研究所,北京100037 |
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| 基金项目： | 国家自然科学基金项目（编号：40772023,40502004和40572018）,中国地质调查局项目（编号：200313000054、1212010561605和1212010611702）、中石化项目《藏北戈木错盆地及其相关地区基本石油地质条件研究》和中国地质科学院地质研究所项目《西藏措勤盆地中二叠统一下侏罗统古生物研究》资助.;致谢：中国地质科学院地质研究所肖序常院士审阅了本文并提出宝贵的意见.与王乃文研究员的讨论使笔者获益匪浅.匿名评审专家的建设性意见促使笔者补充了大量的相关资料.在青藏高原的地质调查过程中.一直得到中国地质调查局拉萨工作站和西藏自治区国土资源厅地质培训中心的领导和同志的帮助.参加野外工作的还有中国地质调查局实物资料中心蒋忠惕研究员、吉林省地质调查研究院刘贵忠高级工程师和原中国地质大学（北京）的傅渊慧硕士.在此一并表示诚挚的感谢! |
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| 摘 要： | 新的地层和古生物学研究结果表明，措勤盆地在晚古生代一早中生代不存在长达75Ma以上的沉积间断．其中，晚二叠世-晚三叠世诺利期都是海相碳酸盐岩地层，晚三叠世瑞替期-早中侏罗世为陆缘碎屑岩地层．两者之间为角度不整合接触．措勤盆地在晚二叠世-晚三叠世诺利期一直处于海相碳酸盐岩盆地中．晚三叠世瑞替期-早中侏罗世仍然是接受巨厚沉积的低洼地区。从宏观的油气勘探的战略评价角度看．措勤盆地在中二叠世栖霞期-晚三叠世诺利期的海相碳酸盐岩地层具有生油层的性质，上三叠统瑞替阶-中下侏罗统具有盖层的性质，两者之间的角度不整合具有储集层的性质。措勤盆地中二叠统-下侏罗统构成一个油气的有利勘探层系．称为古格层系。
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| 关 键 词： | 西藏 措勤盆地 上古生界 下中生界 古格层系 互换构造域 油气勘探 |
Upper Paleozoic-Lower Mesozoic in the Coqen basin,Tibet, China： A potential petroleum-bear-ing sedimentary sequence |
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| jI Zhan-sheng,YAO Jian-xin,WU Gui-chun.Upper Paleozoic-Lower Mesozoic in the Coqen basin,Tibet, China： A potential petroleum-bear-ing sedimentary sequence[J].Regional Geology of China,2008(1):36-63. |
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| Authors: | jI Zhan-sheng YAO Jian-xin WU Gui-chun |
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| Institution: | (Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China) |
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| Abstract: | The latest stratigraphic and paleontological studies indicate that in the Coqen basin there was no 〉75 Ma sedimentary hiatus during the Late Paleozoic-Early Mesozoic. Among the deposits, marine carbonate rocks were deposited during the Late Permian to Late Triassic Norian and continental-margin clastic rocks were deposited during the Late Triassic Rhetian to Early-Middle Jurassic. They are in unconformable contact. The Coqen basin was a marine carbonate basin during the Late Permian to Late Triassic Norian and still a low-lying area that received very thick deposits during the Late Triassic Rhetian to Early-Middle Jurassic. In the context of the strategic evaluation of macroscopic petroleum exploration, the Middle Permian Qixiaan to Late Triassic Norian carbonate rocks in the basin have the properties of source rocks and the Late Triassic Rhetian to Early-Mid Jurassic clastic rocks have the properties of cover rocks; the unconformity between them has the properties of reservoir rocks. The Middle Permian-Lower Jurassic in the Coqen basin form a favorable sequence for petroleum exploration, which is named the Guge sequence. |
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| Keywords: | Tibet Coqen basin Upper Paleozoic Lower Mesozoic Guge sequence interchange tectonic domain petroleum exploration |
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