| 冈底斯新元古代-中生代沉积盆地演化 |
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| 引用本文： | 吴旌,徐亚东,安显银,孔令耀,罗亮,张克信.冈底斯新元古代-中生代沉积盆地演化[J].地球科学,2014,39(8):1052-1064. |
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| 作者姓名： | 吴旌 徐亚东 安显银 孔令耀 罗亮 张克信 |
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| 作者单位： | 1.中国地质大学生物地质与环境地质国家重点实验室, 湖北武汉 430074 |
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| 基金项目： | 中国地质调查局项目(Nos.1212010733802,12120113012500,1212011121261);生物地质与环境地质国家重点实验室自主研究课题(No.GBL11207);国家自然科学基金项目(No.41302279) |
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| 摘 要： | 青藏高原冈底斯地处印度河-雅鲁藏布江结合带和班公湖-双湖-怒江对接带之间, 其经历了复杂的沉积-岩浆演化史.将青藏高原冈底斯地层区划分为8个构造-地层分区, 并分时段对各个分区的沉积特征进行归纳, 总结了冈底斯从新元古代到中生代沉积盆地的发展与演化历史: 冈底斯震旦纪由陆缘裂谷开始演化; 晚古生代, 前期以稳定宽阔的碳酸盐岩沉积为主, 发育碳酸盐岩台地与台盆, 从石炭纪起, 开始转化为伸展性质的裂陷大陆边缘, 盆地类型主要为陆缘裂谷; 中生代, 班公湖-怒江特提斯洋向南与雅鲁藏布新特提斯洋向北双向俯冲, 大部分区域早期处于隆升状态, 中生代末期发育大型的岩浆弧带, 盆地类型以弧间盆地和弧前盆地为主.
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| 关 键 词： | 冈底斯 新元古代-中生代 沉积 构造 盆地演化 |
| 收稿时间： | 2014-05-03 |
Evolution of Neoproterozoic-Mesozoic Sedimentary Basins in Gangdese Area,Tibetan Plateau |
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| Abstract: | The Gangdese area is located in the middle of the Tibetan Plateau. Its southern boundary is the Indus River-Brahmaputra suture zone, and northern boundary is the Bangonghu-Shuanghu-Nujiang suture zone. It is a huge tectonic-magmatic belt, nearly east-west directed. The Gangdese is divided into eight tectonic-stratigraphic subregions in this paper. The sedimentary features of eight stratigraphic subregions in different periods are generalized from Neoproterozoic to Mesozoic, and the development and evolution of the sedimentary basins in Gangdese, Tibet plateau is explored. The following three stages of evolution are revealed: (1) the Gangdese started the evolution of continental-margin rift from Sinian; (2) it mainly developed carbonate sedimentary basins in the Late Paleozoic, featuring stable and broad development of carbonate platform and interplatform basins in this period. Gangdese started the development of rifted continental margin of stretch properties from Carboniferous, and the main sedimentary basins became continental-margin rift; (3) it was denuded in most areas from Early Mesozoic due to continental uplift. As Bangonghu-Nujiang Tethys's subduction towards north and Brahmaputra's subduction towards south, the Gangdese developed large magmatic arc belt at last in Late Mesozoic, and the main sedimentary basins changed to retroarc basin, interarc basin and forearc basin. |
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