| 西藏羌塘盆地的构造沉积特征及演化 |
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| 引用本文： | 和钟铧,李才,杨德明,陈光权.西藏羌塘盆地的构造沉积特征及演化[J].吉林大学学报(地球科学版),2000,30(4):347-352. |
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| 作者姓名： | 和钟铧 李才 杨德明 陈光权 |
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| 作者单位： | 1. 长春科技大学地球科学学院,吉林长春 130061
2. 辽河石油勘探局,辽宁盘锦 124010 |
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| 基金项目： | 中国石油天然气集团公司“九五”科技工程资助项目!(QZ-97-204102) |
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| 摘 要： | 西藏羌塘盆地是特提斯构造域内晚古生代—中生代海相复合盆地。经历了晚古生代板块构造演化阶段、中生代板块构造演化阶段和新生代抬升剥蚀阶段 ,形成了晚古生代大陆边缘盆地、中生代南羌塘被动大陆边缘和北羌塘弧后盆地以及晚侏罗世之后的构造地貌盆地。受多期构造运动作用 ,盆地从北向南形成了北缘冲褶带、北羌塘变形带、中央碰撞隆起带、南羌塘变形带和南缘冲断带五个构造单元。变形由坳陷边缘到中心逐渐减弱 ,侏罗山式褶皱样式 ,反映出盖层浅层滑脱的变形特征
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| 关 键 词： | 沉积建造 构造变形 构造演化 羌塘盆地 西藏 |
| 文章编号： | 1008-0058(2000)04-0347-06 |
| 修稿时间： | 2000年4月24日 |
THE TECTONIC-SEDIMENTARY FEATURE AND EVOLUTION OF QIANGTANG BASIN IN NORTHERN TIBET |
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| HE Zhong_hua ,LI Cai ,YANG De_ming ,CHEN Guang_quan.THE TECTONIC-SEDIMENTARY FEATURE AND EVOLUTION OF QIANGTANG BASIN IN NORTHERN TIBET[J].Journal of Jilin Unviersity:Earth Science Edition,2000,30(4):347-352. |
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| Authors: | HE Zhong_hua LI Cai YANG De_ming CHEN Guang_quan |
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| Institution: | HE Zhong_hua 1,LI Cai 1,YANG De_ming 1,CHEN Guang_quan 2 |
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| Abstract: | Qiangtang basin is a marine composite basin of Tethys domain in Tibet during late Paleozoic-Mesozoic period. It underwent three major stages (the late Paleozoic plate tectonic evoloution, Mesozoic plate tectonic evolution and Cenzoic uplift-denudation) and formed different basins, including continental margin basin in late Paleozoic, southern Qiangtang passive continental margin basin and northern Qiangtang back-arc basin in the Mesozoic, and tectonic-morphologic basin after late Jurassic. By the effict of multitectonic movements, from north to south Qiangtang basin can be divided into five tectonic units:northern margin thrust-fold belt, northern Qiangtang deformation belt, central collisional uplift belt, southern Qiangtang deformation belt and southern thrust-fault belt. The deformation is weaker from depression margin to centre. Jura-type fold style shows that the deofmation of covering strata is a kind of decollement in shallow level. |
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| Keywords: | sedimentary formation tectonic deformation tectonic evolution Qiangtang basin Tibet |
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