| 柴达木盆地新生界碎屑锆石FT年龄对蚀源区的约束 |
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| 引用本文： | 高军平,彭杨宏,宋春晖,袁万明,李生喜.柴达木盆地新生界碎屑锆石FT年龄对蚀源区的约束[J].世界地质,2009,28(2):148-156. |
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| 作者姓名： | 高军平 彭杨宏 宋春晖 袁万明 李生喜 |
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| 作者单位： | 1. 兰州大学西部环境教育部重点实验室, 兰州730000; 2. 兰州大学资源环境学院, 兰州730000; 3. 中国地质大学地质过程与矿产资源国家重点实验室, 北京100083 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金委青年科学家群体研究项目，教育部科学研究重大项目 |
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| 摘 要： | 柴达木盆地新生界碎屑锆石裂变径迹年龄的研究表明, 沉积物主要蚀源区是遭受海西-印支运动影响的盆地周缘山地, 燕山运动仅在柴西阿尔金山有所表现。揭示出蚀源区发生过多次的(热) 构造运动, 在柴北缘有5次( ～284.5 Ma、～263.6 Ma、～243.6 Ma、～221.6 Ma和～199.8 Ma) , 而在柴西则有6次( ～344.2 Ma、～275.2 Ma、～244.9 - 246.8 Ma、～210 - 220.3 Ma、～186.9 - 195.7 Ma和～162.9 Ma) , 说明青藏高原北部在前新生代具有多阶段、同步整体隆升特点。进入新生代, 柴达木盆地及其周缘山带构造活动具有强-弱-强的特征。
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| 关 键 词： | 柴达木盆地 锆石裂变径迹 阿尔金断裂 沉积源区 构造热事件 |
Constraints of Cenozoic detrial zircon fission - track age to exhumation-provenance in Qaidam Basin |
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| GAO Jun-ping,PENG Yang-hong,SONG Chun-hui,YUAN Wan-ming,LI Sheng-xi.Constraints of Cenozoic detrial zircon fission - track age to exhumation-provenance in Qaidam Basin[J].World Geology,2009,28(2):148-156. |
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| Authors: | GAO Jun-ping PENG Yang-hong SONG Chun-hui YUAN Wan-ming LI Sheng-xi |
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| Institution: | 1. Key Laboratory of Western China's Environmental System of Ministry of Education, Lanzhou University, Lanzhou 730000, China; 2. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; 3. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | The study of Cenozoic detrial zircon fission track age in Qaidam Basin suggests that the sedimentary exhumation-provenance is the peripheric mountains of the basin which had undergone Hercynian-Indochina event, but Yanshan movement only rep resented in Altyn Tagh Mt. The facts reveal that multip le thermo - tectonic events had taken place in the provenance, for five times ( ～284.5 Ma, ～263.6 Ma, ～243.6 Ma, ～221.6 Ma and ～199.8Ma) in the north margin of the basin and for six times ( ～344.2 Ma, ～275.2 Ma, ～244.9 - 246.8 Ma, ～210 - 220.3 Ma, ～186.9 - 195.7 Ma and ～162.9 Ma) in the west of the basin, which indicates the north part of Tibet plateau characterized by multi-stage and synchronous uplifting before Cenozoic, and tectonic activities in Qaidam Basin and its periphery experienced strong-quiescent-strong stages in Cenozoic. |
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| Keywords: | Qaidam Basin zircon fission track Altyn Tagh fault sedimentary provenance thermo-tectonic event |
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