| 西天山中新生代古高程恢复研究 |
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| 引用本文：张文高,陈正乐.2017.西天山中新生代古高程恢复研究[J].地球学报,38(s1):69-72. |
| DOI：10.3975/cagsb.2017.s1.18 |
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| 基金项目:国家自然科学基金新疆联合重点基金项目(编号: U1403292); 国家科技支撑计划项目(编号: 2015BAB05B04); 中国地质调查局地质调查工作项目(编号: DD2016053) |
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| 中文摘要:横亘中亚的天山山脉是全球大陆中的一条重要构造带, 其绵延超过2 500 km, 总体上呈近东西向延伸, 与昆仑山—阿尔金山、阿尔泰山和塔里木盆地、准噶尔盆地共同构成了“三山夹两盆”的独特构造地貌格局。天山造山带在早二叠世期间开始解体, 三叠纪遭受区域剥蚀夷平, 侏罗纪由于板内伸展形成一系列伸展盆地, 新近纪以来天山地区发生强烈的陆内变形作用。因此, 中新生代天山造山带的隆升不仅受控于新生代印度与欧亚两个大陆强烈碰撞产生的远距离效应, 还受控于古生代板块俯冲与碰撞造山作用所形成的基底构造的制约。天山新生代的隆升与剥露历史, 是研究亚洲大陆内部造山带的运动学和动力学过程的重要途径之一, 通过相应的野外调查和测试手段, 对天山的中新生代古高程进行恢复, 对于天山地区新生代以来的气候、矿产保存以及反演印亚碰撞的远程效应方面都具有明显的意义。 |
| 中文关键词:氧同位素古高程计 熔岩流气泡古高程计 低温热年代学 砾石成分 古高程变化历史 中新生代 西天山 |
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| Study on the Reconstruction of Mesozoic–Cenozoic Paleoelevation in the Western Tianshan |
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| Abstract:The Tianshan mountain is located in the middle part of the Central Asian orogenic belt, stretching for nearly 2 500 km from the east to the west as a whole. The formation of the modern Tianshan is not only directly related to the plate subduction and collision orogenesis in Paleozoic, but also influenced by the far-distance effect of Indian-Asian collision in Ceno-zoic. The Cenozoic uplift and exhumation history of the Tianshan Mountain can help us to study the kine-matic and dynamic processes of orogenic belt inside Asian continent. In order to better understand how and when the topography of modern Tianshan was build, this study on reconstruction of paleoelevation in Sikeshu drainage basin, Tuoyun basin, north and mid-dle part of west Tianshan. In addition, from the study of structure deformation and sedimentation in fore-land basin, we discuss the the history of the Meso-zoic-Cenozoic paleoelevation in different parts of west Tianshan mountion. |
| keywords:oxygen isotope vesicular-basalt apatite fission track pebble components paleoelevation Mesozoic–Cenozoic Western Tianshan |
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