|
|||||
|
|
| 南天山西部山前新生代晚期三期构造活动:来自乌鲁克恰提剖面砾石统计的证据 | |
| 引用本文： | 刘聃,陈汉林,林秀斌,Karl-Heinz WYRWOLL,Geoffrey E BATT,程晓敢,李康,王芳.南天山西部山前新生代晚期三期构造活动:来自乌鲁克恰提剖面砾石统计的证据[J].岩石学报,2012,28(8):2414-2422. |
| 作者姓名： | 刘聃 陈汉林 林秀斌 Karl-Heinz WYRWOLL Geoffrey E BATT 程晓敢 李康 王芳 |
| 作者单位： | 1. 浙江大学地球科学系,杭州310027;教育部含油气盆地构造研究中心,杭州310027 2. 澳大利亚西澳大学地球与环境学院,佩斯6009 3. 澳大利亚西澳大学地球与环境学院,佩斯6009;澳大利亚西澳大学John de Laeter同位素研究中心,佩斯6009 |
| 基金项目： | 本文受国家自然科学基金(40972138、41072154、41102128)、国家重大科技专项(2011ZX05009-001)和中央高校基本科研业务费专项资金联合资助 |
| 摘 要： | 天山是印度与欧亚板块碰撞过程中,欧亚大陆内重新复活的一条重要的造山带,其拓展过程一直备受关注.南天山西部山前新生代晚期巨厚的砾岩层为构造变形和磁性地层研究带来了困难,限制了该地区新生代晚期造山带拓展过程的研究.本文选取南天山西部山前乌鲁克恰提剖面,对新生代晚期的阿图什组和西域组地层进行详细的描述、测量,并对砾石出露点进行砾石统计.结果显示南天山西部山前乌鲁克恰提地区新生代晚期阿图什组存在3期沉积旋回,第一旋回由冲积扇远端、河流相变为该旋回上部的冲积扇扇中沉积环境.砾石统计结果显示由该旋回中部至上部砾石磨圆度变差、大粒径砾石增多.第二旋回沉积环境以较为平静的湖相及少许河流相开始,变为该旋回上部的冲积扇环境.砾石统计结果也显示出与第一旋回相似的变化特征,即由该旋回中部至上部砾石磨圆度变差、大粒径砾石增多.第三旋回下部为冲积扇远端、冲积扇扇中环境,上部变为扇根环境.砾石统计显示该旋回下部至上部,火成岩和变质岩等不稳定成分增多,磨圆度则呈现棱角状砾石显著增多的趋势,砾石粒径也明显增大.西域组则延续第三旋回的趋势,表现为山前快速堆积砾石沉积,砾石磨圆、分选呈显著变差趋势,粒径持续变大.从阿图什组第一旋回至西域组,砾石的磨圆度呈现变差的趋势,而粒径则表现为明显的增大趋势,这表明晚新生代(5.6Ma以来),褶皱冲断带不断向盆地拓展,物源区距离沉积区越来越近.这些结果表明南天山西部山前新生代晚期(5.6Ma以来)存在3期构造活动,为南天山山前晚新生代的多期拓展提供了证据. |
| 关 键 词： | 南天山 砾石统计 造山带拓展 乌鲁克恰提 |
| 收稿时间： | 2011/12/18 0:00:00 |
| 修稿时间： | 4/6/2012 12:00:00 AM |
Three episodes of tectonism in western South Tian Shan during Late Cenozoic: Evidences from gravel counting in Wulukeqiati sedimentary succession |
|
| LIU Dan,CHEN HanLin,LIN XiuBin,Karl-Heinz WYRWOLL,Geoffrey E BATT,CHENG XiaoGan,LI Kang and WANG Fang.Three episodes of tectonism in western South Tian Shan during Late Cenozoic: Evidences from gravel counting in Wulukeqiati sedimentary succession[J].Acta Petrologica Sinica,2012,28(8):2414-2422. | |
| Authors: | LIU Dan CHEN HanLin LIN XiuBin Karl-Heinz WYRWOLL Geoffrey E BATT CHENG XiaoGan LI Kang and WANG Fang |
| Institution: | Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;Research Center for Structures in Oil-and Gas-Bearing Basins, Ministry of Education, Hangzhou 310027, China;Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;Research Center for Structures in Oil-and Gas-Bearing Basins, Ministry of Education, Hangzhou 310027, China;Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;Research Center for Structures in Oil-and Gas-Bearing Basins, Ministry of Education, Hangzhou 310027, China;School of Earth and Environment, University of Western Australia, Stirling Highway, Crawley, Western Australia 6009, Australia;School of Earth and Environment, University of Western Australia, Stirling Highway, Crawley, Western Australia 6009, Australia;John de Laeter Centre of Isotope Research for the Earth and Environment, University of Western Australia, Crawley, Western Australia 6009, Australia;Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;Research Center for Structures in Oil-and Gas-Bearing Basins, Ministry of Education, Hangzhou 310027, China;Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;Research Center for Structures in Oil-and Gas-Bearing Basins, Ministry of Education, Hangzhou 310027, China;Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;Research Center for Structures in Oil-and Gas-Bearing Basins, Ministry of Education, Hangzhou 310027, China |
| Abstract: | |
| Keywords: | South Tian Shan Gravel counting Orogenic propagation Wulukeqiati |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《岩石学报》浏览原始摘要信息 | |
| 点击此处可从《岩石学报》下载免费的PDF全文 | |