收藏本站
《中国科学院地质与地球物理研究所2008学术论文汇编》 2009年
收藏 | 手机打开
二维码
手机客户端打开本文

Vertical-axis bending of the Altyn Tagh belt along the Altyn Tagh fault:Evidence from late Cenozoic deformation within and around the Xorkol Basin

Erchie Wang  
【摘要】:正The Altyn Tagh fault is one of the largest intracontinental strike-slip faults in the world,extending linearly~1500 km along the northern edge of the Tibetan Plateau. All tectonic units bounded by the fault on the south,such as the Qaidam Basin and the Qilian Shan thrust belt,have experienced intensive shortening and uplift due to transfer motion from the Altyn Tagh.However,the questions as to whether the tectonic units north of the Altyn Tagh fault have experienced associated deformation and whether the Altyn Tagh fault itself has experienced deformation remain unexplored. Our field study shows that the middle part of the Altyn Tagh fault separates the Altyn Tagh belt to the north from the Qaidam Basin to the south.The former was formed as a NE-SW-trending,lens-shaped block,consisting mainly of metamorphic rocks of Proterozoic age,and the latter is a basin that has been elongated in the E-W direction and filled with a thick succession of fluvial and lacustrine sediments of Cenozoic age.The Altyn Tagh fault has been considered to progressively propagate linearly to the northeast accommodating the northeastward growth of the Tibetan Plateau by transfer of horizontal motion into intensive crustal shortening and uplift along the northeastern margin of the plateau.However,structural data from the main part of the fault show that this part of the fault was dominated by transtensional deformation in late Cenozoic time,which resulted in the subsidence of the large Xorkol Basin and deposition of a succession of fluvial and lacustrine sediments as old as Pliocene age.The foliation in the early Proterozoic metamorphic rocks within the Altyn Tagh belt generally strikes NE-SW,but the foliation along the main part of the belt is bent around the Xorkol Basin to strike NW-SE.Such deformation caused the increase in the width of the belt.These data led us to infer that the Altyn Tagh belt has experienced oroclinal bending along the main part of the Altyn Tagh fault around a vertical axis.From the difference in length along the northern and southern edges of the basin, as much as 60 km of late Cenozoic left-lateral motion along the main part of the Altyn Tagh fault was absorbed by the crustal bending and associated extension.The bending of the Altyn Tagh belt implies that the southwestern movement of the Altyn Tagh belt relative to the Qaidam Basin met with strong resistance,which is interpreted to have been generated by NE-SW compression along an E-W-trending segment of the Altyn Tagh fault to the southwest of the Xorkol Basin as part of a restraining bend.

知网文化
【相似文献】
中国重要会议论文全文数据库 前10条
1 Erchie Wang;;Vertical-axis bending of the Altyn Tagh belt along the Altyn Tagh fault:Evidence from late Cenozoic deformation within and around the Xorkol Basin[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
2 WANG Erchie;;An important form of basinmountain coupling:Orogenic belt and flank basin[A];中国科学院地质与地球物理研究所二○○四学术论文汇编·第二卷(青藏高原·岩石圈)[C];2004年
3 ;Geothermal field and thermotectonic evolution in Southern South Yellow Sea Basin[A];中国科学院地质与地球物理研究所二○○三学术论文汇编·第四卷(油气资源)[C];2003年
4 ;Typical basin-fill sequences and basin migration in Yanshan,North China——Response to Mesozoic tectonic transition[A];中国科学院地质与地球物理研究所二○○四学术论文汇编·第二卷(青藏高原·岩石圈)[C];2004年
5 ;Origins of N_2 in the Dongtai Depression of the Subei Basin[A];中国科学院地质与地球物理研究所第十届(2010年度)学术年会论文集(中)[C];2011年
6 李忠;李任伟;孙枢;张雯华;;Mesozoic basin-fill records in south foot of the Dabie Mountains:Implication for Dabie Orogenic attributes[A];中国科学院地质与地球物理研究所二○○三学术论文汇编·第一卷(地球动力学)[C];2003年
7 ;Evidence for enhanced aridity in the Tarim Basin of China since 5.3 Ma[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
8 ;Chemical and Strontium Isotopic Compositions of the Hanjiang Basin Rivers in China:Anthropogenic Impacts and Chemical Weathering[A];中国科学院地质与地球物理研究所第11届(2011年度)学术年会论文集(中)[C];2012年
9 ;Sediment-hosted micro-disseminated gold mineralization constrained by basin paleo-topographic highs in the Youjiang basin,South China[A];中国科学院地质与地球物理研究所2002学术论文摘要汇编[C];2002年
10 ;Water geochemistry of the Xijiang basin rivers,South China:Chemical weathering and CO_2 consumption[A];中国科学院地质与地球物理研究所第十届(2010年度)学术年会论文集(下)[C];2011年
中国重要报纸全文数据库 前2条
1 孔岩 译;拉尼娜加强,NOAA继续预测大西洋将迎活跃飓风季[N];中国气象报;2010年
2 本报记者 王海霞;追问切萨皮克商业模式:干得好还是“嫁”得好?[N];中国能源报;2011年
中国博士学位论文全文数据库 前10条
1 丁玲;低讳度东太平洋地区(Soledad Basin)不同时间尺度生态环境演变记录及控制机制[D];中国海洋大学;2012年
2 张宾;[D];中国海洋大学;2010年
3 童思友;[D];中国海洋大学;2010年
4 陈海清;[D];中国海洋大学;2010年
5 王伟涛;宁夏南部新生代盆地沉积演化及其对青藏高原东北角构造变形的响应[D];中国地震局地质研究所;2011年
6 曲同慈;[D];中国海洋大学;2010年
7 史婷婷;岩溶流域水循环过程碳汇效应研究[D];中国地质大学;2012年
8 崔涛;不整合面型铀矿流体系统数值模拟[D];中国地质大学;2012年
9 S. Morris Cooper(马龙);利比里亚大陆架和盆地的重磁分析[D];中国地质大学;2010年
10 许家姝;漠河盆地构造特征及油气远景研究[D];吉林大学;2010年
中国硕士学位论文全文数据库 前10条
1 王振;青海省黄土丘陵沟壑区沟壑侵蚀状况研究[D];陕西科技大学;2012年
2 杨瑞光;我国党报消费文化观念传播与构建的实证分析[D];兰州大学;2010年
3 齐洋洋;主流媒体塑造我国和谐大国形象的框架分析[D];上海交通大学;2010年
4 凡勇昆;我国教育管理学硕士论文的回顾性研究[D];华东师范大学;2010年
5 罗兰德(NGUIMBI Guy Roland);电加热高温分解桦甸油页岩的实验及仿真[D];吉林大学;2012年
6 陶染春;回族洁净概念的内隐结构分析及跨文化交际教育研究[D];中央民族大学;2012年
7 韩畅;中国大陆与台湾报纸对ECFA的报道框架比较论析[D];吉林大学;2012年
8 孙洁;金属簇合物中金属—金属键性质的理论研究[D];河北师范大学;2012年
9 徐强;巢湖流域生态承载力研究[D];安徽大学;2010年
10 景兴鹏;沁水盆地南部煤层气储层压力分布规律的研究[D];西安科技大学;2010年
中国知网广告投放
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978