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Mesozoic–Cenozoic Tectonic Evolution and Uplift in Pamir: Application of Fission Track Thermochronology
Acta Geologica Sinica-English Edition ( IF 3.3 ) Pub Date : 2021-03-24 , DOI: 10.1111/1755-6724.14671
Baocheng FAN 1, 2 , Mingyi LIU 2 , Zixin HE 2 , Guanglu MENG 2 , Huanhuan WU 1 , Lu LI 3
Affiliation  

The Pamir Plateau can be divided into three secondary tectonic units from north to south: the North, the Middle and the South Pamir Blocks. The North Pamir Block belonged to the southern margin of Tarim-Karakum, thermochronological study of the Pamir structural intersection indicates that accretion of the Middle Pamir Block to the Eurasian Continental Margin and its subduction and collision with the North Pamir Block occurred in the Middle–Late Jurassic. Due to the Neo-Tethys closure in the Early Cretaceous, the South Pamir Block began to collide with the accretion (the Middle Pamir Block) of the Eurasian Continental Margin. Affected by the collision and continuous convergence between the Indian Plate and the Eurasian Plate since the Cenozoic, Pamir is in a multi-stage differential uplift process. During 56.1–48.5 Ma, North Pamir took the lead in uplifting, that is, the first rapid uplift in the Pamir region began there. The continuous compression and contraction of the Indian and Eurasian plates during 22.0–15.1 Ma forced the Pamir tectonic syntaxis to begin its overall uplift, i.e. Pamir began to enter the second rapid uplift stage in the Early Oligocene, which lasted until the Middle Miocene. During 14.6–8.5Ma, South Pamir was in a rapid uplift stage, while North Pamir was in a relatively stable state, showing asymmetry of tectonic deformation in the Pamir region in space. Since 6.5 Ma, Pamir began to rapidly uplift again.

中文翻译:

帕米尔中新生代构造演化与隆升:裂变径迹热年代学的应用

帕米尔高原从北向南可划分为三个次要构造单元:北、中、南帕米尔地块。北帕米尔地块属于塔里木-卡拉库姆南缘,帕米尔构造交汇处的热年代学研究表明,中晚期帕米尔地块向欧亚大陆边缘增生并与北帕米尔地块发生俯冲碰撞。侏罗纪。由于早白垩世新特提斯的闭合,南帕米尔地块开始与欧亚大陆边缘的增生(中帕米尔地块)发生碰撞。受新生代以来印度板块与欧亚板块不断碰撞和不断辐合的影响,帕米尔高原处于多阶段差异隆升过程。在 56.1–48.5 Ma 期间,北帕米尔率先隆升,即帕米尔地区首次快速隆升从此处开始。22.0~15.1 Ma 期间印度和欧亚板块的持续压缩和收缩迫使帕米尔构造构造开始整体隆升,即帕米尔在早渐新世开始进入第二次快速隆升阶段,一直持续到中中新世。14.6~8.5Ma期间,南帕米尔处于快速隆升阶段,北帕米尔处于相对稳定状态,显示出帕米尔地区空间构造变形的不对称性。6.5 Ma以来,帕米尔高原再次开始快速隆升。早渐新世,帕米尔开始进入第二次快速隆升阶段,一直持续到中中新世。14.6~8.5Ma期间,南帕米尔处于快速隆升阶段,北帕米尔处于相对稳定状态,显示出帕米尔地区空间构造变形的不对称性。6.5 Ma以来,帕米尔高原再次开始快速隆升。早渐新世,帕米尔开始进入第二次快速隆升阶段,一直持续到中中新世。14.6~8.5Ma期间,南帕米尔处于快速隆升阶段,北帕米尔处于相对稳定状态,显示出帕米尔地区空间构造变形的不对称性。6.5 Ma以来,帕米尔高原再次开始快速隆升。
更新日期:2021-03-24
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