Correlated crustal and mantle melting documents proto-Tibetan Plateau growth  

作　　者：Wei Li Rizheng He Xiaohui Yuan Felix Schneider Frederik Tilmann Zhen Guo Yongshun John Chen 

机构地区：[1]School of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China [2]Deutsches Geo-ForschungsZentrum GFZ,Potsdam 14473,Germany [3]SinoProbe Laboratory,Chinese Academy of Geological Sciences,Beijing 100094,China [4]Freie Universität Berlin,Berlin 12249,Germany [5]Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《National Science Review》2024年第9期186-195,共10页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(42074112,4171101169,41574086,41274095 and 42374110);the Central Publicinterest Scientific Institution Basal Research Fund(JKYZD202302 and JKY202221);the Geological Investigation Project(DD20230008 and DD20221643);the DFG Deutsche Forschungsgemeinschaft(392149212);supported by the‘CUG Scholar’Scientific Research Funds at China University of Geosciences(Wuhan)(2022114);the Sino-German(CSC-DAAD)Postdoc Scholarship.

摘　　要：The mechanism that causes the rapid uplift and active magmatism of the Hoh-Xil Basin in the northern Tibetan Plateau and hence the outward growth of the proto-plateau is highly debated,more specifically,over the relationship between deep dynamics and surface uplift.Until recently the Hoh-Xil Basin remained uncovered by seismic networks due to inaccessibility.Here,based on linear seismic arrays across the Hoh-Xil Basin,we present a three-dimensional S-wave velocity(VS)model of the crust and uppermost mantle structure beneath the Tibetan Plateau from ambient noise tomography.This model exhibits a widespread partially molten crust in the northern Tibetan Plateau but only isolated pockets in the south manifested as low-VS anomalies in the middle crust.The spatial correlation of the widespread low-VS anomalies with strong uppermost mantle low-VS anomalies and young exposed magmatic rocks in the Hoh-Xil Basin suggests that the plateau grew through lithospheric mantle removal and its driven magmatism.

关 键 词：S-wave velocity ambient noise tomography partial melting Tibetan Plateau Hoh-Xil Basin 

分 类 号：P54[天文地球—构造地质学]