Subduction–collision and exhumation of eclogites in the Lhasa terrane, Tibet Plateau
Subduction–collision and exhumation of eclogites in the Lhasa terrane, Tibet Plateau
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青藏高原拉萨地体的俯冲碰撞与榴辉岩折返
DOI：
10.1016/j.gr.2020.01.019
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发表时间：
2020-03
影响因子：
6.1
通讯作者：
Xianzhi Cao
中科院分区：
文献类型：
--
作者：
Yiming Liu;Sanzhong Li;Chaoming Xie;M. Santosh;Yongjiang Liu;Yuchao Dong;Bin Wang;Runhua Guo;Xianzhi Cao
二叠系—三叠系榴辉岩和石炭系—三叠系蛇绿岩的发现表明拉萨地体存在古特提斯洋，但高压岩石的俯冲机制和出露机制尚不明确。本文重点研究了Sumdo地区主要岩石的变形、变质作用和年代学，以期约束特提斯洋的构造演化和榴辉岩发掘的地球动力学机制。构造分析表明研究区主要处于d1和D2两个变形阶段。第1型榴辉岩（~260 Ma）形成的d - 1变形（264 ~ 235 Ma）以渗透的Sn+1片理作用和固体流变褶皱为主，并在~240 Ma沿俯冲通道掘出。d2变形（213 ~ 180 Ma）以紧密等斜翻转褶皱和逆冲断裂为特征，与第二类榴辉岩（~230 Ma）的碰撞掘出（~200 Ma）有关。班公-怒江洋和印度河-雅鲁藏布江-特提斯洋的扩张引发了松都特提斯洋的闭合和初始俯冲。
The Tibet Plateau is a key region to understand the evolution of the Tethys Oceans. The finding of Permian–Triassic eclogites and Carboniferous–Triassic ophiolites indicated the existence of a Paleo–Tethys Ocean in the Lhasa terrane, although the mechanism of subduction and exhumation mechanism of the high–pressure rocks remains equivocal. Here we focus on deformation, metamorphism, and geochronology of key rocks in the Sumdo area with a view to constrain the tectonic evolution of the Tethys Ocean and the geodynamic mechanism of eclogite exhumation. Structural analysis indicates two main stages of deformation (D1and D2) in the study area. The D1deformation (264–235 Ma) is dominated by penetrative Sn+1foliation and solid rheological folds, resulted from the first type eclogites (~260 Ma), with exhumation at ~240 Ma along the subduction channel. The D2deformation (213–180 Ma) is characterized by the tight and isoclinal overturned folds and thrust faults, related with the collisional exhumation (~200 Ma) of the second type eclogite (~230 Ma). Spreading of the Bangong–Nujiang and Indus–Yarlung Zangbo Tethys Oceans triggered the closure of Sumdo Tethys Ocean, as well as their initial subduction.
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影响因子：
3.5
作者：
Hao Cheng;Chao Zhang;J. Vervoort;Honghua Lu;Chao Wang;D. Cao
通讯作者：
Hao Cheng;Chao Zhang;J. Vervoort;Honghua Lu;Chao Wang;D. Cao
DOI：
10.1007/s11430-006-0348-y
发表时间：
2006-03
期刊：
Science in China Series D
影响因子：
--
作者：
Jie Zhu;Yuansheng Du;Zaoxue Liu;Q. Feng;Wangxue Tian;Jin-Ping Li;Chang-Liang Wang
通讯作者：
Jie Zhu;Yuansheng Du;Zaoxue Liu;Q. Feng;Wangxue Tian;Jin-Ping Li;Chang-Liang Wang
中国藏北古特提斯洋三叠纪俯冲：来自羌塘地块榴辉岩和蓝片岩地球化学和同位素特征的证据
影响因子：
3
作者：
Zhai, Qing-Guo;Jahn, Bor-Ming;Zhang, Ru-Yuan;Wang, Jun;Su, Li
通讯作者：
Su, Li
西藏松多(U)HP变质带新大多地区含石榴石云母片岩变质演化及时代制约
影响因子：
2.3
作者：
Zhang Cong;Bader Thomas;Zhang Lingmin;Shen Tingting;Li Peng;Li Xuping
通讯作者：
Li Xuping
影响因子：
2.3
作者：
Jian‐Jun Fan;Cai Li;Jin-Heng Liu;Ming Wang;Yiming Liu;Chao-Ming Xie
通讯作者：
Jian‐Jun Fan;Cai Li;Jin-Heng Liu;Ming Wang;Yiming Liu;Chao-Ming Xie