Nature of the pre-collisional lithospheric mantle in Central Tibet: Insights to Tibetan Plateau uplift
Nature of the pre-collisional lithospheric mantle in Central Tibet: Insights to Tibetan Plateau uplift
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西藏中部碰撞前岩石圈地幔的性质：对青藏高原隆起的见解
DOI：
10.1016/j.lithos.2021.106076
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发表时间：
2021-05
期刊：
影响因子：
3.5
通讯作者：
Tang Gong-Jian
中科院分区：
文献类型：
--
作者：
Ma Lin;Wang Qiang;Kerr Andrew C;Tang Gong-Jian
大型碰撞造山带中增生地体的性质在很大程度上决定了造山带的性质和后来的发育。班达索钠基性岩具有明显的洋岛玄武岩（OIB）富集特征，富集Nb（高达139ppm）和轻稀土元素等不相容元素。这次晚中生代（约148 ~ 90 Ma）的基性岩浆活动可能是羌塘北部两期地幔演化的结果。晚侏罗世岩石形成于平向俯冲过程中海洋沉积交代的碳酸岩石圈。而晚白垩世玄武岩则可能来源于岩石圈与上涌软流圈的相互作用，这是由于岩石圈的移动引起的，而之前的岩石圈因再分层而变厚。我们的研究表明，在大陆碰撞之前，羌塘北部存在一个继承的碳酸岩石圈地幔。本文认为，新生代钾质岩幔源的富集与高原隆升密切相关，更有可能是晚白垩世（约90 Ma）以后大陆俯冲的结果。
The properties of accreted terranes in a large collisional orogen determine, in large part, the nature and subsequent development of the orogen. In this paper we present a detailed study of Late Mesozoic sodic mafic magmatic rocks from Central Tibet. These sodic mafic rocks from Bandatso provide an excellent opportunity to assess the nature and evolution of pre-collisional lithospheric mantle in the Himalayan–Tibetan region, and will thus aid our understanding of the evolution of the orogeny. The Bandatso sodic mafic rocks are characterised by marked oceanic island basalt (OIB)-like enrichment in incompatible elements, such as Nb (up to 139 ppm) and light rare-earth elements. This Late Mesozoic (ca. 148 Ma and 90 Ma) mafic magmatism is likely to be the result of two-stage mantle evolution in the northern Qiangtang. The late Jurassic rocks were derived from carbonated lithosphere metasomatized by subducted oceanic sediments during flat subduction. Whereas the late Cretaceous basanites were likely derived from interaction of lithosphere with upwelling asthenosphere induced by removal of lithosphere that had previously been thickened by relamination. Our study suggests the presence of an inherited carbonated lithospheric mantle beneath the northern Qiangtang prior to continental collision. The conclusions from this work suggest that the enrichment of the mantle source of Cenozoic potassic rock closely related to plateau uplift, more likely result from continental subduction after the late Cretaceous (ca. 90 Ma). These conclusions will help our understanding of the Cenozoic geology of this multi-terrane collision system and uplift mechanism of the Tibetan Plateau.
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影响因子：
64.8
作者：
Jianfeng Yang;M. Faccenda
通讯作者：
Jianfeng Yang;M. Faccenda
西藏晚渐新世-早中新世碰撞后岩浆作用的转变
影响因子：
5.8
作者：
Guo, Zhengfu;Wilson, Marjorie
通讯作者：
Wilson, Marjorie
影响因子：
3.7
作者：
F. Goussin;N. Riel;C. Cordier;S. Guillot;P. Boulvais;P. Roperch;A. Replumaz;K. Schulmann;G. Du
通讯作者：
F. Goussin;N. Riel;C. Cordier;S. Guillot;P. Boulvais;P. Roperch;A. Replumaz;K. Schulmann;G. Du
DOI：
10.1002/2016jb013259
发表时间：
2017-02
期刊：
Journal of Geophysical Research: Solid Earth
影响因子：
--
作者：
Quan Ou;Qiang Wang;D. Wyman;Haixiang Zhang;Jin-Hui Yang;Ji‐Peng Zeng;Lu‐Lu Hao;Yi-Wei Chen
通讯作者：
Quan Ou;Qiang Wang;D. Wyman;Haixiang Zhang;Jin-Hui Yang;Ji‐Peng Zeng;Lu‐Lu Hao;Yi-Wei Chen
影响因子：
3.9
作者：
HARRISON, TM;WENJI, C;TAPPONNIER, P
通讯作者：
TAPPONNIER, P