Petrogenesis and tectonic implications of Triassic mafic complexes with MORB/OIB affinities from the western Garzê-Litang ophiolitic mélange, central Tibetan Plateau
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- 作者：Bin Liua ; liubincug@foxmail.com" class="auth_mail" title="E-mail the corresponding author ; Chang-Qian Mab ; c ; cqma@cug.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Yu-Heng Guoc ; Fu-Hao Xiongd ; Pan Guoe ; Xin Zhangc
- 关键词：Mafic ; MORB/OIB affinities ; Ophiolite ; Garzê ; -Litang suture ; Central Tibetan Plateau
- 刊名：Lithos
- 出版年：2016
- 出版时间：1 September 2016
- 年：2016
- 卷：260
- 期：Complete
- 页码：253-267
- 全文大小：3454 K
文摘
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We report Triassic mafic complexes with MORB/OIB affinities from the western Garzê-Litang ophiolitic mélange (central Tibetan Plateau).
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Geochemical and Sr-Nd isotopic data reveal that these rocks were likely derived from depleted MORB-type mantle metasomatized by crustal components or enriched lithospheric mantle metasomatized by OIB-like components.
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We propose that a new model involving back-arc basin spreading associated with OIB/seamount recycling could account for geochemical variations of these rocks.