Early Cretaceous bimodal volcanic rocks in the southern Lhasa terrane, south Tibet: Age, petrogenesis and tectonic implications

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• 作者：Chao Wang^a ; ^b ; ^{wangchao@itpcas.ac.cn} ; Lin Ding^a ; ^c ; Zhi-Chao Liu^d ; Li-Yun Zhang^a ; ^c ; Ya-Hui Yue^a ; ^c
• 关键词：Gangdese belt ; Bimodal suite ; Early Cretaceous ; Zircon U&ndash ; Pb geochronology and Hf isotopes ; Sr&ndash ; Nd isotopes ; Southern Lhasa terrane
• 刊名：Lithos
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：268-271
• 期：Complete
• 页码：260-273
• 全文大小：3382 K
• 卷排序：268

文摘

An Early Cretaceous (137–130 Ma) bimodal volcanic event was identified in the southernmost margin of the Lhasa terrane. Basaltic rocks were derived from a depleted mantle metasomatized by slab-derived components. Rhyolites were produced by partial melting of juvenile lower crust. The bimodal volcanic suites were likely attributed to the tearing of subducted Neo-Tethyan slab.