Petrogenesis and tectonic implications of the high-K Alamas calc-alkaline granitoids at the northwestern margin of the Tibetan Plateau: Geochemical and Sr-Nd-Hf-O isotope constraints
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- 作者：Qichao Zhanga ; Yan Liub ; ly@cugb.edu.cn" class="auth_mail" title="E-mail the corresponding author ; He Huangb ; Zhenhan Wua ; Qing Zhouc
- 关键词：High-K granitoid ; Alamas ; Tibet ; Western Kunlun Orogen ; Zircon Hf&ndash ; O isotopes
- 刊名：Journal of Asian Earth Sciences
- 出版年：2016
- 出版时间：1 September 2016
- 年：2016
- 卷：127
- 期：Complete
- 页码：137-151
- 全文大小：6929 K
文摘
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SIMS zircon U–Pb dating shows that the Alamas granitoids crystallized at ∼446 Ma.
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The granitic rocks were derived from partial melting of the mafic lower crust, with a component of mantle-derived magma.
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The Alamas pluton was the product of early stage post-collisional magmatism.
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The NKT and the SKT may be amalgamated prior to ca. 446 Ma along the Kudi-Qimanyute suture zone.