SHRIMP zircon UPb dating, geochemistry and SrNdHf isotopes of the Tongcun ore-bearing porphyry in NW Zhejiang Province, South China

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• 关键词：Geochemistry ; SHRIMP zircon UPb dating ; SrNdHf isotopes ; Tongcun porphyry ; NW Zhejiang Province
• 刊名：Journal of Geochemical Exploration
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：172
• 期：Complete
• 页码：50-61
• 全文大小：2754 K
• 卷排序：172

文摘

The Tongcun porphyry was emplaced at 168.7 ± 2.8 Ma according to SHRIMP UPb dating. Three porphyries in the Tongcun deposit area are most likely I-type granites. They were possibly formed in a volcanic arc regime and underwent fractional crystallization. SrNdHf isotopes imply a mixed source of ancient crust and 30–50% juvenile components. They probably lack metallogenic potential to form a giant porphyry Cu deposit.