Pb and Nd isotopic composition of the Jigongshan granite: constraints on crustal structure of Tongbaishan in the middle part of the Qinling–Tongbai–Dabie orogenic belt, Central China

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• 作者：Zhang ; Hongfei ; Zhong ; Zengqiu ; Gao ; Shan ; Zhang ; Benren ; Zhang ; Li ; Hu ; Shenghong ; Hou ; Qingye
• 关键词：Jigongshan granite ; Pb&ndash ; Nd isotopes ; Crustal structure ; Tectonic implication ; Tongbaishan ; Dabieshan
• 刊名：Lithos
• 出版年：2004
• 出版时间：April, 2004
• 年：2004
• 卷：73
• 期：3-4
• 页码：215-227
• 全文大小：255 K

文摘

The Qinling–Dabie–Sulu belt is the world's largest ultrahigh pressure (UHP) metamorphic belt. The UHP metamorphism is well dated at 220–245 Ma in the Dabie–Sulu belt but at 507 Ma in the Qinling belt. The Tongbaishan is located between the Qinling orogenic belt to the west and the Dabie–Sulu UHP metamorphic belt to the east. It is the key area for studying the tectonic relation between the Qinling and Dabie–Sulu belts and the diachronous UHP metamorphism. The Jigongshan granitic pluton (t