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U-Pb dating of the Cida alkali complex in the Dechang-areasouthern Sichuan, China

Qingcha Lin,Bin Xia,Yuquan Zhang

Geological Bulletin of China（2006）

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Abstract
Zircon SHRIMP U-Pb dating was performed on alkali feldspar-quartz syenite and arfvedsonite alkali granite in the Cida alkali complex in the Dechang area, in the Panxi paleorift. It gave ages of 221 ± 6 Ma and 225±2 Ma respectively, which suggests that the crystallization or rock-forming age of the alkali complex is Late Triassic and also implies that extension-fracturing of the Panxi paleorift occurred in the Triassic.
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Alkali feldspar-quartz syenite,Alkali granite,Panxi paleorift,SHRIMP age,Southern Sichuan,Zircon
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