Zircon La-ICPMS U-Pb Dating of the Weipu Granitic Pluton in Southwest Fujian and the Changpu Migmatite in South Jiangxi:Constrains to the Timing of Caledonian Movement in Wuyi Mountains

The Weipu granitic pluton and the Changpu migmatite are developed in the southern part of the Wuyi tectonic belt,South China.Two rock samples taken from the NNE trending Weipu granitic pluton in southwestern Fujian were dated by zircons La-ICPMS U-Pb technique.The yield ages(447.1 4.7Ma and 440.8 3.4Ma) confirm that this granitic pluton belongs to the Caledonian in stead of Indosinian.The Changpu migmatite develops along the northern edge of the Luofu granitic pluton previously considered as Early Yanshanian age.One migmatite sample was dated by zircons La-ICPMS U-Pb methods and yields the age of 445.9 3.8 Ma,confirming that the Luofu granitic pluton might belong to the Caledonian.These high precision dating date provide constrains on the timing and nature of the Caledonian Movement in the Wuyi Mountains.