Cooling History of Mesozoic Magmatism and Implications for Large-Scale Gold Mineralization in the Jiaodong Peninsula, East China: Constraints from T-t Paths Determined by U-Pb Thermochronology of Zircon and Apatite  

作　　者：Guangyan Zhou Mingchun Song Long Li Yan Luo DGraham Pearson Jianbo Zhou Zhengjiang Ding Xuefeng Yu Yingxin Song Jie Li Shiyong Li 

机构地区：[1]Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China [2]Department of Earth&Atmospheric Sciences,University of Alberta,Edmonton,Alberta T6G 2E3,Canada [3]Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,China [4]Shandong Provincial No.6 Exploration Institute of Geology and Mineral Resources,Weihai 264209,China [5]College of Earth Sciences,Jilin University,Changchun 130061,China [6]Ministry of Natural Resources Key Laboratory of Gold Mineralization Processes and Resources Utilization,Key Laboratory of Metallogenic-Geologic Processes and Comprehensive Utilization of Minerals Resources in Shandong Province,Shandong Institute of Geological Sciences,Jinan 250013,China [7]Shandong Nuclear Industry Geological Group 273,Yantai 264006,China

出　　处：《Journal of Earth Science》2024年第3期878-889,共12页地球科学学刊（英文版）

基　　金：supported by the Talent Research Project of Hebei Province(No.HBQZYCXY010);the National Natural Science Foundation of China-Shandong Joint Fund Program entitled“Control Mechanisms of Faults on Deep Gold Deposits in Jiaodong Peninsula”(No.U2006201);Isotopic analyses at the University of Alberta were supported by an NSERC discovery grant to D.G.Pearsonsupported by the National Natural Science Foundation of China(No.42103024);China Postdoctoral Science Foundation(Nos.2020T130618 and 2020M682516).

摘　　要：The Mesozoic intrusions of the Jiaodong Peninsula,eastern China,host giant gold deposits.Understanding the genesis of these deposits requires the determination of the source of the parental auriferous fluid and the timing of gold mineralization,which are strongly influenced by the cooling/uplift histories of the hosting intrusions.We performed an integrated U-Pb geochronology study on both zircon and apatite from four major magmatic episodes of the Jiaodong Peninsula.The zircon and apatite U-Pb ages are 156.9±1.2 and 137.2±2.4 Ma for the Linglong intrusion,129.9±1.0 and 125.0±3.8 Ma for the Qujia intrusion,119.5±0.7 and 117.2±1.8 Ma for the Liulinzhuang intrusion,118.6±1.0 and 111.6±1.6 Ma for the Nansu intrusion,respectively.The coupled zircon and apatite data of these granitoids indicate a slow cooling rate(11.9°C/Ma)in the Late Jurassic,and rapid uplift and cooling(35.8-29.2°C/Ma)in the Early Cretaceous.The dramatically increased uplift and cooling period in the Early Cretaceous are contemporaneous with large-scale gold mineralization in the Jiaodong Peninsula.This implies that thermal upwelling of asthenosphere and related tectonic extension played an important role in gold remobilization and precipitation.

关 键 词：MAGMATISM geochronology ZIRCON APATITE gold deposits Jiaodong Peninsula 

分 类 号：P61[天文地球—矿床学]