U-Pb-Hf isotopes of Neoarchean Shuimowan tonalites in southern margin of North China Craton: constraints on petrogenesis

作     者：HAO Leran YANG Haotian YANG Donghong HAO Leran;YANG Haotian;YANG Donghong

作者机构：College of Earth SciencesJilin UniversityChangchun 130061China International Center for Geoscience Research and Education in Northeast AsiaJilin UniversityChangchun 130026China 

出 版 物：《Global Geology》 (世界地质（英文版）)

年 卷 期：2020年第23卷第3期

页      面：180-190页

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：projects of the Natural Science Foundation of China(41722204) Basic Scientific Research Foundation of Central Universities of China(Jilin University) 

主　　题：tonalite Neoarchean petrogenesis Hf isotope North China Craton 

摘      要：This study presents zircon LA-ICP-MS U-Pb geochronology,trace elements characteristics,whole rock geochemistry composition and zircon Hf isotopic data of Shuimowan tonalites in Dengfeng *** results show that zircons from Shuimowan tonalites have oscillatory growth zoning,relatively high Th/U ratios(0.8--1.7)and upturned zircon rare earth elements(REE),indicating that they are magmatic *** tonalites yield a weighted mean 207 Pb/206 Pb age of 2522±9 Ma,indicating they were formed in the latest *** tonalites are characterized by relatively low SiO 2 contents,high MgO and Na 2O contents,high REE(∑REE=322×10-6-354×10-6),obvious fractionation of REE,enrichment in LREE and feeble negative Eu anomaly(Eu/Eu*=0.97--0.99).The samples are also enriched in large ion lithophile elements and depleted in high field strength elements,with negative Nb,Ta,P and Ti ***εHf(t)values of zircon grains from Shuimowan tonalites range between 3.5 and *** with regional tectonic evolution,it is suggested that Shuimowan tonalites were derived from partial melting of mantle peridotite metasomatized by the slab-derived felsic melt and formed in the arc magma tectonic setting related to plate *** on the Neoarchean Shuimowan tonalites provides a constraint for the study of the Pre-Cambrian tectonic evolution in the southern margin of North China Craton.