地质论评2024，Vol.70Issue(3)：1139-1144,6.DOI:10.16509/j.georeview.2023.11.035
大青山地区2.5Ga紫苏花岗岩
Discovery of ca.2.5 gacharnockite in the Daqing Mountains
摘要
Abstract
In China,the early Precambrian basement of the Western block is widely distributed on the northern margin of the North China Craton.Previous study generally suggests that these old rock was influenced by four metamorphic thermal events at ca.2.5 Ga,ca.2.45～2.37 Ga,ca.1.95 Ga and ca.1.85 Ga.The study of the ca.2.5 Ga charnockite from the Yinshan Block which has become a hot topic in revealing the early Precambrian tectonic evolution of on the northern margin of the North China Craton,however,there are few reports of late Neoarchean tectonic thermal events in the Khondalite Belt.In recent years,a stage of Daqing Mountains supracrustal rock,with a metamorphic zircon age at 2.45～2.37 Ga,has been identified from the Khondalite Belt(eg.Garnet biotite gneiss)of the Daqing Mountains area.In field,the Daqing Mountains supracrustal rock and anatectic garnet granite are closely related to each other,however,the mode of its anatectic genesis is still controversial.Herein,we present new geochronological of zircon U-Pb isotopic data via analysis using a sensitive high-resolution ion microprobe for charnockites,and comparing the field spatial output relationship and zircon chronologyits analysis to the garnet granite and its surrounding rocks in the Daqing Mountains terrane.Our aims are to provide the important insights for exploring the genetic model of anatectic garnet granite.关键词
大青山地区/紫苏花岗岩/石榴花岗岩/成因模式Key words
Daqing Mountains area/charnockite/garnet granite/petrogenetic model引用本文复制引用
石强,马龙,陈湘智,徐仲元,李世超,徐进贵,陈开运..大青山地区2.5Ga紫苏花岗岩[J].地质论评,2024,70(3):1139-1144,6.基金项目
本文为西北大学大陆动力学国家重点实验室开放课题基金资助项目(编号:22LCD11),辽宁省教育厅基本科研项目(编号:LJKMZ20220689),第73批中国博士后基金资助项目(编号:2023M732837),国家自然科学基金资助项目(编号:41872194,U2244211)的成果. This study was financially supported by the Opening Foundation of the State Key Laboratory of Continental Dynamics(No.22LCD11),Northwest University,Department of Education of Liaoning Province(No.LJKMZ20220689),and the China Postdoctoral Science Foundation(No.2023M732837).This study was supported by the National Natural Science Foundation of China(Nos.41872194,U2244211) （编号:22LCD11）
