Prolonged Mantle Modification beneath the North China Craton:Evidence from Contrasting Mafic Dykes in Jiaodong Peninsula

作     者：Leilei Dong Zhiming Yang Mingchun Song Leilei Dong;Zhiming Yang;Mingchun Song

作者机构：School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of Deep-Earth DynamicsInstitute of GeologyChinese Academy of Geological SciencesBeijing 100037China College of Earth SciencesHebei GEO UniversityShijiazhuang 050031China Shandong Provincial No.6 Exploration Institute of Geology and Mineral ResourcesWeihai 264209China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2023年第34卷第4期

页      面：1150-1164页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：financially supported by the National Natural Science Foundation of China-Shandong Joint Fund Program (No.U2006201) the Fundamental Research Funds for the Central Universities (No.FRF-TP-20-042A1) National Key Research and Development Project of China (No.2016YFC0600305) 

主　　题：mafic dyke Jiaodong North China Craton lithospheric mantle zircon. 

摘      要：The nature of lithosphere mantle beneath North China Craton(NCC) has been changed during the *** investigated the mafic dykes in Jiaodong to put constraint on the origin of them and reveal the mantle evolution of the *** from Kunyushan and Nansu mafic dykes give concordia U-Pb ages of 114.9 and 52.8 Ma,*** Kunyushan mafic dyke has high MgO(~8.0 wt.%) and Cr(380 ppm) but lower FeO(11 wt.%) *** LILE and light rare earth elements(LREE) are not so strongly enriched relative to the mafic dyke from Kunyushan but display slight enrichment compared to the primitive *** zircon εHf(t) values are obtained(from +11.7 to +19.5,with one outlier of +3.4).It is suggested that the Nansu dyke sourced from an enriched MORB mantle and was generated by fluid flux melting.