Re-assessment of the effect of fractional crystallization on Mo isotopes: Constraints from I-type granitoids and their enclosed mafic magmatic enclaves
Chen, Shuo1,3,4; Niu, Yaoling2,3,5; Gong, Hongmei1,3,4; Wang, Xiaohong1,3,4; Xue, Qiqi4
刊名CHEMICAL GEOLOGY
2022-05-20
卷号597页码:12
关键词Mo isotopes Granitoids Fractional crystallization Source heterogeneity Continental crust
ISSN号0009-2541
DOI10.1016/j.chemgeo.2022.120814
通讯作者Chen, Shuo(shuochen@qdio.ac.cn)
英文摘要In recent years, considerable progress has been made on the study of Mo isotopes in high-temperature geological processes. However, it is still controversial whether Mo isotope fractionation occurs during magmatic differentiation. Here we reassess the effect of magma differentiation on Mo isotope fractionation using published data in conjunction with our new analysis of Mo isotopes in well-characterized I-type granitoids and their enclosed mafic magmatic enclaves (MMEs) from two plutons in the North Qilian Orogen. The MMEs in each pluton, representing earlier cumulates with greater modal proportions of amphibole and biotite, show similar Mo elemental and isotopic compositions to their host granitoids. The absence of covariation of Mo isotopes with Dy/Dy*, Fe2O3 and K/Rb in both plutons further indicates that fractional crystallization of amphibole, biotite and Fe3+-rich minerals does not fractionate Mo isotopes in these granitoids. On the basis of re-assessment of published and our newly obtained Mo isotope data, we find that there is no clear evidence for Mo isotope fractionation during fractional crystallization in igneous rock. Instead, Mo isotopes of our samples correlate positively with Sr isotopes and Rb/La ratios, and negatively with Nd isotopes and Ce/Pb ratios, indicating clearly that magma source compositional variation controls the variation of Mo isotope compositions of these granitoids.
资助项目National Natural Science Foundation of China (NSFC)[42176087] ; National Natural Science Foundation of China (NSFC)[41906050] ; National Natural Science Foundation of China (NSFC)[41630968] ; National Natural Science Foundation of China (NSFC)[91958215] ; China Postdoctoral Science Foundation[2019M652496] ; NSFC-Shan-dong Joint Fund for Marine Science Research Centers[U1606401] ; Chinese Academy of Sciences[2021206] ; 111 project[B18048] ; Youth Innovation Promotion Association
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:000788828200004
内容类型期刊论文
源URL[http://ir.qdio.ac.cn/handle/337002/178942]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Chen, Shuo
作者单位1.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.China Univ Geosci, Beijing 100083, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
5.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
推荐引用方式
GB/T 7714
Chen, Shuo,Niu, Yaoling,Gong, Hongmei,et al. Re-assessment of the effect of fractional crystallization on Mo isotopes: Constraints from I-type granitoids and their enclosed mafic magmatic enclaves[J]. CHEMICAL GEOLOGY,2022,597:12.
APA Chen, Shuo,Niu, Yaoling,Gong, Hongmei,Wang, Xiaohong,&Xue, Qiqi.(2022).Re-assessment of the effect of fractional crystallization on Mo isotopes: Constraints from I-type granitoids and their enclosed mafic magmatic enclaves.CHEMICAL GEOLOGY,597,12.
MLA Chen, Shuo,et al."Re-assessment of the effect of fractional crystallization on Mo isotopes: Constraints from I-type granitoids and their enclosed mafic magmatic enclaves".CHEMICAL GEOLOGY 597(2022):12.
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