Re-assessment of the effect of fractional crystallization on Mo isotopes: Constraints from I-type granitoids and their enclosed mafic magmatic enclaves

doi:10.1016/j.chemgeo.2022.120814

IOCAS-IR

	Re-assessment of the effect of fractional crystallization on Mo isotopes: Constraints from I-type granitoids and their enclosed mafic magmatic enclaves
	Chen, Shuo 1,2,3; Niu, Yaoling 2,4,5; Gong, Hongmei 1,2,3; Wang, Xiaohong 1,2,3; Xue, Qiqi 1
	2022-05-20
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	597 页码:12
通讯作者	Chen, Shuo(shuochen@qdio.ac.cn)
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.
关键词	Mo isotopes Granitoids Fractional crystallization Source heterogeneity Continental crust
DOI	10.1016/j.chemgeo.2022.120814
收录类别	SCI
语种	英语
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
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000788828200004
出版者	ELSEVIER
WOS关键词	CONTINENTAL-CRUST GROWTH ; QILIAN OROGENIC BELT ; NORTH CHINA CRATON ; MG ADAKITIC ROCKS ; MICROGRANULAR ENCLAVES ; HEKLA VOLCANO ; MOLYBDENUM ; DIFFERENTIATION ; SUBDUCTION ; ANOXIA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/178941
通讯作者	Chen, Shuo
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 4.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 5.China Univ Geosci, Beijing 100083, Peoples R China
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.