典型文献
Fractionation mechanism of iron isotopes in highly fractionated granites from the Xinxian Pluton,Western Dabie Orogen,Central China
文献摘要：
Iron isotopes are important for tracing the magmatic process.The fractionation of iron isotopes in granite is up to 0.55 ‰.In this study,Wangjiagou(XWJ)granite and Tayueping(XTY)granite in the Xinxian pluton of the Western Dabie orogen were evaluated.Both the XTY and XWJ granite belong to monzogranites,with high SiO2(74.42-76.82 wt.％)contents.The granites are depleted of Nb and Ti but enriched with Pb and K,and they display negative Eu anomalies(Eu/Eu*=0.40-0.52)on REE plots that are normalized by chondrite.The δ56Fe values of the XTY granites vary from 0.19±0.03 ‰ to 0.27±0.04‰,and the δ56Fe values of the XWJ granites are 0.34±0.02 ‰ and 0.36±0.01 ‰,respectively.Both the XTY and the XWJ granites belong to highly fraction-ated granites due to their SI(solidification index),DI(differentiation index),and content of CaO.Evidence from the iron isotopes shows that neither fluid exsolution,alteration,weathering,nor partial melting can explain the enrichment of the heavy iron isotopes.The results modeled using the Rayleigh equation showed that fractional crys-tallization can produce Δ56Femelt-crystal with the value of 0.08-0.15 ‰.In conclusion,fractional crystallization was the main factor controlling the fractionation of iron isotopes,and the change of melt composition may also lead to the enrichment of heavy iron isotopes in the residual melt.
文献关键词：
中图分类号：
作者姓名：
Chenglai Deng;Changqing Hu;Qiuyu Wen;Wenbin Yang;Wu Li
作者机构：
Key Laboratory of Coalbed Methane Resource and Reservoir Formation Process,Ministry of Education,China University of Mining and Technology,Xuzhou 221116,People's Republic of China;School of Earth Resources,China University of Geosciences,Wuhan 430074,China;Metal Stable Isotope Geochemistry Laboratory,University of Science and Technology of China,Hefei 230026,China
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引用格式：
[1]Chenglai Deng;Changqing Hu;Qiuyu Wen;Wenbin Yang;Wu Li-.Fractionation mechanism of iron isotopes in highly fractionated granites from the Xinxian Pluton,Western Dabie Orogen,Central China)[J].地球化学学报（英文版）,2022(06):911-925
A类：
Xinxian,Pluton,Wangjiagou,XWJ,Tayueping,XTY,56Femelt
B类：
Fractionation,mechanism,iron,isotopes,highly,fractionated,from,Dabie,Orogen,Central,China,Iron,are,important,tracing,magmatic,process,fractionation,up,In,this,study,pluton,orogen,were,evaluated,Both,belong,monzogranites,SiO2,wt,contents,depleted,Nb,Ti,but,enriched,Pb,they,display,negative,Eu,anomalies,REE,plots,that,normalized,by,chondrite,values,vary,respectively,due,their,SI,solidification,DI,differentiation,CaO,Evidence,shows,neither,fluid,exsolution,alteration,weathering,partial,melting,can,explain,enrichment,heavy,results,modeled,using,Rayleigh,equation,showed,fractional,produce,conclusion,crystallization,was,main,controlling,change,composition,may,also,lead,residual
AB值：
0.432672
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