IGGCAS OpenIR  > 矿产资源研究院重点实验室
High-temperature chromium isotope fractionation and its implications: Constraints from the Kizildag ophiolite, SE Turkey
Chen, Chen1,2; Su, Ben-Xun1,2; Xiao, Yan3; Sakyi, Patrick Asamoah4; He, Xiao-Qing5; Pang, Kwan-Nang6; Uysal, Ibrahim7; Avci, Erdi8; Qin, Li-Ping5
2019-10-01
Source PublicationLITHOS
ISSN0024-4937
Volume342Pages:361-369
AbstractChromium isotope data were obtained from olivine, orthopyroxene and chromite separates of the Kizildag ophiolite, SE Turkey, to investigate the effects of high temperature magma processes on Cr isotope fractionation. Harzburgite in the Kizildag ophiolite has the delta Cr-53 values of -0.14 to -0.12 parts per thousand in chromite, and -0.08 to -0.01 parts per thousand in bulk rocks. These Cr isotope fractionations could be driven by partial melting and metasomatism. The dunite and chromitite samples from the mantle-crust transition zone of the Kizildag ophiolite are cumulates, and their chromite and olivine have delta Cr-53 values of -0.29 to -0.06 parts per thousand and -0.11 to 0.41 parts per thousand, respectively. The delta Cr-53 values of chromite are negatively correlated with the chemical indices of fractional crystallization (e.g., Fe# of chromite), suggesting that Cr isotopes were fractionated during fractional crystallization. In the chromitite, the degree of Cr isotope fractionation increases with fractional crystallization, with 0.23 parts per thousand Cr isotope fractionation occurring at mineral scale. During fractional crystallization, solid phases preferentially incorporate Cr, particularly heavy Cr isotopes, driving the depletion of Cr and enrichment of light Cr isotopes in the evolved melts. The delta Cr-53 values of olivine are higher than the coexisting chromite, which could be explained by the fact that the olivine grains were probably formed earlier than the chromite. The Cr isotopic features of chromite in the podiform chromitite (-0.22 to 0.04 parts per thousand) from the mantle sequence are consistent with the modelled fractional crystallization trend, confirming the magmatic origin of the podiform chromitite. Therefore, a significant Cr isotope fractionation at chromite from the Kizildag ophiolite could be induced by the high-temperature fractional crystallization. (C) 2019 Elsevier B.V. All rights reserved.
KeywordChromite Olivine Cr isotope fractionation Partial melting Fractional crystallization Ophiolite
DOI10.1016/j.lithos.2019.05.038
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS KeywordPODIFORM CHROMITITES ; LUOBUSA OPHIOLITE ; PERIDOTITE ; SPINEL ; MANTLE ; CR ; OLIVINE ; ORIGIN ; MELTS ; IRON
Language英语
Funding ProjectNational Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[41772055] ; State Key Laboratory of Lithospheric Evolution[201701] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2016067]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000477091500023
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92963
Collection矿产资源研究院重点实验室
Corresponding AuthorChen, Chen; Su, Ben-Xun
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
4.Univ Ghana, Sch Phys & Math Sci, Dept Earth Sci, POB LG 58, Legon, Ghana
5.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China
6.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
7.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey
8.Istanbul Univ Cerrahpasa, Dept Geol Engn, TR-34320 Istanbul, Turkey
Recommended Citation
GB/T 7714
Chen, Chen,Su, Ben-Xun,Xiao, Yan,et al. High-temperature chromium isotope fractionation and its implications: Constraints from the Kizildag ophiolite, SE Turkey[J]. LITHOS,2019,342:361-369.
APA Chen, Chen.,Su, Ben-Xun.,Xiao, Yan.,Sakyi, Patrick Asamoah.,He, Xiao-Qing.,...&Qin, Li-Ping.(2019).High-temperature chromium isotope fractionation and its implications: Constraints from the Kizildag ophiolite, SE Turkey.LITHOS,342,361-369.
MLA Chen, Chen,et al."High-temperature chromium isotope fractionation and its implications: Constraints from the Kizildag ophiolite, SE Turkey".LITHOS 342(2019):361-369.
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