IGGCAS OpenIR  > 矿产资源研究院重点实验室
Intermediate chromitite in Kizildag ophiolite (SE Turkey) formed during subduction initiation in Neo-Tethys
Chen, Chen1,2; Su, Ben-Xun1,2,3; Xiao, Yan3; Pang, Kwan-Nang4; Robinson, Paul T.1; Uysal, Ibrahim5; Lin, Wei2,3; Qin, Ke-Zhang1,2; Avci, Erdi6; Kapsiotis, Argyrios7
2019
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume104Pages:88-100
AbstractChromitites in the Kmildag ophiolite mostly occur in the mantle harzburgites and some of them in crustal cumulate dunites. Olivine in both the dunites and chromitites is highly magnesian (Fo = 90.5-92.8 and 90.2-96.1, respectively), while the coexisting chromite varies widely in composition (Cr# = 52.9-68.6 and 57.1-76.2, respectively), placing it between high-Al and high-Cr varieties. Concentrations of Ni, V and Ga in the chromite (Ni: 741-1310 ppm; V: 521-1227 ppm; Ga: 20-51 ppm) are also highly variable, straddling the range of high-Al and high-Cr chromite. Olivine in the dunites and chromitites has a large range of Li concentrations (0.27-2.47 ppm) and delta Li-7 values (- 7.20-29.90%o). Based on the calculated Al2O3 (12.1-17.2 wt.%) contents, FeO/MgO values (0.92-1.57) and trace element concentrations of the parental magmas of the dunites and chromitites, it is suggested that they are transitional between MORB and boninitic melts, and should have been derived by mixing of geochemically and spatially distinct magmas generated by partial melting of different sources. The Li isotopic compositions of olivine from the dunites and chromitites (except KZ14-38 and K215-38) are neither controlled by diffusion nor fractional crystallization, and thus may be intrinsic features of their parental melts. The range of delta Li-7 values of olivine in the dunites and chromitites is analogous to that of arc lavas and marine sediments, indicating that the chromitites record various degrees of melt penetration. The wide range of Li isotopic variations in olivine and chemistry in chromite from the Kizildag chromitites suggest that the parental melts were originated in a proto-forearc mantle during subduction initiation.
KeywordChromite Ophiolite Li isotopes Parental magma Subduction initiation
DOI10.1016/j.oregeorev.2018.10.004
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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution
WOS KeywordLITHIUM ISOTOPIC SYSTEMATICS ; MELT-ROCK INTERACTION ; POZANTI-KARSANTI OPHIOLITE ; NORTHERN OMAN OPHIOLITE ; PODIFORM CHROMITITES ; PERIDOTITE XENOLITHS ; HIGH-TEMPERATURE ; HATAY OPHIOLITE ; TECTONIC SIGNIFICANCE ; MINERAL CHEMISTRY
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]
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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000460710600006
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90886
Collection矿产资源研究院重点实验室
Corresponding AuthorChen, Chen; Su, Ben-Xun
Affiliation1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, POB 9825, Beijing 100029, Peoples R China
4.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
5.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey
6.Istanbul Univ Cerrahpasa, Dept Geol Engn, TR-34320 Istanbul, Turkey
7.Sun Yat Sen Univ, Key Lab Offshore Oil Explorat & Dev, Guangdong Prov Key Lab Marine Resources & Coastal, Guangdong Higher Educ Inst,Sch Marine Sci, Guangzhou 510275, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Chen, Chen,Su, Ben-Xun,Xiao, Yan,et al. Intermediate chromitite in Kizildag ophiolite (SE Turkey) formed during subduction initiation in Neo-Tethys[J]. ORE GEOLOGY REVIEWS,2019,104:88-100.
APA Chen, Chen.,Su, Ben-Xun.,Xiao, Yan.,Pang, Kwan-Nang.,Robinson, Paul T..,...&Kapsiotis, Argyrios.(2019).Intermediate chromitite in Kizildag ophiolite (SE Turkey) formed during subduction initiation in Neo-Tethys.ORE GEOLOGY REVIEWS,104,88-100.
MLA Chen, Chen,et al."Intermediate chromitite in Kizildag ophiolite (SE Turkey) formed during subduction initiation in Neo-Tethys".ORE GEOLOGY REVIEWS 104(2019):88-100.
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