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Intermediate chromitite in Kizildag ophiolite (SE Turkey) formed during subduction initiation in Neo-Tethys

文献类型：期刊论文

作者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
刊名ORE GEOLOGY REVIEWS
出版日期2019
卷号104页码:88-100
关键词Chromite Ophiolite Li isotopes Parental magma Subduction initiation
ISSN号0169-1368
DOI10.1016/j.oregeorev.2018.10.004
英文摘要Chromitites 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.
WOS关键词LITHIUM ISOTOPIC SYSTEMATICS ; MELT-ROCK INTERACTION ; POZANTI-KARSANTI OPHIOLITE ; NORTHERN OMAN OPHIOLITE ; PODIFORM CHROMITITES ; PERIDOTITE XENOLITHS ; HIGH-TEMPERATURE ; HATAY OPHIOLITE ; TECTONIC SIGNIFICANCE ; MINERAL CHEMISTRY
资助项目National Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[41772055] ; State Key Laboratory of Lithospheric Evolution[201701]
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000460710600006
出版者ELSEVIER SCIENCE BV
资助机构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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution
源URL[http://ir.iggcas.ac.cn/handle/132A11/90886]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Chen, Chen; Su, Ben-Xun
作者单位1.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
推荐引用方式
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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来源：地质与地球物理研究所

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