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Highly siderophile elements and Os isotope constraints on the genesis of peridotites from the Kizildag ophiolite, southern Turkey

文献类型：期刊论文

作者Chen, Chen5,6,7; Su, Ben-Xun1,5,6; Xiao, Yan4,5; Uysal, Ibrahim3; Lin, Wei1,4,5; Chu, Yang4,5; Jing, Jie-Jun6; Sakyi, Patrick Asamoah2
刊名LITHOS
出版日期2020-09-01
卷号368页码:14
关键词Kizildag ophiolite Highly siderophile elements Os isotopes Partial melting Melt-rock interaction
ISSN号0024-4937
DOI10.1016/j.lithos.2020.105583
英文摘要In this contribution, we present whole-rock major and trace element chemistry, including rare earth elements (REE), highly siderophile elements (HSE), and Re-Os isotope data, together with mineral chemistry for the harzburgites and dunites from the Kizildag ophiolite of SE Turkey, in an attempt to better constrain its petrogenesis. Both the harzburgites and dunites have refractory compositions with CaO contents <0.90 wt%, Al2O3 contents <0.90 wt% and TiO2 contents <0.01 wt%, indicating that they experienced high degrees of partial melting in the supra-subduction zone (SSZ) setting. Besides, the concave-shaped REE patterns and positive anomalies in some incompatible elements (e.g., Cs, Rb and Pb) suggest that the harzburgites and dunites have also experienced interactions with percolating melts after partial melting. Based on the quantitative melt-rock interaction model, the addition of sulfides derived from the percolating magmas could be responsible for the variable HSE contents and suprachondritic Pd/Ir and Pt/Ir ratios observed in some of the harzburgite samples. The extremely low HSE contents in the dunites can be explained by interaction with S-undersaturated melts. Enrichments of Os and Ru in two dunites could be attributed to the precipitation of a higher amount of spinet grains along with the possible Os-Ru miaoparticles. The significantly wide range of Os isotopic ratios in the harzburgites (Os-187/Os-188((90 Ma)) = 0.12152-0.13584; gamma Os-(90 Ma) = -4.31 to 6.96) and dunites ( Os-187/Os-188((90 Ma)) = 0.12690-0.13267; gamma Os-(90 Ma) = -0.08 to 4.47) seems to be consistent with the multi-stage evolution of the oceanic upper mantle. The low Os isotopic ratios (sub-primitive mantle) in some harzburgite samples suggest the lithospheric mantle has experienced ancient melting processes (>1.0 Ga). (C) 2020 Elsevier B.V. All rights reserved.
WOS关键词PLATINUM-GROUP ELEMENTS ; ZANGBO SUTURE ZONE ; RE-OS ; UPPER-MANTLE ; SUBDUCTION INITIATION ; TECTONIC SIGNIFICANCE ; PODIFORM CHROMITITES ; ABYSSAL PERIDOTITES ; TETHYAN OPHIOLITES ; SPINEL-PERIDOTITES
资助项目National Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[41772055] ; National Natural Science Foundation of China[91962217]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000541261600004
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/97161]  
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
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Chen, Chen
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Ghana, Dept Earth Sci, POB LG 58, Legon, Accra, Ghana
3.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
7.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510460, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Chen,Su, Ben-Xun,Xiao, Yan,et al. Highly siderophile elements and Os isotope constraints on the genesis of peridotites from the Kizildag ophiolite, southern Turkey[J]. LITHOS,2020,368:14.
APA Chen, Chen.,Su, Ben-Xun.,Xiao, Yan.,Uysal, Ibrahim.,Lin, Wei.,...&Sakyi, Patrick Asamoah.(2020).Highly siderophile elements and Os isotope constraints on the genesis of peridotites from the Kizildag ophiolite, southern Turkey.LITHOS,368,14.
MLA Chen, Chen,et al."Highly siderophile elements and Os isotope constraints on the genesis of peridotites from the Kizildag ophiolite, southern Turkey".LITHOS 368(2020):14.

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来源：地质与地球物理研究所

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