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"Garnet" Lherzolites in the Purang Ophiolite, Tibet: Evidence for Exhumation of Deep Oceanic Lithospheric Mantle
Gong, Xiao-Han1; Shi, Ren-Deng2,3; Xu, Ji-Feng1; Huang, Qi-Shuai2; Huang, Xiao-Xiao4; Su, Ben-Xun5
2020-01-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume47Issue:1Pages:10
AbstractOphiolites commonly sample the uppermost parts (15-20 km) of fossil oceanic lithosphere. However, in recent years, the documentation of diamonds, super-reducing (e.g., SiC), and other "unusual" minerals from several ophiolitic peridotites and chromitites (e.g., Tibet and the Polar Urals) has caused debate concerning their origin (i.e., deep vs. shallower upper mantle). Here we report on symplectite-bearing lherzolites from the Purang ophiolite in Tibet, which preserve the first compelling evidence of garnet-facies protoliths. These lherzolites were previously formed and stabilized at a depth of similar to 85-100 km, which is much deeper than generally suggested and approaches the depth (similar to 120 km) required for stabilizing the diamonds. Combining with other key observations, we suggest the Purang garnet-bearing peridotites may represent mixtures of oceanic lithosphere domains with diverse origins; they were rapidly exhumed at a variety of mantle depths within a subduction channel associated with oceanic slab retreat.
DOI10.1029/2019GL086101
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program
WOS KeywordYARLUNG-ZANGBO SUTURE ; LUOBUSA OPHIOLITE ; PODIFORM CHROMITITES ; SPINEL PERIDOTITE ; YUNGBWA OPHIOLITE ; XIGAZE OPHIOLITE ; SUBDUCTION INITIATION ; RONDA PERIDOTITE ; DIAMOND-BEARING ; TRANSITION ZONE
Language英语
Funding ProjectNational Natural Science Foundation of China[41672054] ; National Natural Science Foundation of China[41802046] ; National Natural Science Foundation of China[41972052] ; Second Tibetan Plateau Scientific Expedition and Research Program[STEP 2019QZKK0801]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000513983400058
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95659
Collection矿产资源研究院重点实验室
Corresponding AuthorShi, Ren-Deng; Xu, Ji-Feng
Affiliation1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
4.North China Univ Water Resources & Elect Power, Coll Geosci & Engn, Zhengzhou, Henan, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Mineral Resources, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Gong, Xiao-Han,Shi, Ren-Deng,Xu, Ji-Feng,et al. "Garnet" Lherzolites in the Purang Ophiolite, Tibet: Evidence for Exhumation of Deep Oceanic Lithospheric Mantle[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1):10.
APA Gong, Xiao-Han,Shi, Ren-Deng,Xu, Ji-Feng,Huang, Qi-Shuai,Huang, Xiao-Xiao,&Su, Ben-Xun.(2020)."Garnet" Lherzolites in the Purang Ophiolite, Tibet: Evidence for Exhumation of Deep Oceanic Lithospheric Mantle.GEOPHYSICAL RESEARCH LETTERS,47(1),10.
MLA Gong, Xiao-Han,et al.""Garnet" Lherzolites in the Purang Ophiolite, Tibet: Evidence for Exhumation of Deep Oceanic Lithospheric Mantle".GEOPHYSICAL RESEARCH LETTERS 47.1(2020):10.
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