气候变化领域集成服务门户(CCPortal): Garnet Lherzolites in the Purang Ophiolite, Tibet: Evidence for Exhumation of Deep Oceanic Lithospheric Mantle

CCPortal

DOI	10.1029/2019GL086101
	Garnet Lherzolites in the Purang Ophiolite, Tibet: Evidence for Exhumation of Deep Oceanic Lithospheric Mantle
	Gong, Xiao-Han; Shi, Ren-Deng; Xu, Ji-Feng; Huang, Qi-Shuai; Huang, Xiao-Xiao; Su, Ben-Xun
通讯作者	Xu, JF (通讯作者)
发表日期	2020
ISSN	0094-8276
EISSN	1944-8007
卷号	47 期号:1
英文摘要	Ophiolites 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.
关键词	YARLUNG-ZANGBO SUTURE LUOBUSA OPHIOLITE PODIFORM CHROMITITES SPINEL PERIDOTITE YUNGBWA OPHIOLITE XIGAZE OPHIOLITE SUBDUCTION INITIATION RONDA PERIDOTITE DIAMOND-BEARING TRANSITION ZONE
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000513983400058
来源期刊	GEOPHYSICAL RESEARCH LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259922
推荐引用方式 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]. 中国科学院青藏高原研究所,2020,47(1).
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).
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).