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DOI	10.1007/s00410-022-01988-5
	Hydrothermal metasomatism and solid-phase transfer in petrogenesis of listvenite: the Meso-Tethyan ophiolite, central Tibet, China
	Ji, Chen; Zhang, Kai-Jun; Yan, Li-Long
发表日期	2023
ISSN	0010-7999
EISSN	1432-0967
卷号	178 期号:1
英文摘要	In this paper, we present mineralogical, whole-rock geochemical, Sr and Pb isotopic, and zircon trace elemental and U-Pb geochronological data for the newly-discovered Pengco listvenite in central Tibet, in an attempt to probe the petrogenesis of listvenite and the tectonic environment. The listvenite is composed of magnesite, quartz and minor dolomite and Cr-spinel. Chemistry of abundant protogenetic Cr-spinel in the Pengco listvenite as well as the whole-rock Cr and Ni concentrations and low rare-earth element contents indicates the harzburgite protolith. Addition of Ca and K and redistribution of Si at sample scale suggest that the formation of Pengco listvenite was not an isochemical process. Serpentinization could partly accounts for the enrichments in some fluid mobile elements before listvenitization. The epsilon(Hf)(t) values of xenocrystic zircons in the Pengco listvenite are dominantly negative, suggesting a continental crustal source. The zircon age spectra and high whole-rock initial Sr-87/Sr-86 values (0.7094-0.7107, and one up to 0.7193) and high Pb-207/Pb-204 (15.750-15.759), Pb-208/Pb-204 (39.145-39.215) and Pb-206/Pb-204 (18.542-18.567) of the Pengco listvenite are similar to those of the Qiangtang continental sediments/upper crust, indicating the terrigenous source of reactant fluids and fluid-assisted solid-state transfer during the formation of listvenite. The Pengco listvenite is likely formed in the forearc extensional environment of the Bangong Meso-Tethyan ocean during the Late Jurassic.
关键词	Tibet Listvenite Bangong Meso-Tethyan suture zone Carbonation Solid-phase transfer Forearc extension Ophiolite
英文关键词	PB ISOTOPE COMPOSITIONS; SITU U-PB; TRACE-ELEMENT; GEOCHEMICAL EVIDENCE; MINERAL CARBONATION; TECTONIC EVOLUTION; GARNET PERIDOTITE; EASTERN DESERT; LU-HF; ZIRCON
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000902640800001
来源期刊	CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282854
作者单位	Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; China Geological Survey; Chinese Academy of Geological Sciences; Institute of Geology, Chinese Academy of Geological Sciences
推荐引用方式 GB/T 7714	Ji, Chen,Zhang, Kai-Jun,Yan, Li-Long. Hydrothermal metasomatism and solid-phase transfer in petrogenesis of listvenite: the Meso-Tethyan ophiolite, central Tibet, China[J],2023,178(1).
APA	Ji, Chen,Zhang, Kai-Jun,&Yan, Li-Long.(2023).Hydrothermal metasomatism and solid-phase transfer in petrogenesis of listvenite: the Meso-Tethyan ophiolite, central Tibet, China.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,178(1).
MLA	Ji, Chen,et al."Hydrothermal metasomatism and solid-phase transfer in petrogenesis of listvenite: the Meso-Tethyan ophiolite, central Tibet, China".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 178.1(2023).