Contributions of slab-derived fluids to ultrapotassic rocks indicated by K isotopes

doi:10.1016/j.lithos.2021.106202

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	Contributions of slab-derived fluids to ultrapotassic rocks indicated by K isotopes
	Liu, Haiyang 3,4,6; Xue, Ying-Yu 3,4,6; Wang, Kun 3,4,5,6; Sun, Wei-Dong 2,3,4,5,6; Wang, Kun 1
刊名	LITHOS
	2021-09-01
卷号	396 页码:14
关键词	K isotopes Ultrapotassic rock Lithospheric mantle Subduction Metasomatism North Qinling Orogen
ISSN号	0024-4937
DOI	10.1016/j.lithos.2021.106202
通讯作者	Liu, Haiyang(hyliu@qdio.ac.cn) ; Xue, Ying-Yu(yingyuxue01@hotmail.com)
英文摘要	Mantle-derived ultrapotassic rocks (K2O/Na2O > 2, K2O > 3 wt%, and MgO > 3 wt%) are crucial to reveal crust mantle interactions. Here, we present petrographic compositions, whole-rock geochemical and potassium (K) isotopic compositions of Baoji ultrapotassic rocks from North Qinling Orogen, China, to trace their origin. The high Ba/La, Ba/Th, Ba/Rb and low Rb/Sr ratios of the investigated ultrapotassic rocks, together with partial melting modelling, reveal a garnet-facies amphibole lherzolite mantle source modified by slab-derived fluids. In particular, the delta K-41 values of the ultrapotassic rocks (-0.57 parts per thousand to -0.06 parts per thousand) are higher than that of the depleted mantle and display positive correlations with K/Th, Ba/Th and Ba/Rb ratios, which indicate that slab-derived fluids have contributed heavy K isotopic signatures to the mantle source from which the ultrapotassic rocks were derived. Collectively, the data demonstrate that slab-derived fluids, or supercritical fluids play important roles in the generation of post-collisional ultrapotassic rocks and K isotopes have the ability to trace the deep processes in subduction zones. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050103] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303] ; National Natural Science Foundation of China[41903006] ; China Postdoctoral Science Foundation[2019M652497] ; China Postdoctoral Science Foundation[2020T130656] ; postdoctoral innovation project of Shandong province ; postdoctoral applied research program of Qingdao City ; Qingdao National Laboratory for Marine Science and Technology[2017ASTCP-OS07]
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000670300500001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/176948]
专题	海洋研究所_深海极端环境与生命过程研究中心
通讯作者	Liu, Haiyang; Xue, Ying-Yu
作者单位	1.Washington Univ, Dept Earth & Planetary Sci, McDonnell Ctr Space Sci, St Louis, MO 63130 USA 2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Liu, Haiyang,Xue, Ying-Yu,Wang, Kun,et al. Contributions of slab-derived fluids to ultrapotassic rocks indicated by K isotopes[J]. LITHOS,2021,396:14.
APA	Liu, Haiyang,Xue, Ying-Yu,Wang, Kun,Sun, Wei-Dong,&Wang, Kun.(2021).Contributions of slab-derived fluids to ultrapotassic rocks indicated by K isotopes.LITHOS,396,14.
MLA	Liu, Haiyang,et al."Contributions of slab-derived fluids to ultrapotassic rocks indicated by K isotopes".LITHOS 396(2021):14.