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

doi:10.1016/j.lithos.2021.106202

	Contributions of slab-derived fluids to ultrapotassic rocks indicated by K isotopes
	Liu, Haiyang 1,2,3; Xue, Ying-Yu 1,2,3; Wang, Kun1,2,3,5 ; Sun, Wei-Dong1,2,3,5,6 ; Wang, Kun4
	2021-09-01
发表期刊	LITHOS
ISSN	0024-4937
卷号	396 页码:14
通讯作者	Liu, Haiyang([email protected]) ; Xue, Ying-Yu([email protected])
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.
关键词	K isotopes Ultrapotassic rock Lithospheric mantle Subduction Metasomatism North Qinling Orogen
DOI	10.1016/j.lithos.2021.106202
收录类别	SCI
语种	英语
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
WOS类目	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000670300500001
出版者	ELSEVIER
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/176949
专题	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.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Washington Univ, Dept Earth & Planetary Sci, McDonnell Ctr Space Sci, St Louis, MO 63130 USA 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, 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.

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