Potassium isotope evidence for subducted upper and lower oceanic crust in ocean island basalt sources

doi:10.1016/j.epsl.2024.119015

IOCAS-IR > 海洋环流与波动重点实验室

	Potassium isotope evidence for subducted upper and lower oceanic crust in ocean island basalt sources
	Liu, Haiyang 1; Xue, Ying-Yu 2,3; Geldmacher, Joerg 4; Hoernle, Kaj 4,5; Wiechert, Uwe 6; An, Shichao 7; Gu, Hai-Ou 8; Sun, He 8; Tian, Fanfan 11; Li, Xiaoqiang 9; Wang, Kun10 ; Zhu, Hongli 1,11; Sun, Wei-Dong1,11,12
	2024-11-15
发表期刊	EARTH AND PLANETARY SCIENCE LETTERS
ISSN	0012-821X
卷号	646 页码:13
通讯作者	Liu, Haiyang([email protected]) ; Sun, Wei-Dong([email protected])
摘要	The Madeira mantle plume is proposed to contain a complete package of recycled oceanic lithosphere. It has not been possible, however, to establish if both lower oceanic crust and peridotitic lithospheric mantle are present within the Madeira magma source. This study reports potassium (K) and oxygen isotope data of lavas from the Madeira Archipelago, which show that delta K-41 (-0.50 +/- 0.06 parts per thousand to -0.31 +/- 0.01 parts per thousand) correlates with Sr-Nd-Pb-Hf isotopic compositions, confirming the incorporation of recycled crustal material. The increase in delta K-41 from Madeira's early shield stage lavas (-0.50 +/- 0.06 parts per thousand to -0.40 +/- 0.05 parts per thousand) to the subsequent post-erosional stage lavas (-0.34 +/- 0.04 parts per thousand to -0.31 +/- 0.01 parts per thousand) is consistent with the mantle source becoming progressively depleted in recycled upper oceanic crust (converted to eclogite or pyroxenite) through melt extraction with decreasing age. The post-erosional lavas, however, require a source with higher delta K-41 values than in depleted peridotitic lithospheric mantle. Modeling demonstrates that during dehydration of high-temperature altered lower oceanic crust, the initial heavy K isotopic signature is preserved, consistent with the high delta K-41 values of the post-erosional lavas being derived from hydrothermally-altered lower oceanic crust in the Madeira plume source. Consequently, K isotopes provide direct evidence that ocean island magma sources can contain both upper and lower recycled oceanic crust. This study provides important constraints on the cause of the temporal changes in geochemical composition of ocean island basalts, the origin of mantle heterogeneity and the recycling of K through subduction zones and the deep mantle.
关键词	Stable potassium and oxygen isotopes OIB Mantle heterogeneity Madeira Altered upper and lower oceanic crust
DOI	10.1016/j.epsl.2024.119015
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42373003]; National Natural Science Foundation of China[92258303]; National Natural Science Foundation of China[42221005]; National Natural Science Foundation of China[42322302]; National Natural Science Foundation of China[42249583]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303]; Scientific and Technological Innovation Program of the Laoshan Laboratory[LSKJ202204100]; Taishan Scholar Program of Shandong[tspd20230609]; Fundamental research project of Shandong Province[ZFJH202308]; State Key Laboratory of Marine Geology, Tongji University[MGK202305]; State Key Laboratory for Mineral Deposits Research, Nanjing University[2023-LAMD-K05]; Open Research Project from the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences[GPMR202313]; GEOMAR Helmholtz Center for Ocean Research Kiel; German Research Foundation (DFG)
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001321932800001
出版者	ELSEVIER
WOS关键词	MAGMATIC DIFFERENTIATION ; GEOCHEMICAL EVOLUTION ; MANTLE PLUMES ; FRACTIONATION ; EM ; CIRCULATION ; ECLOGITES ; SEAMOUNTS ; SECTION ; ORIGIN
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/199316
专题	海洋环流与波动重点实验室
通讯作者	Liu, Haiyang; Sun, Wei-Dong
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Key Lab Ocean Observat & Forecasting, Qingdao 266071, Peoples R China 2.MNR, Shandong Prov Key Lab Metallogen Geol Proc & Resou, Key Lab Gold Mineralizat Proc & Resource Utilizat, Jinan 250013, Peoples R China 3.Shandong Inst Geol Sci, Jinan 250013, Peoples R China 4.GEOMAR Helmholtz Ctr Ocean Res Kiel, D-24148 Kiel, Germany 5.Univ Kiel, Inst Geosci, D-24118 Kiel, Germany 6.Free Univ Berlin, Inst Geol Sci, D-12249 Berlin, Germany 7.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China 8.Hefei Univ Technol, Ore Deposit & Explorat Ctr, Hefei 230009, Peoples R China 9.China Univ Geosci, Inst Earth Sci, Beijing 100083, Peoples R China 10.Washington Univ St Louis, McDonnell Ctr Space Sci, Dept Earth & Planetary Sci, St. Louis, MO 63130 USA 11.Laoshan Lab, Ocean Sci & Interdisciplinary Frontiers, Qingdao 266237, Peoples R China 12.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Haiyang,Xue, Ying-Yu,Geldmacher, Joerg,et al. Potassium isotope evidence for subducted upper and lower oceanic crust in ocean island basalt sources[J]. EARTH AND PLANETARY SCIENCE LETTERS,2024,646:13.
APA	Liu, Haiyang.,Xue, Ying-Yu.,Geldmacher, Joerg.,Hoernle, Kaj.,Wiechert, Uwe.,...&Sun, Wei-Dong.(2024).Potassium isotope evidence for subducted upper and lower oceanic crust in ocean island basalt sources.EARTH AND PLANETARY SCIENCE LETTERS,646,13.
MLA	Liu, Haiyang,et al."Potassium isotope evidence for subducted upper and lower oceanic crust in ocean island basalt sources".EARTH AND PLANETARY SCIENCE LETTERS 646(2024):13.