Geochemical constraints on source nature and recycled oceanic crust in the mantle of the Celebes Sea

doi:10.1016/j.lithos.2022.106685

	Geochemical constraints on source nature and recycled oceanic crust in the mantle of the Celebes Sea
	Wang, Shuai 1,2; Zhang, Guoliang 1,3
	2022-06-01
发表期刊	LITHOS
ISSN	0024-4937
卷号	418 页码:12
通讯作者	Zhang, Guoliang([email protected])
摘要	Indian-type mantle is extensively distributed in the marginal basins of the western Pacific; however, the origin of this mantle remains unclear. The Celebes Sea is located between the Pacific and Indian oceans, and its igneous crustal rocks provide crucial constraints on if and on how this anomalous mantle developed in the region. However, limited knowledge has been obtained on the origin of mantle source of the Celebes Sea because only normal-type mid-ocean ridge basalts (N-MORBs) at ODP Site U770 in this basin have been examined. In this study, both N-MORBs and enriched (E)-MORBs were identified at Site U770, which were analyzed for whole-rock major and trace elements, Sr-Nd-Pb-Hf isotopes, and in situ olivine geochemistry. Site U770 basalt samples are Indian-type (i.e., plot above the Northern Hemisphere reference line [NHRL] on plots of 208Pb/204Pb and 207Pb/204Pb versus 206Pb/204Pb) MORBs, based on their Sr-Nd-Pb-Hf isotopic compositions. An enriched mantle end-member exists in the MORB-type depleted mantle source, as evidenced by correlations between epsilon Nd and SmN/YbN, Sr/Sr, and Eu/Eu. Recycled igneous oceanic crust that experienced plagioclase fractionation can account for the geochemically enriched end-member in the mantle source, based on the positive correlation of epsilon Nd vs. Sr/Sr* and Eu/Eu*. The recycled igneous oceanic crust plus minor amounts of pelagic sediments can also explain the origins of Indian-type mantle in the Celebes Sea. The E-MORBs have higher Zn/Mn and Zn/Fe ratios, and similar olivine Ni, Ca, and Mn contents as compared to global MORBs, which is also consistent with a recycled oceanic crust-derived, eclogite-rich, mantle source. This suggests recycled components contribute to the lithological and geochemical heterogeneity in the mantle beneath the Celebes Sea.
关键词	Mantle heterogeneity Eclogite Recycled oceanic crust Olivine Celebes Sea
DOI	10.1016/j.lithos.2022.106685
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050101]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020302]; National Natural Science Foundation of China[41888101]; National Natural Science Foundation of China[41876040]; Taishan Scholars Program of Shandong Province[tsqn201909157]
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
WOS类目	Geochemistry & Geophysics ; Mineralogy
WOS记录号	WOS:000799232900003
出版者	ELSEVIER
引用统计	被引频次：1[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/337002/179324
专题	深海极端环境与生命过程研究中心
通讯作者	Zhang, Guoliang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
第一作者单位	深海极端环境与生命过程研究中心
通讯作者单位	深海极端环境与生命过程研究中心
推荐引用方式 GB/T 7714	Wang, Shuai,Zhang, Guoliang. Geochemical constraints on source nature and recycled oceanic crust in the mantle of the Celebes Sea[J]. LITHOS,2022,418:12.
APA	Wang, Shuai,&Zhang, Guoliang.(2022).Geochemical constraints on source nature and recycled oceanic crust in the mantle of the Celebes Sea.LITHOS,418,12.
MLA	Wang, Shuai,et al."Geochemical constraints on source nature and recycled oceanic crust in the mantle of the Celebes Sea".LITHOS 418(2022):12.

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