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DOI	10.1038/s41561-019-0348-0
	An isotopically depleted lower mantle component is intrinsic to the Hawaiian mantle plume
	DeFelice C.; Mallick S.; Saal A.E.; Huang S.
发表日期	2019
ISSN	17520894
卷号	12 期号:6
英文摘要	Most ocean island basalts sample an isotopically depleted mantle component, but the origin of this component is unclear. It may come from either the entrained upper mantle or from a reservoir intrinsic to the plume, sourced from the lower mantle. For Hawaii, the isotopically depleted component is primarily sampled during the secondary rejuvenated-stage volcanism, 0.5–2 million years after the initial shield-stage volcanism. However, it is also inferred in shield and post-shield lavas. We analyse the radiogenic isotopic and trace element compositions of a suite of Mauna Kea shield-stage tholeiites, and found that they have the same isotopic compositions as rejuvenated-stage lavas. We use trace element models to show that these shield-stage basalts can be explained as higher degree partial melts of a rejuvenated-stage source. Our data, therefore, show that the depleted rejuvenated-stage component was directly sampled during shield-stage volcanism. The common source for both shield-stage and secondary rejuvenated volcanism implies that the depleted rejuvenated component is intrinsic to the Hawaiian mantle plume. It is further inferred that the mantle region from which the Hawaiian plume originates, probably in the lower mantle, is also isotopically depleted, similar but not identical to the upper mantle. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	isotopic composition; lower mantle; mantle plume; ocean island basalt; trace element; upper mantle; volcanism; Hawaii [(ISL) Hawaiian Islands]; Hawaii [United States]; Hawaiian Islands; Mauna Kea
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124664
作者单位	University of Nevada, Las Vegas, Las Vegas, NV, United States; Brown University, Providence, RI, United States
推荐引用方式 GB/T 7714	DeFelice C.,Mallick S.,Saal A.E.,et al. An isotopically depleted lower mantle component is intrinsic to the Hawaiian mantle plume[J],2019,12(6).
APA	DeFelice C.,Mallick S.,Saal A.E.,&Huang S..(2019).An isotopically depleted lower mantle component is intrinsic to the Hawaiian mantle plume.Nature Geoscience,12(6).
MLA	DeFelice C.,et al."An isotopically depleted lower mantle component is intrinsic to the Hawaiian mantle plume".Nature Geoscience 12.6(2019).