气候变化领域集成服务门户(CCPortal): An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean

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DOI	10.1038/s41561-018-0292-4
	An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean
	Park S.-H.; Langmuir C.H.; Sims K.W.W.; Blichert-Toft J.; Kim S.-S.; Scott S.R.; Lin J.; Choi H.; Yang Y.-S.; Michael P.J.
发表日期	2019
ISSN	17520894
卷号	12 期号:3
英文摘要	The mantle sources of mid-ocean ridge basalts beneath the Indian and Pacific oceans have distinct isotopic compositions with a long-accepted boundary at the Australian–Antarctic Discordance along the Southeast Indian Ridge. This boundary has been widely used to place constraints on large-scale patterns of mantle flow and composition in the Earth’s upper mantle. Sampling between the Indian and Pacific ridges, however, has been lacking, especially along the remote 2,000 km expanse of the Australian–Antarctic Ridge. Here we present Sr, Nd, Hf and Pb isotope data from this region that show the Australian–Antarctic Ridge has isotopic compositions distinct from both the Pacific and Indian mantle domains. These data define a separate Zealandia–Antarctic domain that appears to have formed in response to the deep mantle upwelling and ensuing volcanism that led to the break-up of Gondwana 90 million years ago, and currently persists at the margins of the Antarctic continent. The relatively shallow depths of the Australian–Antarctic Ridge may be the result of this deep mantle upwelling. Large offset transforms to the east may be the boundary with the Pacific domain. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	Gondwana; isotopic composition; mantle upwelling; mid-ocean ridge; upper mantle; volcanism; Indian Ocean; Mid-Indian Ridge; Pacific Ocean; Southeast Indian Ridge; Southern Ocean
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/124711
作者单位	Korea Polar Research Institute, Incheon, South Korea; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; Department of Geology and Geophysics, University of Wyoming, Laramie, WY, United States; Laboratoire de Géologie de Lyon, Ecole Normale Supérieure de Lyon and Université Claude Bernard Lyon 1, CNRS UMR 5276, Lyon, France; Department of Geology and Earth Environmental Sciences, Chungnam National University, Daejeon, South Korea; Departement of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Department of Geosciences, University of Tulsa, Tulsa, OK, United States
推荐引用方式 GB/T 7714	Park S.-H.,Langmuir C.H.,Sims K.W.W.,等. An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean[J],2019,12(3).
APA	Park S.-H..,Langmuir C.H..,Sims K.W.W..,Blichert-Toft J..,Kim S.-S..,...&Michael P.J..(2019).An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean.Nature Geoscience,12(3).
MLA	Park S.-H.,et al."An isotopically distinct Zealandia–Antarctic mantle domain in the Southern Ocean".Nature Geoscience 12.3(2019).