气候变化领域集成服务门户(CCPortal): The Mantle Transition Zone Hosts the Missing HIMU Reservoir Beneath Eastern China

CCPortal

DOI	10.1029/2020GL087260
	The Mantle Transition Zone Hosts the Missing HIMU Reservoir Beneath Eastern China
	Qian S.-P.; Nichols A.R.L.; Zhang L.; Xu Y.-G.; Li J.; Guo Y.-L.; Ren Z.-Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	The Earth's mantle shows large-scale geochemical heterogeneities bounded by several identifiable end-member compositions. However, the origin of extreme mantle reservoirs, for example, high 238U/204Pb (HIMU), and their location in the Earth's interior remains poorly constrained. Clinopyroxenes from late Cenozoic Wudi lavas in eastern China have heterogeneous Pb isotopic compositions, even though the erupted lavas are isotopically homogeneous. Our new results provide, to our knowledge, the first evidence for the existence of a HIMU-like component in the sources of late Cenozoic lavas. Analyses of olivines and their host lavas indicate that the basaltic melts are derived from partial melting of carbonated peridotite. The HIMU source is likely to be younger than 700 Ma old and related to subduction events of the Paleo-Asian ocean. In addition to deep and ancient recycling, storage of a metasomatically produced mantle reservoir in the mantle transition zone may be an important mechanism for developing extreme isotopic signatures. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Silicate minerals; Earth's interior; Geochemical heterogeneity; Isotopic composition; Isotopic signatures; Mantle reservoirs; Mantle transition zone; Paleo-Asian Ocean; Partial melting; Isotopes; Cenozoic; lava; mantle; partial melting; reservoir; subduction zone; transition zone; China; Shandong; Wudi
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170380
作者单位	State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; State Key Laboratory of Marine Geology, Tongji University, Shanghai, China; Department of Geological Sciences, University of Canterbury, Christchurch, New Zealand; Institutions of Earth Science, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Qian S.-P.,Nichols A.R.L.,Zhang L.,et al. The Mantle Transition Zone Hosts the Missing HIMU Reservoir Beneath Eastern China[J],2020,47(9).
APA	Qian S.-P..,Nichols A.R.L..,Zhang L..,Xu Y.-G..,Li J..,...&Ren Z.-Y..(2020).The Mantle Transition Zone Hosts the Missing HIMU Reservoir Beneath Eastern China.Geophysical Research Letters,47(9).
MLA	Qian S.-P.,et al."The Mantle Transition Zone Hosts the Missing HIMU Reservoir Beneath Eastern China".Geophysical Research Letters 47.9(2020).