气候变化领域集成服务门户(CCPortal): Early Moon formation inferred from hafnium

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DOI	10.1038/s41561-019-0398-3
	Early Moon formation inferred from hafnium–tungsten systematics
	Thiemens M.M.; Sprung P.; Fonseca R.O.C.; Leitzke F.P.; Münker C.
发表日期	2019
ISSN	17520894
卷号	12 期号:9
英文摘要	The date of the Moon-forming impact places an important constraint on Earth’s origin. Lunar age estimates range from about 30 Myr to 200 Myr after Solar System formation. Central to this age debate is the greater abundance of 182W inferred for the silicate Moon than for the bulk silicate Earth. This compositional difference has been explained as a vestige of less late accretion to the Moon than to the Earth after core formation. Here we present high-precision trace element composition data from inductively coupled plasma mass spectrometry for a wide range of lunar samples. Our measurements show that the Hf/W ratio of the silicate Moon is higher than that of the bulk silicate Earth. By combining these data with experimentally derived partition coefficients, we found that the 182W excess in lunar samples can be explained by the decay of the now extinct 182Hf to 182W. 182Hf was only extant for the first 60 Myr after the Solar System formation. We conclude that the Moon formed early, approximately 50 Myr after the Solar System, and that the excess 182W of the silicate Moon is unrelated to late accretion. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	experimental study; lunar mantle; Moon; silicate; solar system; trace element; tungsten
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/124616
作者单位	Institut für Geologie und Mineralogie, Universität zu Köln, Köln, Germany; Hot Laboratory Division (AHL), Paul Scherrer Institut, Villigen, Switzerland; Steinmann Institut, Universität Bonn, Bonn, Germany; Laboratoire G-Time, Département Géosciences, Environnement et Société, Université Libre de Bruxelles, Brussels, Belgium; Isotope Geology Laboratory, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
推荐引用方式 GB/T 7714	Thiemens M.M.,Sprung P.,Fonseca R.O.C.,等. Early Moon formation inferred from hafnium–tungsten systematics[J],2019,12(9).
APA	Thiemens M.M.,Sprung P.,Fonseca R.O.C.,Leitzke F.P.,&Münker C..(2019).Early Moon formation inferred from hafnium–tungsten systematics.Nature Geoscience,12(9).
MLA	Thiemens M.M.,et al."Early Moon formation inferred from hafnium–tungsten systematics".Nature Geoscience 12.9(2019).