Ruthenium isotope vestige of Earth&#39;s pre-late-veneer mantle preserved in Archaean rocks

doi:10.1038/s41586-020-2069-3

GSTDTAP > 地球科学

DOI	10.1038/s41586-020-2069-3
	Ruthenium isotope vestige of Earth's pre-late-veneer mantle preserved in Archaean rocks
	Abadie, Valerie 1,2,3; Kim, Sangman M.3,4,5; Lejeune, Thomas 1,2; Palanski, Brad A.6; Ernest, Jordan D.3,4; Tastet, Olivier 7; Voisine, Jordan 3,4; Discepolo, Valentina 3; Marietta, Eric, V 8,9,10; Hawash, Mohamed B. F.7,11; Ciszewski, Cezary 3,4; Bouziat, Romain 3,4; Panigrahi, Kaushik 3; Horwath, Irina 8; Zurenski, Matthew A.3; Lawrence, Ian 3; Dumaine, Anne 7; Yotova, Vania 7; Grenier, Jean-Christophe 7; Murray, Joseph A.8; Khosla, Chaitan 6,12,13; Barreiro, Luis B.7,14,15; Jabri, Bana 3,4,16,17,18
	2020-03-11
发表期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2020
卷号	579 期号:7798 页码:240-+
文章类型	Article
语种	英语
国家	Germany; Denmark; Wales; Japan; USA; Australia
英文关键词	The accretion of volatile-rich material from the outer Solar System represents a crucial prerequisite for Earth to develop oceans and become a habitable planet(1-4). However, the timing of this accretion remains controversial(5-8). It has been proposed that volatile elements were added to Earth by the late accretion of a late veneer consisting of carbonaceous-chondrite-like material after core formation had ceased(6,9,10). This view could not be reconciled with the ruthenium (Ru) isotope composition of carbonaceous chondrites(5,11), which is distinct from that of the modern mantle(12), or of any known meteorite group(5). As a possible solution, Earth' s pre-late-veneer mantle could already have contained a fraction of Ru that was not fully extracted by core formation(13). The presence of such pre-late-veneer Ru can only be established if its isotope composition is distinct from that of the modern mantle. Here we report the first high-precision, mass-independent Ru isotope compositions for Eoarchaean ultramafic rocks from southwest Greenland, which display a relative Ru-100 excess of 22 parts per million compared with the modern mantle value. This Ru-100 excess indicates that the source of the Eoarchaean rocks already contained a substantial fraction of Ru before the accretion of the late veneer. By 3.7 billion years ago, the mantle beneath southwest Greenland had not yet fully equilibrated with late accreted material. Otherwise, no Ru isotopic difference relative to the modern mantle would be observed. If constraints from other highly siderophile elements besides Ru are also considered(14), the composition of the modern mantle can only be reconciled if the late veneer contained substantial amounts of carbonaceous-chondrite-like materials with their characteristic Ru-100 deficits. These data therefore relax previous constraints on the late veneer and are consistent with volatile-rich material from the outer Solar System being delivered to Earth during late accretion.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000519378900024
WOS关键词	HIGHLY SIDEROPHILE ELEMENT ; SOUTHERN WEST GREENLAND ; ISUA SUPRACRUSTAL BELT ; PLATINUM-GROUP ; ULTRAMAFIC ROCKS ; BUSHVELD COMPLEX ; W-182 EVIDENCE ; 3.8 GA ; SILICATE ; DIFFERENTIATION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/249245
专题	地球科学资源环境科学
作者单位	1.Univ Montreal, Fac Med, Dept Microbiol Infectiol & Immunol, Montreal, PQ, Canada; 2.Univ Montreal, St Justine Hosp, Res Ctr, Montreal, PQ, Canada; 3.Univ Chicago, Dept Med, 5841 S Maryland Ave, Chicago, IL 60637 USA; 4.Univ Chicago, Comm Immunol, Chicago, IL 60637 USA; 5.Univ San Francisco, Dept Biol, San Francisco, CA USA; 6.Stanford Univ, Dept Chem, Stanford, CA 94305 USA; 7.Univ Montreal, Res Ctr, St Justine Hosp, Dept Genet, Montreal, PQ, Canada; 8.Mayo Clin, Div Gastroenterol & Hepatol, Rochester, MN USA; 9.Mayo Clin, Dept Immunol, Rochester, MN USA; 10.Mayo Clin, Dept Dermatol, Rochester, MN USA; 11.Univ Montreal, Fac Med, Dept Biochem, Montreal, PQ, Canada; 12.Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA; 13.Stanford Univ, Stanford ChEM H, Stanford, CA 94305 USA; 14.Univ Montreal, Fac Med, Dept Pediat, Montreal, PQ, Canada; 15.Univ Chicago, Dept Med, Sect Genet Med, 5841 S Maryland Ave, Chicago, IL 60637 USA; 16.Univ Chicago, Dept Pediat, Sect Gastroenterol Hepatol & Nutr, Chicago, IL 60637 USA; 17.Univ Chicago, Dept Pathol, 5841 S Maryland Ave, Chicago, IL 60637 USA; 18.Univ Chicago, Celiac Dis Ctr, Chicago, IL 60637 USA
推荐引用方式 GB/T 7714	Abadie, Valerie,Kim, Sangman M.,Lejeune, Thomas,et al. Ruthenium isotope vestige of Earth's pre-late-veneer mantle preserved in Archaean rocks[J]. NATURE,2020,579(7798):240-+.
APA	Abadie, Valerie.,Kim, Sangman M..,Lejeune, Thomas.,Palanski, Brad A..,Ernest, Jordan D..,...&Jabri, Bana.(2020).Ruthenium isotope vestige of Earth's pre-late-veneer mantle preserved in Archaean rocks.NATURE,579(7798),240-+.
MLA	Abadie, Valerie,et al."Ruthenium isotope vestige of Earth's pre-late-veneer mantle preserved in Archaean rocks".NATURE 579.7798(2020):240-+.