Titlebar

Bibliografische Daten exportieren
Literatur vom gleichen Autor
plus auf ERef Bayreuth
plus bei Google Scholar

 

Highly siderophile elements were stripped from Earth’s mantle by iron sulfide segregation

Titelangaben

Rubie, David C. ; Laurenz, Vera ; Jacobson, Seth A. ; Morbidelli, Alessandro ; Palme, Herbert ; Vogel, Antje K. ; Frost, Daniel J.:
Highly siderophile elements were stripped from Earth’s mantle by iron sulfide segregation.
In: Science. Bd. 353 (9 September 2016) Heft 6304 . - S. 1141-1144.
ISSN 0036-8075
DOI: 10.1126/science.aaf6919

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Highly siderophile elements (HSEs) are strongly depleted in the bulk silicate Earth (BSE) but are present in near-chondritic relative abundances. The conventional explanation is that the HSEs were stripped from the mantle by the segregation of metal during core formation but were added back in near-chondritic proportions by late accretion, after core formation had ceased. Here we show that metal-silicate equilibration and segregation during Earth’s core formation actually increased HSE mantle concentrations because HSE partition coefficients are relatively low at the high pressures of core formation within Earth. The pervasive exsolution and segregation of iron sulfide liquid from silicate liquid (the “Hadean matte”) stripped magma oceans of HSEs during cooling and crystallization, before late accretion, and resulted in slightly suprachondritic palladium/iridium and ruthenium/iridium ratios.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Forschungseinrichtungen > Forschungszentren > Bayerisches Forschungsinstitut für Experimentelle Geochemie und Geophysik - BGI
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
Eingestellt am: 28 Apr 2017 08:43
Letzte Änderung: 28 Apr 2017 08:43
URI: https://eref.uni-bayreuth.de/id/eprint/36878