Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body

Soumya Ray, Laurence A.J. Garvie, Vinai K. Rai, Meenakshi Wadhwa

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Iron isotopes record the physical parameters, such as temperature and redox conditions, during differentiation processes on rocky bodies. Here we report the results of a correlated investigation of iron isotope compositions and silicon contents of silicon-bearing metal grains from several aubritic meteorites. Based on their Fe isotopic and elemental Si compositions and thermal modelling, we show that these aubrite metals equilibrated with silicates at temperatures ranging from ~ 1430 to ~ 1640 K and likely sampled different depths within their asteroidal parent body. The highest temperature in this range corresponds to their equilibration at a minimum depth of up to ~ 35 km from the surface of the aubrite parent body, followed by brecciation and excavation by impacts within the first ~ 4 Myr of Solar System history.

Original languageEnglish (US)
Article number22552
JournalScientific reports
Volume11
Issue number1
DOIs
StatePublished - Dec 2021

ASJC Scopus subject areas

  • General

Fingerprint

Dive into the research topics of 'Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body'. Together they form a unique fingerprint.

Cite this