@article{8d69eb8eb390474d8582c77cbedfa0f3,
title = "Correlated iron isotopes and silicon contents in aubrite metals reveal structure of their asteroidal parent body",
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.",
author = "Soumya Ray and Garvie, {Laurence A.J.} and Rai, {Vinai K.} and Meenakshi Wadhwa",
note = "Funding Information: We thank R. Hines and S. J. Romaniello for their invaluable assistance in the Isotope Cosmochemistry and Geochronology (ICGL) at ASU. We also thank the two anonymous reviewers for their insightful comments that helped to improve the manuscript. We acknowledge the use of facilities in the Eyring Materials Center at Arizona State University, and are grateful to the staff at these facilities for their assistance. This work was supported by NASA Emerging Worlds Grant (NNX15AH41G) to MW, NASA Earth and Space Science Fellowship (80NSSC18K1269) to SR and MW, and a NASA Emerging Worlds Grant (NNX17AE56G) to L.A.J.G. We thank Carl Agee at the Institute of Meteoritics (UNM) for providing us with metal nodules NC7-12. Publisher Copyright: {\textcopyright} 2021, The Author(s).",
year = "2021",
month = dec,
doi = "10.1038/s41598-021-99160-9",
language = "English (US)",
volume = "11",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",
}