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Oxygen isotope composition of meteoritic ablation debris from the Transantarctic Mountains: Constraining the parent body and implications for the impact scenario

van Ginneken, M., Suavet, C., Cordier, C., Folco, L., Rochette, P., Sonzogni, C., Perchiazzi, N. (2012) Oxygen isotope composition of meteoritic ablation debris from the Transantarctic Mountains: Constraining the parent body and implications for the impact scenario. Meteoritics & Planetary Science, 47 (11). pp. 1738-1747. ISSN 1086-9379. E-ISSN 1945-5100. (doi:10.1111/maps.12011) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:88126)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL
https://doi.org/10.1111/maps.12011

Abstract

Microscopic meteoritic ablation spheres recently found on top of the Victoria Land in Transantarctic Mountains, and in the L2 Dome C and DF2691 Dome Fuji ice core layers document a major impact of a 108 kg (or larger) cosmic body in the Antarctic region about 480 kyr ago. Although of broadly chondritic composition, the exact nature of the impactor is unknown, and whether the impactor struck the Antarctic ice sheet or exploded in the atmosphere is a matter of debate. Based on oxygen isotope analyses of ablation spheres from the Transantarctic Mountains by means of IR‐laser fluorination coupled with mass spectrometry, we suggest that they represent the debris of an atmospheric airburst of a primitive asteroid of CV, CO, or CK composition, or a comet with composition similar to the short‐period comet 81P/Wild 2.

Item Type: Article
DOI/Identification number: 10.1111/maps.12011
Subjects: Q Science > QE Geology > QE515 Geochemistry
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Matthias van Ginneken
Date Deposited: 14 May 2021 10:11 UTC
Last Modified: 25 Jan 2022 22:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/88126 (The current URI for this page, for reference purposes)
van Ginneken, M.: https://orcid.org/0000-0002-2508-7021
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