Mineralogy, petrology, geochemistry, and chronology of the Murrili (H5) meteorite fall: The third recovered fall from the Desert Fireball Network

Anderson, S. et al. (2021) Mineralogy, petrology, geochemistry, and chronology of the Murrili (H5) meteorite fall: The third recovered fall from the Desert Fireball Network. Meteoritics and Planetary Science, 56(2), pp. 241-259. (doi: 10.1111/maps.13615)

[img] Text
234544.pdf - Accepted Version
Restricted to Repository staff only until 12 February 2022.

589kB
[img] Text
234544Suppl.pdf - Supplemental Material
Restricted to Repository staff only until 12 February 2022.

1MB

Abstract

Murrili, the third meteorite recovered by the Desert Fireball Network, is analyzed using mineralogy, oxygen isotopes, bulk chemistry, physical properties, noble gases, and cosmogenic radionuclides. The modal mineralogy, bulk chemistry, magnetic susceptibility, physical properties, and oxygen isotopes of Murrili point to it being an H5 ordinary chondrite. It is heterogeneously shocked (S2–S5), depending on the method used to determine it, although Murrili is not obviously brecciated in texture. Cosmogenic radionuclides yield a cosmic ray exposure age of 6–8 Ma, and a pre‐atmospheric meteoroid size of 15–20 cm in radius. Murrili’s fall and subsequent month‐long embedment into the salt lake Kati Thanda significantly altered the whole rock, evident in its Mössbauer spectra, and visual inspection of cut sections. Murrili may have experienced minor, but subsequent, impacts after its formation 4475.3 ± 2.3 Ma, which left it heterogeneously shocked.

Item Type:Articles
Additional Information:This work was funded by the Australian Research Council (Grant: DP200102073).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Daly, Dr Luke
Authors: Anderson, S., Benedix, G.K., Forman, L.V., Daly, L., Greenwood, R.C., Franchi, I.A., Friedrich, J.M., Macke, R., Wiggins, S., Britt, D., Cadogan, J.M., Meier, M.M.M., Maden, C., Busemann, H., Welten, K.C., Caffee, M.W., Jourdan, F., Mayers, C., Kennedy, T., Godel, B., Esteban, L., Merigot, K., Bevan, A.W.R., Bland, P.A., Paxman, J., Towner, M.C., Cupak, M., Sansom, E.K., Howie, R., Devillepoix, H., Jansen‐Sturgeon, T., Stuart, D., and Strangway, D.
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Meteoritics and Planetary Science
Publisher:Wiley
ISSN:1086-9379
ISSN (Online):1945-5100
Published Online:12 February 2021
Copyright Holders:Copyright © 2021 The Meteoritical Society (MET)
First Published:First published in Meteoritics and Planetary Science 2021
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

University Staff: Request a correction | Enlighten Editors: Update this record