Space history of the High Possil and Strathmore meteorites from Ne and Ar isotopes

Carracedo, A., Stuart, F. M. , Di Nicola, L. and Faithfull, J. W. (2022) Space history of the High Possil and Strathmore meteorites from Ne and Ar isotopes. Scottish Journal of Geology, 58(1), sjg2022-00. (doi: 10.1144/sjg2022-002)

Abstract

The High Possil and Strathmore L6 chondrites fell in Scotland in 1804 and 1917 respectively. Unravelling their cosmic-ray exposure (CRE) ages provides crucial information about when they were ejected from the parent body, how they were delivered to Earth and is ultimately important for understanding the dynamics of small bodies in the solar system. Here we use new measurements of the Ne and Ar isotopic composition to determine CRE ages of both meteorites. Duplicated cosmogenic 21Ne and 38Ar concentrations yield CRE ages of 44.6 ± 4.6 Ma for High Possil and 15.4 ± 1.3 Ma for Strathmore. These coincide with well-established peaks in the ejection record for the L6 chondrites. They yield 40Ar gas retention ages in excess of 3.15 Ga, which is consistent with both meteorites originating at depth within the parent body at the time of asteroidal break-up.Thematic collection: This article is part of the Early Career Research collection available at: https://www.lyellcollection.org/cc/SJG-early-career-research

• Item Type: Articles
• Additional Information: This project was part of AC's PhD and was supported by the Natural Environment Research Council and Scottish Universities Environmental Research Centre (SUERC).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Faithfull, Dr John and Di Nicola, Dr Luigia and Carracedo, Dr Ana and Stuart, Professor Fin

Creator Roles

Carracedo, A.: Data curation, Formal analysis, Investigation, Methodology, Writing – original draft
Stuart, F.: Project administration, Supervision, Writing – review and editing
Di Nicola, L.: Formal analysis, Methodology, Writing – review and editing
Faithfull, J.: Resources, Writing – review and editing

• Authors: Carracedo, A., Stuart, F. M., Di Nicola, L., and Faithfull, J. W.
• Subjects: Q Science > QB Astronomy; Q Science > QE Geology
• College/School: College of Science and Engineering > Scottish Universities Environmental Research Centre; University Services > Library and Collection Services > Museum and Art Gallery
• Journal Name: Scottish Journal of Geology
• Publisher: Geological Society Publishing House
• ISSN: 0036-9276
• ISSN (Online): 2041-4951
• Published Online: 09 June 2022
• Copyright Holders: Copyright © 2022 The Authors
• First Published: First published in Scottish Journal of Geology 58(1):sjg2022-00
• Publisher Policy: Reproduced under a Creative Commons License