Variable microstructural response of baddeleyite to shock metamorphism in young basaltic shergottite NWA 5298 and improved U-Pb dating of Solar System events
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- 作者：James R. Darlinga ; james.darling@port.ac.uk" class="auth_mail" title="E-mail the corresponding author ; Desmond E. Moserb ; Ivan R. Barkerb ; Kim T. Taitc ; Kevin R. Chamberlaind ; Axel K. Schmitte ; f ; Brendt C. Hydec
- 关键词：Mars ; shergottite ; geochronology ; baddeleyite ; EBSD ; uranium&ndash ; lead
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 June 2016
- 年：2016
- 卷：444
- 期：Complete
- 页码：1-12
- 全文大小：5125 K
文摘
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Nanoanalysis reveals a wide range of new shock-metamorphic phenomena in baddeleyite.
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Systematic microstructural evolution in baddeleyite from a single shock event.
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Shock microstructures correlate with the degree of U–Pb age resetting.
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A refined crystallization age for NWA 5298 of 175±30 Ma.
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At least some shergottites record relatively recent (<200 Ma) volcanism on Mars.