Parent bodies of L and H chondrites: Times of catastrophic events

Abstract— An analysis of the distribution of 3 He and 4 He in L and H chondrites has shown that the parent body of L chondrites underwent a catastrophic collision in space 340 ± 50 Ma ago. This age differs considerably from the collision age of 520 ± 60 Ma given previously (Heymann, 1967). The paren...

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Bibliographic Details
Published in:Meteoritics & Planetary Science
Main Author: ALEXEEV, V. A.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1998
Subjects:
Space and Planetary Science
Geophysics
Antarctic
Antarc*
Online Access:http://dx.doi.org/10.1111/j.1945-5100.1998.tb01616.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1998.tb01616.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1998.tb01616.x
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Summary:Abstract— An analysis of the distribution of 3 He and 4 He in L and H chondrites has shown that the parent body of L chondrites underwent a catastrophic collision in space 340 ± 50 Ma ago. This age differs considerably from the collision age of 520 ± 60 Ma given previously (Heymann, 1967). The parent body of H chondrites may also have undergone local heating and degassing ∼200 Ma ago. Data for L chondrites argue in favour of Antarctic and non‐Antarctic meteorites having originated from a common parent body.

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