Noble gases in twenty Yamato H-chondrites: Comparison with Allan Hills chondrites and modern falls

Concentration and isotopic composition of noble gases have been measured in 20 H-chrondrites found on the Yamato Mountains ice fields in Antarctica. The distribution of exposure ages as well as of radiogenic He-4 contents is similar to that of H-chrondrites collected at the Allan Hills site. Further...

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Bibliographic Details
Main Authors: Scherer, P., Loeken, TH., Schultz, L.
Format: Other/Unknown Material
Language:unknown
Published: 1993
Subjects:
ASTROPHYSICS
Allan Hills
Antarctic
Yamato
Antarc*
Antarctica
Online Access:http://hdl.handle.net/2060/19940011888
Description
Summary:Concentration and isotopic composition of noble gases have been measured in 20 H-chrondrites found on the Yamato Mountains ice fields in Antarctica. The distribution of exposure ages as well as of radiogenic He-4 contents is similar to that of H-chrondrites collected at the Allan Hills site. Furthermore, a comparison of the noble gas record of Antarctic H-chrondrites and finds or falls from non-Antarctic areas gives no support to the suggestion that Antarctic H-chrondrites and modern falls derive from differing interplanetary meteorite populations.

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