Citation
Dd. Wang et Rt. Wang, Noble gas and cosmic-ray exposure age of Juancheng chondrite, CHIN SCI B, 44(12), 1999, pp. 1142-1143
Citations number
5
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
10016538
→ ACNP
Volume
44
Issue
12
Year of publication
1999
Pages
1142 - 1143
Database
ISI
SICI code
1001-6538(199906)44:12<1142:NGACEA>2.0.ZU;2-V
Abstract
The analytical results of noble gase in recently fallen Juancheng chondrite
indicate that cosmic-ray ages of cosmogenic nuclei of He-3, Ne-21 and Ar-3
8 are 5.1, 5.0 and 5.8 Ma, respectively, averaging 5.3 Ma. The gas retentio
n ages radiogenic nuclei of He-4 and Ar-40 are 3 200 and 4 200 Ma, respecti
vely. The average cosmic-ray age shows that it has occurred at breakup of t
he meteoroid from its parent body by impact before 5.3 Ma.