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Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..49..117w&link_type=abstract
Earth and Planetary Science Letters, vol. 49, no. 1, Aug. 1980, p. 117-131. Research supported by the Australian Institute of N
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7
Argon Isotopes, Chondrites, Meteoritic Composition, Radioactive Age Determination, Collision Parameters, Crystallization, Degassing, Feldspars, Impact Damage, Meteorites, H5 Chondrites, Kirin Meteorite, Thermal History, Ages, Dating Techniques, Isotopic Ratios, Argon, Crystallization, Collisions, Parent Bodies, Outgassing, Heating, Comparisons, Spectrum, Experiments, Procedure, Data, Analysis, Temperatures, Models, Exposure Ages, Samples
Scientific paper
The paper discusses the Kirin meteorite which is large chondrite from Kirin Province, China. Two largest fragments contained Ar-40/Ar-39 approximate fusion ages of 3.63 and 2.78 b.y.; the age spectra show diffusional Ar loss profiles. The Ar-40/Ar-39 found in a gas released at low temperature were about 2.2 b.y. for the K-1 and 0.5 b.y. fragments indicating that this meteorite may have undergone two discrete collisional events which resulted in degassing of radiogenic argon. Calculations from Ar-38 data show exposure ages for samples K-1 and K-2 of about 5 m.y. similar to other H chondrites.
Harrison Matthew T.
McDougall Ian
Tetley N.
Wang Shuang
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