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40 Ar‐ 39 Ar dating of the H3 chondrite Sainte Rose
Author(s) -
Stephan Thomas,
Jessberger Elmar K.
Publication year - 1992
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1992.tb01080.x
Subject(s) - meteorite , chondrite , rose (mathematics) , analytical chemistry (journal) , mineralogy , geology , chemistry , radiochemistry , astrobiology , physics , environmental chemistry , geometry , mathematics
— A whole rock sample from the H3 chondrite Sainte Rose, which was discovered in 1983, was dated with the 40 Ar‐ 39 Ar technique. From the K/Ca spectrum and from an analysis of the 39 Ar recoil effect we conclude that this meteorite has at least two distinguishable K‐carriers: a low temperature, high‐K/Ca, fine‐grained carrier with a typical grain size of about 2 μm and a high temperature, low‐K/Ca, more coarse‐grained carrier. The K‐Ar clocks of both were started 4.40 ± 0.01 Ga ago.