Computer Science
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..72..299s&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 72, no. 2-3, March 1985, p. 299-303.
Computer Science
1
Chondrites, Meteoritic Composition, Mobility, Trace Elements, Argon Isotopes, Chemical Composition, Fractionation, Metamorphism (Geology), Neutron Activation Analysis, Temperature Effects, Meteorites, Jilin, H5 Chondrites, Stone Meteorites, Samples, Meteorite, Trace Elements, Mobility?, Radiochemistry, Neutron Activation Analysis, Rnaa, Comparisons, Thermal Effects, Temperature, Formation, Shock, Parent Bodies, Cadmium, Rubidium
Scientific paper
A determination is conducted of ppm-ppt levels of Co, Se, Ga, Rb, Cs, Te, Bi, Ag, In, Tl, Zn and Cd (arranged empirically in order of increasing mobility at 1000 C) by radiochemical neutron activation analysis in eight Jilin samples of known Ar-40 content and a large vein from one of these. The trace element contents of the vein do not differ markedly from those of Jilin whole-rock samples. Only Rb correlates with Ar-40, possibly due to chance. All elements but Cd are present at levels similar to these in H4-6 chondrites with long K/Ar age (i.e., presumably mildly shocked). These levels are low relative to those in analogous L4-6 chondrites suggesting that H chondrites formed and/or evolved under higher pre-shock temperatures than did mildly shocked L chondrites. Time-temperature conditions during shock-loading of Jilin parent material were mild relative to those in strongly shocked L chondrites, being sufficient at most only to mobilize Cd.
Lipschutz Michael E.
Sakuragi Y.
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