Computer Science
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44.1875p&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 44, Nov. 1980, p. 1875-1884.
Computer Science
18
Gas Analysis, Planetary Atmospheres, Planetary Composition, Rare Gases, Sedimentary Rocks, Abundance, Atmospheric Composition, Geochemistry, Mars Atmosphere, Meteoritic Composition, Xenon
Scientific paper
Experimental results for the trapped noble gas contents in shales show that the usual sedimentary rock pattern consists of progressive enrichment of the heavier gases. However, variations beyond an order of magnitude characterize abundance and composition, requiring multiple processes to explain the noble gas trapping. Noble gases occur in air in approximately 'planetary' proportions typical of meteorites, except for the deficiency of Xe; it is considered that atmospheric noble gases are planetary, the Xe deficiency in air being compensated by the inventory in sedimentary rocks. This theory is accepted, but alternative hypotheses that Xe has failed to become part of the atmosphere or that the total terrestrial noble gas inventory is not planetary cannot be excluded.
Honda Makoto
Ozima Minoru
Podosek Frank A.
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