By Richard E. Wainerdi (Eds.)
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Additional resources for Analytical Chemistry in Space
Such "ages" are important to a knowledge of solar system origin and history. g. H, C, Ο, N, S, Si—in rocks have provided much information on rock-forming processes. g. limestone), and organic carbon from inorganic, in many cases. Similar isotope ratio studies of lunar materials may be of equal value. The proposed program does not end with the recognition and classification of the rock type and with the measurement of specific groups of trace elements. A complete chemical analysis can provide much additional information on what processes have operated on the planet.
Recognition of rock type is the primary objective. g. basalt versus granite, chondrite versus achondrite, etc. 32 L. F. HERZOG A possibly superior basis for such distinctions when, as in the present case, an analysis instrument of limited capabilities must necessarily be used, is the comparison of the ratios of certain key elements, rather than abundances per se, in the unknown against the known ratios in igneous rocks and meteorites. g. e. basaltic and granitic rocks (including acidic ash falls or flows), and/or chondritic meteorites.
The second sediment type which might be encountered is a lunar weathering product produced in situ from either igneous or meteoritic material, as a result of radiation damage together with spallation caused by the extreme temperature fluctuations. The changes induced by such processes would be dominantly physical rather than chemical, though selective loss of oxygen through sputtering could also have occurred. A few years ago it was suggested that tektites might be debris from meteoritic impacts on the Moon.
Analytical Chemistry in Space by Richard E. Wainerdi (Eds.)