Mathematics – Logic
Scientific paper
May 1954
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1954gecoa...5..225g&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 5, Issue 5, pp.225-242
Mathematics
Logic
3
Scientific paper
Physical and chemical processes which may lead to variations in the isotopic content of rocks are discussed in this paper, with special emphasis given to the processes of chemical exchange which may occur during the early stages of formation. Quantitative calculations deriving from physical understanding of these mechanisms have been applied whenever possible to the case of silicon and lead to certain conclusions relating the isotopic abundances of silicon to the geological history of the mineral. They are: (i) limits may be calculated for the isotopic content of rocks which formed in equilibrium from a common magma, (ii) it is unlikely that diffusion processes play any part in the separation of silicon isotopes, either in the solid or liquid state, (iii) analysis of abundances in a given mineral can reveal whether or not sedimentation during its history is a necessary hypothesis. The paper is entirely theoretical and except for a few minor extensions to existing methods, it contains no original developments.
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