Abstract
The geological literature is replete with models for the differentiation of magmas that occur on Earth, the Moon, and other terrestrial bodies. The models involve processes such as crystal/liquid fractionation (Allégre and Minster, 1978), diffusion (Wright et al., 1983), magma chamber replenishment (O’Hara, 1977), magma mixing (McBirney,1980) and assimilation (Grove et al., 1982). However, few of these models include a quantitative treatment of the effects of magmatic vapor evolution on melt, crystal, or vapor chemistry, although qualitative appeals to such processes are commonplace. Vapor evolution has been cited as a possible explanation for aplite chemistry (Fourcade and Allegre, 1981), rubidium depletion in igneous amphibole (Chivas, 1981), magmatic oxidation effects (Chivas, 1981), fluorine depletion in suites of igneous rocks (McMillan, 1982) and as a source for ore metals in many ore deposits (c.f. Burnham, 1979). In his Evolution of the Igneous Rocks, N. L. Bowen (1928) states: “To many petrologists a volatile component is exactly like a Maxwell demon; it does just what one may wish it to do.” Apparently his demon is alive and well, and a quantitative model of vapor evolution is needed to test the above hypotheses.
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Candela, P.A. (1986). Generalized Mathematical Models for the Fractional Evolution of Vapor from Magmas in Terrestrial Planetary Crusts. In: Saxena, S.K. (eds) Chemistry and Physics of Terrestrial Planets. Advances in Physical Geochemistry, vol 6. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-4928-3_10
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DOI: https://doi.org/10.1007/978-1-4612-4928-3_10
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