O-H_Stable_Isotopes

22 37 500 800 themp bottinga javoy 1973 1975 muscovite

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Unformatted text preview: emp = empirical, ext = estimated, exp = experimental Wednesday, 15 August, 12 O Isotope Fractionation Factors Mineral 1000 lnα A* B* T Range (°C) Method** Reference Garnet-H2O 1.22 -3.7 500-800 th/emp Bottinga & Javoy (1973, 1975) Muscovite -H2O 2.38 1.90 -3.89 -3.1 400-650 500-800 exp th/emp O'Neil & Taylor (1969) Bottinga & Javoy (1973) Biotite-H2O 0.4 -3.1 500-800 th/emp Bottinga & Javoy (1973) Chlorite-H2O 1.560 -4.723 (50-500) (50-500) emp est Wenner & Taylor (1971) Yeh & Savin (1976) * 1000 lnα = A(106/T2) + B ** th = theoretical, emp = empirical, ext = estimated, exp = experimental Wednesday, 15 August, 12 O Isotope Fractionation Factors 1000 lnα A* B* Mineral T Range (°C) Method** Reference Plagioclase 3.131.04X -3.7 500-800 th/emp Bottinga & Javoy (1973) Albite 2.39 1.59 -2.51 -1.16 400-500 500-800 exp Matsuhisa et al. (1979) Anorthite 1.49 1.04 -2.81 -2.01 400-500 500-800 exp Matsuhisa et al. (1979) K-feldspar 2.91 -3.41 350-800 exp O'Neil & Taylor (1967) * 1000 lnα = A(106/T2) + B, X = mole % An ** th = theoretical, emp = empirical, ext = estimated, exp = experimental Wednesday, 15 August, 12 O Isotope Fractionations Taylor 1997 in Geochemistry of Hydrothermal Ore Deposits Wednesday, 15 August, 12 Example • Find the temperature of a magma as deduced from the oxygen isotopes of quartz and magnetite when δ18Oquartz = 5...
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This document was uploaded on 03/06/2014 for the course ES 4502 at Memorial University.

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