 | | Journal (article/letter/editorial) | | of alkali feldspar and less commonly plagioclase in a matrix of plagioclase, alkali feldspar, hedenbergite...ratio of 9 to 1 of feldspar to pyroxene (Farquhar et al. 1993). The feldspar group is a good approximation...(Fuhrman et al. 1988). The greater abundance of feldspar compared to pyroxene means high temperature subsolidus...d18O heterogeneity within each sample Quartz K-feldspar Plagioclase Augite Olivine Ilmenite Apatite Amphibole...3 0.7 100.00 This value includes some ternary feldspar inter-growth 89 between these two mineral phases |  | | Book | | Economic Geology from the University of Hamburg (Germany), where he also served as a Visiting Professor...coloured by chromium and sometimes vanadium. The first group of authors in their review proposed an enhanced...II: K-feldspar (microcline), quartz, and albite; Zone III: perthite crystals (blocky feldspar zone);...3a–c); Zone II hosting homogeneous medium-grained K-feldspar (microcline) accompanied by quartz and albite;...exclusively of large perthite crystals (blocky feldspar zone); and Zone IV, i.e., a monomineralic nucleus |  | | Report (volume) | | estimating the frequency shift associated with each group on 18 O substitution. Importantly, she applied the...compositional variation in that mineral or mineral group affects fractionation behavior. Compositional effects...F↔OH Example plagioclase jadeite-diopside alkali feldspar pyroxene, garnet garnet pyroxene garnet garnet...strongly-bonded and weakly-bonded cations, and the OH- group in hydrous silicates is treated separately. The...1973) of oxygen isotope geothermometers comprising feldspar, and one of quartz, muscovite or magnetite. They |
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