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, 2009 Contributions to Mineralogy and Petrology, 1980
An unusual association of chromite and hornblende was found in the spessartites of andesite composition, occurring as a dike swarm associated with a Cretaceous granite batholith. The spessartites are largely porphyritic with phenocrysts of either hornblende or augite. One dike, comprising a finegrained spessartite, exhibits distinct chilled selvages of
Suzuki, Kazuhiro, Shiraki, Keiichi
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An unusual association of chromite and hornblende was found in the spessartites of andesite composition, occurring as a dike swarm associated with a Cretaceous granite batholith. The spessartites are largely porphyritic with phenocrysts of either hornblende or augite. One dike, comprising a finegrained spessartite, exhibits distinct chilled selvages of
Suzuki, Kazuhiro, Shiraki, Keiichi
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Spectroscopic Analysis of Nigerian Gem-grade Yellow Garnet Varieties and their Color Differences
Current Analytical ChemistryResearch on yellow garnets of different shades regarding their varieties, colors, as well as chemical states, and contents of coloring ions is somewhat lacking.
Ming Li +4 more
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Nature and origin of calc-alkaline lamprophyres: minettes, vogesites, kersantites and spessartites
Transactions of the Royal Society of Edinburgh: Earth Sciences, 1984ABSTRACTCalc-alkaline lamprophyres are porphyritic dyke-rocks, richer in amphibole, biotite, ultramark elements (Mg, Cr, Ni) and incompatible elements (K, F, P, Rb, Sr, Zn, Nb, Ba, REE, Th, U) than other rocks of comparable colour index (35–67) or % SiO2(46–57). Field and petrological criteria are suggested for identifying them uniquely.
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