SYNOPSISThe well-known Ailsa Craig microgranite has been found to contain aenigmatite as well as a riebeckitic amphibole; both minerals are extremely iron-rich and contain virtually no magnesium. Major-.and trace-element analyses of the microgranite and of the two dark minerals by wet chemical methods are compared with results from an inductively-coupled plasma spectrometer.
ANALYTICAL METHODSThe chemical analyses of the Ailsa Craig alkali amphibole and aenigmatite were made by 'conventional' wet chemical met…
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