Studies in Volcanic Petrology: I. Talasea, New Guinea, II. Southwest Utah

alkali feldspar alkali olivine basalts amphibole ancestral mountain augite average basaltic andesites basaltic magma basic lavas Benda and Doko biotite calc-alkali calcic CALCULATE caldera caldera complex caldera dacites California Cascades Cenozoic clinopyroxene components composition contain crater dacites Dakataua caldera diopsidic doreites electron microprobe Electron microprobe analyses erupted flow fo₂ fugacity Geol Geology GOSBUF Green and Ringwood groundmass Guinea Hawaiian hypersthene ilmenite intermediate lavas iron enrichment iron-rich iron-titanium oxide Jour K₂O kaersutite KCHK Lake late Cenozoic line of descent liquid Lowder magma Makalia Mineral Na₂O occurs orthopyroxene Osborn oxygen partial melting Petrol Petrology phases phenocrysts pigeonite plagioclase Plate plotted porphyritic PRINT pyroxene quartz residual glass rhyolite ring fracture silica SiO2 Smith and Carmichael sodic southwest Utah SPECS Talasea lavas Talasea Peninsula Talasea series Thingmuli tholeiitic TiO2 titanomagnetite Total trend ulvospinel Utah lavas volcanic rocks volcano Weight percent xenocrysts zoning