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SAMPLE INFO : 74-AMm-89
Sample ID:74-AMm-89
Station ID:74-AMm-89
Latitude:62.0061
Longitude:-144.615
Datum:NAD83
Date Sampled:1974-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Dacite
Sample Unit:Qwlf
Text Description:
Thin to thick flows of dacite and andesite (?). Visited only massive two-pyroxene dacite flow of probable Mount Wrangell affinity, exposed in tributary of Dadina River (loc. 29, sec. 26, T. 3 N., R. 4 E.) Rock is medium gray and locally vesicular and contains phenocrysts (2-5 mm) of abundant plagioclase and hypersthene and rare to common augite and olivine in an intersertal to intergranular groundmass.

References:
Geologic map of the Gulkana A-2 quadrangle, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-majorsREF majorsMETH majorsFe2O3/Fe203T origFeO/FeOT origVolatiles csvMETH volatilesCsRbBaSrLaCePrNdSmEuGdTbDyHoErTmYbLuYZrNbHfTaPbThUScVCrFeCoNiCuZnGaMoAsNaKRef trace1METH trace1RbBaSrLaCeNdSmEuGdDyErYbLuYZrNbPbThUScTiVCrNiCuZnGaRef trace2METH trace2Light csvHalogen csvother major csvother lile csvother ree csvother hfse csvother hpe csvother tm csvother misc csv
74-AMm-8962.0061-144.615Miller, T. P.1974-00-00 WrangellWrangell Volcanic Field, Gulkana A-2 quadrangle. Lat and long derived from paper map.Thin to thick flows of dacite and andesite (?). Visited only massive two-pyroxene dacite flow of probable Mount Wrangell affinity, exposed in tributary of Dadina River (loc. 29, sec. 26, T. 3 N., R. 4 E.) Rock is medium gray and locally vesicular and contains phenocrysts (2-5 mm) of abundant plagioclase and hypersthene and rare to common augite and olivine in an intersertal to intergranular groundmass.74-AMm-89Whole Rock 61.8 0.98 16.1 5.3 0.08 3.4 5.5 3.5 2.3 0.2 992665RAPIDA1.14.2H2OP=1.1; H2OM=0.06; CO2=0.02RAPIDA

SAMPLE LOCATION

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