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SAMPLE INFO : 87-ARh-7
Sample ID:87-ARh-7
Station ID:87-ARh-7
Latitude:62.1197
Longitude:-144.4529
Datum:NAD83
Date Sampled:1987-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Text Description:
Mount Drum basaltic andesite flows (Pleistocene). Predominantly light-brownish-gray, thick (5-20 m), coarsely porphyritic hypersthene-olivine basaltic andesite flows that contain phenocrysts of plagioclase (5-25%, as large as 1 cm), hypersthene (1-6%, 1-3 mm), and olivine (1-10%, 0.5-3 mm; rounded and locally rimmed by hypersthene), in intergranular to intersertal groundmass. * * * Flows are probably from Mount Drum, but unit may include older lavas from other sources. Maximum thickness about 300 m.

References:
Geologic map of the Gulkana A-1 Quadrangle, south-central Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
87-ARh-762.1197-144.4529Richter, D. H.1987-00-00 DrumMount Drum rocks within Gulkana A-1 quadrangle. Latitude and longitude derived from paper map.Mount Drum basaltic andesite flows (Pleistocene). Predominantly light-brownish-gray, thick (5-20 m), coarsely porphyritic hypersthene-olivine basaltic andesite flows that contain phenocrysts of plagioclase (5-25%, as large as 1 cm), hypersthene (1-6%, 1-3 mm), and olivine (1-10%, 0.5-3 mm; rounded and locally rimmed by hypersthene), in intergranular to intersertal groundmass. * * * Flows are probably from Mount Drum, but unit may include older lavas from other sources. Maximum thickness about 300 m.87-ARh-7LavaWhole-rock 54.3 1.02 17.4 6.9 0.12 6.49 8.62 3.49 0.94 0.24 100.082262NN2.134.98H2OP=0.38; H2OM=0.09; CO2=0.01RAPIDA

SAMPLE LOCATION

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