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SAMPLE INFO : 81AWs 269
Sample ID:81AWs 269
Station ID:81AWs 269
Latitude:57.7
Longitude:-156.3987581
Datum:NAD83
Date Sampled:1981-01-01
Sample Type 1:Lava
Field Lithology:Dacite
Text Description:
Pale-red (5 R 6/2), vesicular, porphyritic dacite (S; high-silica andesite G) flow. Major minerals are plagioclase (oscillatory zoned An 60 to An 72, average near An 63), orthopyroxene (hypersthene?), and rare clinopyroxene. Plagioclase and pyroxene phenocrysts in a very fine grained glass and plagioclase groundmass. Mafic phenocrysts are smaller than plagioclase phenocrysts.

References:
2004 volcanic activity in Alaska and Kamchatka: summary of events and response of the Alaska Volcano Observatory

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
81AWs 26957.7-156.3987581Wilson, F. H.1981-01-01 Ugashik calderaUgashik C-2, southwest rim of Ugashik calderaPale-red (5 R 6/2), vesicular, porphyritic dacite (S; high-silica andesite G) flow. Major minerals are plagioclase (oscillatory zoned An 60 to An 72, average near An 63), orthopyroxene (hypersthene?), and rare clinopyroxene. Plagioclase and pyroxene phenocrysts in a very fine grained glass and plagioclase groundmass. Mafic phenocrysts are smaller than plagioclase phenocrysts.81AWs 269LavaWhole-rock 60.6 0.56 17.6 5.7 0.15 3.17 7.02 3.45 1.33 0.17 99.754092XRF5.151.07CO2=0.08; H2OP=0.09; H2OM=0.02XRF 700 500 0 30 150 0 < 5 0 20 300 70 5 50 20 20 5 0 0 4092ES: Ba, Sr, Y, Zr, Sc, V, Cr, Fe, Co, Ni; AAS: Pb, Cu, Zn;

SAMPLE LOCATION

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