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SAMPLE INFO : Snyder_1959_4
Sample ID:Snyder_1959_4
Station ID:Snyder_1959_4
Latitude:51.9531
Longitude:178.5356
Datum:NAD83
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Andesite of Williwaw Cove formation. Color: medium light gray (N 6). Texture: holocrystalline, porphyritic with both feldspar and pyroxene phenocrysts as much as 4 mm long. Plagioclase, 45-60 percent, ranges in composition from An45 to An60 and averages An51; complex oscillatory zoning and graphic fritting common within individual plagioclase grains. Subhedral clinopyroxene, 10 percent; euhedral orthopyroxene, 10 percent; and anhedral olivine, 1 percent, characterized by brown stains on some fractures. Anhedral magnetite, 5 percent, particularly abundant. Groundmass consists of mesh of feldspar and pyroxene microlites and magnetite dust. Groundmass plagioclase averages An43.

References:
Geology of Little Sitkin Island, 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
Snyder_1959_451.9531178.5356Snyder, G. L. Little SitkinWilliwaw Cove formation from coast in Williwaw Cove near "Shack"Andesite of Williwaw Cove formation. Color: medium light gray (N 6). Texture: holocrystalline, porphyritic with both feldspar and pyroxene phenocrysts as much as 4 mm long. Plagioclase, 45-60 percent, ranges in composition from An45 to An60 and averages An51; complex oscillatory zoning and graphic fritting common within individual plagioclase grains. Subhedral clinopyroxene, 10 percent; euhedral orthopyroxene, 10 percent; and anhedral olivine, 1 percent, characterized by brown stains on some fractures. Anhedral magnetite, 5 percent, particularly abundant. Groundmass consists of mesh of feldspar and pyroxene microlites and magnetite dust. Groundmass plagioclase averages An43.Snyder_1959_4Whole Rock 55.52 0.87 18.07 8.17 0.16 4.25 8.7 3.04 0.91 0.16 100.02424NN2.915.53H2OM=0.06; H2OP=0.05; CO2=0.01NN 12.3 307 8.7 745XRFB V=0.001, M=SPEC, R=424;Ba V=0.02, M=SPEC, R=424;Sr V=0.06, M=SPEC, R=424;K V=0.76, M=NN, R=745;Yb V=0.0003, M=SPEC, R=424;Y V=0.002, M=SPEC, R=424;Zr V=0.007, M=SPEC, R=424;Ni V=0.0008, M=SPEC, R=424;Co V=0.003, M=SPEC, R=424;Cr V=0.002, M=SPEC, R=424;Cu V=0.008, M=SPEC, R=424;V V=0.02, M=SPEC, R=424;Ga V=0.001, M=SPEC, R=424;Sc V=0.002, M=SPEC, R=424;

SAMPLE LOCATION

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