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SAMPLE INFO : Snyder_1959_2
Sample ID:Snyder_1959_2
Station ID:Snyder_1959_2
Latitude:51.9531
Longitude:178.5356
Datum:NAD83
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Andesite from typical inclusion in lavas of Double Point dacite. Color: dark gray (N 3). Texture: miarolitic intersertal. Pore space, miarolitic cavities: 20-30 percent. Plagioclase lathes, 45-55 percent, average An60 but range from An26 to An74; megaphenocrysts, 3 percent, show fritted texture. Oxyhornblende, 14 percent, is pleochroic in deep brown and olive brown, occurs in needles with a length-width ratio of 15:1; many hornblende crystals have hollow centers. Orthopyroxene, 6 percent, occurs in euhedral needles with a length-width ratio as much as 30:1. Clinopyroxene, 4 percent, is present as stubby subhedral crystals. Magnetite, 4 percent, anhedrons have a length-width ratio as much as 10:1. Clear brown glass, 14 percent, in groundmass bas N=1.498.

References:
Geology of Little Sitkin Island, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2geologic 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
Snyder_1959_2 51.9531 178.5356 Snyder, G. L. Little Sitkin Collected from small inlier of Double Point dacite about 1 mile west-northwestward of summit of Little Sitkin volcano Andesite from typical inclusion in lavas of Double Point dacite. Color: dark gray (N 3). Texture: miarolitic intersertal. Pore space, miarolitic cavities: 20-30 percent. Plagioclase lathes, 45-55 percent, average An60 but range from An26 to An74; megaphenocrysts, 3 percent, show fritted texture. Oxyhornblende, 14 percent, is pleochroic in deep brown and olive brown, occurs in needles with a length-width ratio of 15:1; many hornblende crystals have hollow centers. Orthopyroxene, 6 percent, occurs in euhedral needles with a length-width ratio as much as 30:1. Clinopyroxene, 4 percent, is present as stubby subhedral crystals. Magnetite, 4 percent, anhedrons have a length-width ratio as much as 10:1. Clear brown glass, 14 percent, in groundmass bas N=1.498. Snyder_1959_2 Lava Whole Rock 55.31 0.85 18.01 8.27 0.15 3.94 8.63 3.13 1.1 0.15 99.92424NN4.454.23H2OM=0.05; H2OP=0.41; CO2=0NN 17.4 457 7.7 745XRFK V=0.9, M=NN, R=745;

SAMPLE LOCATION

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