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SAMPLE INFO : 94SJP114
Sample ID:94SJP114
Station ID:94SJP114
Latitude:62.26099246
Longitude:-143.4282415
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Field Lithology:Dacite
Text Description:
Blocky and platy outcrop of silicic material that appears to have a vertical contact with andesite to the west on the west side of Sheep Lake. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, plagioclase and opaque. Plagioclase phenocrysts are up to 1.0 mm and most grains are small laths; larger grains occasionally display oscillatory zoning and/or sieve textured zones. There is a dehydrated phase, amphibole?, that now consists of fine masses of opaque. Orthopyroxene phenocrysts up to 0.75 mm. Opaque phenocrysts up to 0.45 mm. 91.2% matrix, 8.5% plagioclase, 0.2% opaque, 0.1% altered phase.

References:
Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex

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
94SJP11462.26099246-143.4282415Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S32Blocky and platy outcrop of silicic material that appears to have a vertical contact with andesite to the west on the west side of Sheep Lake. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, plagioclase and opaque. Plagioclase phenocrysts are up to 1.0 mm and most grains are small laths; larger grains occasionally display oscillatory zoning and/or sieve textured zones. There is a dehydrated phase, amphibole?, that now consists of fine masses of opaque. Orthopyroxene phenocrysts up to 0.75 mm. Opaque phenocrysts up to 0.45 mm. 91.2% matrix, 8.5% plagioclase, 0.2% opaque, 0.1% altered phase.94SJP114LavaWhole-rock 69.06 0.34 16.99 2.58 0.11 0.74 2.74 5.39 1.98 0.09 99.855DCP2.862.58LOI=-0.02DCP 36 748 402 24.1 49.4 19.7 3.1 1.1 2.9 2.6 1.6 1.7 0.3 17 281 8.9 5.1 1.9 3 9bdl bdl 3 57 16.1 55XRF: Rb, Zr, Nb, Th, U, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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