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SAMPLE INFO : 94SJP76
Sample ID:94SJP76
Station ID:94SJP76
Latitude:62.2740547
Longitude:-143.3176831
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Text Description:
Approximately 30-50’ thick flow displaying classic platy viscous flow structure where it has ramped over itself. Phenocrysts: Fine grained, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and alteration. Plagioclase phenocrysts (An49) are up to 2.3 mm and rarely display oscillatory zoning. Opaque phenocrysts are up to 0.2 mm. Orthopyroxene phenocrysts are up to 0.4 mm. An altered phase is present. 91.6% matrix, 7.4% plagioclase, 0.1% opaque, 0.5% altered phase, 0.4% alteration. Trachyandesite.

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
94SJP7662.2740547-143.3176831Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S26Approximately 30-50’ thick flow displaying classic platy viscous flow structure where it has ramped over itself. Phenocrysts: Fine grained, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and alteration. Plagioclase phenocrysts (An49) are up to 2.3 mm and rarely display oscillatory zoning. Opaque phenocrysts are up to 0.2 mm. Orthopyroxene phenocrysts are up to 0.4 mm. An altered phase is present. 91.6% matrix, 7.4% plagioclase, 0.1% opaque, 0.5% altered phase, 0.4% alteration. Trachyandesite.94SJP76LavaWhole-rock 60.58 1.2 17 6.49 0.16 1.96 4.54 5.31 2.04 0.5 10055DCP7.166.49LOI=0.16DCP 29 609 430 29 68.1 36.8 7.8 2.3 7.7 7.6 4.3 4 0.6 44 333 14.9 4.6 2.1 14.2 56 1 3 10 87 20.4 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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