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SAMPLE INFO : 95SJP4C
Sample ID:95SJP4C
Station ID:95SJP4C
Latitude:62.40240202
Longitude:-143.0499124
Datum:NAD83
Date Sampled:1995-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Rhyolite
Text Description:
A silicic block from a baked portion of the carapace of dome C unit at Site 7. Fine grained, holocrystalline, porphyritic with a matrix of plagioclase, opaque and alteration (reddish color from oxidation). Plagioclase phenocrysts (An37 - An48) are up to 1.1 mm and strongly zoned. Opaque phenocrysts are up to 0.25 mm for primary phenocrysts; much of the opaque is secondary oxidation of orthopyroxene needles. Orthopyroxene phenocrysts are up to 0.7 mm and most is oxidized to opaque.

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
95SJP4C62.40240202-143.0499124Preece, S. J.1995-00-00 Skookum CreekNabesna B-5; T7N, R13E, S8A silicic block from a baked portion of the carapace of dome C unit at Site 7. Fine grained, holocrystalline, porphyritic with a matrix of plagioclase, opaque and alteration (reddish color from oxidation). Plagioclase phenocrysts (An37 - An48) are up to 1.1 mm and strongly zoned. Opaque phenocrysts are up to 0.25 mm for primary phenocrysts; much of the opaque is secondary oxidation of orthopyroxene needles. Orthopyroxene phenocrysts are up to 0.7 mm and most is oxidized to opaque.95SJP4CLavaWhole-rock 70.64 0.27 16 2.56 0.11 0.34 2.15 5.31 2.28 0.07 100.3255DCP2.852.56LOI=0.28DCP 32 836 334 17 276 7.1 5 2.4 1.7 3bdl 1 3 61 16.4 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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