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SAMPLE INFO : 95SJP4B
Sample ID:95SJP4B
Station ID:95SJP4B
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 dome C carapace unit at Site 7. Fine grained, holocrystalline, porphyritic with a matrix of plagioclase, opaque, apatite?, orthopyroxene and alteration. Plagioclase phenocrysts are up to 1.8 mm and often are strongly zoned (both normal and oscillatory). Orthopyroxene phenocrysts are up to 0.75 mm; many grains have a brown coating (oxidation?) and are intensely pleochroic. Opaque phenocrysts are up to 0.3 mm.

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
95SJP4B62.40240202-143.0499124Preece, S. J.1995-00-00 Skookum CreekNabesna B-5; T7N, R13E, S8A silicic block from a baked portion of the dome C carapace unit at Site 7. Fine grained, holocrystalline, porphyritic with a matrix of plagioclase, opaque, apatite?, orthopyroxene and alteration. Plagioclase phenocrysts are up to 1.8 mm and often are strongly zoned (both normal and oscillatory). Orthopyroxene phenocrysts are up to 0.75 mm; many grains have a brown coating (oxidation?) and are intensely pleochroic. Opaque phenocrysts are up to 0.3 mm.95SJP4BLavaWhole-rock 69.03 0.29 15.97 2.53 0.1 0.56 2.19 4.82 2.64 0.03 100.2755DCP2.812.53LOI=1.83DCP 43 761 333 18 289 8 6 2.8 1.9 9bdl 1 3 62 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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