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Sample ID:94SJP52B
Station ID:94SJP52B
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Rhyolite
Text Description:
A 40-60 thick vitrophyre that contains contorted flow folds at Site 5. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, feldspar and opaque. Plagioclase phenocrysts (An27 - An42) are up to 3.25 mm and most have normal zoning; some have oscillatory zoning. Orthopyroxene phenocrysts are up to 1.1 mm and some have opaque inclusions and/or amphibole rims. Amphibole phenocrysts are up to 1.75 mm with green-yellow pleochroism, and some have opaque inclusions; one grain is rimmed with orthopyroxene. Opaque phenocrysts are up to 0.5 mm. 80.9% matrix, 13.0% plagioclase, 1.0% orthopyroxene, 0.4% opaque, 2.0% amphibole, 2.7% vesicles.

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

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
94SJP52B62.43546008-143.1546Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S3494SJP52BLavaWhole-rock 69.71 0.42 15.3 2.7 0.08 0.87 2.37 4.78 2.64 0.06 100.5255DCP3.012.7LOI=1.1DCP 45 709 285 20 220 8.2 6.6 3.1 6.2 30bdl 2 7 50 16.4 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;


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