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SAMPLE INFO : 94SJP53
Sample ID:94SJP53
Station ID:94SJP53
Latitude:62.43101536
Longitude:-143.126858
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Dacite
Text Description:
A 7’ thick vertical dike trending N10°W with good columnar jointing and a 8” thick bake zone where it is in contact with silicic material from Dome A at Site 3. Fine grained, vesicular, hypocrystalline, porphyritic to glomeroporphyritic with a matrix of brown glass, mesostasis, opaque, plagioclase and minor altered patches. Plagioclase phenocrysts (An55) are up to 2.75 mm and commonly have oscillatory zoning, some grains have resorption embayments and are frequently riddled with melt inclusions, and pyroxene or opaque inclusions. Orthopyroxene phenocrysts are up to 2.75 mm, intensely pleochroic, and often contain opaque inclusions and occasionally have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.1 mm and occasionally have orthopyroxene cores. Opaque phenocrysts are up to 0.4 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
94SJP5362.43101536-143.126858Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S35A 7’ thick vertical dike trending N10°W with good columnar jointing and a 8” thick bake zone where it is in contact with silicic material from Dome A at Site 3. Fine grained, vesicular, hypocrystalline, porphyritic to glomeroporphyritic with a matrix of brown glass, mesostasis, opaque, plagioclase and minor altered patches. Plagioclase phenocrysts (An55) are up to 2.75 mm and commonly have oscillatory zoning, some grains have resorption embayments and are frequently riddled with melt inclusions, and pyroxene or opaque inclusions. Orthopyroxene phenocrysts are up to 2.75 mm, intensely pleochroic, and often contain opaque inclusions and occasionally have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.1 mm and occasionally have orthopyroxene cores. Opaque phenocrysts are up to 0.4 mm.94SJP53LavaWhole-rock 63.09 0.95 16.75 4.82 0.13 1.94 4.32 4.39 2.04 0.23 100.955DCP5.384.82LOI=1.33DCP 31 614 422 23 204 6.4 4.2 3.3 12 96 5 7 16 68 17.8 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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