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SAMPLE INFO : 94SJP73
Sample ID:94SJP73
Station ID:94SJP73
Latitude:62.2684979
Longitude:-143.3360165
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
 Text Description:
Approximately 50’ thick flow with a glassy top surface at the very top of South Pass. Fine grained, vesicular, hypocrystalline, intersertal, seriate porphyritic with a matrix of brown glass, opaque, plagioclase, orthopyroxene and clinopyroxene. Plagioclase phenocrysts (An48 - An63) are up to 4.32 mm and some have normal zoning, occasionally there is oscillatory zoning; melt inclusions are common in larger grains. Olivine phenocrysts are up to 0.5 mm and some have coronas of small orthopyroxene crystals. Orthopyroxene phenocrysts are up to 0.7 mm. May be some clinopyroxene? present.

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
94SJP7362.2684979-143.3360165Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S26Approximately 50’ thick flow with a glassy top surface at the very top of South Pass. Fine grained, vesicular, hypocrystalline, intersertal, seriate porphyritic with a matrix of brown glass, opaque, plagioclase, orthopyroxene and clinopyroxene. Plagioclase phenocrysts (An48 - An63) are up to 4.32 mm and some have normal zoning, occasionally there is oscillatory zoning; melt inclusions are common in larger grains. Olivine phenocrysts are up to 0.5 mm and some have coronas of small orthopyroxene crystals. Orthopyroxene phenocrysts are up to 0.7 mm. May be some clinopyroxene? present.94SJP73LavaWhole-rock 58.54 1.47 16.77 6.68 0.11 3.16 6.33 4.16 1.89 0.39 99.7655DCP7.356.68LOI=0.48DCP 39 602 506 30 236 9.6 4.1 2 19.1 214 31 39 115 71 18.6 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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