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SAMPLE INFO : 94SJP27D
Sample ID:94SJP27D
Station ID:94SJP27D
Latitude:62.20683064
Longitude:-143.1262907
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Pyroclastic Flow
Field Lithology:Andesite
Text Description:
A juvenile block from the lahar/pyroclastic flow immediately overlying silicic material from Dome A and underlying flows and agglutinate of unit nA1 at Site 5. Fine-grained, hypocrystalline, intersertal, locally intergranular, seriate porphyritic with a matrix of brown glass, opaque and feldspar microlites. Plagioclase phenocrysts (An28 - An58) are up to 1.75 mm and some have sieve textured cores and/or intermediate zones, complex zoning, and rarely have resorption embayments and/or tooth-like overgrowth rims. Orthopyroxene phenocrysts are up to 1.0 mm and have clinopyroxene rims with occasional sieve textured zones; some anhedral orthopyroxene is intergrown with plagioclase. Clinopyroxene phenocrysts are up to 0.2 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
94SJP27D62.20683064-143.1262907Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S26A juvenile block from the lahar/pyroclastic flow immediately overlying silicic material from Dome A and underlying flows and agglutinate of unit nA1 at Site 5. Fine-grained, hypocrystalline, intersertal, locally intergranular, seriate porphyritic with a matrix of brown glass, opaque and feldspar microlites. Plagioclase phenocrysts (An28 - An58) are up to 1.75 mm and some have sieve textured cores and/or intermediate zones, complex zoning, and rarely have resorption embayments and/or tooth-like overgrowth rims. Orthopyroxene phenocrysts are up to 1.0 mm and have clinopyroxene rims with occasional sieve textured zones; some anhedral orthopyroxene is intergrown with plagioclase. Clinopyroxene phenocrysts are up to 0.2 mm 94SJP27DPyroclastic FlowBombWhole-rock 57.46 0.95 17.6 6 0.12 4.08 7.13 3.81 1.36 0.37 99.2955DCP6.76LOI=0.96DCP 23 494 516 23 156 4.5 1 1.6 20 168 36 50 46 73 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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