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SAMPLE INFO : 94SJP95
Sample ID:94SJP95
Station ID:94SJP95
Latitude:62.35294651
Longitude:-143.4118559
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
 Text Description:
Flow overlying 94SJP94 on the west side of Goat Creek. Outcrop weathers into large plates and consists of a lower rubble zone that grades up into a 10-15’ thick massive zone with an overlying vesicular zone. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque, plagioclase, clinopyroxene and olivine. An inclusion of plagioclase, mesostasis and pyroxene is present. Xenolithic quartz grains up to 0.6 mm are surrounded by a corona of small clinopyroxene crystals. Plagioclase phenocrysts (An36 - An61) are up to 2.5 mm and large grains have sieve textured zones with resorbed edges. Olivine phenocrysts are up to 0.6 mm and occasionally have thin dark rims and resorption embayments. Clinopyroxene phenocrysts are up to 0.25 mm. There may be some orthopyroxene? 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
94SJP9562.35294651-143.4118559Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R11E, S29Flow overlying 94SJP94 on the west side of Goat Creek. Outcrop weathers into large plates and consists of a lower rubble zone that grades up into a 10-15’ thick massive zone with an overlying vesicular zone. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque, plagioclase, clinopyroxene and olivine. An inclusion of plagioclase, mesostasis and pyroxene is present. Xenolithic quartz grains up to 0.6 mm are surrounded by a corona of small clinopyroxene crystals. Plagioclase phenocrysts (An36 - An61) are up to 2.5 mm and large grains have sieve textured zones with resorbed edges. Olivine phenocrysts are up to 0.6 mm and occasionally have thin dark rims and resorption embayments. Clinopyroxene phenocrysts are up to 0.25 mm. There may be some orthopyroxene? present.94SJP95LavaWhole-rock 57.62 0.77 17.86 6.43 0.12 4.91 7.24 3.8 1.2 0.14 10055DCP7.096.43LOI=-0.12DCP 19.2 387 741 15 97 2.1 4.2 1.8 16.6 168 88 75 61 70 18.8 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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