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SAMPLE INFO : 94SJP31
Sample ID:94SJP31
Station ID:94SJP31
Latitude:62.42990417
Longitude:-143.1251914
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Basaltic Andesite
Text Description:
A 2-3' thick, subvertical dike trending N30E and cutting through silicic flows on the west side of Dome A at Site 2. In outcrop it is wall-like and can be followed into the lower part of the andesite package overlying the silicic flows. Fine-grained, seriate, hypocrystalline with a matrix of mesostasis, opaque, feldspar and clinopyroxene. Plagioclase phenocrysts (An22-An44) are 1.75-0.05 mm, some have complex zoning, some have one or more sieve textured zones and/or large melt inclusions. Orthopyroxene phenocrysts are 1.0-0.1 mm and some have clinopyroxene rims. Clinopyroxene phenocrysts are 2.75-0.05 mm and twinning is common. Olivine? phenocrysts are 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
94SJP3162.42990417-143.1251914Preece, S. J.1994-00-00 Skookum CreekNabesna B-5, T8N, R12E, S35A 2-3' thick, subvertical dike trending N30E and cutting through silicic flows on the west side of Dome A at Site 2. In outcrop it is wall-like and can be followed into the lower part of the andesite package overlying the silicic flows. Fine-grained, seriate, hypocrystalline with a matrix of mesostasis, opaque, feldspar and clinopyroxene. Plagioclase phenocrysts (An22-An44) are 1.75-0.05 mm, some have complex zoning, some have one or more sieve textured zones and/or large melt inclusions. Orthopyroxene phenocrysts are 1.0-0.1 mm and some have clinopyroxene rims. Clinopyroxene phenocrysts are 2.75-0.05 mm and twinning is common. Olivine? phenocrysts are present.94SJP31LavaWhole-rock 55.47 0.91 17.6 6.49 0.13 5.36 8.57 3.45 1.14 0.16 98.9255DCP7.086.49LOI=0.7DCP 21.7 421 707 18 111 2.7 5 1.5 23.7 185 85 54 108 65 18.1 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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