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SAMPLE INFO : 94SJP17
Sample ID:94SJP17
Station ID:94SJP17
Latitude:62.29266982
Longitude:-143.2590716
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Andesite
Text Description:
Vertical sheeted dike, trending E-W cutting through the brecciated unit (sBA9) at Site 12. Fine grained, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque and plagioclase. Plagioclase phenocrysts (An30 - An57) are up to 1.7 mm and some have sieve textured zones; the larger sieve textured grains can be oscillatory zoned; the smaller grains tend to have normal zoning. Orthopyroxene phenocrysts are up to 2.5 mm and some have clinopyroxene rims (up to 0.2 mm thick) or opaque inclusions. Olivine phenocrysts are up to 1.6 mm, but most are altered to serpentine. Clinopyroxene phenocrysts are up to 0.15 mm. 44.9% matrix, 39.5% plagioclase, 0.5% olivine, 0.3% altered olivine?, 2.4% clinopyroxene, 7.4% orthopyroxene, 5.0% vesicles.

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
94SJP1762.29266982-143.2590716Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R12E, S19Vertical sheeted dike, trending E-W cutting through the brecciated unit (sBA9) at Site 12. Fine grained, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque and plagioclase. Plagioclase phenocrysts (An30 - An57) are up to 1.7 mm and some have sieve textured zones; the larger sieve textured grains can be oscillatory zoned; the smaller grains tend to have normal zoning. Orthopyroxene phenocrysts are up to 2.5 mm and some have clinopyroxene rims (up to 0.2 mm thick) or opaque inclusions. Olivine phenocrysts are up to 1.6 mm, but most are altered to serpentine. Clinopyroxene phenocrysts are up to 0.15 mm. 44.9% matrix, 39.5% plagioclase, 0.5% olivine, 0.3% altered olivine?, 2.4% clinopyroxene, 7.4% orthopyroxene, 5.0% vesicles. 94SJP17LavaWhole-rock 58.4 0.68 17.1 5.64 0.1 5.79 7.35 3.6 1.08 0.11 99.1855DCP6.185.64LOI=0.19DCP 19.5 481 568 15 97 3.5 2.7 1.4 19.1 141 216 123 64 63 17.2 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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