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SAMPLE INFO : 95SJP8
Sample ID:95SJP8
Station ID:95SJP8
Latitude:62.38323403
Longitude:-143.0265778
Datum:NAD83
Date Sampled:1995-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Dacite
 Text Description:
Platy flow, 100 - 150’ thick, sample was taken 50 - 75’ below rubble zone with overlying flow (95SJP7). Outcrop forms cliff-like exposure at Site 8. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, feldspar, opaque and alteration. Plagioclase phenocrysts (An45 - An59) are up to 1.88 mm and frequently have oscillatory zoning; normal zoning is less commonly. Orthopyroxene phenocrysts are up to 0.5 mm and often have opaque inclusions. Opaque phenocrysts are up to 0.4 mm. 81.6% matrix, 16.7% plagioclase, 1.0% orthopyroxene, 0.7% opaque.

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
95SJP862.38323403-143.0265778Preece, S. J.1995-00-00 Skookum CreekNabesna B-5; T7N, R13E, S13Platy flow, 100 - 150’ thick, sample was taken 50 - 75’ below rubble zone with overlying flow (95SJP7). Outcrop forms cliff-like exposure at Site 8. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, feldspar, opaque and alteration. Plagioclase phenocrysts (An45 - An59) are up to 1.88 mm and frequently have oscillatory zoning; normal zoning is less commonly. Orthopyroxene phenocrysts are up to 0.5 mm and often have opaque inclusions. Opaque phenocrysts are up to 0.4 mm. 81.6% matrix, 16.7% plagioclase, 1.0% orthopyroxene, 0.7% opaque.95SJP8LavaWhole-rock 66.59 0.67 16.27 4.08 0.1 1.22 3.68 5.03 1.9 0.31 100.7955DCP4.544.08LOI=0.15DCP 35 687 420 23 197 6.4 3.8 2.1 6 42bdl 1 4 62 17.1 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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