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SAMPLE INFO : 94SJP100
Sample ID:94SJP100
Station ID:94SJP100
Latitude:62.35239812
Longitude:-143.1982409
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Dacite
 Text Description:
Rubbly outcrop of Dome G at Site 13. Locally reddish color around where the geology map indicates a vent (Lowe et al., 1982). Fine grained, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque, feldspar, orthopyroxene? and sparse zircon?. Plagioclase phenocrysts are up to 2.55 mm and both normal and oscillatory zoning are present; grains occasionally display repeated episodes of resorption and overgrowth. Opaque phenocrysts are up to 0.45 mm. Orthopyroxene phenocrysts are up to 0.98 and contain opaque inclusions. Clinopyroxene phenocrysts are up to 0.55 mm. Amphibole phenocrysts are up to 0.6 mm and most have dehydrated to opaque ± pyroxene, but a few cores are present. 90.0% matrix, 9.4% plagioclase, 0.3% orthopyroxene, 0.2% opaque, 0.1% altered phase.

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
94SJP10062.35239812-143.1982409Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R12E, S28Rubbly outcrop of Dome G at Site 13. Locally reddish color around where the geology map indicates a vent (Lowe et al., 1982). Fine grained, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque, feldspar, orthopyroxene? and sparse zircon?. Plagioclase phenocrysts are up to 2.55 mm and both normal and oscillatory zoning are present; grains occasionally display repeated episodes of resorption and overgrowth. Opaque phenocrysts are up to 0.45 mm. Orthopyroxene phenocrysts are up to 0.98 and contain opaque inclusions. Clinopyroxene phenocrysts are up to 0.55 mm. Amphibole phenocrysts are up to 0.6 mm and most have dehydrated to opaque ± pyroxene, but a few cores are present. 90.0% matrix, 9.4% plagioclase, 0.3% orthopyroxene, 0.2% opaque, 0.1% altered phase.94SJP100LavaWhole-rock 68.24 0.42 16.82 3.01 0.16 1 2.66 5.46 1.95 0.22 99.7955DCP3.323.01LOI=0.05DCP 27 688 444 27.7 59.8 29.2 5.2 1.7 5 4.8 2.7 3 0.5 29 359 11.9 4.7 0.8 3.7 7bdl 2 3 79 17.2 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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