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SAMPLE INFO : 93SJP67
Sample ID:93SJP67
Station ID:93SJP67
Latitude:62.41684767
Longitude:-143.1607451
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Rhyolite
 Text Description:
Blocks of vitrophyre in scree from Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, feldspar, quartz?, opaque and alteration. Plagioclase phenocrysts (An34 - An38) are up to 4.0 mm and most are rounded; there is often strong oscillatory zoning. Opaque phenocrysts are up to 0.4 mm. There is an altered phase that is now an opaque rim with a core of unidentifiable high relief crystals ± plagioclase. A second altered phase, larger in size, consists of serpentine/chlorite and calcite.

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
93SJP6762.41684767-143.1607451Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T7N, R12E, S3Blocks of vitrophyre in scree from Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, feldspar, quartz?, opaque and alteration. Plagioclase phenocrysts (An34 - An38) are up to 4.0 mm and most are rounded; there is often strong oscillatory zoning. Opaque phenocrysts are up to 0.4 mm. There is an altered phase that is now an opaque rim with a core of unidentifiable high relief crystals ± plagioclase. A second altered phase, larger in size, consists of serpentine/chlorite and calcite.93SJP67LavaWhole-rock 70.27 0.34 15.52 2.4 0.05 0.83 2.56 4.89 2.2 0.17 99.8655DCP2.662.4LOI=0.77DCP 38 761 310 14 191 6.9 3.9 1.7 3.5 20bdl 1 5 49 16.4 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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