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SAMPLE INFO : 94SJP24
Sample ID:94SJP24
Station ID:94SJP24
Latitude:62.44046039
Longitude:-143.1176922
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Rhyolite
 Text Description:
Silicic flow from Dome A at Site 5. Sample is from the upper vitrophyre. Fine-grained vitrophyre, hypocrystalline, intersertal, locally pilotaxitic, seriate porphyritic with a matrix of colorless glass, feldspar, biotite, amphibole? and opaque. Plagioclase phenocrysts are up to 1.75 mm. There is also untwinned or sanidine twinned feldspar and a few have resorbed cores with overgrowth rims. Biotite phenocrysts are up to 0.6 mm. Opaque phenocrysts are up to 0.25 mm. Zircon phenocrysts are ~0.075 mm. 96.1% matrix, 3.7% plagioclase, 0.2% biotite.

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
94SJP2462.44046039-143.1176922Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S25Silicic flow from Dome A at Site 5. Sample is from the upper vitrophyre. Fine-grained vitrophyre, hypocrystalline, intersertal, locally pilotaxitic, seriate porphyritic with a matrix of colorless glass, feldspar, biotite, amphibole? and opaque. Plagioclase phenocrysts are up to 1.75 mm. There is also untwinned or sanidine twinned feldspar and a few have resorbed cores with overgrowth rims. Biotite phenocrysts are up to 0.6 mm. Opaque phenocrysts are up to 0.25 mm. Zircon phenocrysts are ~0.075 mm. 96.1% matrix, 3.7% plagioclase, 0.2% biotite.94SJP24LavaWhole-rock 74.32 0.06 13.7 0.76 0.08 0.23 0.85 4.22 3.22 0.11 100.2155DCP0.840.76LOI=2.45DCP 55 972 162 13 66 8.7 4.1 3.2 3.9bdl bdl bdl 4 39 14.3 55XRF: Rb, Zr, Nb, Th, U, Ga; DCP: Ba, Sc; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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