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Sample ID:94SJP96
Station ID:94SJP96
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Rhyolite
Text Description:
Feeder dike trending N50E to N60E on the west side of Goat Creek. The dike has cross-wise polygonal jointing and is similar in lithology to a flow higher up. Fine grained, hypocrystalline, pilotaxitic, porphyritic with a matrix of pale brown glass, cryptocrystalline material, opaque, feldspar and apatite?. Plagioclase phenocrysts are up to 2.5 mm and often display strong normal zoning and are rounded. Clinopyroxene phenocrysts are up to 0.55 mm. Orthopyroxene phenocrysts are up to 1.0 mm and some have resorption embayments or opaque inclusions. Opaque phenocrysts are up to 0.2 mm. 95.5% matrix, 3.4% plagioclase, 0.6% orthopyroxene, 0.2% clinopyroxene, 0.3% vesicles.

Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex

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
94SJP9662.32822029-143.436301Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S694SJP96LavaWhole-rock 69.22 0.58 14.95 3.63 0.09 0.55 1.78 5.13 3.83 0.14 100.5955DCP4.043.63LOI=0.11DCP 89 981 205 45 534 15.9 11.6 4.2 10 8 3 2 11 73 18.2 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;


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