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SAMPLE INFO : 94SJP83
Sample ID:94SJP83
Station ID:94SJP83
Latitude:62.38267865
Longitude:-143.0851883
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Dacite
Text Description:
Approximately 60’ wide dike trending WNW-ESE cutting through andesite flows in between Sites 8 and 9. Fine-grained, hypocrystalline, porphyritic with a matrix of colorless glass, opaque and plagioclase. Plagioclase phenocrysts (An30 - An60) are up to 2.5 mm and some have sieve textured zones with large, wormy, glass inclusions and complex zoning. Amphibole phenocrysts are up to 1.25 mm with green-brown pleochroism and black coronas; some have opaque inclusions. Orthopyroxene phenocrysts are up to 1 mm and are strongly pleochroic. Opaque phenocrysts are up to 0.3 mm.

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
94SJP8362.38267865-143.0851883Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R13E, S18Approximately 60’ wide dike trending WNW-ESE cutting through andesite flows in between Sites 8 and 9. Fine-grained, hypocrystalline, porphyritic with a matrix of colorless glass, opaque and plagioclase. Plagioclase phenocrysts (An30 - An60) are up to 2.5 mm and some have sieve textured zones with large, wormy, glass inclusions and complex zoning. Amphibole phenocrysts are up to 1.25 mm with green-brown pleochroism and black coronas; some have opaque inclusions. Orthopyroxene phenocrysts are up to 1 mm and are strongly pleochroic. Opaque phenocrysts are up to 0.3 mm.94SJP83LavaWhole-rock 66.7 0.52 15.97 3.36 0.08 1.27 3.44 4.55 2.02 0.21 100.3155DCP3.733.36LOI=1.82DCP 37 668 421 15 172 6.8 1 1 6.4 48bdl 4 7 52 16.2 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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