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SAMPLE INFO : 94SJP77
Sample ID:94SJP77
Station ID:94SJP77
Latitude:62.27488818
Longitude:-143.3162942
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
 Text Description:
At least 30’ thick, wall-like, blocky outcrop at South Pass. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and alteration. Plagioclase phenocrysts are up to 1.75 mm and occasionally have strong normal zoning, resorption embayments and/or alteration. Orthopyroxene phenocrysts are up to 1.2 mm and some have opaque inclusions. Clinopyroxene phenocrysts are up to 0.65 mm. Opaque phenocrysts are up to 0.5 mm. Trachydacite.

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
94SJP7762.27488818-143.3162942Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S26At least 30’ thick, wall-like, blocky outcrop at South Pass. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and alteration. Plagioclase phenocrysts are up to 1.75 mm and occasionally have strong normal zoning, resorption embayments and/or alteration. Orthopyroxene phenocrysts are up to 1.2 mm and some have opaque inclusions. Clinopyroxene phenocrysts are up to 0.65 mm. Opaque phenocrysts are up to 0.5 mm. Trachydacite.94SJP77LavaWhole-rock 64.48 0.92 16.48 4.75 0.1 1.46 3.52 5.27 2.37 0.31 99.7655DCP5.244.75LOI=0.35DCP 36 785 375 39 377 13.6 3.2 2.2 11.1 43bdl 2 6 83 19.9 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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