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Sample ID:94SJP39
Station ID:94SJP39
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Dacite
Text Description:
Approximately 15-20 thick dike that outcrops as rubbly plates and cuts up vertically through silicic material from Dome A as well as flows of unit nA1 at Site 3. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and minor alteration. Plagioclase phenocrysts (An28 - An47, An67) are up to 3.25 mm and are frequently rounded; some have oscillatory zoning; some have patchy, resorbed cores with complex overgrowth rims or resorption embayments. Amphibole phenocrysts are up to 0.5 mm with green-yellow pleochroism. Orthopyroxene phenocrysts are up to 0.5 mm with reddish oxidation? along rims. Opaque phenocrysts up to 0.35 mm. One clinopyroxene phenocrysts, 0.8 mm, was observed.

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
94SJP3962.427404-143.1238023Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S3594SJP39LavaWhole-rock 67.39 0.54 16.4 3.45 0.11 0.73 3.32 4.94 2.11 0.24 100.2955DCP3.833.45LOI=0.74DCP 39 727 390 21 229 7.5 5.6 1.4 8.3 83 2 5 13 63 17.5 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;


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