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Sample ID:93SJP30
Station ID:93SJP30
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Dacite
Text Description:
A 3-5 thick, vertical dike trending N32E, with a chill margin against silicic material of Dome A at Site 2. Fine-grained, vesicular, holocrystalline, pilotaxitic, porphyritic to glomeroporphyritic with a matrix of cryptocrystalline material, opaque, feldspar and alteration lining vesicles. Plagioclase phenocrysts (An37 - An61) are 2.2 -0.1 mm, and some have sieve textured cores or intermediate zones, complex zoning with prussian blue extinction, resorption embayments and rounded rims. Orthopyroxene phenocrysts are 1.2-0.1 mm and some have clinopyroxene rims or opaque inclusions. Clinopyroxene phenocrysts are 1.5-0.1 mm. Amphibole phenocrysts are 2.4-0.1 mm and display green-brown pleochroism; some grains have black coronas. Opaque phenocrysts are up to 0.3 mm.

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
93SJP3062.43018185-143.1013028Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T8N, R12E, S3693SJP30LavaWhole-rock 64.77 0.75 16.7 4 0.09 1.22 3.83 4.98 2.21 0.27 100.2455DCP4.444LOI=1.18DCP 39 703 401 25 223 7.4 4.3 3.4 9.3 59 3 2 8 69 17.6 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;


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