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SAMPLE INFO : 94SJP51A
Sample ID:94SJP51A
Station ID:94SJP51A
Latitude:62.42379261
Longitude:-143.1526903
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Dacite
Text Description:
Dome B at Site 5 that is surrounded by younger nA1 flows (94SJP51B). Fine grained, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque and plagioclase. Plagioclase phenocrysts (An36 - An52) are up to 1.75 mm and often have strong oscillatory zoning or normal zoning, and some have resorbed edges and occasional sieve textured zones. Amphibole phenocrysts are up to 1.05 mm with red-brown pleochroism and thick opaque and feldspar? rims; some grains are completely dehydrated. Opaque phenocrysts are mostly dehydrated amphibole, but primary opaque crystals are present up to 0.1 mm. 67.4% matrix, 24.3% plagioclase, 1.1% opaque, 4.7% altered amphibole, 0.1% alteration, 2.4% vesicles.

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
94SJP51A62.42379261-143.1526903Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S34Dome B at Site 5 that is surrounded by younger nA1 flows (94SJP51B). Fine grained, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque and plagioclase. Plagioclase phenocrysts (An36 - An52) are up to 1.75 mm and often have strong oscillatory zoning or normal zoning, and some have resorbed edges and occasional sieve textured zones. Amphibole phenocrysts are up to 1.05 mm with red-brown pleochroism and thick opaque and feldspar? rims; some grains are completely dehydrated. Opaque phenocrysts are mostly dehydrated amphibole, but primary opaque crystals are present up to 0.1 mm. 67.4% matrix, 24.3% plagioclase, 1.1% opaque, 4.7% altered amphibole, 0.1% alteration, 2.4% vesicles.94SJP51ALavaWhole-rock 66.04 0.64 17 3.77 0.09 0.73 3.81 4.89 2.21 0.27 99.3855DCP4.153.77LOI=0.55DCP 43 816 428 20 210 7.1 6.3 2.5 6.1 43bdl 3 9 57 17.1 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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