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SAMPLE INFO : 94SJP26
Sample ID:94SJP26
Station ID:94SJP26
Latitude:62.44
Longitude:-143.1263032
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Andesite
Text Description:
A 4-5' thick, platy dike trending N25E that intrudes silicic rubble from Dome A near Site 5. Further up in the section, the dike flattens out to become a sill that intrudes into a lahar/pyroclastic flow package at Site 5. There is no bake zone with the lahar/pyroclastic flow. The sill then twists up vertically cutting through blocky autobrecciated? flows. Fine-grained, holocrystalline, intergranular, seriate porphyritic with matrix of mesostasis, red alteration patches, opaque, plagioclase and clinopyroxene. Plagioclase phenocrysts (An17-An49) are up to 1.8 mm and most large grains have sieve textured intermediate zones, complex zoning, and a few include orthopyroxene and matrix along rim. Orthopyroxene phenocrysts are up to 1.0 mm and display thick clinopyroxene rims, opaque and melt inclusions, and several have resorbed edges.

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
94SJP2662.44-143.1263032Preece, S. J.1994-00-00 Skookum CreekNabesna B-5, T8N, R12E, S26A 4-5' thick, platy dike trending N25E that intrudes silicic rubble from Dome A near Site 5. Further up in the section, the dike flattens out to become a sill that intrudes into a lahar/pyroclastic flow package at Site 5. There is no bake zone with the lahar/pyroclastic flow. The sill then twists up vertically cutting through blocky autobrecciated? flows. Fine-grained, holocrystalline, intergranular, seriate porphyritic with matrix of mesostasis, red alteration patches, opaque, plagioclase and clinopyroxene. Plagioclase phenocrysts (An17-An49) are up to 1.8 mm and most large grains have sieve textured intermediate zones, complex zoning, and a few include orthopyroxene and matrix along rim. Orthopyroxene phenocrysts are up to 1.0 mm and display thick clinopyroxene rims, opaque and melt inclusions, and several have resorbed edges.94SJP26LavaWhole-rock 57.36 0.86 17.97 5.57 0.12 4.36 7.26 3.9 1.5 0.37 98.855DCP6.085.57LOI=0.73DCP 27 575 548 19 130 4.1 4.5 2.4 18.4 153 72 75 49 61 17.6 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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