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SAMPLE INFO : 94SJP63
Sample ID:94SJP63
Station ID:94SJP63
Latitude:62.28155869
Longitude:-143.1896
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Top flow from a vertical face on the summit of Gutbuster. Several flows can be seen on this face when flying past. Fine to medium grained, holocrystalline, porphyritic with a matrix (here up to 0.1 mm) of mesostasis, opaque, plagioclase (An45), microlites, orthopyroxene with clinopyroxene rims and clinopyroxene. Plagioclase phenocrysts (An55 - An64) are up to 6.75 mm and some have normal zoning, and there is occasional oscillatory zoning. Orthopyroxene phenocrysts are up to 2.63 mm. 62.6% matrix, 25.9% plagioclase, 0.1% clinopyroxene, 7.8% orthopyroxene, 3.6% 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
94SJP6362.28155869-143.1896Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R12E, S21Top flow from a vertical face on the summit of Gutbuster. Several flows can be seen on this face when flying past. Fine to medium grained, holocrystalline, porphyritic with a matrix (here up to 0.1 mm) of mesostasis, opaque, plagioclase (An45), microlites, orthopyroxene with clinopyroxene rims and clinopyroxene. Plagioclase phenocrysts (An55 - An64) are up to 6.75 mm and some have normal zoning, and there is occasional oscillatory zoning. Orthopyroxene phenocrysts are up to 2.63 mm. 62.6% matrix, 25.9% plagioclase, 0.1% clinopyroxene, 7.8% orthopyroxene, 3.6% vesicles.94SJP63LavaWhole-rock 59.42 0.71 17.14 5.45 0.1 4.99 6.86 3.87 1.34 0.2 100.2955DCP6.045.45LOI=-0.12DCP 23.1 500 611 15 128 5.3 2.6 2.1 15.8 141 176 106 52 67 17.4 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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