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SAMPLE INFO : 94SJP65
Sample ID:94SJP65
Station ID:94SJP65
Latitude:62.27100267
Longitude:-143.1535156
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
 Text Description:
At least 20’ thick, plagioclase-phyric, locally glassy flow overlying lahar/pyroclastic flow that erodes into spires at Gutbuster. Fine grained, vesicular, holocrystalline, intersertal, porphyritic with a matrix of devitrified brown glass, plagioclase, clinopyroxene?, microlites and opaque. Plagioclase phenocrysts (An42 - An59) are up to 7.0 mm and commonly are oscillatory zoned, and occasionally have rounded, resorbed rims, or resorption embayments. Clinopyroxene phenocrysts are up to 1.4 mm. Orthopyroxene phenocrysts are up to 1.65 mm. Opaque phenocrysts are up to 0.65 mm. 70.0% matrix, 13.8% plagioclase, 1.8% clinopyroxene, 3.6% orthopyroxene, 1.7% opaque, 9.1% vesicles. Trachydacite.

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
94SJP6562.27100267-143.1535156Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R12E, S27At least 20’ thick, plagioclase-phyric, locally glassy flow overlying lahar/pyroclastic flow that erodes into spires at Gutbuster. Fine grained, vesicular, holocrystalline, intersertal, porphyritic with a matrix of devitrified brown glass, plagioclase, clinopyroxene?, microlites and opaque. Plagioclase phenocrysts (An42 - An59) are up to 7.0 mm and commonly are oscillatory zoned, and occasionally have rounded, resorbed rims, or resorption embayments. Clinopyroxene phenocrysts are up to 1.4 mm. Orthopyroxene phenocrysts are up to 1.65 mm. Opaque phenocrysts are up to 0.65 mm. 70.0% matrix, 13.8% plagioclase, 1.8% clinopyroxene, 3.6% orthopyroxene, 1.7% opaque, 9.1% vesicles. Trachydacite.94SJP65LavaWhole-rock 63.89 0.98 15.41 6.03 0.13 1.3 3.46 4.9 2.69 0.41 99.755DCP6.636.03LOI=0.79DCP 55 843 308 52 495 14.2 8.2 2.6 12.3 53bdl 4 11 93 21.5 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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