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SAMPLE INFO : 93SJP38B
Sample ID:93SJP38B
Station ID:93SJP38B
Latitude:62.44323839
Longitude:-143.1246
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Tephra Fall
Sample Type 2:Agglutinate
Field Lithology:Andesite
Text Description:
Agglutinate from immediately above the lahar/pyroclastic flow at Site 5. The very base of the unit nA1. Fine-grained, vesicular, intersertal, hypocrystalline, seriate matrix of dark brown glass and skeletal plagioclase. There are rare granular masses of pyroxene. Plagioclase phenocrysts (An27 - An59) are up to 1.5 mm and some have complex zoning and/or sieve textured zones, many have tooth-like overgrowths, some have rounded rims. Orthopyroxene phenocrysts are up to 1.25 mm and occasionally have clinopyroxene rims or rarely have brown glass embayments, some are sieve textured, and some appear to have grown around or partially around plagioclase grains. Clinopyroxene phenocrysts are up to 0.3 mm.

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
93SJP38B62.44323839-143.1246Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T8N, R12E, S26Agglutinate from immediately above the lahar/pyroclastic flow at Site 5. The very base of the unit nA1. Fine-grained, vesicular, intersertal, hypocrystalline, seriate matrix of dark brown glass and skeletal plagioclase. There are rare granular masses of pyroxene. Plagioclase phenocrysts (An27 - An59) are up to 1.5 mm and some have complex zoning and/or sieve textured zones, many have tooth-like overgrowths, some have rounded rims. Orthopyroxene phenocrysts are up to 1.25 mm and occasionally have clinopyroxene rims or rarely have brown glass embayments, some are sieve textured, and some appear to have grown around or partially around plagioclase grains. Clinopyroxene phenocrysts are up to 0.3 mm.93SJP38BTephra FallCumulateWhole-rock 57.6 0.9 17.2 5.97 0.11 4.99 7.32 3.6 1.26 0.22 100.5855DCP6.635.97LOI=0.76DCP 23.5 466 542 17 129 4.9 3.1 2 18.8 151 127 65 41 61 16.8 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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