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SAMPLE INFO : 94SJP37
Sample ID:94SJP37
Station ID:94SJP37
Latitude:62.427404
Longitude:-143.1238023
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Flow underlying 94SJP36 at Site 3. The outcrop is blocky to platy, 30’ thick with a 15’ vesicular zone. Fine grained, hypocrystalline, intersertal, intergranular, seriate porphyritic with a matrix of brown glass with microlites, mesostasis, opaque and alteration. Plagioclase phenocrysts (An40 - An59) are up to 2.2 mm and some larger grains have sieve textured cores or intermediate zones, some have complex zoning, and a few have orthopyroxene inclusions. Orthopyroxene phenocrysts are up to 0.75 mm and many have clinopyroxene rims (some grains are now mostly clinopyroxene), some have opaque inclusions. Clinopyroxene phenocrysts are up to 0.35 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
94SJP3762.427404-143.1238023Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S35Flow underlying 94SJP36 at Site 3. The outcrop is blocky to platy, 30’ thick with a 15’ vesicular zone. Fine grained, hypocrystalline, intersertal, intergranular, seriate porphyritic with a matrix of brown glass with microlites, mesostasis, opaque and alteration. Plagioclase phenocrysts (An40 - An59) are up to 2.2 mm and some larger grains have sieve textured cores or intermediate zones, some have complex zoning, and a few have orthopyroxene inclusions. Orthopyroxene phenocrysts are up to 0.75 mm and many have clinopyroxene rims (some grains are now mostly clinopyroxene), some have opaque inclusions. Clinopyroxene phenocrysts are up to 0.35 mm.94SJP37LavaWhole-rock 57.87 0.9 17.23 5.88 0.09 4.97 7.36 3.7 1.2 0.26 99.6555DCP6.475.88LOI=0.51DCP 20.9 482 544 14 123 3.3 4 1.2 19 179 114 75 57 60 17.3 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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