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SAMPLE INFO : 94SJP28
Sample ID:94SJP28
Station ID:94SJP28
Latitude:62.43879366
Longitude:-143.1263031
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Approximately 15’ thick flow that is only locally massive at the base of unit nA1 at Site 5. Fine-grained, vesicular, diktytaxitic, holocrystalline, locally intergranular, seriate porphyritic with a matrix of mesostasis, opaque, plagioclase, orthopyroxene, clinopyroxene and yellow alteration. There is a fine granular patch of clinopyroxene partially enclosed in plagioclase (reaction?). Plagioclase phenocrysts (An31 - An53) are up to 2.2 mm and some have sieve textured zones (core, intermediate or rim) and complex zonation. Orthopyroxene phenocrysts are up to 1.1 mm and some have clinopyroxene rims and/or sieve textured zones. Clinopyroxene phenocrysts are up to 0.1 mm and needle-like. An altered phase, olivine?, is present.

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
94SJP2862.43879366-143.1263031Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T8N, R12E, S26Approximately 15’ thick flow that is only locally massive at the base of unit nA1 at Site 5. Fine-grained, vesicular, diktytaxitic, holocrystalline, locally intergranular, seriate porphyritic with a matrix of mesostasis, opaque, plagioclase, orthopyroxene, clinopyroxene and yellow alteration. There is a fine granular patch of clinopyroxene partially enclosed in plagioclase (reaction?). Plagioclase phenocrysts (An31 - An53) are up to 2.2 mm and some have sieve textured zones (core, intermediate or rim) and complex zonation. Orthopyroxene phenocrysts are up to 1.1 mm and some have clinopyroxene rims and/or sieve textured zones. Clinopyroxene phenocrysts are up to 0.1 mm and needle-like. An altered phase, olivine?, is present. 94SJP28LavaWhole-rock 58.53 0.95 17.44 5.84 0.11 4.44 6.87 3.85 1.29 0.22 100.9655DCP6.515.84LOI=0.48DCP 23.2 533 541 21 140 4.4 4.1 1.4 20 173 89 54 50 73 17.8 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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