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SAMPLE INFO : 93SJP49D
Sample ID:93SJP49D
Station ID:93SJP49D
Latitude:62.48240739
Longitude:-143.0818624
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Basalt
Text Description:
outcrop on the northern nose of the Boyden Hills at Site 1. The outcrop is 100-150' thick and composed of 10-20' thick flows. 93SJP49D is the top flow. Fine grained, holocrystalline, equigranular with a matrix of opaque and alteration. Plagioclase phenocrysts are up to 1.1 mm, occur as subparallel blades and are partially altered. Anhedral plagioclase phenocrysts (An51) are up to 2.36 mm, and fill in between the other phenocrysts or enclose olivine, pyroxene, and/or opaque crystals; most of this plagioclase is untwinned and has undulatory extinction. Olivine phenocrysts are up to 1.3 mm, anhedral, occasionally have resorption embayments, some have opaque inclusions. Titan-augite phenocrysts are up to 1.1 mm. Opaque phenocrysts are up to 0.2 mm. Mode: 7.4% matrix, 51.5% opaque, 1.4% alteration.

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
93SJP49D62.48240739-143.0818624Preece, S. J.1993-00-00 Skookum CreekNabesna B-5, T8N, R13E S7, outcrop on the northern nose of the Boyden Hills at Site 1outcrop on the northern nose of the Boyden Hills at Site 1. The outcrop is 100-150' thick and composed of 10-20' thick flows. 93SJP49D is the top flow. Fine grained, holocrystalline, equigranular with a matrix of opaque and alteration. Plagioclase phenocrysts are up to 1.1 mm, occur as subparallel blades and are partially altered. Anhedral plagioclase phenocrysts (An51) are up to 2.36 mm, and fill in between the other phenocrysts or enclose olivine, pyroxene, and/or opaque crystals; most of this plagioclase is untwinned and has undulatory extinction. Olivine phenocrysts are up to 1.3 mm, anhedral, occasionally have resorption embayments, some have opaque inclusions. Titan-augite phenocrysts are up to 1.1 mm. Opaque phenocrysts are up to 0.2 mm. Mode: 7.4% matrix, 51.5% opaque, 1.4% alteration.93SJP49DLavaWhole-rock 47.85 1.8 15.57 9.23 0.15 9.38 7.96 2.62 1.25 0.4 99.255DCP10.079.23LOI=3.74DCP 13 423 2711 19.8 47.7 24.5 4.9 1.6 4.4 4.3 2.2 2.1 0.3 24 141 8.2 4 1.7 24.8 196 304 163 54 74 15.5 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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