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SAMPLE INFO : 93SJP45
Sample ID:93SJP45
Station ID:93SJP45
Latitude:62.47851817
Longitude:-143.0701957
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Field Lithology:Rhyolite
Text Description:
Outcrop of black vitrophyre, ~4-5 below the epiclastic unit at Site 1 in the Boyden Hills. Sample is from float below the outcrop. Fine grained, hypocrystalline, pilotaxitic, porphyritic to glomeroporphyritic with a matrix of glass, plagioclase, opaque, apatite, zircon, and microlites. Plagioclase phenocrysts (An32 - An35) are up to 3.12 mm and larger grains occasionally have normal zoning. Opaque phenocrysts are up to 0.6 mm,, but most are matrix size. Orthopyroxene phenocrysts are up to 1.1 mm with intense pleochroism and occasionally have opaque inclusions. Biotite? or amphibole? phenocrysts are up to 0.08 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
93SJP4562.47851817-143.0701957Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T8N, R13E, S1893SJP45LavaWhole-rock 72.91 0.11 13.81 1.35 0.07 0.15 0.97 4.73 3.18bdl 0 99.6455DCP1.491.35LOI=2.72DCP 53 833 127 16 142 8.6 4.7 2.9 1.7 1bdl bdl 2 45 15.1 55XRF: Rb, Zr, Nb, Th, U, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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