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SAMPLE INFO : 93SJP28
Sample ID:93SJP28
Station ID:93SJP28
Latitude:62.4321
Longitude:-143.1051918
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Rhyolite
Text Description:
Blocky, rubbly outcrop from Dome A at Site 2. Fine grained, vesicular, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz?, opaque and zircon. Plagioclase phenocrysts (An24) are up to 1.5 mm and some have polysynthetic twinning, but untwinned feldspar also is present. Symplectic intergrowths of feldspar and quartz are up to 0.15 mm. There is an altered grain, amphibole?, consisting of an opaque aggregate with a small core. 91.7% matrix, 2.6% plagioclase, 5.7% vesicles.

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
93SJP2862.4321-143.1051918Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T8N, R12E, S36Blocky, rubbly outcrop from Dome A at Site 2. Fine grained, vesicular, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz?, opaque and zircon. Plagioclase phenocrysts (An24) are up to 1.5 mm and some have polysynthetic twinning, but untwinned feldspar also is present. Symplectic intergrowths of feldspar and quartz are up to 0.15 mm. There is an altered grain, amphibole?, consisting of an opaque aggregate with a small core. 91.7% matrix, 2.6% plagioclase, 5.7% vesicles.93SJP28LavaWhole-rock 75.06 0.07 14.45 0.87 0.03 0.1 1.03 4.71 3.05 0.04 99.755DCP0.970.87LOI=0.58DCP 53 912 161 18.9 38 15 2.6 0.6 2.1 2.5 1.4 1.5 0.2 15 108 9 2.2 2.5 1.4bdl bdl bdl 0 33 15.4 55XRF: Rb, Zr, Nb, Th, U, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, Sc; MX: Sr, Y, Zn;

SAMPLE LOCATION

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