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SAMPLE INFO : 93SJP55
Sample ID:93SJP55
Station ID:93SJP55
Latitude:62.41434749
Longitude:-143.1601895
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Rhyolite
Text Description:
Block from the upper part of the carapace of Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz, opaque and alteration. Plagioclase phenocrysts (An31 - An45) are up to 2.95 mm and tend to be rounded, frequently have strong oscillatory zoning and some mica alteration is present. Opaque phenocrysts are up to 0.45 mm. There is an altered phase that now consists of opaque rim with granular core of an unidentifiable high relief mineral ± feldspar. A second altered phase, larger in size, is now serpentine/chlorite. 82.0% matrix, 14.7% plagioclase, 0.2% opaque, 0.6% altered phase, 0.2% alteration, 2.3% 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
93SJP5562.41434749-143.1601895Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T7N, R12E, S3Block from the upper part of the carapace of Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz, opaque and alteration. Plagioclase phenocrysts (An31 - An45) are up to 2.95 mm and tend to be rounded, frequently have strong oscillatory zoning and some mica alteration is present. Opaque phenocrysts are up to 0.45 mm. There is an altered phase that now consists of opaque rim with granular core of an unidentifiable high relief mineral ± feldspar. A second altered phase, larger in size, is now serpentine/chlorite. 82.0% matrix, 14.7% plagioclase, 0.2% opaque, 0.6% altered phase, 0.2% alteration, 2.3% vesicles.93SJP55LavaWhole-rock 70.58 0.35 15.6 2.34 0.08 0.59 2.27 4.95 2.34 0.14 99.155DCP2.572.34LOI=0.78DCP 42 756 292 16 178 6.8 3.6 1.6 3.8 14bdl 1 4 62 16.3 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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