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SAMPLE INFO : 81ARj 11b
Sample ID:81ARj 11b
Station ID:81ARj 11b
Latitude:57.707612521224
Longitude:-156.41
Datum:NAD83
Date Sampled:1981-01-01
Sample Type 1:Other
Sample Type 2:Breccia
Field Lithology:Dacite
Text Description:
Vitric clast from volcanic breccia. Porphyritic plagioclase-pyroxene-hornblende dacite (S; high-silica andesite G). Glassy groundmass contains abundant randomly oriented phenocrysts of plagioclase (An 70), clinopyroxene, hornblende, and biotite. Clinopyroxene are pleochroic from tan to pale green, hornblende is pleochroic from brown to yellow brown. Hornblende and biotite crystals outlined in opaque minerals, clinopyroxene altered on edges to brown aphanitic phase. Plagioclase is variably zoned.

References:
Map and tables showing geochronology and whole-rock geochemistry of selected samples, Ugashik and part of Karluk quadrangles, Alaska

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
81ARj 11b57.707612521224-156.41Riehle, J. R.1981-01-01 Ugashik calderaUgashik C-2, Ugashik calderaVitric clast from volcanic breccia. Porphyritic plagioclase-pyroxene-hornblende dacite (S; high-silica andesite G). Glassy groundmass contains abundant randomly oriented phenocrysts of plagioclase (An 70), clinopyroxene, hornblende, and biotite. Clinopyroxene are pleochroic from tan to pale green, hornblende is pleochroic from brown to yellow brown. Hornblende and biotite crystals outlined in opaque minerals, clinopyroxene altered on edges to brown aphanitic phase. Plagioclase is variably zoned.81ARj 11bOtherQuenched InclusionWhole-rock 62.5 0.59 17.8 4.79 0.12 2.74 6.44 3.4 1.46 0.14 98.064092XRF3.351.67

SAMPLE LOCATION

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