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SAMPLE INFO : 74ALe-56
Sample ID:74ALe-56
Station ID:74ALe-56
Latitude:62.1204
Longitude:-144.7501
Datum:NAD83
Date Sampled:1974-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Dacite
Sample Unit:Qzdf
Text Description:
Thick lobate flows of dacite and minor rhyodacite that form massive piles along west, northwest, north, and northeast flanks of Mount Drum, apparently erupted from central vent. Rocks are light to pinkish medium gray, weather dark reddish brown, and are porphyritic with phenocrysts (1-3 mm) of plagioclase, hypersthene, hornblende, and rare to minor biotite and augite in a pilotaxitic to trachyitic groundmass. Probably related in age to late hornblende-biotite dacite domes (Qldd).

References:
Geologic map of the Gulkana A-2 quadrangle, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2geologic 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

SAMPLE LOCATION

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Page modified: December 2, 2016 10:12
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