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SAMPLE INFO : 54-F-5
Sample ID:54-F-5
Station ID:54-F-5
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Dacite
Text Description:
Pyrite-bearing dacite vitrophyre from the Unalaska formation 1mile east of Chernofski Harbor. It is black and contains plagioclase phenocrysts 1 to 4 millimeters long. Phenocrysts compose 5 percent of the rock: 2 percent calcic labradorite, which form embayed crystals, euhedral laths and stubby crystals, and fragments, and which have oscillatory zones and apatite inclusions ; 1 percent euhedral augite (?) ; 1 percent euhedral hypersthene; and a trace of euhedral to subhedral ilmenitic magnetite. Microlites of plagioclase are common and of apatite rare. The groundmass is a perlitic glass, which contains a few small chlorite(?) spherulites.

References:
Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, 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
54-F-553.88707-166.93202Fraser, G. D.1954-01-01 MakushinUnalaska formation from 1 mi E of Chernofski HarborPyrite-bearing dacite vitrophyre from the Unalaska formation 1mile east of Chernofski Harbor. It is black and contains plagioclase phenocrysts 1 to 4 millimeters long. Phenocrysts compose 5 percent of the rock: 2 percent calcic labradorite, which form embayed crystals, euhedral laths and stubby crystals, and fragments, and which have oscillatory zones and apatite inclusions ; 1 percent euhedral augite (?) ; 1 percent euhedral hypersthene; and a trace of euhedral to subhedral ilmenitic magnetite. Microlites of plagioclase are common and of apatite rare. The groundmass is a perlitic glass, which contains a few small chlorite(?) spherulites.54-F-5LavaWhole-rock 60.7 0.7 14.7 5.1 0.14 1.6 5 4 1.1 0.3Total not given in table. 101.11315RAPIDA23.2H2OM=1.2; H2OP=5.4; CO2=0.05RAPIDA units are percent 0.1units are percent 0.1 units are percent 0 units are percent 0units are percent 0.02 units are percent 0 units are percent 0.001 0.009units are percent 0 0units are percent 0units are percent 0.002 units are percent 0units are percent 0.001 315NN

SAMPLE LOCATION

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