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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 IDMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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-5Whole 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=0.05RAPIDAB V=0.009, M=NN, R=315;S V=0.02, M=RAPIDA, R=315;Ba V=0.1, M=NN, R=315;Sr V=0.1, M=NN, R=315;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.02, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0, M=NN, R=315;Cr V=0, M=NN, R=315;Cu V=0.002, M=NN, R=315;Ga V=0, M=NN, R=315;Mo V=0.001, M=NN, R=315;Ni V=0, M=NN, R=315;Sc V=0.001, M=NN, R=315;V V=0.009, M=NN, R=315;

SAMPLE LOCATION

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