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SAMPLE INFO : 54-F-57
Sample ID:54-F-57
Station ID:54-F-57
Latitude:53.798
Longitude:-167.006
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Basalt
Text Description:
Olivine-bearing basalt porphyry from Makushin basalt and andesite, 2 1/2 miles southwest of Pakushin Cone. It is pale purple to medium light gray and contains plagioclase, pyroxene, and olivine phenocrysts 1-2 millimeters long. Phenocrysts compose 15 percent of the rock: 9 percent labradorite, which forms euhedral to subhedral stubby crystals having normal and oscillatory zones; 2 percent subhedral augite(?); 3 percent anhedral olivine with augite(?) reaction rims ; 1 percent subhedral to anhedral and embayed magnetite(?). The groundmass has crudely trachytic to intergranular texture and includes abundant subhedral laths and stubby crystals of calcic labradorite, much granular augite(?); a trace of a granular opaque mineral, and a trace of cristobalite(?). Alteration is slight; olivine and magnetite(?) alter to hematite and limonite.

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-5753.798-167.006Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 2 1/2 mi SW of Pakushin ConeOlivine-bearing basalt porphyry from Makushin basalt and andesite, 2 1/2 miles southwest of Pakushin Cone. It is pale purple to medium light gray and contains plagioclase, pyroxene, and olivine phenocrysts 1-2 millimeters long. Phenocrysts compose 15 percent of the rock: 9 percent labradorite, which forms euhedral to subhedral stubby crystals having normal and oscillatory zones; 2 percent subhedral augite(?); 3 percent anhedral olivine with augite(?) reaction rims ; 1 percent subhedral to anhedral and embayed magnetite(?). The groundmass has crudely trachytic to intergranular texture and includes abundant subhedral laths and stubby crystals of calcic labradorite, much granular augite(?); a trace of a granular opaque mineral, and a trace of cristobalite(?). Alteration is slight; olivine and magnetite(?) alter to hematite and limonite.54-F-57Whole Rock 53.97 1.2 18.35 0.18 3.81 8.52 3.81 0.98 0.35 100.05533XRF3.515.32LOI=0.34XRFB V=0.003, M=NN, R=315;S V=0, M=RAPIDA, R=315;Ba V=0.03, M=NN, R=315;Sr V=0.08, M=NN, R=315;K V=8136, M=CALC, R=533;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.009, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.002, M=NN, R=315;Cu V=0.006, M=NN, R=315;Ga V=0.002, M=NN, R=315;Mo V=0, M=NN, R=315;Ni V=0, M=NN, R=315;Sc V=0.004, M=NN, R=315;V V=0.02, M=NN, R=315;Ti V=7195, M=CALC, R=533;
54-F-5753.798-167.006Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 2 1/2 mi SW of Pakushin ConeOlivine-bearing basalt porphyry from Makushin basalt and andesite, 2 1/2 miles southwest of Pakushin Cone. It is pale purple to medium light gray and contains plagioclase, pyroxene, and olivine phenocrysts 1-2 millimeters long. Phenocrysts compose 15 percent of the rock: 9 percent labradorite, which forms euhedral to subhedral stubby crystals having normal and oscillatory zones; 2 percent subhedral augite(?); 3 percent anhedral olivine with augite(?) reaction rims ; 1 percent subhedral to anhedral and embayed magnetite(?). The groundmass has crudely trachytic to intergranular texture and includes abundant subhedral laths and stubby crystals of calcic labradorite, much granular augite(?); a trace of a granular opaque mineral, and a trace of cristobalite(?). Alteration is slight; olivine and magnetite(?) alter to hematite and limonite.54-F-57Whole Rock 54 1.2 18.4 8.4 0.18 3.8 8.5 3.8 0.98 0.35Total not given in table. 100.1315RAPIDA3.55.3H2OM=0.07; H2OP=0.27; CO2=0.05RAPIDAB V=0.003, M=NN, R=315;S V=0, M=RAPIDA, R=315;Ba V=0.03, M=NN, R=315;Sr V=0.08, M=NN, R=315;K V=8136, M=CALC, R=533;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.009, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.002, M=NN, R=315;Cu V=0.006, M=NN, R=315;Ga V=0.002, M=NN, R=315;Mo V=0, M=NN, R=315;Ni V=0, M=NN, R=315;Sc V=0.004, M=NN, R=315;V V=0.02, M=NN, R=315;Ti V=7195, M=CALC, R=533;

SAMPLE LOCATION

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