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SAMPLE INFO : 54-F-57
Sample ID:54-F-57
Station ID:54-F-57
Latitude:53.798
Longitude:-167.00598
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 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-5753.798-167.00598Fraser, 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-57LavaWhole-rock 53.97 1.2 18.35 0.18 3.81 8.52 3.81 0.98 0.35 100.05533XRF3.515.32LOI=0.34XRF 8136533CALC
54-F-5753.798-167.00598Fraser, 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-57LavaWhole-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=0.05RAPIDA units are percent 0.03units are percent 0.08 units are percent 0 units are percent 0units are percentunits are percent 0.009 units are percent 0 units are percent 0.004 0.02units are percent 0.002 0.002units are percent 0units are percent 0.006 units are percent 0.002units are percent 0 315NN

SAMPLE LOCATION

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