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SAMPLE INFO : 54-F-53
Sample ID:54-F-53
Station ID:54-F-53
Latitude:53.847
Longitude:-166.96498
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Basalt
Text Description:
Olivine-bearing feldspathic basalt porphyry from Makushin volcanics, 1 mile northeast of Pakushin Cone. It is pale purple to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 25 percent of the rock: 15 percent sodic labradorite, which forms euhedral stubby crystals and fragments, and which contains faint oscillatory and normal zones, zones of dusty inclusions. And apatite inclusions; 6 percent euhedral to subhedral augite (?); 2 percent hypersthene with thin augite(?) reaction rims; 2 percent euhedral to anhedral olivine; and 1 percent subhedral magnetite(?), with some myrmekitic intergrowth in augite(?). The groundmass has a felty to intergranular texture and consists of sodic labradorite, abundant subhedral laths and stubby crystals of much granular augite (?), a black opaque mineral, and a trace of granular olivine.

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-5353.847-166.96498Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 1 mi N of Pakushin ConeOlivine-bearing feldspathic basalt porphyry from Makushin volcanics, 1 mile northeast of Pakushin Cone. It is pale purple to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 25 percent of the rock: 15 percent sodic labradorite, which forms euhedral stubby crystals and fragments, and which contains faint oscillatory and normal zones, zones of dusty inclusions. And apatite inclusions; 6 percent euhedral to subhedral augite (?); 2 percent hypersthene with thin augite(?) reaction rims; 2 percent euhedral to anhedral olivine; and 1 percent subhedral magnetite(?), with some myrmekitic intergrowth in augite(?). The groundmass has a felty to intergranular texture and consists of sodic labradorite, abundant subhedral laths and stubby crystals of much granular augite (?), a black opaque mineral, and a trace of granular olivine.54-F-53LavaWhole-rock 53.79 0.92 19.19 0.17 3.94 9.3 3.35 0.91 0.18 99.7533XRF3.25.05LOI=0.16XRF 7555533CALC
54-F-5353.847-166.96498Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 1 mi N of Pakushin ConeOlivine-bearing feldspathic basalt porphyry from Makushin volcanics, 1 mile northeast of Pakushin Cone. It is pale purple to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 25 percent of the rock: 15 percent sodic labradorite, which forms euhedral stubby crystals and fragments, and which contains faint oscillatory and normal zones, zones of dusty inclusions. And apatite inclusions; 6 percent euhedral to subhedral augite (?); 2 percent hypersthene with thin augite(?) reaction rims; 2 percent euhedral to anhedral olivine; and 1 percent subhedral magnetite(?), with some myrmekitic intergrowth in augite(?). The groundmass has a felty to intergranular texture and consists of sodic labradorite, abundant subhedral laths and stubby crystals of much granular augite (?), a black opaque mineral, and a trace of granular olivine.54-F-53LavaWhole-rock 53.82 0.92 19.2 7.9 0.17 3.94 9.31 3.35 0.91 0.18 99.79315NN3.195.03H2OM=0.09; H2OP=0.07; CO2=0.01; Cl=0.01; F=0.03NN 15.1 514 5.7 units are percent 0.76745XRF: Rb, Sr, Ni; NN: K;
54-F-5353.847-166.96498Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 1 mi N of Pakushin ConeOlivine-bearing feldspathic basalt porphyry from Makushin volcanics, 1 mile northeast of Pakushin Cone. It is pale purple to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 25 percent of the rock: 15 percent sodic labradorite, which forms euhedral stubby crystals and fragments, and which contains faint oscillatory and normal zones, zones of dusty inclusions. And apatite inclusions; 6 percent euhedral to subhedral augite (?); 2 percent hypersthene with thin augite(?) reaction rims; 2 percent euhedral to anhedral olivine; and 1 percent subhedral magnetite(?), with some myrmekitic intergrowth in augite(?). The groundmass has a felty to intergranular texture and consists of sodic labradorite, abundant subhedral laths and stubby crystals of much granular augite (?), a black opaque mineral, and a trace of granular olivine.54-F-53LavaWhole-rock H2OM=0.09; H2OP=0.07; CO2=0.01; Cl=0.01; F=0.03NN 315

SAMPLE LOCATION

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