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SAMPLE INFO : 54-D-33
Sample ID:54-D-33
Station ID:54-D-33
Latitude:53.894
Longitude:-166.69198
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Basalt
Text Description:
Olivine basalt porphyry from the Makushin volcanics 4 1/4 miles south of Tabletop Mountain and 4 miles east of Sugarloaf Cone. It is medium dark gray to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 30 percent of the rock : 15 percent labradorite (?) , which forms euhedral laths to anhedral fragments, and stubby crystals, and which contains oscillatory and normal zones, and zones of dusty inclusions; 10 percent augite or diopside, which form faintly zoned euhedral grains and fragments ; 5 percent subhedral to anhedral olivine. The groundmass has a granular to flow texture and consists of abundant plagioclase, much clinopyroxene and a black opaque mineral, and traces of olivine(?) and cristobalite. Alteration is sparse; chlorite (?) replaces 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-D-3353.894-166.69198Drewes, Harald1954-01-01 MakushinMakushin volcanics from 2 1/2 mi W of Broad Bay, 4 1/4 miles south of Tabletop Mountain and 4 miles east of Sugarloaf ConeOlivine basalt porphyry from the Makushin volcanics 4 1/4 miles south of Tabletop Mountain and 4 miles east of Sugarloaf Cone. It is medium dark gray to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 30 percent of the rock : 15 percent labradorite (?) , which forms euhedral laths to anhedral fragments, and stubby crystals, and which contains oscillatory and normal zones, and zones of dusty inclusions; 10 percent augite or diopside, which form faintly zoned euhedral grains and fragments ; 5 percent subhedral to anhedral olivine. The groundmass has a granular to flow texture and consists of abundant plagioclase, much clinopyroxene and a black opaque mineral, and traces of olivine(?) and cristobalite. Alteration is sparse; chlorite (?) replaces olivine.54-D-33LavaWhole-rock 50.96 0.55 16.35 0.14 9.83 10.93 2.11 0.89 0.12 100.3533XRF3.214.91LOI=0.6XRF 7389533CALC
54-D-3353.894-166.69198Drewes, Harald1954-01-01 MakushinMakushin volcanics from 2 1/2 mi W of Broad Bay, 4 1/4 miles south of Tabletop Mountain and 4 miles east of Sugarloaf ConeOlivine basalt porphyry from the Makushin volcanics 4 1/4 miles south of Tabletop Mountain and 4 miles east of Sugarloaf Cone. It is medium dark gray to grayish purple and contains plagioclase, pyroxene, and olivine phenocrysts 1-4 millimeters long. Phenocrysts compose 30 percent of the rock : 15 percent labradorite (?) , which forms euhedral laths to anhedral fragments, and stubby crystals, and which contains oscillatory and normal zones, and zones of dusty inclusions; 10 percent augite or diopside, which form faintly zoned euhedral grains and fragments ; 5 percent subhedral to anhedral olivine. The groundmass has a granular to flow texture and consists of abundant plagioclase, much clinopyroxene and a black opaque mineral, and traces of olivine(?) and cristobalite. Alteration is sparse; chlorite (?) replaces olivine.54-D-33LavaWhole-rock 50.8 0.55 16.3 7.8 0.14 9.8 10.9 2.1 0.89 0.12Total not given in table. 100.3315RAPIDA3.24.9H2OM=0.14; H2OP=0.46; CO2=0.05RAPIDA units are percent 0.05units are percent 0.1 units are percent 0 units are percent 0units are percent 0.003 units are percent 0 units are percent 0.005 0.02units are percent 0.05 0.005units are percent 0.001units are percent 0.007 units are percent 0units are percent 0 315NN

SAMPLE LOCATION

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