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SAMPLE INFO : 54-D-94
Sample ID:54-D-94
Station ID:54-D-94
Latitude:53.904
Longitude:-166.81498
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Olivine-bearing andesite porphyry from a flow in the Eider Point basalt 1/2 mile southeast of Sugarloaf Cone. It is medium gray and contains plagioclase, olivine, and pyroxene phenocrysts 1-3 millimeters long. Phenocrysts compose 30 percent of the rock: 15 percent calcic andesine to sodic labradorite, which forms embayed crystals, euhedral laths, and fragments, and which has normal and oscillatory zones, zones of dusty inclusions, and apatite inclusions; 10 percent euhedral to anhedral augite(?), of which one crystal has a reaction rim of granular olivine, one crystal has an inner rim of granular olivine and an outer rim of clinopyroxene, and one crystal has a clinopyroxene rim; 3 percent subhedral hypersthene, which has augite(?) reaction rims, and one crystal of which has an olivine(?) and myrmekitic magnetite(?) rim; and 2 percent anhedral olivine with clinopyroxene reaction rims. The groundmass has a felty to granular texture and consists of abundant subhedral labradorite, much clinopyroxene and granular olivine(?), and traces of a granular black opaque mineral and cristobalite.

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-9453.904-166.81498Drewes, Harald1954-01-01 MakushinEider Point basalt 1/2 mile southeast of Sugarloaf ConeOlivine-bearing andesite porphyry from a flow in the Eider Point basalt 1/2 mile southeast of Sugarloaf Cone. It is medium gray and contains plagioclase, olivine, and pyroxene phenocrysts 1-3 millimeters long. Phenocrysts compose 30 percent of the rock: 15 percent calcic andesine to sodic labradorite, which forms embayed crystals, euhedral laths, and fragments, and which has normal and oscillatory zones, zones of dusty inclusions, and apatite inclusions; 10 percent euhedral to anhedral augite(?), of which one crystal has a reaction rim of granular olivine, one crystal has an inner rim of granular olivine and an outer rim of clinopyroxene, and one crystal has a clinopyroxene rim; 3 percent subhedral hypersthene, which has augite(?) reaction rims, and one crystal of which has an olivine(?) and myrmekitic magnetite(?) rim; and 2 percent anhedral olivine with clinopyroxene reaction rims. The groundmass has a felty to granular texture and consists of abundant subhedral labradorite, much clinopyroxene and granular olivine(?), and traces of a granular black opaque mineral and cristobalite.54-D-94LavaWhole-rock 56.38 0 17.47 0 4.06 8.23 3.56 1.22 0.25 98.73533XRF2.845.99LOI=0.28XRF 10129533CALC
54-D-9453.904-166.81498Drewes, Harald1954-01-01 MakushinEider Point basalt 1/2 mile southeast of Sugarloaf ConeOlivine-bearing andesite porphyry from a flow in the Eider Point basalt 1/2 mile southeast of Sugarloaf Cone. It is medium gray and contains plagioclase, olivine, and pyroxene phenocrysts 1-3 millimeters long. Phenocrysts compose 30 percent of the rock: 15 percent calcic andesine to sodic labradorite, which forms embayed crystals, euhedral laths, and fragments, and which has normal and oscillatory zones, zones of dusty inclusions, and apatite inclusions; 10 percent euhedral to anhedral augite(?), of which one crystal has a reaction rim of granular olivine, one crystal has an inner rim of granular olivine and an outer rim of clinopyroxene, and one crystal has a clinopyroxene rim; 3 percent subhedral hypersthene, which has augite(?) reaction rims, and one crystal of which has an olivine(?) and myrmekitic magnetite(?) rim; and 2 percent anhedral olivine with clinopyroxene reaction rims. The groundmass has a felty to granular texture and consists of abundant subhedral labradorite, much clinopyroxene and granular olivine(?), and traces of a granular black opaque mineral and cristobalite.54-D-94LavaWhole-rock 55.8 0.94 17.3 8.4 0.17 4 8.1 3.5 1.2 0.25Total not given in table. 99.84315RAPIDA2.85.9H2OM=0.07; H2OP=0.21; CO2=0.05RAPIDA units are percent 0.07units are percent 0.1 units are percent 0 units are percent 0units are percent 0.008 units are percent 0 units are percent 0.006 0.02units are percent 0.003 0.002units are percent 0units are percent 0.009 units are percent 0.002units are percent 0 315NN

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