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SAMPLE INFO : 54-D-94
Sample ID:54-D-94
Station ID:54-D-94
Latitude:53.904
Longitude:-166.815
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 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-D-9453.904-166.815Drewes, 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-94Whole Rock 56.38 0 17.47 0 4.06 8.23 3.56 1.22 0.25 98.73533XRF2.845.99LOI=0.28XRFB V=0.005, M=NN, R=315;S V=0, M=RAPIDA, R=315;Ba V=0.07, M=NN, R=315;Sr V=0.1, M=NN, R=315;K V=10129, M=CALC, R=533;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.008, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.003, M=NN, R=315;Cu V=0.009, 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=0.006, M=NN, R=315;V V=0.02, M=NN, R=315;Ti V=0, M=CALC, R=533;
54-D-9453.904-166.815Drewes, 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-94Whole 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=0.05RAPIDAB V=0.005, M=NN, R=315;S V=0, M=RAPIDA, R=315;Ba V=0.07, M=NN, R=315;Sr V=0.1, M=NN, R=315;K V=10129, M=CALC, R=533;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.008, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.003, M=NN, R=315;Cu V=0.009, 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=0.006, M=NN, R=315;V V=0.02, M=NN, R=315;Ti V=0, M=CALC, R=533;

SAMPLE LOCATION

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