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SAMPLE INFO : 54-F-32
Sample ID:54-F-32
Station ID:54-F-32
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Andesite porphyry from the Unalaska formation along the shore halfway between Humpback Bay and the mouth of Glacier River in Makushin Bay. It is medium gray to medium bluish gray and contains phenocrysts 2 to 4 millimeters long. Phenocrysts compose 10 percent of the rock ; 8 percent sodic andesine, which forms embayed crystals and subhedral to anhedral laths and which contains normal and oscillatory zones and zones of dusty inclusions;2 percent augite(?), which forms euhedral to subhedral crystals, crystal clusters, and pseudomorphs of penninite(?) ; a trace of ilmenitic magnetite, which forms subhedral to anhedral crystals and embayed crystals. The groundmass has a felty to flow texture and consists of abundant subhedral laths of sodic andesine, much pyroxene, and traces of a granular black opaque mineral. Alteration is slight; there are traces of disseminated penninite(?) and uralite(?) and veinlets of epidote and quartz.

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-F-3253.88707-166.93202Fraser, G. D.1954-01-01 MakushinUnalaska formation from 1 1/2 mi W of Humpback BayAndesite porphyry from the Unalaska formation along the shore halfway between Humpback Bay and the mouth of Glacier River in Makushin Bay. It is medium gray to medium bluish gray and contains phenocrysts 2 to 4 millimeters long. Phenocrysts compose 10 percent of the rock ; 8 percent sodic andesine, which forms embayed crystals and subhedral to anhedral laths and which contains normal and oscillatory zones and zones of dusty inclusions;2 percent augite(?), which forms euhedral to subhedral crystals, crystal clusters, and pseudomorphs of penninite(?) ; a trace of ilmenitic magnetite, which forms subhedral to anhedral crystals and embayed crystals. The groundmass has a felty to flow texture and consists of abundant subhedral laths of sodic andesine, much pyroxene, and traces of a granular black opaque mineral. Alteration is slight; there are traces of disseminated penninite(?) and uralite(?) and veinlets of epidote and quartz.54-F-32Whole Rock 56 1 17.9 7 0.16 3.2 7.5 3.6 1.8 0.28Total not given in table. 100.16315RAPIDA34H2OM=0.06; H2OP=1.5; CO2=0.05RAPIDAB V=0.002, M=NN, R=315;S V=0.01, M=RAPIDA, R=315;Ba V=0.07, M=NN, R=315;Sr V=0.07, M=NN, R=315;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.01, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.002, M=NN, R=315;Cu V=0.01, 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=0.003, M=NN, R=315;V V=0.03, M=NN, R=315;

SAMPLE LOCATION

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