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SAMPLE INFO : 47AC116
Sample ID:47AC116
Station ID:47AC116
Latitude:51.94683
Longitude:179.55766
Datum:NAD83
Date Sampled:1947-01-01
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Andesite vitrophyre from an agglomerate from Three-quarter Cone (121,700' E, 291,900' N). This is a dark-gray rock, aphanitic, with small tabular plagioclase phenocrysts showing a parallel arrangement. About 5 percent of the rock is plagioclase phenocrysts (1 mm in diameter), having an average composition of An58. A few phenocrysts are hypersthene and olivine. The groundmass is mostly plagioclase microlites (0.05 mm long), minute granules of augite(?), and magnetite dust, in brown glass, having an index of 1.546.

References:
Geologic reconnaissance of Semisopochnoi Island, western 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
47AC11651.94683179.55766Unknown, Unknown1947-01-01 Three-quarter coneThree-quarter Cone (121,700' E, 291,900' N)Andesite vitrophyre from an agglomerate from Three-quarter Cone (121,700' E, 291,900' N). This is a dark-gray rock, aphanitic, with small tabular plagioclase phenocrysts showing a parallel arrangement. About 5 percent of the rock is plagioclase phenocrysts (1 mm in diameter), having an average composition of An58. A few phenocrysts are hypersthene and olivine. The groundmass is mostly plagioclase microlites (0.05 mm long), minute granules of augite(?), and magnetite dust, in brown glass, having an index of 1.546.47AC116Whole Rock 59.21 1.03 17.13 7.82 0.2 2.65 6.28 4.38 1.81 0.38 99.09368NN2.095.85H2OP=0.08; H2OM=0.02; CO2=0.01NN 39.8 415 5.7 745XRFB V=0.002, M=SPEC, R=368;Sr V=0.07, M=SPEC, R=368;Ba V=0.07, M=SPEC, R=368;K V=1.49, M=NN, R=745;Y V=0.01, M=SPEC, R=368;Zr V=0.02, M=SPEC, R=368;Cu V=0.001, M=SPEC, R=368;Co V=0.002, M=SPEC, R=368;Ga V=0.003, M=SPEC, R=368;V V=0.02, M=SPEC, R=368;Sc V=0.003, M=SPEC, R=368;

SAMPLE LOCATION

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