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SAMPLE INFO : 46AC107
Sample ID:46AC107
Station ID:46AC107
Latitude:51.9242
Longitude:-177.1623
Datum:NAD83
Date Sampled:1946-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Medium light-gray (N6) slightly vesicular hypocrystalline hypersthene andesite, with seriate texture. Larger plagioclase crystals, from 0.1 to 4 mm in size, range in composition from An77 to An55; most crystals are conspicuously zoned. The larger salite crystals, which attain a size of as much as 1 mm, are dark-greenish and have nZ 1.724, suggesting a composition of Ca50Mg27Fe22. The hypersthene, which is in euhedral prisms from 0.1 to 1 mm, has nZ 1.707, corresponding to a composition of En68Fe32. Magnetite, in irregular grains from 0.2 to 0.01 mm, and apatite, in stubby pseudodichroic prisms, are the principal accessory minerals. The groundmass consists of laths of oligoclase (median composition An23) and needles of pyroxenes, in a mosaic of orthoclase (?) and a clear glass with an index of 1.495 plus/minus 0.003.

References:
Magmatic differentiation in Tertiary and Quaternary volcanic rocks from Adak and Kanaga Islands, 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
46AC10751.9242-177.1623Unknown, Unknown1946-01-01 KanagaLava flow, 3,650 feet south 42.5 degrees east from center of crater of Kanaga volcano.Medium light-gray (N6) slightly vesicular hypocrystalline hypersthene andesite, with seriate texture. Larger plagioclase crystals, from 0.1 to 4 mm in size, range in composition from An77 to An55; most crystals are conspicuously zoned. The larger salite crystals, which attain a size of as much as 1 mm, are dark-greenish and have nZ 1.724, suggesting a composition of Ca50Mg27Fe22. The hypersthene, which is in euhedral prisms from 0.1 to 1 mm, has nZ 1.707, corresponding to a composition of En68Fe32. Magnetite, in irregular grains from 0.2 to 0.01 mm, and apatite, in stubby pseudodichroic prisms, are the principal accessory minerals. The groundmass consists of laths of oligoclase (median composition An23) and needles of pyroxenes, in a mosaic of orthoclase (?) and a clear glass with an index of 1.495 plus/minus 0.003.46AC107Whole Rock 60.06 0.72 16.57 6.63 0.16 2.58 7.23 3.6 2.05 0.25 100.11085NN2.963.96H2OP=0.09; H2OM=0.05NNB V=0.003, M=SPEC, R=1085;Be V=0, M=SPEC, R=1085;Ba V=0.05, M=SPEC, R=1085;Sr V=0.03, M=SPEC, R=1085;La V=0, M=SPEC, R=1085;Zr V=0.007, M=SPEC, R=1085;Pb V=0, M=SPEC, R=1085;Cu V=0.002, M=SPEC, R=1085;Ni V=0.000X0, M=SPEC, R=1085;Co V=0.001, M=SPEC, R=1085;Cr V=0.0007, M=SPEC, R=1085;V V=0.01, M=SPEC, R=1085;Ga V=0.0006, M=SPEC, R=1085;Mo V=0, M=SPEC, R=1085;Ag V=0, M=SPEC, R=1085;In V=0, M=SPEC, R=1085;Cd V=0, M=SPEC, R=1085;As V=0, M=SPEC, R=1085;Sb V=0, M=SPEC, R=1085;Sn V=0, M=SPEC, R=1085;Ge V=0, M=SPEC, R=1085;Tl V=0, M=SPEC, R=1085;

SAMPLE LOCATION

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