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SAMPLE INFO : 47AC28
Sample ID:47AC28
Station ID:47AC28
Latitude:52.36142
Longitude:175.93775
Datum:NAD83
Date Sampled:1947-01-01
Sample Type 1:Lava
Text Description:
Sample typical of East Cape volcanic rocks. Dense, medium gray rocks, with 80 to 90% of plagioclase, ranging in composition from An50 to An70; 10 to 15% of hornblende, which is brown, with a deep black resorption border and a low extinction angle; and about 1% of hypersthene. 2% of magnetite and a small amount of apatite, in cloudy prisms ranging in size from 0.2 to 0.02 mm, are also present. The groundmass is a very fine-grained unorientated aggregate of prisms of oxyhornblende, augite, laths of plagioclase, and grains of magnetite, with a little interstitial orthoclase.

References:
Geology of Buldir Island, 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
47AC2852.36142175.93775Unknown, Unknown1947-01-01 East CapeSample typical of East Cape volcanic rocks. Dense, medium gray rocks, with 80 to 90% of plagioclase, ranging in composition from An50 to An70; 10 to 15% of hornblende, which is brown, with a deep black resorption border and a low extinction angle; and about 1% of hypersthene. 2% of magnetite and a small amount of apatite, in cloudy prisms ranging in size from 0.2 to 0.02 mm, are also present. The groundmass is a very fine-grained unorientated aggregate of prisms of oxyhornblende, augite, laths of plagioclase, and grains of magnetite, with a little interstitial orthoclase.47AC28LavaWhole-rock 60.39 0.6 18 4.39 0.11 2.98 6.85 0.19Total calculated from mixed methods 100.3272NN2.082.52Cl=0.72; F=0.02; H2OM=0.08; H2OP=0.3NN units are percent 0.03units are percent 0.05n.d. 0 units are percent 0.004 n.d. 0 0.007units are percent 0.002 0.001units are percent 0.001units are percent 0.003n.d. 0units are percent 0.0009n.d. 0n.d. 0 272SPECNa2O V=4.04, M=FPHOT, R=272;K2O V=1.34, M=FPHOT, R=272;

SAMPLE LOCATION

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