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SAMPLE INFO : 47AC99
Sample ID:47AC99
Station ID:47AC99
Latitude:51.92305
Longitude:179.68147
Datum:NAD83
Date Sampled:1947-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Basalt
Final Unit:Ragged Top
 Text Description:
Specimen 47AC99 is olivine basalt from one of the latest flows from Ragged Top (148,800' E., 276,000' N.). The flow is about 20 feet thick, consists of medium-gray (N5) holocrystalline-porphyrytic dosemic basalt, with pilotaxitic texture. The phenocrysts consist of plagioclase (2 mm in diameter), averaging about An82, olivine (0.5 mm in diameter), augite (2 mm in diameter) that is dark green in hand specimen, and magnetite (0.5 mm in diameter). The groundmass consists of magnetite, augite, plagioclase, and interstitial orthoclase (?) .

References:
Geologic reconnaissance of Semisopochnoi Island, western Aleutian Islands, Alaska
Postglacial eruptive history and geochemistry of Semisopochnoi volcano, western 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
47AC9951.92305179.68147Unknown, Unknown1947-01-01 Ragged TopFlow from Ragged Top (148,800' E., 276,000' N.).Specimen 47AC99 is olivine basalt from one of the latest flows from Ragged Top (148,800' E., 276,000' N.). The flow is about 20 feet thick, consists of medium-gray (N5) holocrystalline-porphyrytic dosemic basalt, with pilotaxitic texture. The phenocrysts consist of plagioclase (2 mm in diameter), averaging about An82, olivine (0.5 mm in diameter), augite (2 mm in diameter) that is dark green in hand specimen, and magnetite (0.5 mm in diameter). The groundmass consists of magnetite, augite, plagioclase, and interstitial orthoclase (?) .47AC99LavaRagged TopWhole-rock 52.31 0.87 21.43 7.61 0.19 2.9 9.92 3.34 1.1 0.16 99.84368NN3.214.68H2OP=0.11; H2OM=0.06; CO2=0NN 16.1 561 6.4 units are percent 0.9745XRF: Rb, Sr, Ni; NN: K;
47AC9951.92305179.68147Unknown, Unknown1947-01-01 Ragged TopFlow from Ragged Top (148,800' E., 276,000' N.).Specimen 47AC99 is olivine basalt from one of the latest flows from Ragged Top (148,800' E., 276,000' N.). The flow is about 20 feet thick, consists of medium-gray (N5) holocrystalline-porphyrytic dosemic basalt, with pilotaxitic texture. The phenocrysts consist of plagioclase (2 mm in diameter), averaging about An82, olivine (0.5 mm in diameter), augite (2 mm in diameter) that is dark green in hand specimen, and magnetite (0.5 mm in diameter). The groundmass consists of magnetite, augite, plagioclase, and interstitial orthoclase (?) .47AC99LavaRagged TopWhole-rock H2OP=0.11; H2OM=0.06; CO2=0NN 22.1 95.9 203 9.6 19.5 74.2 61.7 201XRF
47AC9951.92305179.68147Unknown, Unknown1947-01-01 Ragged TopFlow from Ragged Top (148,800' E., 276,000' N.).Specimen 47AC99 is olivine basalt from one of the latest flows from Ragged Top (148,800' E., 276,000' N.). The flow is about 20 feet thick, consists of medium-gray (N5) holocrystalline-porphyrytic dosemic basalt, with pilotaxitic texture. The phenocrysts consist of plagioclase (2 mm in diameter), averaging about An82, olivine (0.5 mm in diameter), augite (2 mm in diameter) that is dark green in hand specimen, and magnetite (0.5 mm in diameter). The groundmass consists of magnetite, augite, plagioclase, and interstitial orthoclase (?) .47AC99LavaRagged TopWhole-rock H2OP=0.11; H2OM=0.06; CO2=0NN units are percent 0.1units are percent 0.09 units are percent 0.009 units are percent 0.001 0.02 0.002units are percent 0.0007units are percent 0.01 units are percent 0.003 368SPEC

SAMPLE LOCATION

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