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SAMPLE INFO : P49Se14
Sample ID:P49Se14
Station ID:P49Se14
Latitude:51.98605
Longitude:179.60313
Datum:NAD83
Date Sampled:1947-05-01
Sample Type 1:Lava
Sample Type 2:Flow
Final Unit:Anvil Peak
Text Description:
From a flow, apparently derived from Anvil Peak, that predates the eruption of the dacitic tuff, according to Powers. This is a medium-brownish-gray (5YR 5/1) porphyritic, slightly vesicular basaltic andesite. The phenocrysts (3 mm in size) include bytownite (An82), olivine (Fa15), and sparse augite that is green in hand specimen. The groundmass is an hyalopilitic web of plagioclase microlites, augite, and magnetite.

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
P49Se1451.98605179.60313Powers, H. A.1947-05-01 Anvil Peak(117,375 E., 10,750 N.)From a flow, apparently derived from Anvil Peak, that predates the eruption of the dacitic tuff, according to Powers. This is a medium-brownish-gray (5YR 5/1) porphyritic, slightly vesicular basaltic andesite. The phenocrysts (3 mm in size) include bytownite (An82), olivine (Fa15), and sparse augite that is green in hand specimen. The groundmass is an hyalopilitic web of plagioclase microlites, augite, and magnetite.P49Se14LavaAnvil PeakWhole-rock 53.48 0.9 18.43 8.53 0.18 4.42 9 3.23 1.18 0.22 99.99368NN2.246.49H2OP=0.34; H2OM=0.06; CO2=0NN 22.8 450 14.6 units are percent 0.98745XRF: Rb, Sr, Ni; NN: K;
P49Se1451.98605179.60313Powers, H. A.1947-05-01 Anvil Peak(117,375 E., 10,750 N.)From a flow, apparently derived from Anvil Peak, that predates the eruption of the dacitic tuff, according to Powers. This is a medium-brownish-gray (5YR 5/1) porphyritic, slightly vesicular basaltic andesite. The phenocrysts (3 mm in size) include bytownite (An82), olivine (Fa15), and sparse augite that is green in hand specimen. The groundmass is an hyalopilitic web of plagioclase microlites, augite, and magnetite.P49Se14LavaAnvil PeakWhole-rock H2OP=0.34; H2OM=0.06; CO2=0NN 21.4 89.6 242 27.8 25.6 785 334 201XRF
P49Se1451.98605179.60313Powers, H. A.1947-05-01 Anvil Peak(117,375 E., 10,750 N.)From a flow, apparently derived from Anvil Peak, that predates the eruption of the dacitic tuff, according to Powers. This is a medium-brownish-gray (5YR 5/1) porphyritic, slightly vesicular basaltic andesite. The phenocrysts (3 mm in size) include bytownite (An82), olivine (Fa15), and sparse augite that is green in hand specimen. The groundmass is an hyalopilitic web of plagioclase microlites, augite, and magnetite.P49Se14LavaAnvil PeakWhole-rock H2OP=0.34; H2OM=0.06; CO2=0NN units are percent 0.06units are percent 0.07 units are percent 0.002 units are percent 0.005 0.02units are percent 0.004 0.003units are percent 0.002units are percent 0.01 units are percent 0.003 368SPEC

SAMPLE LOCATION

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