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SAMPLE INFO : P49Se6
Sample ID:P49Se6
Station ID:P49Se6
Latitude:51.8938
Longitude:179.636
Datum:NAD83
Date Sampled:1949-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Final Unit:Sugarloaf Head
Text Description:
P49Se6 is from a very recent flow on the eastern shore (142,200' E., 269,550' N.), which Powers considered younger than the most recent eustatic bench, and which is unmantled by ash. Powers estimated the thickness at more than 20 feet, and notes that there was much copper staining. It is a
dense medium-gray rock with conspicuous green augite phenocrysts. It is seriate, with an intergranular texture. The principal constituents are bytownite (An72), augite (Di70He38), and olivine (Fa35) as much as 1 mm in diameter, in part forming clots of small prisms, and magnetite. The groundmass augite is pleochroic from pale brown to pale green, has a 2V of 20°, and hence is rather pigeonitic. The augite phenocrysts also have thin pigeonitic outer zones.

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
P49Se651.8938179.636Powers, H. A.1949-05-01 Sugarloaf PeakVery recent flow on the eastern shore (142,200' E., 269,550' N.)P49Se6 is from a very recent flow on the eastern shore (142,200' E., 269,550' N.), which Powers considered younger than the most recent eustatic bench, and which is unmantled by ash. Powers estimated the thickness at more than 20 feet, and notes that there was much copper staining. It is a dense medium-gray rock with conspicuous green augite phenocrysts. It is seriate, with an intergranular texture. The principal constituents are bytownite (An72), augite (Di70He38), and olivine (Fa35) as much as 1 mm in diameter, in part forming clots of small prisms, and magnetite. The groundmass augite is pleochroic from pale brown to pale green, has a 2V of 20°, and hence is rather pigeonitic. The augite phenocrysts also have thin pigeonitic outer zones.P49Se6LavaSugarloaf HeadWhole-rock 51.79 1.02 19.15 9.48 0.2 4.18 9.31 3.36 1.14 0.28 100.01368NN3.346.44H2OP=0.06; H2OM=0.01; CO2=0.01NN 22.5 489 7.6 units are percent 0.95745XRF: Rb, Sr, Ni; NN: K;
P49Se651.8938179.636Powers, H. A.1949-05-01 Sugarloaf PeakVery recent flow on the eastern shore (142,200' E., 269,550' N.)P49Se6 is from a very recent flow on the eastern shore (142,200' E., 269,550' N.), which Powers considered younger than the most recent eustatic bench, and which is unmantled by ash. Powers estimated the thickness at more than 20 feet, and notes that there was much copper staining. It is a dense medium-gray rock with conspicuous green augite phenocrysts. It is seriate, with an intergranular texture. The principal constituents are bytownite (An72), augite (Di70He38), and olivine (Fa35) as much as 1 mm in diameter, in part forming clots of small prisms, and magnetite. The groundmass augite is pleochroic from pale brown to pale green, has a 2V of 20°, and hence is rather pigeonitic. The augite phenocrysts also have thin pigeonitic outer zones.P49Se6LavaSugarloaf HeadWhole-rock H2OP=0.06; H2OM=0.01; CO2=0.01NN 0.36 535 10.3 25.4 3.43 16.3 4.21 1.24 3.57 0.58 3.5 0.79 2.29 0.3 2.14 24.9 97 2.3 2.24 27 1.34 0.62 228 7.1 24.2 207 57.8 0.77 201SS-ID: Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Nb, Hf, Pb, Th, U, Mo; XRF: Y, Zr, V, Cr, Co, Cu, Zn;
P49Se651.8938179.636Powers, H. A.1949-05-01 Sugarloaf PeakVery recent flow on the eastern shore (142,200' E., 269,550' N.)P49Se6 is from a very recent flow on the eastern shore (142,200' E., 269,550' N.), which Powers considered younger than the most recent eustatic bench, and which is unmantled by ash. Powers estimated the thickness at more than 20 feet, and notes that there was much copper staining. It is a dense medium-gray rock with conspicuous green augite phenocrysts. It is seriate, with an intergranular texture. The principal constituents are bytownite (An72), augite (Di70He38), and olivine (Fa35) as much as 1 mm in diameter, in part forming clots of small prisms, and magnetite. The groundmass augite is pleochroic from pale brown to pale green, has a 2V of 20°, and hence is rather pigeonitic. The augite phenocrysts also have thin pigeonitic outer zones.P49Se6LavaSugarloaf HeadWhole-rock H2OP=0.06; H2OM=0.01; CO2=0.01NN units are percent 0.06units are percent 0.03 units are percent 0.01 units are percent 0.002 0.02units are percent 0.0002 0.003units are percent 0.001units are percent 0.02 units are percent 0.002 368SPEC

SAMPLE LOCATION

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