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SAMPLE INFO : P49Se4
Sample ID:P49Se4
Station ID:P49Se4
Latitude:51.9288
Longitude:179.5977
Datum:NAD83
Date Sampled:1949-05-01
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Basalt
Text Description:
Olivine basalt that is a porphyritic dense medium-gray (N 5) slightly vesicular rock, with intergranular texture. The phenocrysts consist of plagioclase, which averages about An85 (as determined by the average index of refraction); olivine (Fa32 as determined by the mean index of refraction), about 6 percent of the rock and ranging in length from 0.1 to 1 mm; and sparse augite, ranging from 0.1 to 0.25 mm. The groundmass is chiefly plagioclase, averaging An57; augite granules that are apparently pigeonitic, as shown by a 2V of 35o; magnetite; and intersertal brown glass, charged with minute magnetite granules.

References:
Geologic reconnaissance of Semisopochnoi Island, western 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
P49Se451.9288179.5977Powers, H. A.1949-05-01 Semisopochnoi1 1/4 miles S. 32 1/2 degrees E. of Northeast PointOlivine basalt that is a porphyritic dense medium-gray (N 5) slightly vesicular rock, with intergranular texture. The phenocrysts consist of plagioclase, which averages about An85 (as determined by the average index of refraction); olivine (Fa32 as determined by the mean index of refraction), about 6 percent of the rock and ranging in length from 0.1 to 1 mm; and sparse augite, ranging from 0.1 to 0.25 mm. The groundmass is chiefly plagioclase, averaging An57; augite granules that are apparently pigeonitic, as shown by a 2V of 35o; magnetite; and intersertal brown glass, charged with minute magnetite granules.P49Se4Whole Rock 55.64 1.02 18.61 8.17 0.19 2.8 7.99 3.87 1.02 0.24 99.83368NN2.55.93H2OP=0.32; H2OM=0.11; CO2=0NN 14.1 483 3.7 745XRFB V=0.002, M=SPEC, R=368;Sr V=0.01, M=SPEC, R=368;Ba V=0.08, M=SPEC, R=368;K V=0.85, M=NN, R=745;Zr V=0.01, M=SPEC, R=368;Cu V=0.006, M=SPEC, R=368;Co V=0.002, M=SPEC, R=368;Ga V=0.002, M=SPEC, R=368;V V=0.02, M=SPEC, R=368;Sc V=0.003, M=SPEC, R=368;Co V=17.2, M=XRF, R=201;
P49Se451.9288179.5977Powers, H. A.1949-05-01 Semisopochnoi1 1/4 miles S. 32 1/2 degrees E. of Northeast PointOlivine basalt that is a porphyritic dense medium-gray (N 5) slightly vesicular rock, with intergranular texture. The phenocrysts consist of plagioclase, which averages about An85 (as determined by the average index of refraction); olivine (Fa32 as determined by the mean index of refraction), about 6 percent of the rock and ranging in length from 0.1 to 1 mm; and sparse augite, ranging from 0.1 to 0.25 mm. The groundmass is chiefly plagioclase, averaging An57; augite granules that are apparently pigeonitic, as shown by a 2V of 35o; magnetite; and intersertal brown glass, charged with minute magnetite granules.P49Se4Whole Rock H2OP=0.32; H2OM=0.11; CO2=0NN 25.8 87.9 182 6.8 41.6 72.5 201XRFB V=0.002, M=SPEC, R=368;Sr V=0.01, M=SPEC, R=368;Ba V=0.08, M=SPEC, R=368;K V=0.85, M=NN, R=745;Zr V=0.01, M=SPEC, R=368;Cu V=0.006, M=SPEC, R=368;Co V=0.002, M=SPEC, R=368;Ga V=0.002, M=SPEC, R=368;V V=0.02, M=SPEC, R=368;Sc V=0.003, M=SPEC, R=368;Co V=17.2, M=XRF, R=201;

SAMPLE LOCATION

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