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SAMPLE INFO : 54-B-11
Sample ID:54-B-11
Station ID:54-B-11
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Andesite
Text Description:
Andesite porphyry from a dike in the Unalaska formation along the south shore of Kalekta Bay. It is light bluish gray to medium gray and has phenocrysts 1 to 3 millimeters long. Phenocrysts compose 20 percent of the rock: 19 percent sodic labradorite to sodic andesine, which forms embayed crystals and subhedral laths and which is zoned normally; a trace of clinopyroxene, which alters to uralite(?) and chlorite; and a trace of pyrite, which forms subhedra associated with clinopyroxene. The groundmass, which has a felty and intersertal texture, consists of abundant subhedral laths of sodic andesine, and also a trace of subhedral clinopyroxene and a granular black opaque mineral. Alteration is moderate: chlorite and uralite(?) are common, and calcite forms disseminated crystals and veinlets.

References:
Geology of Unalaska Island and adjacent insular shelf, 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
54-B-1153.88707-166.93202Barnett, H. F. J.1954-01-01 MakushinUnalaska formation, dike from Kalekta BayAndesite porphyry from a dike in the Unalaska formation along the south shore of Kalekta Bay. It is light bluish gray to medium gray and has phenocrysts 1 to 3 millimeters long. Phenocrysts compose 20 percent of the rock: 19 percent sodic labradorite to sodic andesine, which forms embayed crystals and subhedral laths and which is zoned normally; a trace of clinopyroxene, which alters to uralite(?) and chlorite; and a trace of pyrite, which forms subhedra associated with clinopyroxene. The groundmass, which has a felty and intersertal texture, consists of abundant subhedral laths of sodic andesine, and also a trace of subhedral clinopyroxene and a granular black opaque mineral. Alteration is moderate: chlorite and uralite(?) are common, and calcite forms disseminated crystals and veinlets.54-B-11LavaWhole-rock 56.4 0.98 18.2 7.1 0.17 2.8 7 4.2 1.2 0.26Total not given in table. 99.91315RAPIDA2.64.8H2OM=0.06; H2OP=1.5; CO2=0.49RAPIDA units are percent 0.08units are percent 0.08 units are percent 0 units are percent 0units are percent 0.01 units are percent 0 units are percent 0.004 0.01units are percent 0 0.001units are percent 0units are percent 0.006 units are percent 0.002units are percent 0 315NN

SAMPLE LOCATION

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