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SAMPLE INFO : 54-Sn-45
Sample ID:54-Sn-45
Station ID:54-Sn-45
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Dacite
 Text Description:
Albitized dacite porphyry from one-half mile west of Buttress Point and 10 1/2 miles southwest of Kuliliak Bay. It is brownish gray and has chalky plagioclase and ferromagnesian phenocrysts 1 to 2 millimeters long. Phenocrysts compose 1 percent of the rock, consisting of euhedral to subhedral laths and stubby crystals of albite with apatite inclusions and a trace of subhedral magnetite. The groundmass has an in distinct intersertal texture, consisting of abundant subhedral laths of albite and much interstitial altered glass, as well as traces of anhedral clinopyroxene, a granular black opaque mineral, 2nd interstitial quartz that may be primary and that has apatite inclusions. Alteration is intense; albite and kaolin are pervasive and abundant; quartz is common and interstitial; and there are traces of chlorite and uralite (?) altering clinopyroxene.

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-Sn-4553.88707-166.93202Snyder, G. L.1954-01-01 MakushinUnalaska formation from near Buttress Pt.Albitized dacite porphyry from one-half mile west of Buttress Point and 10 1/2 miles southwest of Kuliliak Bay. It is brownish gray and has chalky plagioclase and ferromagnesian phenocrysts 1 to 2 millimeters long. Phenocrysts compose 1 percent of the rock, consisting of euhedral to subhedral laths and stubby crystals of albite with apatite inclusions and a trace of subhedral magnetite. The groundmass has an in distinct intersertal texture, consisting of abundant subhedral laths of albite and much interstitial altered glass, as well as traces of anhedral clinopyroxene, a granular black opaque mineral, 2nd interstitial quartz that may be primary and that has apatite inclusions. Alteration is intense; albite and kaolin are pervasive and abundant; quartz is common and interstitial; and there are traces of chlorite and uralite (?) altering clinopyroxene.54-Sn-45LavaWhole-rock 71.1 0.68 13.7 2.98 0.17 0.82 1.1 6.2 2.2 0.28Total not given in table. 100.48315RAPIDA2.50.79H2OM=0.12; H2OP=0.65; CO2=0.05RAPIDA units are percent 0.1units are percent 0.02 units are percent 0 units are percent 0units are percent 0.02 units are percent 0 units are percent 0 0.004units are percent 0 0units are percent 0units are percent 0.0004 units are percent 0units are percent 0 315NN

SAMPLE LOCATION

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