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SAMPLE INFO : 53-Sn-46
Sample ID:53-Sn-46
Station ID:53-Sn-46
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1953-01-01
Sample Type 1:Countryrock
Sample Type 2:Plutonic
Text Description:
Granodiorite from 1 mile northeast of the head of Raven Bay. The texture is hypidiomorphic-granular. Felsic minerals compose 75-80 percent of the rock: 10-15 percent quartz, 10-15 percent orthoclase partly altered to kaolin (
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
53-Sn-4653.88707-166.93202Snyder, G. L.1953-01-01 MakushinGranodiorite and related rocks from 1 mi N of Raven BayGranodiorite from 1 mile northeast of the head of Raven Bay. The texture is hypidiomorphic-granular. Felsic minerals compose 75-80 percent of the rock: 10-15 percent quartz, 10-15 percent orthoclase partly altered to kaolin (<l percent), and 50-55 percent plagioclase partly altered to sericite (<1 percent). The plagioclase composition, by extinction angle, is An34 [mean of 21 crystals, standard deviation is 3 percent An, average amount of zoning per individual plagioclase crystal is 3 percent An per crystal], by index oils, is An38. Mafic minerals compose 20-25 percent: 4-6 percent clinopyroxene partly altered to hematite (<0.01 percent) and hornblende (3-4 percent, occurs as reaction zones between pyroxene and biotite; pyroxene adjacent to feldspar and quartz is not altered to hornblende), 13-17 percent biotite slightly altered to hematite (<0.01 percent), 13 percent magnetite-ilmenite, <1 percent sphene (this includes <0.1 percent sphene which occurs as reaction rims around some magnetite-ilmenite in biotite), and 0.5-1.5 percent apatite. Parallel oriented euhedral inclusions of pyroxene, biotite, magnetite, and apatite occur in some of the larger plagioclase crystals.53-Sn-46CountryrockEnclave/InclusionWhole-rock 60.6 0.96 17 5 0.14 3 5.6 4.2 2.4 0.28Total not given in table. 99.85315RAPIDA1.53.7H2OM=0.03; H2OP=0.52; CO2=0.05; Cl=0.1; F=0.02RAPIDA

SAMPLE LOCATION

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