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SAMPLE INFO : 54-Sn-197
Sample ID:54-Sn-197
Station ID:54-Sn-197
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Countryrock
Sample Type 2:Plutonic
Text Description:
Granodiorite from north of the 3600 Mountain roof pendant, midway between Skan Ray and Naginak Cove. The texture is hypidiomorphic-granular. Felsic minerals compose 80-85 percent of the rock: 15-20 percent quartz, 10-15 percent orthoclase slightly altered to kaolin (<1 percent), and 50-55 percent plagioclase partially altered to sericite (1-2 percent). The plagioclase composition, by extinction angle, is An39 [mean of 40 crystals, standard deviation is 13 percent An, average amount of zoning per individual plagiclase crystal is 8 percent An per crystal], by index oils, is An40. Mafic minerals compose 15-20 percent: 5-8 percent actinolitic hornblende as long as 10 mm, 8-12 percent biotite up to 7 mm in diameter and partially altered to penninite (1-2 percent) and sphene (<1 percent, itself slightly altered to leucoxene <0.01 percent), 1-2 percent magnetite, and <0.01 percent apatite (in plagioclase) .

References:
Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska

GEOCHEM DATA
StationIDlatitudelongitudeGeologistDateVisitedVolcanoLocationDescriptionTextDescriptionSample IDSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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-19753.88707-166.93202Snyder, G. L.1954-01-01MakushinGranodiorite and related rocks from head of N arm of Skan Bay. North of the 3600 Mountain roof pendant, midway between Skan Ray and Naginak Cove.Granodiorite from north of the 3600 Mountain roof pendant, midway between Skan Ray and Naginak Cove. The texture is hypidiomorphic-granular. Felsic minerals compose 80-85 percent of the rock: 15-20 percent quartz, 10-15 percent orthoclase slightly altered to kaolin (<1 percent), and 50-55 percent plagioclase partially altered to sericite (1-2 percent). The plagioclase composition, by extinction angle, is An39 [mean of 40 crystals, standard deviation is 13 percent An, average amount of zoning per individual plagiclase crystal is 8 percent An per crystal], by index oils, is An40. Mafic minerals compose 15-20 percent: 5-8 percent actinolitic hornblende as long as 10 mm, 8-12 percent biotite up to 7 mm in diameter and partially altered to penninite (1-2 percent) and sphene (<1 percent, itself slightly altered to leucoxene <0.01 percent), 1-2 percent magnetite, and <0.01 percent apatite (in plagioclase) .54-Sn-197 66.601488304186 0.45014523485857 16.115199407937 3.2887970974955 0.070022592089112 1.6305260729322 4.011294203962 3.7512102904881 3.1010005068035 0.21006777626733 100.1315NN1.322.1H2OM=0.05; H2OP=0.56; CO2=0.01NNB V=0, M=NN, R=315;Cl V=0.03, M=NN, R=315;F V=0.05, M=NN, R=315;S V=0, M=NN, R=315;Ba V=0.08, M=NN, R=315;Sr V=0.07, M=NN, R=315;Yb V=0.0001, M=NN, R=315;Y V=0.003, M=NN, R=315;Zr V=0.002, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.0009, M=NN, R=315;Cr V=0.001, M=NN, R=315;Cu V=0.002, M=NN, R=315;Ga V=0.001, M=NN, R=315;Mo V=0, M=NN, R=315;Ni V=0.0006, M=NN, R=315;Sc V=0.0008, M=NN, R=315;V V=0.009, M=NN, R=315;

SAMPLE LOCATION

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