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SAMPLE INFO : 54-Sn-198
Sample ID:54-Sn-198
Station ID:54-Sn-198
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Countryrock
Text Description:
Granodiorite from the rock bench at the tip of the headland south of the largest stream on the north side of Skan Bay. The texture is hypidiomorphic-granular. The rock contains 70-75 percent felsic minerals: 7-10 percent quartz, 15-18 percent orthoclase partially altered to kaolin (1-3 percent), and 45-50 percent plagioclase preferentially altered in centers to sericite (3-5 percent). The plagioclase composition, by extinction angle, is An40 [mean of 35 crystals, standard deviation is 9 percent An, average amount of zoning per individual plagioclase crystal is 0 percent An per crystal]; by index oils, is An39. Mafic minerals make up 25-30 percent; 5-10 percent clinopyroxene slightly altered to hornblende 10.3-0.5 percent), 3.7 percent hornblende partially altered to antigorite (1-2 percent) and minor magnetite, 10-15 percent biotite slightly altered to penninite (<0.01 percent), 2-3 percent magnetite, <1 percent sphene slightly altered to leucoxene (<0.01 percent), and 0.5-1.5 percent apatite.

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

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedVolcanoLocation DescriptionText DescriptionSample 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-198 53.88707 -166.93202 Snyder, G. L. 1954-01-01 MakushinN arm of Skan Bay, from the rock bench at the tip of the headland south of the largest stream on the north side of Skan Bay.Granodiorite from the rock bench at the tip of the headland south of the largest stream on the north side of Skan Bay. The texture is hypidiomorphic-granular. The rock contains 70-75 percent felsic minerals: 7-10 percent quartz, 15-18 percent orthoclase partially altered to kaolin (1-3 percent), and 45-50 percent plagioclase preferentially altered in centers to sericite (3-5 percent). The plagioclase composition, by extinction angle, is An40 [mean of 35 crystals, standard deviation is 9 percent An, average amount of zoning per individual plagioclase crystal is 0 percent An per crystal]; by index oils, is An39. Mafic minerals make up 25-30 percent; 5-10 percent clinopyroxene slightly altered to hornblende 10.3-0.5 percent), 3.7 percent hornblende partially altered to antigorite (1-2 percent) and minor magnetite, 10-15 percent biotite slightly altered to penninite (<0.01 percent), 2-3 percent magnetite, <1 percent sphene slightly altered to leucoxene (<0.01 percent), and 0.5-1.5 percent apatite.54-Sn-198 57.198309575045 1.152181748315 18.03414910406 5.9919883092226 0.12022766069374 3.0457674042413 6.5023126491862 4.0276266332402 2.6249705918132 0.37070195380569 99.99315NN1.794.37H2OM=0.06; H2OP=0.69; CO2=0NNB V=0.002, M=NN, R=315;Cl V=0.08, M=NN, R=315;F V=0.06, M=NN, R=315;S V=0, M=NN, R=315;Ba V=0.05, M=NN, R=315;Sr V=0.1, M=NN, R=315;Yb V=0.0002, M=NN, R=315;Y V=0.004, M=NN, R=315;Zr V=0.02, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.004, M=NN, R=315;Cu V=0.01, M=NN, R=315;Ga V=0.0015, M=NN, R=315;Mo V=0, M=NN, R=315;Ni V=0.002, M=NN, R=315;Sc V=0.002, M=NN, R=315;V V=0.02, M=NN, R=315;

SAMPLE LOCATION

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