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SAMPLE INFO : 72-ARh-310
Sample ID:72-ARh-310
Station ID:72-ARh-310
Latitude:62.0544
Longitude:-143.4761
Datum:NAD83
Date Sampled:1972-00-02
Sample Type 1:Lava
Field Lithology:Dacite
Text Description:
Dacite cinder cone. Chiefly dense glassy scoria and blocks showing bread-crust texture. Rocks are dark gray to black and contain phenocrysts of augite, plagioclase, and minor hypersthene in a glassy matrix. Cone still retains original form. K-Ar date (M.A. Lanphere, written commun., 1974) on plagioclase indicates age of 1.34 +/- 0.20 m.y. (Sample 72-ARh-310)

References:
Geologic map of the Nabesna A-5 quadrangle, 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
72-ARh-31062.0544-143.4761Richter, D. H.1972-00-02 1340000 ± 200000 K-Ar; 4537; plagioclase K-ArJarvisNabesna A-5 quadrangle; Wrangell Lava; Wrangell Volcanic Field. lat long points derived from paper map. Sample from Jarvis.Dacite cinder cone. Chiefly dense glassy scoria and blocks showing bread-crust texture. Rocks are dark gray to black and contain phenocrysts of augite, plagioclase, and minor hypersthene in a glassy matrix. Cone still retains original form. K-Ar date (M.A. Lanphere, written commun., 1974) on plagioclase indicates age of 1.34 +/- 0.20 m.y. (Sample 72-ARh-310)72-ARh-310LavaWhole-rock 63.5 1.2 15.7 5.6 0.09 2 4.1 4.1 2.8 0.34 100.374537RAPIDA1.34.4H2O=0.64RAPIDA

SAMPLE LOCATION

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