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SAMPLE INFO : 72-ARh-318
Sample ID:72-ARh-318
Station ID:72-ARh-318
Latitude:62.1379
Longitude:-143.4467
Datum:NAD83
Date Sampled:1972-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Text Description:
Basalt and basaltic andesite flows. Extensive sequence of thin to medium flows with oxidized dark-red scoriaceous tops and bottoms in northwestern part of quadrangle. Rocks are gray to dark gray and contain small phenocrysts of olivine and minor hypersthene in a fine-grained intergranular to intersertal matrix of plagioclase and augite. Locally matrix is altered to chlorite and clay minerals. Source probably from volcanic center to northwest in Nabesna B-6 quadrangle.

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-31862.1379-143.4467Richter, D. H.1972-00-00 Nabesna A-5 quadrangle; Wrangell Lava; Wrangell Volcanic Field. lat long points derived from paper map.Basalt and basaltic andesite flows. Extensive sequence of thin to medium flows with oxidized dark-red scoriaceous tops and bottoms in northwestern part of quadrangle. Rocks are gray to dark gray and contain small phenocrysts of olivine and minor hypersthene in a fine-grained intergranular to intersertal matrix of plagioclase and augite. Locally matrix is altered to chlorite and clay minerals. Source probably from volcanic center to northwest in Nabesna B-6 quadrangle.72-ARh-318LavaWhole-rock 54.1 1.4 17.1 8.4 0.13 5.5 7.9 3.8 0.9 0.37 100.654537RAPIDA3.94.9H2O=0.55RAPIDA

SAMPLE LOCATION

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