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SAMPLE INFO : 72-PCL-16
Sample ID:72-PCL-16
Station ID:72-PCL-16
Latitude:62.4033
Longitude:-143.09318
Datum:NAD83
Date Sampled:1972-00-00
Sample Type 1:Lava
Field Lithology:Rhyodacite
Text Description:
Wrangell Lava. Rhyodacite domes and associated flows. Massive, usually gray rocks that weather pinkish gray to tan. Commonly porphyritic, with abundant phenocrysts of plagioclase (as much as 60% of rock), hypersthene, and minor oxyhornblende and altered biotite. Locally devitrified and altered to chlorite and clay minerals. K-Ar date on plagioclase from large dome in northeastern part of quadrangle (sec. 7 , T. 7 N., R. 13 E.) is 3.74 m.y. (M. Lanphere, written commun., 1977)

References:
Geologic map of the Nabesna B-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-PCL-1662.4033-143.09318Lowe, P. C.1972-00-00 Nabesna B-5 Quadrangle; latitude and longitude derived from paper map. Wrangell Lava. Rhyodacite domes and associated flows. Massive, usually gray rocks that weather pinkish gray to tan. Commonly porphyritic, with abundant phenocrysts of plagioclase (as much as 60% of rock), hypersthene, and minor oxyhornblende and altered biotite. Locally devitrified and altered to chlorite and clay minerals. K-Ar date on plagioclase from large dome in northeastern part of quadrangle (sec. 7 , T. 7 N., R. 13 E.) is 3.74 m.y. (M. Lanphere, written commun., 1977)72-PCL-16LavaWhole-rock 68.9 0.46 16.2 3.09 0.06 0.43 3.1 3.7 2.2 0.13 99.94540RAPIDA3.10.28H2OP=0.8; H2OM=0.9; CO2=0.05RAPIDA

SAMPLE LOCATION

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