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SAMPLE INFO : 91CND30
Sample ID:91CND30
Station ID:91CND30
Latitude:58.82
Longitude:-153.636
Datum:NAD83
Date Sampled:1991-01-01
Sample Type 1:Lava
Sample Type 2:Ice Contact
Text Description:
Sample of glaciated ice-contact lava 7 km southwest of Douglas and 6 km north northeast of Fourpeaked along the ridge connecting the two. The outcrop is about 2.5 km long and 1 km wide, from 3600 to 5000 feet in elevation, and surrounded by ice. Lava consists of fanning and contorted, often sub-horizontal columns 10 cm in diameter. Porphyritic two-pyroxene andesite. Phenocrysts of plagioclase (30%, up to 1.6 x 0.9 mm), pyroxene (20%, up to 1.1 x 0.5 mm), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites.

References:
Geochemistry of some Quaternary lavas from the Aleutian Arc and Mt. Wrangell

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
91CND3058.82-153.636Nye, C. J.1991-07-25 DouglasSample of glaciated ice-contact lava 7 km southwest of Douglas and 6 km north northeast of Fourpeaked along the ridge connecting the two. The outcrop is about 2.5 km long and 1 km wide, from 3600 to 5000 feet in elevation, and surrounded by ice. Lava consists of fanning and contorted, often sub-horizontal columns 10 cm in diameter. Porphyritic two-pyroxene andesite. Phenocrysts of plagioclase (30%, up to 1.6 x 0.9 mm), pyroxene (20%, up to 1.1 x 0.5 mm), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites.91CND30LavaWhole-rock 62.18 0.676 16.57 0.106 3.53 6.36 3.64 1.408 0.103 100.8313291XRF5.42 0.92813 40 392 275 10 14 2.87084 12.82519 3.47423 0.90564 3.90788 0.68249 4.36459 0.93132 2.56146 0.39216 2.53015 0.4058 24 130 2 3.69074 0.14945 4 1 1.63864 20 163 41 20 42 59 15 13291ICPMS: Cs, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, U; XRF: Rb, Ba, Sr, La, Ce, Y, Zr, Nb, Pb, Th, Sc, V, Cr, Ni, Cu, Zn, Ga;

SAMPLE LOCATION

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