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SAMPLE INFO : 91CND28
Sample ID:91CND28
Station ID:91CND28
Latitude:58.925941
Longitude:-153.658
Datum:NAD83
Date Sampled:1991-01-01
Sample Type 1:Lava
Text Description:
Sample from tongue of lava flows 2.4 wide by 4.5 km long, and from seven to twelve kilometers from the summit. These lavas overlie sedimentary country-rock at elevations as high as 1700 feet. Porphyritic two-pyroxene andesite. Phenocrysts of plagioclase (10%, up to 1.5 x 0.5 mm) and pyroxene (10%, stubby prisms up to 0.5 mm in diameter), and glomerocrysts of plagioclase and pyroxene (5%, up to 1 mm in diameter, often with masses of wormy opaques in the center) up to up to 0.4 x 0.2 mm) in a groundmass of devitrified glass and subordinate coarse microphenocrysts and microlites. Most plagioclase crystals have well developed sieve textures either throughout or in broad concentric zones.

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
91CND2858.925941-153.658Nye, C. J.1991-07-25 DouglasSample from tongue of lava flows 2.4 wide by 4.5 km long, and from seven to twelve kilometers from the summit. These lavas overlie sedimentary country-rock at elevations as high as 1700 feet. Porphyritic two-pyroxene andesite. Phenocrysts of plagioclase (10%, up to 1.5 x 0.5 mm) and pyroxene (10%, stubby prisms up to 0.5 mm in diameter), and glomerocrysts of plagioclase and pyroxene (5%, up to 1 mm in diameter, often with masses of wormy opaques in the center) up to up to 0.4 x 0.2 mm) in a groundmass of devitrified glass and subordinate coarse microphenocrysts and microlites. Most plagioclase crystals have well developed sieve textures either throughout or in broad concentric zones.91CND28LavaWhole-rock 57.94 0.703 17.2 0.128 4.88 8.25 3.4 0.966 0.14 100.3713291XRF6.4 0.38735 21 274 398 0 13 2.87956 12.63914 3.28915 0.99184 3.4929 0.59309 3.64858 0.78541 2.15294 0.32696 2.05942 0.32797 20 97 1.1 2.50696 0.1094 4 2 1.10181 28 202 77 23 97 69 17 13291ICPMS: Cs, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, U; XRF: Rb, Ba, Sr, Ce, Y, Zr, Nb, Pb, Th, Sc, V, Cr, Ni, Cu, Zn, Ga;

SAMPLE LOCATION

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