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SAMPLE INFO : 91CND05
Sample ID:91CND05
Station ID:91CND05
Latitude:58.911106
Longitude:-153.62725
Datum:NAD83
Date Sampled:1991-01-01
Sample Type 1:Lava
Text Description:
Large flow of platy lava overlying sedimentary country-rock. Surface elevation drops before climbing up to Douglas summit, so presumably proximal part of flow has been eroded. Porphyritic two-pyroxene andesite. ~30% phenocrysts of plagioclase (up to 0.9 x 0.6 mm), pyroxene (up to 1.1 x 0.5 mm), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites. Pl:px ~ 1:1. Glomerocrysts of pyroxene and pyroxene plus plagioclase common. Sieve texture prominent in most plagioclase crystals.

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
91CND0558.911106-153.62725Nye, C. J.1991-07-19 DouglasLarge flow of platy lava overlying sedimentary country-rock. Surface elevation drops before climbing up to Douglas summit, so presumably proximal part of flow has been eroded. Porphyritic two-pyroxene andesite. ~30% phenocrysts of plagioclase (up to 0.9 x 0.6 mm), pyroxene (up to 1.1 x 0.5 mm), and opaque Fe-Ti oxides in a matrix of devitrified glass and subordinate microphenocrysts and microlites. Pl:px ~ 1:1. Glomerocrysts of pyroxene and pyroxene plus plagioclase common. Sieve texture prominent in most plagioclase crystals.91CND05LavaWhole-rock 59.1 0.699 16.66 0.124 4.7 7.74 3.38 1.077 0.134 100.3213291XRF6.39 1.12605 28 292 382 2 29 2.92159 12.86259 3.37674 0.98317 3.52502 0.6031 3.77735 0.79317 2.18143 0.32144 2.05229 0.33372 21 104 1.1 2.686 0.11645 5 3 1.19676 27 202 84 27 72 61 18 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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