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SAMPLE INFO : 91CNI21i
Sample ID:91CNI21i
Station ID:91CNI21i
Latitude:59.99421
Longitude:-153.16787
Datum:NAD83
Date Sampled:1991-07-28
Sample Type 1:Lava
Sample Type 2:Enclave/Inclusion
 Text Description:
Basaltic andesite magmatic inclusion. 15% phenocrysts of plagioclase and pyroxene. Groundmass is dominantly crystalline and consists of 30 x 200 micron plagioclase laths, 150 micron pyroxene, opaque oxides, and subordinate clear glass. Irregular voids largely bounded by crystals are abundant. Sparse chromite-bearing olivine crystals up to 1 x 2 mm have highly birefringent reaction halos. One of several diverse lithologies collected from single location consisting of avalanche debris sitting on top of Umbrella Glacier at ~2200 foot elevation. Location implies these all came from Iliamna, central peak. "i" denotes fist-sized rounded blobs of macroscopically different magma enclosed in homogeneous host.

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
91CNI21i59.99421-153.16787Nye, C. J.1991-07-28 IliamnaLatitude and longitude determined using Google Earth.Basaltic andesite magmatic inclusion. 15% phenocrysts of plagioclase and pyroxene. Groundmass is dominantly crystalline and consists of 30 x 200 micron plagioclase laths, 150 micron pyroxene, opaque oxides, and subordinate clear glass. Irregular voids largely bounded by crystals are abundant. Sparse chromite-bearing olivine crystals up to 1 x 2 mm have highly birefringent reaction halos. One of several diverse lithologies collected from single location consisting of avalanche debris sitting on top of Umbrella Glacier at ~2200 foot elevation. Location implies these all came from Iliamna, central peak. "i" denotes fist-sized rounded blobs of macroscopically different magma enclosed in homogeneous host. 91CNI21iLavaWhole-rock 54.31 0.708 18.99 0.152 4.94 9.06 3.7 0.577 0.132 100.5213291XRF7.42 0.38766 6 201 484 4 15 1.87569 8.72332 2.38228 0.9121 2.64849 0.46007 2.94599 0.60599 1.6887 0.25913 1.67904 0.27404 16 70 1.4603 0.0872 3 0 0.41082 17 229 40 21 0 87 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, Pb, Sc, V, Cr, Ni, Zn, Ga;

SAMPLE LOCATION

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