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SAMPLE INFO : 04CTAV0202
Sample ID:04CTAV0202
Station ID:04CTAV0202
Latitude:59.3626
Longitude:-153.435
Datum:NAD83
Date Sampled:2004-00-00
Sample Type 1:Tephra Fall
Sample Type 2:Pumice
Text Description:
Tephra layer C comprises two units including upper (C2) and lower (C1) fall deposits that possibly represent two phases of the same eruption. The C2 tephra unit is 12-15 cm thick and shows distinct reverse grading with the largest pumice fragments at the top. Mingling of some prehistoric magmas occurred, because one C2 clast consists of white pumice containing bands of much darker volcanic rock. Light gray pumice; near South Point

References:
Petrology and geochemistry of ca. 2100-1000 a.B.P. magmas of Augustine volcano, Alaska, based on analysis of prehistoric pumiceous tephra

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialCoeffSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
04CTAV020259.3626-153.435Tappen, Christine2004-01-01 1000 14C; 4559; Age is approximate. Approximated age from multiple radiocarbon dates, see Waitt and Beget (2009)Augustine850--pumice fall deposit collected from the South Point of the Island. ~270 m to the southeast of 04CTAVO201Tephra layer C comprises two units including upper (C2) and lower (C1) fall deposits that possibly represent two phases of the same eruption. The C2 tephra unit is 12-15 cm thick and shows distinct reverse grading with the largest pumice fragments at the top. Mingling of some prehistoric magmas occurred, because one C2 clast consists of white pumice containing bands of much darker volcanic rock. Light gray pumice; near South Point04CTAV0202Tephra FallCumulateGlass 75.56 0.32 13.01 1.79 0.06 0.45 2.27 4.14 1.97 0.05 99.64520EMP1.79Cl=3380; F=230EMP 4520

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
04CTAV020259.3626-153.435Tappen, Christine2004-01-01 1000 14C; 4559; Age is approximate. Approximated age from multiple radiocarbon dates, see Waitt and Beget (2009)Augustine850--pumice fall deposit collected from the South Point of the Island. ~270 m to the southeast of 04CTAVO201Tephra layer C comprises two units including upper (C2) and lower (C1) fall deposits that possibly represent two phases of the same eruption. The C2 tephra unit is 12-15 cm thick and shows distinct reverse grading with the largest pumice fragments at the top. Mingling of some prehistoric magmas occurred, because one C2 clast consists of white pumice containing bands of much darker volcanic rock. Light gray pumice; near South Point04CTAV0202Tephra FallCumulateWhole-rock 63.26 0.528 16.79 5.01 0.121 2.96 6.37 3.85 0.98 0.121 99.184520XRF5.01 0.40044457 18.48854768 436.2932078 312.0023889 10.03894093 21.46463133 2.885045638 12.04270171 2.947643914 0.905518864 3.00156311 0.526990627 3.359901848 0.732446994 2.088986667 0.321741845 2.069863196 0.349639736 19.35481837 105.943143 2.452743941 3.016187241 0.179565298 3.018654345 2.198293705 0.913186783 15.0412057 120 35 20 19 56 17 4520ICPMS: Cs, Rb, Ba, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Zr, Nb, Hf, Ta, Pb, Th, U, Sc; XRF: V, Cr, Ni, Cu, Zn, Ga;

SAMPLE LOCATION

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