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Sample ID:98JLOK3A
Station ID:98JLOK3A
Date Sampled:1998-01-01
Sample Type 1:Pyroclastic Flow
Sample Type 2:Scoria
Text Description:
2050 BP andesite ash flow scoria. Above sample 2b. Aphyric, with lithic fragments

Magmatic differentiation at an island-arc caldera: a stratigraphically constrained multi-isotope study of Okmok Volcano, Aleutian Islands, Alaska

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
98JLOK3A53.4843-168.07936Larsen, J. F.1998-01-01 Okmok-100--2050 BP andesite ash flow scoria. Andesite. Top of andesitic ignimbrite, and continuation of section 2 from downstream about 0.25 to 0.5 miles. Dark scoria that contains small lithics embedded in its matrix glass. Again, aphyric. Looks alot like JLOK1b.2050 BP andesite ash flow scoria. Above sample 2b. Aphyric, with lithic fragments98JLOK3APyroclastic FlowBombWhole-rock 55.87737007 1.45678837 15.97800615 10.03012995 0.203909793 3.51008897 7.59842959 3.70283952 1.359398618 0.283038966 98.5734113XRF10.03012995 2.171643485 32.2823434 437.6173136 345.458477 13.52651707 32.15859316 4.526939205 20.11149162 5.665369648 1.641832914 6.261338739 1.073311124 7.021238909 1.469234212 4.078048186 0.585709046 3.721975651 0.579777736 36.00664609 154 4.813260989 4.333341465 0.351208072 11.15056827 3.186574849 1.508648004 33.02267173 284 23 0 116 97 21 4113ICPMS: Cs, Rb, Ba, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Nb, Hf, Ta, Pb, Th, U, Sc; XRF: Zr, V, Cr, Cu, Zn, Ga;


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