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Sample ID:99JLOK4B
Station ID:99JLOK4
Date Sampled:1999-01-01
Sample Type 1:Tephra Fall
Sample Type 2:Pumice
Final Unit:Hcfe2
Text Description:
2050 BP rhyodacite pumice fall. Crystal-poor rhyodacite pumice samples from basal fall deposits beneath basalic andesite ignimbrite at site 4g

Magmatic differentiation at an island-arc caldera: a stratigraphically constrained multi-isotope study of Okmok Volcano, Aleutian Islands, Alaska
Late Pleistocene and Holocene caldera-forming eruptions of Okmok Caldera, 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
99JLOK453.55656-168.08001Larsen, J. F.1999-01-01 Okmok-100--Ashishik point outcrop. Re-measured stratigraphy2050 BP rhyodacite pumice fall. Crystal-poor rhyodacite pumice samples from basal fall deposits beneath basalic andesite ignimbrite at site 4g99JLOK4BTephra FallCumulateHcfe2Whole-rock 67.74835451 0.610235216 14.75585489 5.367620797 0.160212256 0.663299148 2.877697842 4.449206592 3.194040512 0.173478239 97.9954113XRF5.26 5.15999511 75.54319873 848.6777202 228.6876655 25.33995383 58.07203294 7.96644782 34.45087979 8.877544034 1.883699688 9.237460434 1.640533327 10.63976929 2.295906922 6.358832209 1.009168513 6.384003519 1.033654173 59.35874996 338.3738565 9.198382238 9.441851882 0.694779291 37.32117988 7.44005525 3.500035176 14.91263827 8 1 2 23 104 19 4113ICPMS: 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;


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