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Sample ID:98JLOK2A
Station ID:98JLOK2
Date Sampled:1998-01-01
Sample Type 1:pyroclastic density current
Sample Type 2:Scoria
Final Unit:Hcfe2
Text Description:
2050 BP Okmok II ash flow scoria. Sampled juvenile scoria from base of ignimbrite. Aphryic no lithics. Unwelded base of small section '2'

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
98JLOK253.48319-168.08034Larsen, J. F.1998-01-01 Okmok-100--Location is higher up on the flanks near the caldera gates region2050 BP Okmok II ash flow scoria. Sampled juvenile scoria from base of ignimbrite. Aphryic no lithics. Unwelded base of small section '2'98JLOK2Apyroclastic density currentBombHcfe2Whole-rock 55.23509698 1.498933685 16.00487458 10.1614705 0.206154159 3.635625063 7.992281913 3.706712704 1.279577536 0.279272875 98.474113XRF10.1614705 2.051177339 30.01095846 408.4109664 341.7077713 12.9928266 30.81269913 4.319353892 19.53994178 5.467796972 1.58263126 5.998268983 1.033750289 6.773710078 1.442006434 3.917981347 0.558774047 3.605389405 0.557252285 34.32095589 146 4.439869857 4.09232648 0.335500537 8.200512284 2.962358965 1.471112605 34.6090195 333 24 23 100 100 20 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, Ni, Cu, Zn, Ga;


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