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Sample ID:98JLOK2B
Station ID:98JLOK2
Date Sampled:1998-01-01
Sample Type 1:Pyroclastic Flow
Sample Type 2:Scoria
Final Unit:Hcfe2
Text Description:
2050 BP Okmok II ash flow scoria. Base of andesitic ignimbrite. Aphyric no lithics. Welded top 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. Base of andesitic ignimbrite. Aphyric no lithics. Welded top of small section '2'98JLOK2BPyroclastic FlowBombHcfe2Whole-rock 54.78521762 1.514322204 16.05546433 10.29718827 0.206774919 3.801009548 8.260860751 3.608425064 1.196051004 0.27468629 98.6584113XRF10.29718827 1.942386683 29.19742759 395.1293187 350.0598161 12.10559385 28.42905274 4.147576081 19.10295875 5.227184257 1.581535644 5.784552731 1.023796336 6.387718893 1.366711095 3.824612694 0.565570361 3.463815186 0.555018656 35.0889435 139 4.223935296 3.999582812 0.315305461 10.68625201 2.772249856 1.359911699 37.18594078 361 25 0 156 96 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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