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Sample ID:98JLOK4G
Station ID:98JLOK4
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/ignimbrite. Sample collected from the base of '4G' sequence in lower part of the ignimbrite. No lithics and aphyric.

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
98JLOK453.55638-168.08068Larsen, J. F.1998-01-01 Okmok-100--Outcrop in the sea cliff along the eastern margin of Ashishik point2050 BP Okmok II ash flow/ignimbrite. Sample collected from the base of '4G' sequence in lower part of the ignimbrite. No lithics and aphyric.98JLOK4Gpyroclastic density currentBombHcfe2Whole-rock 55.68384379 1.479703452 15.88073246 10.16144061 0.20661157 3.524550316 7.687165775 3.757494733 1.336898396 0.281558905 98.7364113XRF10.16144061 2.154610759 32.44934933 434.1641766 341.5869647 13.52127975 31.5946636 4.424490759 20.21193955 5.67055287 1.652326302 6.345787358 1.067718482 7.042965613 1.469912659 3.977601235 0.598329628 3.777497289 0.590820703 36.5555037 151 4.735563363 4.3993231 0.345425779 11.34103957 3.107291845 1.526325065 34.36960107 300 23 0 116 95 19 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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