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SAMPLE INFO : 98JLOK4B
Sample ID:98JLOK4B
Station ID:98JLOK4
Latitude:53.55638
Longitude:-168.08068
Datum:NAD83
Date Sampled:1998-01-01
Sample Type 1:Tephra Fall
Sample Type 2:Pumice
Final Unit:Hcfe2
Text Description:
2050 BP Okmok II rhyodacit pumice fall deposits. This is the classic outcrop location studied also by T.P. Miller. Crystal-poor rhyodacite pumice samples from basal fall deposits beneath the Okmok II ignimbrite at site 4g

References:
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

GEOCHEM DATA
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 rhyodacit pumice fall deposits. This is the classic outcrop location studied also by T.P. Miller. Crystal-poor rhyodacite pumice samples from basal fall deposits beneath the Okmok II ignimbrite at site 4g98JLOK4BTephra FallCumulateHcfe2Whole-rock 67.73067434 0.609125623 14.74186382 5.316284641 0.158679784 0.573294704 2.866473521 4.668256877 3.163358278 0.171988411 97.6814113XRF5.316284641 5.227623428 77.81003156 880.1528163 215.8767494 25.7042298 57.59845774 7.89940062 33.83855563 8.71298182 1.865025636 9.378613604 1.660810405 10.66429662 2.264069689 6.544264315 1.006876413 6.313765583 1.012454751 59.13308772 310 9.46394675 9.437204971 0.686620297 23.45113944 7.420460061 3.573557011 15.22108761 6 0 2 26 103 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, Ni, Cu, Zn, Ga;

SAMPLE LOCATION

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