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SAMPLE INFO : UT86
Sample ID:UT86
Station ID:Lost_Chicken
Latitude:64.05
Longitude:-141.8833333
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Sample collected 17 m below the top of a 25 m section of organic silts. The tephra immediately overlies peat beds that contain pine, spruce, and birch pollen.

References:
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialCoeffSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
Lost_Chicken64.05-141.8833333Unknown, Unknown< 2600000 ± 900000 phenocryst - FT; 1182; Zircon microphenocrysts and glass shards were dated by fission tracks. Zircon crystals contained abundant defects and the glass date of 1.72+/-0.31 Ma is much younger than the zircon. This is the maximum age estimage, obtained from zircon fission tracks. Lost Chicken Mine, at mile 69 of the Taylor Highway, east-central Alaska. Tephra samples collected from gold mine section above the road, on high terrace of Fortymile River, not from mining exposures below the road in the valley. Coordinates provided as degrees/minutes and converted to decimal degrees. Datum not specified, assumed to be NAD83.Sample collected 17 m below the top of a 25 m section of organic silts. The tephra immediately overlies peat beds that contain pine, spruce, and birch pollen. UT86Tephra FallCumulateGlass 1.74 890 14.1 30 2.51 0.49 0.41 1.64 0.29 2.03 0.67 6 2.8 1.8 1792INAA

SAMPLE LOCATION

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