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SAMPLE INFO : UA771

Sample ID:	UA771
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

A contribution to the Pleistocene geochronology of Alaska and the Yukon Territory: fission-track age of distal tephra units

Stratigraphy, fossils, and age of sediments at the upper pit of the Lost Chicken gold mine: new information on the late Pliocene environment of east central Alaska

GEOCHEM DATA

StationID	Latitude	Longitude	Geologist	DateVisited	Age Info	Volcano	Eruption	Location Description	Text Description	Sample ID	Sample Type 1	Sample Type 2	Final Unit	Material	Coeff	SiO2	TiO2	Al2O3	FeOT	MnO	MgO	CaO	Na2O	K2O	P2O5	Total-majors	REF majors	METH majors	Fe2O3/Fe203T orig	FeO/FeOT orig	Volatiles csv	METH volatiles	Cs	Rb	Ba	Sr	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y	Zr	Nb	Hf	Ta	Pb	Th	U	Sc	V	Cr	Fe	Co	Ni	Cu	Zn	Ga	Mo	As	Na	K	Ref trace1	METH trace1	Rb	Ba	Sr	La	Ce	Nd	Sm	Eu	Gd	Dy	Er	Yb	Lu	Y	Zr	Nb	Pb	Th	U	Sc	Ti	V	Cr	Ni	Cu	Zn	Ga	Ref trace2	METH trace2	Light csv	Halogen csv	other major csv	other lile csv	other ree csv	other hfse csv	other hpe csv	other tm csv	other misc csv
Lost_Chicken	64.05	-141.8833333	Unknown, 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.	UA771	Tephra Fall	Cumulate		Glass		77.09	0.07	13.57	0.8	0.06	0.13	0.75	4.43	3.1			11281	EMP		0.8	H2O=7.31	EMP

SAMPLE LOCATION

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