AVO Sample Information

Alaska Volcano Observatory

You are here: Home > Samples > Froese_2003_Chester_Bluff_Charley_River_tephra_ave

SAMPLE INFO : Froese_2003_Chester_Bluff_Charley_River_tephra_ave

Sample ID:	Froese_2003_Chester_Bluff_Charley_River_tephra_ave
Station ID:	Froese_2003_Chester_Bluff_tephra_averages
Latitude:	65.33
Longitude:	-142.73997
Datum:	NAD83
Sample Type 1:	Tephra Fall

Text Description:
Charley River tephra consists mostly of fine-grained pumiceous glass with a small amount of blocky, poorly vesicular glass. It is heavily contaminated with detrital minerals, but a few primary grains of feldspar, FeTi oxides, biotite, hornblende, orthopyroxene, and apatite were identified. The composition reported here is the average of four samples from the Chester Bluff area: UT1667, UT1677, UT1683, and UT1745.

References:

Recurring middle Pleistocene outburst floods in 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
Froese_2003_Chester_Bluff_tephra_averages	65.33	-142.73997	Froese, D. G.	1999-01-01	> 560000 ± 80000 glass - FT; 10291; Weighted mean of two diameter-corrected fission-track ages obtained on sample of the GI tephra (UT802). The Charley River tephra occurs stratigraphically below the GI tephra and is therefore older.			Exposures at Chester Bluff on the north side of the Yukon River opposite the mouth of the Charley River, Alaska. Location imprecisely georeferenced from Figure 2 of Froese et al. (2003). Glass compositions are averages calculated from analyses of multiple tephra samples from the same tephra beds in the area. Individual sample IDs (analyses of which contribute to the average tephra bed composition) are noted in the sample descriptions.	Charley River tephra consists mostly of fine-grained pumiceous glass with a small amount of blocky, poorly vesicular glass. It is heavily contaminated with detrital minerals, but a few primary grains of feldspar, FeTi oxides, biotite, hornblende, orthopyroxene, and apatite were identified. The composition reported here is the average of four samples from the Chester Bluff area: UT1667, UT1677, UT1683, and UT1745.	Froese_2003_Chester_Bluff_Charley_River_tephra_ave	Tephra Fall	Cumulate		Glass		72.58	0.23	15.75	1.71	0.08	0.56	2.04	4.54	2.44			10291	EMP		1.71	Cl=0.07; H2O=5.67	EMP

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA

URL: www.avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

@alaska_avo

alaska.avo

Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.