Sample 954

NavDat sample number 66212 · RHYOLITE

Sample

Sample ID	954
Alternate ID	AZB-317
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Welded tuff

Location

Latitude	43.6048
Longitude	-117.834
State / province	Oregon
Formation	Dinner Creek Welded Ash-Flow Tuff
Elevation	1146

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
13.8		11.2	16.4	middle Miocene

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	77.3		WT%	XRF
AL2O3	11.7		WT%	XRF
TIO2	0.2		WT%	XRF
FEOT	1.88		WT%	XRF
MNO	0.03		WT%	XRF
CAO	0.29		WT%	XRF
MGO	0.21		WT%	XRF
K2O	3.56		WT%	XRF
NA2O	4.79		WT%	XRF
P2O5	0.04		WT%	XRF
LOI	1.47		WT%	XRF
TOTAL	100.1		WT%	XRF
CR	12		PPM	XRF
BA	1690		PPM	XRF
RB	74		PPM	XRF
SR	23		PPM	XRF
ZR	476		PPM	XRF
Y	92		PPM	XRF
NB	31		PPM	XRF

References

Ferns, Mark L; McConnell, Vicki S; Madin, Ian P; Johnson, Jenda A (2006) Geology of the upper Grande Ronde River basin, Union County, Oregon. Open File Report - State of Oregon, Department of Geology and Mineral Industries. 2006.