Sample 862

NavDat sample number 66620 · RHYOLITE

Sample

Sample ID	862
Alternate ID	AYB-400
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Rhyolite

Location

Latitude	43.9069
Longitude	-117.709
State / province	Oregon
Volcanic field	Lake Owyhee Volcanic Field
Formation	Littlefield Rhyolite
Elevation	975

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	71.3		WT%	XRF
AL2O3	12.6		WT%	XRF
TIO2	0.42		WT%	XRF
FEOT	4.72		WT%	XRF
MNO	0.15		WT%	XRF
CAO	1.8		WT%	XRF
MGO	0.24		WT%	XRF
K2O	5.28		WT%	XRF
NA2O	3.4		WT%	XRF
P2O5	0.08		WT%	XRF
TOTAL	99.3		WT%	XRF
LOI	3.23		WT%	XRF
CR	25		PPM	ICP
BA	1840		PPM	ICP
RB	138		PPM	ICP
SR	151		PPM	ICP
ZR	544		PPM	ICP
Y	89		PPM	ICP
NB	44		PPM	ICP

References

Brooks-Howard-C (compiler); O-Brien-James-P (compiler) (1992) Geology and mineral resources map of the Westfall Quadrangle, Malheur County, Oregon. Geological Map Series (Portland). 1992.