Sample USWG1-1389.4

NavDat sample number 84581 · PYROCLASTIC-FALL

Sample

Sample ID	USWG1-1389.4
Rock name	PYROCLASTIC-FALL
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	36.8649
Longitude	-116.458
State / province	NEVADA

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
12.778		12.78	12.775

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
AL2O3	12.2		WT%	XRF
CAO	0.63		WT%	XRF
FE2O3	1.02		WT%	XRF
K2O	4.81		WT%	XRF
LOI	4.88		WT%	XRF
MGO	0.1		WT%	XRF
MNO	0.0904		WT%	XRF
MN	0.07		WT%	XRF
NA2O	2.64		WT%	XRF
P2O5			WT%	XRF
SIO2	72.6		WT%	XRF
TIO2	0.08		WT%	XRF
TOTAL	99.03		WT%	XRF
UO2	5.7912		PPM	NAA
THO2	31.7235		PPM	GAMMA-RAY COUNTING
UO2	5.6618		PPM	GAMMA-RAY COUNTING

References

Ferguson, John F; Cogbill, Allen H; Warren, Richard G (1994) A geophysical-geological transect of the Silent Canyon caldera complex, Pahute Mesa, Nevada. Journal of Geophysical Research, vol.99, no.B3, pp.4323-4339, 10 Mar 1994 doi:10.1029/93JB02447