Sample R-81

NavDat sample number 19290

Sample

Sample ID	R-81
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	38.7775
Longitude	-105.509
Location	Guffey Volcanic Center
State / province	Colorado
Volcanic field	39-Mile Volcanic Field

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
35		33.9	36.1

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	68.52		WT%	XRF
TIO2	0.19		WT%	XRF
AL2O3	16.16		WT%	XRF
FE2O3	1.62		WT%	XRF
FEO	0.27		WT%	XRF
MNO	0.06		WT%	XRF
MGO	0.24		WT%	XRF
CAO	1.25		WT%	XRF
NA2O	4.38		WT%	XRF
K2O	5.39		WT%	XRF
P2O5	0.05		WT%	XRF
LOI	1.28		WT%	XRF
RB	132		PPM	XRF
SR	472		PPM	XRF
BA	1731		PPM	XRF
Y	16		PPM	XRF
ZR	243		PPM	XRF
V	9		PPM	XRF
NI	2		PPM	XRF
CR	3		PPM	XRF

References

Wobus, Reinhard A; Mochel, David W; Mertzman, Stanley A; Eide, Elizabeth A; Rothwarf, Miriam T; Loeffler, Bruce M; Johnson, David A; Keating, Gordon N; Sultze, Kimberly; Benjamin, Anne E; Venzke, Edward A; Filson, Tammy (1990) Geochemistry of high-potassium rocks from the mid-Tertiary Guffey volcanic center, Thirtynine Mile volcanic field, central Colorado; with Suppl. Data 90-15. Geology Boulder. 18; 7, Pages 642-645. 1990. .