Sample R-66

NavDat sample number 19276

Sample

Sample ID	R-66
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	55.4		WT%	XRF
TIO2	1.06		WT%	XRF
AL2O3	16.09		WT%	XRF
FE2O3	4.02		WT%	XRF
FEO	3.86		WT%	XRF
MNO	0.13		WT%	XRF
MGO	3.51		WT%	XRF
CAO	6		WT%	XRF
NA2O	3.78		WT%	XRF
K2O	3.58		WT%	XRF
P2O5	0.45		WT%	XRF
LOI	1.68		WT%	XRF
RB	85		PPM	XRF
SR	1139		PPM	XRF
BA	1464		PPM	XRF
Y	20		PPM	XRF
ZR	193		PPM	XRF
V	153		PPM	XRF
NI	15		PPM	XRF
CR	97		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. .