Sample E-28C

NavDat sample number 19311

Sample

Sample ID	E-28C
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	53.01		WT%	XRF
TIO2	1.43		WT%	XRF
AL2O3	15.56		WT%	XRF
FE2O3	7.85		WT%	XRF
FEO	1.88		WT%	XRF
MNO	0.15		WT%	XRF
MGO	3.74		WT%	XRF
CAO	6.1		WT%	XRF
NA2O	3.78		WT%	XRF
K2O	3.96		WT%	XRF
P2O5	0.52		WT%	XRF
LOI	1.86		WT%	XRF
RB	98		PPM	XRF
SR	1051		PPM	XRF
BA	1713		PPM	XRF
Y	27		PPM	XRF
ZR	280		PPM	XRF
V	179		PPM	XRF
NI	13		PPM	XRF
CR	32		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. .