Sample E-38

NavDat sample number 19299

Sample

Sample ID	E-38
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	48.69		WT%	XRF
TIO2	1.68		WT%	XRF
AL2O3	15.89		WT%	XRF
FE2O3	4.18		WT%	XRF
FEO	6.85		WT%	XRF
MNO	0.19		WT%	XRF
MGO	5.7		WT%	XRF
CAO	8.22		WT%	XRF
NA2O	3.05		WT%	XRF
K2O	3.2		WT%	XRF
P2O5	0.71		WT%	XRF
LOI	2.25		WT%	XRF
RB	86		PPM	XRF
SR	1370		PPM	XRF
BA	1341		PPM	XRF
Y	25		PPM	XRF
ZR	194		PPM	XRF
V	223		PPM	XRF
NI	20		PPM	XRF
CR	33		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. .