Sample AB-8.4

NavDat sample number 19329

Sample

Sample ID	AB-8.4
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	51.82		WT%	XRF
TIO2	1.44		WT%	XRF
AL2O3	17.16		WT%	XRF
FE2O3	10.46		WT%	XRF
MNO	0.16		WT%	XRF
MGO	4.24		WT%	XRF
CAO	6.7		WT%	XRF
NA2O	3.87		WT%	XRF
K2O	3.71		WT%	XRF
P2O5	0.8		WT%	XRF
RB	100		PPM	XRF
SR	700		PPM	XRF
BA	1300		PPM	XRF
Y	31		PPM	XRF
CR	5		PPM	XRF
CO	10		PPM	XRF
SC	10		PPM	XRF
HF	6.8		PPM	XRF
TH	10.9		PPM	XRF
TA	1.6		PPM	XRF
U	2.3		PPM	XRF
LA	69.5		PPM	INAA
CE	136		PPM	INAA
NI	55		PPM	INAA
SM	8.55		PPM	INAA
EU	2.8		PPM	INAA
TB	1		PPM	INAA
YB	3.03		PPM	INAA
LU	0.44		PPM	INAA

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. .