Sample AB-8.3

NavDat sample number 19336

Sample

Sample ID	AB-8.3
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	61.66		WT%	XRF
TIO2	0.95		WT%	XRF
AL2O3	17.17		WT%	XRF
FE2O3	6.32		WT%	XRF
MNO	0.03		WT%	XRF
MGO	1.71		WT%	XRF
CAO	3.53		WT%	XRF
NA2O	4.01		WT%	XRF
K2O	4.4		WT%	XRF
P2O5	0.61		WT%	XRF
RB	104		PPM	XRF
SR	722		PPM	XRF
BA	1500		PPM	XRF
Y	31		PPM	XRF
CR	19		PPM	XRF
CO	30		PPM	XRF
SC	20		PPM	XRF
HF	5.7		PPM	XRF
TH	8.8		PPM	XRF
TA	1.7		PPM	XRF
U	2.1		PPM	XRF
LA	63.3		PPM	INAA
CE	115		PPM	INAA
NI	51		PPM	INAA
SM	9.6		PPM	INAA
EU	2.98		PPM	INAA
TB	1		PPM	INAA
YB	2.89		PPM	INAA
LU	0.42		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. .