Sample R-56

NavDat sample number 19270

Sample

Sample ID	R-56
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	48.01		WT%	XRF
TIO2	1.43		WT%	XRF
AL2O3	15.26		WT%	XRF
FE2O3	4.52		WT%	XRF
FEO	5.88		WT%	XRF
MNO	0.17		WT%	XRF
MGO	6		WT%	XRF
CAO	8.44		WT%	XRF
NA2O	2.67		WT%	XRF
K2O	2.81		WT%	XRF
P2O5	0.54		WT%	XRF
LOI	3.49		WT%	XRF
RB	76		PPM	XRF
SR	1234		PPM	XRF
BA	1181		PPM	XRF
Y	19		PPM	XRF
ZR	134		PPM	XRF
V	241		PPM	XRF
NI	35		PPM	XRF
CR	90		PPM	XRF
CO	39		PPM	XRF
HF	4.4		PPM	XRF
TH	7		PPM	XRF
TA	1.7		PPM	XRF
U	1.6		PPM	XRF
LA	52.4		PPM	INAA
SM	8.39		PPM	INAA
EU	2.78		PPM	INAA
TB	0.9		PPM	INAA
YB	2.43		PPM	INAA
LU	0.36		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. .