Sample Table 2 Volcanic rock

NavDat sample number 9146 · NOT GIVEN

Sample

Sample ID	Table 2 Volcanic rock
Rock name	NOT GIVEN
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	40.33
Longitude	-106.25
Location	A.O. Porphyry
State / province	COLORADO

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
23.5		18.5	28.5

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	39.6		WT%	EPMA
AL2O3	13.83		WT%	EPMA
TIO2	3.88		WT%	EPMA
FEO	13.15		WT%	EPMA
MGO	11.72		WT%	EPMA
CAO	11.4		WT%	EPMA
NA2O	2.23		WT%	EPMA
K2O	1.35		WT%	EPMA
TOTAL	97.19		WT%	EPMA

References

Karimpour, Mohammad Hassan (1982) Petrology, geochemistry, and genesis of the A.O. porphyry copper complex in Jackson and Grand counties, northwestern Colorado.