Sample 311

NavDat sample number 12114

Sample

Sample ID	311
Material	METAMORPHIC
Comment	Quartz-dolomite vein with thin mica-rich carbonate-quartz-mariposite rock partings and inclusions;gold and arsenopyrite occur in the quartz-dolomite vein

Location

Latitude	39.4405
Longitude	-120.821
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
115.6		112.6	118.6

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
SIO2	50.6		WT%	XRF
TIO2	0.16		WT%	XRF
AL2O3	27.2		WT%	XRF
CR2O3	0.85		WT%	XRF
FEO	0.67		WT%	XRF
MGO	3.57		WT%	XRF
NA2O	0.05		WT%	XRF
K2O	10.4		WT%	XRF
F	0.2		WT%	XRF
TOTAL	93.7		WT%	XRF

References

Boehlke, J K; Kistler, R W (1986) Rb-Sr, K-Ar, and stable isotope evidence for the ages and sources of fluid components of gold-bearing quartz veins in the northern Sierra Nevada foothills metamorphic belt, California. Economic Geology and the Bulletin of the Society of Economic Geologists. 81; 2, Pages 296-322. 1986.