Sample B900

NavDat sample number 12118

Sample

Sample ID	B900
Material	METAMORPHIC
Comment	Quartz-mica-pyrite-gold-altered ultramafic(?) rock

Location

Latitude	39.3425
Longitude	-120.801
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
140.9		137.9	143.9

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
SIO2	50.7		WT%	XRF
TIO2	0.21		WT%	XRF
AL2O3	28.6		WT%	XRF
CR2O3	0.78		WT%	XRF
FEO	0.91		WT%	XRF
MGO	2.71		WT%	XRF
NA2O	0.1		WT%	XRF
K2O	11.4		WT%	XRF
F	0.1		WT%	XRF
TOTAL	95.41		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.