Sample 797-21A

NavDat sample number 13863

Sample

Sample ID	797-21A
Rock type	PLUTONIC
Material	IGNEOUS

Location

Latitude	45.72
Longitude	-114.277
State / province	Montana
Volcanic field	Challis epizonal plutonics and volcanics

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
50		45	55

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
RB	325.8		PPM	XRF
SR	14.46		PPM	XRF
SR87_SR86	0.75402			TIMS
D18O	7.8		PERMILL	MS
DELTA_D	-140			MS

References

Criss, Robert E; Fleck, Robert J (1987) Petrogenesis, geochronology, and hydrothermal systems of the northern Idaho Batholith and adjacent areas based on (super 18?O/ (super 16?O, D/H, (super 87?Sr/ (super 86?Sr, K-Ar, and (super 40?Ar/ (super 39?Ar studies. U. S. Geological Survey Professional Paper, Report: P 1436, pp.95-137, 1987