Sample 90-061

NavDat sample number 57183 · DIORITE

Sample

Sample ID	90-061
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2708
Longitude	-121.788
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
20		15	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.17		WT%	XRF
TIO2	0.73		WT%	XRF
AL2O3	16.82		WT%	XRF
FEO	4.83		WT%	XRF
MNO	0.07		WT%	XRF
MGO	2.48		WT%	XRF
CAO	4.84		WT%	XRF
NA2O	4.17		WT%	XRF
K2O	1.71		WT%	XRF
P2O5	0.18		WT%	XRF

References

Swanson, Donald A (1992) Geologic map of the McCoy Peak Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1992.