Sample 90-022

NavDat sample number 57194 · DIORITE

Sample

Sample ID	90-022
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3112
Longitude	-121.783
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	64.72		WT%	XRF
TIO2	0.74		WT%	XRF
AL2O3	16.52		WT%	XRF
FEO	4.91		WT%	XRF
MNO	0.08		WT%	XRF
MGO	2.43		WT%	XRF
CAO	4.81		WT%	XRF
NA2O	4.47		WT%	XRF
K2O	1.15		WT%	XRF
P2O5	0.17		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.