Sample 90-058

NavDat sample number 57190 · DIORITE

Sample

Sample ID	90-058
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.284
Longitude	-121.818
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	64.6		WT%	XRF
TIO2	0.73		WT%	XRF
AL2O3	17.13		WT%	XRF
FEO	4.69		WT%	XRF
MNO	0.09		WT%	XRF
MGO	2.22		WT%	XRF
CAO	4.8		WT%	XRF
NA2O	4.31		WT%	XRF
K2O	1.22		WT%	XRF
P2O5	0.21		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.