Sample 91-081

NavDat sample number 57379 · DIORITE

Sample

Sample ID	91-081
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.412
Longitude	-121.689
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	66.3		WT%	XRF
TIO2	0.61		WT%	XRF
AL2O3	16.42		WT%	XRF
FEO	4.06		WT%	XRF
MNO	0.08		WT%	XRF
MGO	1.21		WT%	XRF
CAO	5.5		WT%	XRF
NA2O	4.21		WT%	XRF
K2O	1.43		WT%	XRF
P2O5	0.18		WT%	XRF

References

Swanson, Donald A (1993) Geologic map of the Blue Lake Quadrangle, southern Cascade Range, Washington. Open-File Report - U. S. Geological Survey. 1993.