Sample 91-031

NavDat sample number 57333 · DIORITE

Sample

Sample ID	91-031
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.456
Longitude	-121.639
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		18	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	55.15		WT%	XRF
TIO2	1.34		WT%	XRF
AL2O3	16.48		WT%	XRF
FEO	9.31		WT%	XRF
MNO	0.18		WT%	XRF
MGO	5.28		WT%	XRF
CAO	8.54		WT%	XRF
NA2O	3.1		WT%	XRF
K2O	0.43		WT%	XRF
P2O5	0.2		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.