Sample 91-004

NavDat sample number 57319 · GABBRO

Sample

Sample ID	91-004
Rock name	GABBRO
Rock type	PLUTONIC
Composition	MAFIC
Material	IGNEOUS

Location

Latitude	46.4438
Longitude	-121.7
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
26		19	33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	49.61		WT%	XRF
TIO2	0.91		WT%	XRF
AL2O3	20.93		WT%	XRF
FEO	9.26		WT%	XRF
MNO	0.17		WT%	XRF
MGO	5.1		WT%	XRF
CAO	10.99		WT%	XRF
NA2O	2.54		WT%	XRF
K2O	0.38		WT%	XRF
P2O5	0.12		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.