Sample 93-TO-A2

NavDat sample number 59989 · ANDESITE

Sample

Sample ID	93-TO-A2
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.2747
Longitude	-122.518
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
36		32.4	39.6

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	57.98		WT%	XRF
TIO2	1.29		WT%	XRF
AL2O3	17.32		WT%	XRF
FEOT	7.57		WT%	XRF
MNO	0.13		WT%	XRF
MGO	3.48		WT%	XRF
CAO	6.67		WT%	XRF
NA2O	3.8		WT%	XRF
K2O	1.4		WT%	XRF
P2O5	0.35		WT%	XRF
TOTAL	99.66		WT%	XRF
LOI	0.69		WT%	XRF
BA	285		PPM	XRF
LA	-30		PPM	XRF
CE	34		PPM	XRF
RB	32		PPM	XRF
SR	440		PPM	XRF
Y	29		PPM	XRF
ZR	230		PPM	XRF
NB	13		PPM	XRF

References

du, Bray Edward A; John, David A; Sherrod, David R; Evarts, Russell C; Conrey, Richard M; Lexa, Jaroslav (2006) Geochemical database for volcanic rocks of the western Cascades, Washington, Oregon, and California. U. S. Geological Survey Data Series. 2006.