Sample 91PS-U69

NavDat sample number 59703 · ANDESITE

Sample

Sample ID	91PS-U69
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.0733
Longitude	-122.588
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
37		33.3	40.7

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	58.37		WT%	XRF
TIO2	1.04		WT%	XRF
AL2O3	17.78		WT%	XRF
FEOT	6.73		WT%	XRF
MNO	0.11		WT%	XRF
MGO	3.83		WT%	XRF
CAO	6.92		WT%	XRF
NA2O	3.9		WT%	XRF
K2O	1.08		WT%	XRF
P2O5	0.25		WT%	XRF
TOTAL	99.7		WT%	XRF
LOI	1.95		WT%	XRF
BA	270		PPM	XRF
LA	-30		PPM	XRF
CE	31		PPM	XRF
RB	17		PPM	XRF
SR	495		PPM	XRF
Y	22		PPM	XRF
ZR	188		PPM	XRF
NB	14		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.