Sample 91PS-U56A

NavDat sample number 59710 · ANDESITE

Sample

Sample ID	91PS-U56A
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.0914
Longitude	-122.59
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	60.68		WT%	XRF
TIO2	0.87		WT%	XRF
AL2O3	17.84		WT%	XRF
FEOT	5.51		WT%	XRF
MNO	0.09		WT%	XRF
MGO	3.1		WT%	XRF
CAO	6.36		WT%	XRF
NA2O	4.17		WT%	XRF
K2O	1.16		WT%	XRF
P2O5	0.23		WT%	XRF
TOTAL	99.6		WT%	XRF
LOI	1.74		WT%	XRF
BA	260		PPM	XRF
LA	-30		PPM	XRF
CE	68		PPM	XRF
RB	21		PPM	XRF
SR	425		PPM	XRF
Y	18		PPM	XRF
ZR	205		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.