Sample 91PS-U40

NavDat sample number 59705 · ANDESITE

Sample

Sample ID	91PS-U40
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.0575
Longitude	-122.557
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	58.8		WT%	XRF
TIO2	0.95		WT%	XRF
AL2O3	20.04		WT%	XRF
FEOT	5.16		WT%	XRF
MNO	0.09		WT%	XRF
MGO	1.91		WT%	XRF
CAO	7.23		WT%	XRF
NA2O	4.5		WT%	XRF
K2O	1.02		WT%	XRF
P2O5	0.3		WT%	XRF
TOTAL	99.57		WT%	XRF
LOI	1.51		WT%	XRF
BA	235		PPM	XRF
LA	-30		PPM	XRF
CE	50		PPM	XRF
RB	14		PPM	XRF
SR	560		PPM	XRF
Y	22		PPM	XRF
ZR	186		PPM	XRF
NB	17		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.