Sample 91PS-U61

NavDat sample number 59700 · ANDESITE

Sample

Sample ID	91PS-U61
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.0756
Longitude	-122.538
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	57.26		WT%	XRF
TIO2	0.98		WT%	XRF
AL2O3	18.44		WT%	XRF
FEOT	6.77		WT%	XRF
MNO	0.1		WT%	XRF
MGO	4.13		WT%	XRF
CAO	7.61		WT%	XRF
NA2O	3.77		WT%	XRF
K2O	0.72		WT%	XRF
P2O5	0.23		WT%	XRF
TOTAL	99.56		WT%	XRF
LOI	1.6		WT%	XRF
BA	200		PPM	XRF
LA	-30		PPM	XRF
CE	31		PPM	XRF
RB	16		PPM	XRF
SR	450		PPM	XRF
Y	20		PPM	XRF
ZR	158		PPM	XRF
NB	18		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.