Sample 91PS-U68B

NavDat sample number 59713 · ANDESITE

Sample

Sample ID	91PS-U68B
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.0728
Longitude	-122.584
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	62.15		WT%	XRF
TIO2	0.91		WT%	XRF
AL2O3	17.19		WT%	XRF
FEOT	5.27		WT%	XRF
MNO	0.08		WT%	XRF
MGO	2.71		WT%	XRF
CAO	5.81		WT%	XRF
NA2O	4.25		WT%	XRF
K2O	1.42		WT%	XRF
P2O5	0.21		WT%	XRF
TOTAL	99.86		WT%	XRF
LOI	1.25		WT%	XRF
BA	305		PPM	XRF
LA	36		PPM	XRF
CE	49		PPM	XRF
RB	20		PPM	XRF
SR	445		PPM	XRF
Y	20		PPM	XRF
ZR	230		PPM	XRF
NB	15		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.