Sample 93-ER-A172

NavDat sample number 60025 · ANDESITE

Sample

Sample ID	93-ER-A172
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	46.3142
Longitude	-122.405
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
34		30.6	37.4

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.34		WT%	XRF
TIO2	1.05		WT%	XRF
AL2O3	16.27		WT%	XRF
FEOT	6.67		WT%	XRF
MNO	0.11		WT%	XRF
MGO	4.59		WT%	XRF
CAO	6.94		WT%	XRF
NA2O	3.28		WT%	XRF
K2O	1.5		WT%	XRF
P2O5	0.24		WT%	XRF
TOTAL	99.86		WT%	XRF
LOI	1.4		WT%	XRF
BA	240		PPM	XRF
LA	-30		PPM	XRF
CE	50		PPM	XRF
RB	21		PPM	XRF
SR	460		PPM	XRF
Y	28		PPM	XRF
ZR	205		PPM	XRF
NB	13		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.