Sample 92PS-U271

NavDat sample number 59856 · DACITE

Sample

Sample ID	92PS-U271
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	46.1856
Longitude	-122.573
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	69.74		WT%	XRF
TIO2	0.61		WT%	XRF
AL2O3	15.18		WT%	XRF
FEOT	3.5		WT%	XRF
MNO	0.07		WT%	XRF
MGO	0.74		WT%	XRF
CAO	2.13		WT%	XRF
NA2O	5.5		WT%	XRF
K2O	2.37		WT%	XRF
P2O5	0.16		WT%	XRF
TOTAL	98.97		WT%	XRF
LOI	1.09		WT%	XRF
BA	425		PPM	XRF
LA	36		PPM	XRF
CE	84		PPM	XRF
RB	42		PPM	XRF
SR	194		PPM	XRF
Y	46		PPM	XRF
ZR	450		PPM	XRF
NB	28		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.