Sample 137

NavDat sample number 88027 · RHYODACITE

Sample

Sample ID	137
Rock name	RHYODACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Hildreth and others
Comment	Slabby lava flow

Location

Latitude	48.8191
Longitude	-121.747
Location	Camp Kiser
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.992		0.978	1.006

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.3		WT%	XRF
TIO2	0.45		WT%	XRF
AL2O3	15.7		WT%	XRF
FEOT	2.09		WT%	XRF
MNO	0.06		WT%	XRF
MGO	0.73		WT%	XRF
CAO	0.45		WT%	XRF
NA2O	4.02		WT%	XRF
K2O	3.59		WT%	XRF
P2O5	0.15		WT%	XRF
LOI	2.1		WT%	XRF
TOTAL	97.06		WT%	XRF
RB	64		PPM	XRF
SR	360		PPM	XRF
Y	20		PPM	XRF
ZR	210		PPM	XRF
BA	1500		PPM	XRF
CE	30		PPM	XRF
V	53		PPM	XRF

References

Hildreth, Wes; Lanphere, Marvin A; Champion, Duane E; Fierstein, Judy (2004) Rhyodacites of Kulshan Caldera, north Cascades of Washington;post-caldera lavas that span the Jaramillo. Journal of Volcanology and Geothermal Research, vol.130, no.3-4,pp.227-264, 29 Feb 2004 doi:10.1016/S0377-0273(03)00290-7