Sample 290

NavDat sample number 88028 · RHYODACITE

Sample

Sample ID	290
Rock name	RHYODACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Hildreth and others
Comment	Intrusive-extrusive dome

Location

Latitude	48.818
Longitude	-121.725
Location	Corax Dome
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
1.109		1.09	1.128

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.6		WT%	XRF
TIO2	0.41		WT%	XRF
AL2O3	14.8		WT%	XRF
FEOT	2.27		WT%	XRF
MNO	0.05		WT%	XRF
MGO	0.22		WT%	XRF
CAO	1.99		WT%	XRF
NA2O	4.45		WT%	XRF
K2O	2.64		WT%	XRF
P2O5	0.17		WT%	XRF
LOI	1.46		WT%	XRF
TOTAL	97.56		WT%	XRF
RB	40		PPM	XRF
SR	297		PPM	XRF
Y	16		PPM	XRF
ZR	195		PPM	XRF
BA	1110		PPM	XRF
CE	49		PPM	XRF
V	30		PPM	XRF
ZN	43		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