Sample LC81-809

NavDat sample number 61134 · RHYODACITE

Sample

Sample ID	LC81-809
Rock name	RHYODACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Clynne
Comment	Childs Meadow

Location

Latitude	40.3033
Longitude	-121.421
State / province	California
Volcanic field	Maidu Volcanic Center

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
2.65		0	5.3

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	69.3		WT%	WDXRF
AL2O3	16.03		WT%	WDXRF
FE2O3	0.6		WT%	WDXRF
FEO	2.16		WT%	WDXRF
FEOT	2.7		WT%	WDXRF
MGO	1.31		WT%	WDXRF
CAO	3.01		WT%	WDXRF
NA2O	3.59		WT%	WDXRF
K2O	3.48		WT%	WDXRF
TIO2	0.39		WT%	WDXRF
P2O5	0.09		WT%	WDXRF
MNO	0.04		WT%	WDXRF
LOI	0.86		WT%	LOI
TOTAL	98.8		WT%	WDXRF
MG_NUMBER	51.9			WDXRF
RB	107		PPM	EDXRF
SR	279		PPM	EDXRF
BA	947		PPM	EDXRF
Y	21		PPM	EDXRF
ZR	154		PPM	EDXRF
NB	6		PPM	EDXRF

References

Clynne, M.A., Muffler, L.J.P., Siems, D.F., Taggert Jr., J.E., Bruggman, P. (2008) Major and EDXRF trace element chemical analyses of volcanic rocks from Lassen Volcanic National Park and vicinity, California. Open-File Report - U. S. Geological Survey. 2008. Report # OF. 2008-1091