Sample LC93-1877

NavDat sample number 61463 · ANDESITE

Sample

Sample ID	LC93-1877
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Clynne
Comment	Mineral

Location

Latitude	40.3267
Longitude	-121.564
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	58		WT%	WDXRF
AL2O3	18.08		WT%	WDXRF
FE2O3	1.27		WT%	WDXRF
FEO	4.59		WT%	WDXRF
FEOT	5.73		WT%	WDXRF
MGO	4.5		WT%	WDXRF
CAO	7.73		WT%	WDXRF
NA2O	3.35		WT%	WDXRF
K2O	1.49		WT%	WDXRF
TIO2	0.69		WT%	WDXRF
P2O5	0.18		WT%	WDXRF
MNO	0.11		WT%	WDXRF
LOI	0.81		WT%	LOI
TOTAL	98.95		WT%	WDXRF
MG_NUMBER	63.6			WDXRF
RB	33		PPM	EDXRF
SR	526		PPM	EDXRF
Y	20		PPM	EDXRF
ZR	98		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