Sample TM-71-2

NavDat sample number 12086 · RHYOLITE

Sample

Sample ID	TM-71-2
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	phenos of plag, quartz, alkali feldspar, chloritized bio and horn; strong propylitic alteration; feldspars albitized and partly replaced by zeolite

Location

Latitude	44.8667
Longitude	-115.033
State / province	Idaho
Volcanic field	Challis Volcanics; Thunder Mountain cauldron complex; Lower Sunnyside unit

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
45		45	46

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	71.59		WT%	UNKNOWN
AL2O3	14.57		WT%	UNKNOWN
FE2O3	1.22		WT%	UNKNOWN
FEO	0.76		WT%	UNKNOWN
MGO	0.36		WT%	UNKNOWN
CAO	1.15		WT%	UNKNOWN
NA2O	3.17		WT%	UNKNOWN
K2O	5.01		WT%	UNKNOWN
H2O_PLUS	1.22		WT%	UNKNOWN
H2O_MINUS	0.32		WT%	UNKNOWN
TIO2	0.3		WT%	UNKNOWN
P2O5	0.09		WT%	UNKNOWN
MNO	0.04		WT%	UNKNOWN
CO2	0		WT%	UNKNOWN
TOTAL	99.84		WT%	UNKNOWN
CL	0		WT%	UNKNOWN
F	0.04		WT%	UNKNOWN

References

Ekren, E B (1985) Eocene cauldron-related volcanic events in the Challis Quadrangle. U. S. Geological Survey Bulletin, Report: B 1658 A-S, pp.43-58, 1985