Sample 81-30

NavDat sample number 12684 · RHYOLITE

Sample

Sample ID	81-30
Rock name	RHYOLITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	29.475
Longitude	-103.5
Location	Texan Mountain, Sierra Blanca area
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
45		38	48

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	69.33		WT%	PER_COM
TIO2	0.18		WT%	PER_COM
AL2O3	13.39		WT%	PER_COM
FE2O3	3.06		WT%	XRF
MNO	0.11		WT%	XRF
MGO	0.02		WT%	XRF
CAO	1.74		WT%	XRF
NA2O	5.3		WT%	XRF
K2O	4.33		WT%	XRF
H2O_PLUS	0.37		WT%	XRF
CO2	0.95		WT%	XRF
TOTAL	99.69		WT%	XRF

References

Matthews-William-K III; Adams, John A S (1986) Geochemistry, age, and structure of the Sierra Blanca and Finlay Mountain intrusions, Hudspeth County, Texas. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 207-224. 1986. .