Sample TPC324

NavDat sample number 12704 · RHYOLITE

Sample

Sample ID	TPC324
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	29.25
Longitude	-103.3
Location	upper unit, top of Emory Peak
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
31		26	38

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	76.65		WT%	XRF
TIO2	0.15		WT%	XRF
AL2O3	11.95		WT%	XRF
FE2O3	1.72		WT%	XRF
FEO	0.72		WT%	XRF
MNO	0.01		WT%	XRF
MGO	0.01		WT%	XRF
CAO	0.14		WT%	XRF
NA2O	4.16		WT%	XRF
K2O	4.58		WT%	XRF
P2O5	0.01		WT%	XRF
H2O_PLUS	0.08		WT%	XRF
H2O_MINUS	0.17		WT%	XRF
TOTAL	100.35		WT%	XRF
ZN	129		PPM	XRF
RB	319		PPM	XRF
SR	14		PPM	XRF
Y	73		PPM	XRF
ZR	712		PPM	XRF
NB	108		PPM	XRF

References

Barker, Daniel S; Henry, Christopher D; McDowell, Fred W (1986) Pine Canyon Caldera, Big Bend National Park; a mildly peralkaline magmatic system. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 266-285. 1986.