Sample PZ?210

NavDat sample number 12283 · RHYOLITE

Sample

Sample ID	PZ?210
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Cerro rhyolite- vit

Location

Latitude	28.4166
Longitude	-104.667
Location	W face of Cero Escobillas
State / province	Chihuahua

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
29.5		26	38

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.73		WT%	XRF
TIO2	0.43		WT%	XRF
AL2O3	13.9		WT%	XRF
FE2O3	0.39		WT%	XRF
FEO	1.97		WT%	XRF
MNO	0.04		WT%	XRF
MGO	0.48		WT%	XRF
CAO	1.62		WT%	XRF
NA2O	3.8		WT%	XRF
K2O	4.53		WT%	XRF
P2O5	0.09		WT%	XRF
LOI	3.25		WT%	XRF
TOTAL	100.2		WT%	XRF
RB	272		PPM	MS-ID
SR	148		PPM	MS-ID
Y	51		PPM	MS-ID
ZR	280		PPM	MS-ID
NB	32		PPM	MS-ID

References

Cameron, Kenneth L; Cameron, Maryellen (1986) Geochemistry of quartz-normative igneous rocks from the Chinati Mountains and Terlingua areas, West Texas; a comparison with Cenozoic volcanic rocks from Chihuahua and Baja California Sur, Mexico. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 143-163. 1986. .