Sample 271

NavDat sample number 17745 · RHYOLITE

Sample

Sample ID	271
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Maximum and minimum ages given are approximations based on average error of previous K-Ar dating.

Location

Latitude	33.6906
Longitude	-107.946
Location	Caballo Blanco
State / province	New Mexico

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
29.8		28.8	30.8

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	72.2		WT%	EDXRF
TIO2	0.21		WT%	EDXRF
AL2O3	15		WT%	EDXRF
FEO	1.12		WT%	EDXRF
MGO	1.5		WT%	EDXRF
CAO	1.24		WT%	EDXRF
NA2O	1.59		WT%	EDXRF
K2O	5.95		WT%	EDXRF
TOTAL	98.81		WT%	EDXRF
BA	743		PPM	EDXRF
CR	6		PPM	EDXRF
NI	-4		PPM	EDXRF
RB	193		PPM	EDXRF
SR	353		PPM	EDXRF
V	28		PPM	EDXRF
Y	29		PPM	EDXRF
ZN	22		PPM	EDXRF
ZR	190		PPM	EDXRF

References

Bornhorst, Theodore Joseph (1980) Major- and trace-element geochemistry and mineralogy of upper Eocene to Quaternary volcanic rocks of the Mogollon-Datil volcanic field, southwestern New Mexico.