Sample PZ-117

NavDat sample number 12242 · ANDESITE

Sample

Sample ID	PZ-117
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	andesite - devit

Location

Latitude	28.6668
Longitude	-104.167
Location	2km S of Cerro 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	59.68		WT%	XRF
TIO2	1.85		WT%	XRF
AL2O3	15.66		WT%	XRF
FE2O3	1.34		WT%	XRF
FEO	6.68		WT%	XRF
MGO	2.57		WT%	XRF
CAO	5.2		WT%	XRF
NA2O	3.99		WT%	XRF
K2O	2.48		WT%	XRF
LOI	1.83		WT%	XRF
TOTAL	100.84		WT%	XRF
NI	17		PPM	MS-ID
RB	81		PPM	MS-ID
SR	372		PPM	MS-ID
Y	50		PPM	MS-ID
ZR	386		PPM	MS-ID
NB	29		PPM	MS-ID
PB	14		PPM	MS-ID
TH	9		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. .