Sample PZ-37

NavDat sample number 12245 · ANDESITE

Sample

Sample ID	PZ-37
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	andesite - devit

Location

Latitude	28.6668
Longitude	-104.167
Location	summit of Aguja 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	62.73		WT%	XRF
TIO2	1.52		WT%	XRF
AL2O3	15.06		WT%	XRF
FE2O3	1.11		WT%	XRF
FEO	5.56		WT%	XRF
MGO	1.7		WT%	XRF
CAO	3.91		WT%	XRF
NA2O	3.93		WT%	XRF
K2O	3.98		WT%	XRF
LOI	1.52		WT%	XRF
NI	10		PPM	MS-ID
RB	126		PPM	MS-ID
SR	329		PPM	MS-ID
Y	57		PPM	MS-ID
ZR	384		PPM	MS-ID
NB	32		PPM	MS-ID
PB	21		PPM	MS-ID
TH	12.7		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. .