Sample PZ?201

NavDat sample number 12292 · DACITE

Sample

Sample ID	PZ?201
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	San Antonio dacite - vit

Location

Latitude	29
Longitude	-104.667
Location	1km N of R. Amapolas
State / province	Chihuahua

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
32		26	38

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	67.09		WT%	XRF
TIO2	0.96		WT%	XRF
AL2O3	15.34		WT%	XRF
FE2O3	0.89		WT%	XRF
FEO	4.45		WT%	XRF
MNO	0.08		WT%	XRF
MGO	0.29		WT%	XRF
CAO	2.25		WT%	XRF
NA2O	3.63		WT%	XRF
K2O	4.72		WT%	XRF
P2O5	0.31		WT%	XRF
LOI	3.2		WT%	XRF
TOTAL	100.74		WT%	XRF
RB	316		PPM	MS-ID
SR	277		PPM	MS-ID
Y	62		PPM	MS-ID
ZR	548		PPM	MS-ID
NB	40		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. .