Sample M266

NavDat sample number 55246 · DACITE

Sample

Sample ID	M266
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	28.2
Longitude	-104.5
Location	La Perla
State / province	Chihuahua
Country	MEXICO
Location comment	E Chihuahua

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
31		27.9	34.1

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	68.1		WT%	XRF
AL2O3	15.5		WT%	XRF
FE2O3	0.48		WT%	XRF
FEO	1.73		WT%	XRF
MGO	0.33		WT%	XRF
CAO	4.47		WT%	XRF
NA2O	4.27		WT%	XRF
K2O	4.43		WT%	XRF
TIO2	0.57		WT%	XRF
P2O5	0.05		WT%	XRF
MNO	0.06		WT%	XRF
CE	111		PPM	UNKNOWN
ND	43.8		PPM	UNKNOWN
SM	7.94		PPM	UNKNOWN
EU	1.46		PPM	UNKNOWN
YB	4		PPM	UNKNOWN
RB	401		PPM	XRF
SR	224		PPM	XRF
Y	35		PPM	XRF

References

Cameron, Kenneth L; Cameron, M (1985) Rare earth element, 87Sr/86Sr, and 143Nd/144Nd compositions of Cenozoic orogenic dacites from Baja California, northwestern Mexico, and adjacent West Texas; evidence for the predominance of a subcrustal component. Contributions to Mineralogy and Petrology, vol.91, no.1, pp.1-11, 1985 doi:10.1007/BF00429422