Sample XAL-15

NavDat sample number 51536 · RHYOLITE

Sample

Sample ID	XAL-15
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Lava Flow

Location

Latitude	21.3733
Longitude	-104.71
Location	Mexico
State / province	Nayarit

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
4.95		4.93	4.97

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	75.9		WT%	ICPMS
TIO2	0.08		WT%	ICPMS
AL2O3	14.8		WT%	ICPMS
FE2O3T	1.38		WT%	ICPMS
MNO	0.03		WT%	ICPMS
MGO	0.03		WT%	ICPMS
CAO	0.18		WT%	ICPMS
NA2O	3.13		WT%	ICPMS
K2O	4.45		WT%	ICPMS
P2O5	0.01		WT%	ICPMS
TOTAL	100		WT%	ICPMS
LOI	5		WT%	ICPMS
BA	36		PPM	ICPMS
SR	4		PPM	ICPMS
Y	36		PPM	ICPMS
ZR	187		PPM	ICPMS

References

Frey, Holli M; Lange, Rebecca A; Hall, Chris M; Delgado-Granados,Hugo; Carmichael, Ian S E (2007) A Pliocene ignimbrite flare-up along the Tepic-Zacoalco Rift; evidencefor the initial stages of rifting between the Jalisco Block (Mexico)and North America. Geological Society of America Bulletin, vol.119, no.1-2, pp.49-64, Jan2007 doi:10.1130/B25950.1