Sample IXT-49

NavDat sample number 51529 · RHYOLITE

Sample

Sample ID	IXT-49
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Lava Dome

Location

Latitude	21.107
Longitude	-104.352
Location	Mexico
State / province	Nayarit

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
4.32		4.31	4.33

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	75.6		WT%	ICPMS
TIO2	0.18		WT%	ICPMS
AL2O3	12.9		WT%	ICPMS
FE2O3T	3.15		WT%	ICPMS
MNO	0.05		WT%	ICPMS
MGO	0.05		WT%	ICPMS
CAO	0.03		WT%	ICPMS
NA2O	3.51		WT%	ICPMS
K2O	4.55		WT%	ICPMS
P2O5	0.02		WT%	ICPMS
TOTAL	100		WT%	ICPMS
LOI	2.21		WT%	ICPMS
BA	22		PPM	ICPMS
SR	3		PPM	ICPMS
Y	129		PPM	ICPMS
ZR	678		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