Sample COMP-38

NavDat sample number 51548 · RHYOLITE

Sample

Sample ID	COMP-38
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Lava Flow

Location

Latitude	21.1088
Longitude	-104.816
Location	Mexico
State / province	Nayarit

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
54.6		54	55.2

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	76.6		WT%	ICPMS
TIO2	0.11		WT%	ICPMS
AL2O3	13.8		WT%	ICPMS
FE2O3T	1.47		WT%	ICPMS
MNO	0.01		WT%	ICPMS
MGO	0.35		WT%	ICPMS
CAO	0.27		WT%	ICPMS
NA2O	3.77		WT%	ICPMS
K2O	3.67		WT%	ICPMS
P2O5	0.02		WT%	ICPMS
TOTAL	100		WT%	ICPMS
LOI	2.27		WT%	ICPMS
BA	898		PPM	ICPMS
SR	110		PPM	ICPMS
Y	29		PPM	ICPMS
ZR	155		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