Sample COMP-25

NavDat sample number 51541 · RHYOLITE

Sample

Sample ID	COMP-25
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Lava Flow

Location

Latitude	21.03
Longitude	-104.746
Location	Mexico
State / province	Nayarit

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25.4		25.2	25.6

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	81.5		WT%	ICPMS
TIO2	0.26		WT%	ICPMS
AL2O3	9.6		WT%	ICPMS
FE2O3T	1.53		WT%	ICPMS
MNO	0.03		WT%	ICPMS
MGO	0.17		WT%	ICPMS
CAO	0.82		WT%	ICPMS
NA2O	2.66		WT%	ICPMS
K2O	3.27		WT%	ICPMS
P2O5	0.12		WT%	ICPMS
TOTAL	100		WT%	ICPMS
LOI	1.78		WT%	ICPMS
BA	1483		PPM	ICPMS
SR	202		PPM	ICPMS
Y	52		PPM	ICPMS
ZR	180		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