Sample 81030

NavDat sample number 12707 · TRACHYANDESITE

Sample

Sample ID	81030
Rock name	TRACHYANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	30.9
Longitude	-104.042
Location	Buckhorn Canyon, Davis Mts
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
38		37.2	38.8

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	52.34		WT%	XRF
TIO2	1.45		WT%	XRF
AL2O3	19		WT%	XRF
FE2O3	4.87		WT%	XRF
FEO	2.23		WT%	XRF
MNO	0.12		WT%	XRF
MGO	2.68		WT%	XRF
CAO	6.68		WT%	XRF
NA2O	4.12		WT%	XRF
K2O	2.88		WT%	XRF
P2O5	0.88		WT%	REG-COR
H2O_PLUS	1.51		WT%	XRF
H2O_MINUS	0.72		WT%	XRF
CO2	0.14		WT%	XRF
TOTAL	99.62		WT%	XRF
ZN	87		PPM	PER_COM
BA	1007		PPM	PER_COM

References

Parker, Don F (1986) Stratigraphic, structural, and petrologic development of the Buckhorn Caldera, northern Davis Mountains, Trans-Pecos Texas. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 286-302. 1986. .