Sample 81019

NavDat sample number 37324 · RHYOLITE

Sample

Latitude	30.2129
Longitude	-103.651
Location	Davis Mountain volcanic field
State / province	Texas

Age (Ma)	Error	Min	Max	Geologic age	Dated by
36.5		32.85	40.15

Item	Value	Unit	Method
SIO2	72.48	WT%	XRF
AL2O3	12.6	WT%	XRF
FEO	3.91	WT%	XRF
MNO	0.09	WT%	XRF
MGO	0.15	WT%	XRF
CAO	0.3	WT%	XRF
NA2O	4.51	WT%	XRF
K2O	5.56	WT%	XRF
P2O5	0.04	WT%	XRF
TOTAL	97.96	WT%	XRF
BA	53	PPM	XRF
ZR	1362	PPM	XRF
NB	121	PPM	XRF
Y	101	PPM	XRF
ND	114.4	PPM	ICPMS
SM	22.3	PPM	ICPMS
PB	15.3	PPM	ICPMS
TH	10.9	PPM	ICPMS
U	3.84	PPM	ICPMS
RB	209	PPM	XRF
SR	32.2	PPM	MS-ID
ND143_ND144	0.512635		TIMS
PB206_PB204	17.861		TIMS
PB207_PB204	15.457		TIMS
PB208_PB204	37.767		TIMS