Sample VR1

NavDat sample number 54431 · VITROPHERE

Sample

Sample ID	VR1
Rock name	VITROPHERE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Virginia Range, Nevada [NW 1/4, NE 1/4, NW 1/4, at exposed contact with granitic basement, north side of hill, Sec 21 T16N, R20E] VR1 is green, hydrated vitric densely welded basal vitrophyre of the lower phase. Has high alkali content (Cs, Rb) indicative of extensive groundwater exchange.

Age (Ma)	Error	Min	Max	Geologic age	Dated by
24.3		22.7	25.9

Item	Value	Unit	Method
SIO2	74.92	WT%	XRF
TIO2	0.16	WT%	XRF
AL2O3	12.82	WT%	XRF
FEO	1.54	WT%	XRF
MNO	0.05	WT%	XRF
MGO	-0.43	WT%	XRF
CAO	1.99	WT%	XRF
NA2O	1	WT%	XRF
K2O	5.9	WT%	XRF
P2O5	-0.08	WT%	XRF
S	-30	PPM	XRF
CL	485	PPM	XRF
ZN	119	PPM	XRF
GA	26	PPM	XRF
RB	1016	PPM	XRF
SR	660	PPM	XRF
Y	54	PPM	XRF
ZR	395	PPM	XRF
NB	32	PPM	XRF
CS	649	PPM	XRF
BA	669	PPM	XRF
PB	45	PPM	XRF
TH	30	PPM	XRF
LA	69	PPM	XRF
CE	119	PPM	XRF
PR	18	PPM	XRF
ND	54	PPM	XRF
SM	-8	PPM	XRF