Sample FG-2

NavDat sample number 31269 · DACITE

Sample

Sample ID	FG-2
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Porphyritic/glomeroporphyritic dacite with phenocrysts of plagioclase, hypersthene, lesser augite and minor Fe-Ti oxides. The groundamss is cryptocrystalline and composed of plagioclase, pyroxenes, Fe-Ti osides and devitrified glass. The smaple contains only a few grains of sieve-textured plagioclase, which have no clear core and thin or no claer overgrowth rims.

Age (Ma)	Error	Min	Max	Geologic age	Dated by
45.6		37.4	53.8

Item	Value	Unit	Method
SIO2	64.85	WT%	XRF
TIO2	1.02	WT%	XRF
AL2O3	15.85	WT%	SRC AND AAS
FEO	5.44	WT%	XRF
MNO	0.1	WT%	XRF
MGO	1.63	WT%	SRC AND AAS
CAO	4.58	WT%	XRF
NA2O	3.85	WT%	SRC AND AAS
K2O	2.32	WT%	XRF
P2O5	0.21	WT%	XRF
TOTAL	99.85	WT%	XRF
RB	88	PPM	XRF
SR	272	PPM	XRF
Y	31	PPM	XRF
ZR	262	PPM	XRF
BA	587	PPM	XRF
V	98	PPM	XRF
CR	62	PPM	XRF
NI	25	PPM	XRF
SR87_SR86	0.704163		ICPMS