Sample 59

NavDat sample number 11341 · DACITE

Sample

Sample ID	59
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	seriate, porphyritic; fine grained to microcrystalline holocrystalline matrix of plagioclase, quartz, Na sanidine; vesicles common, with flow foliation; phenocrysts of plagioclase, amphibole, and minor alkali feldspar, magnetite, and biotite

Age (Ma)	Error	Min	Max	Geologic age	Dated by
43.6		41.4	46.6

Item	Value	Unit	Method
SIO2	63.48	WT%	XRF
AL2O3	17.37	WT%	XRF
FE2O3	3.63	WT%	XRF
FEO	0.72	WT%	TIT
CAO	3.8	WT%	XRF
MGO	0.95	WT%	XRF
NA2O	5.44	WT%	XRF
K2O	3.62	WT%	XRF
TIO2	0.56	WT%	XRF
MNO	0.1	WT%	XRF
P2O5	0.23	WT%	XRF
H2O	0.6	WT%	PENFIELD
TOTAL	100.5	WT%	XRF
RB	88	PPM	XRF
SR	1383	PPM	XRF
Y	29	PPM	XRF
ZR	347	PPM	XRF
LA	46	PPM	XRF
U	4.1	PPM	NAA
TH	13	PPM	NAA