Sample 4

NavDat sample number 11309 · DACITE

Sample

Sample ID	4
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	68.75	WT%	XRF
AL2O3	15.73	WT%	XRF
FE2O3	2.27	WT%	XRF
FEO	0.52	WT%	TIT
CAO	2.3	WT%	XRF
MGO	0.4	WT%	XRF
NA2O	5.31	WT%	XRF
K2O	3.25	WT%	XRF
TIO2	0.32	WT%	XRF
MNO	0.07	WT%	XRF
P2O5	0.15	WT%	XRF
H2O	0.68	WT%	PENFIELD
TOTAL	99.75	WT%	XRF
RB	91	PPM	XRF
SR	1416	PPM	XRF
Y	26	PPM	XRF
ZR	320	PPM	XRF
LA	30	PPM	XRF
CE	70	PPM	NAA
ND	30	PPM	NAA
SM	6.6	PPM	NAA
EU	2.3	PPM	NAA
TB	1	PPM	NAA
DY	4	PPM	NAA
YB	3	PPM	NAA
LU	0.4	PPM	NAA
U	5.2	PPM	NAA
TH	9	PPM	NAA