Sample 58

NavDat sample number 11340 · DACITE

Sample

Sample ID	58
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	61.58	WT%	XRF
AL2O3	17.36	WT%	XRF
FE2O3	4.09	WT%	XRF
FEO	0.43	WT%	TIT
CAO	4.53	WT%	XRF
MGO	1.21	WT%	XRF
NA2O	5.45	WT%	XRF
K2O	3.62	WT%	XRF
TIO2	0.57	WT%	XRF
MNO	0.14	WT%	XRF
P2O5	0.22	WT%	XRF
H2O	0.78	WT%	PENFIELD
TOTAL	99.98	WT%	XRF
RB	88	PPM	XRF
SR	1316	PPM	XRF
Y	29	PPM	XRF
ZR	340	PPM	XRF
LA	59	PPM	XRF
CE	97	PPM	NAA
ND	56	PPM	NAA
SM	9.1	PPM	NAA
EU	2.9	PPM	NAA
TB	1	PPM	NAA
DY	6	PPM	NAA
YB	3	PPM	NAA
LU	0.4	PPM	NAA
LA	59	PPM	NAA
U	3.6	PPM	NAA
TH	11	PPM	NAA