Sample 108

NavDat sample number 11372 · TRACHYTE

Sample

Sample ID	108
Rock name	TRACHYTE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	porphyritic; phenocrysts form flow foliation; holocrystalline matrix of anorthoclase-Na sanidine, clinopyroxene, and magnetite; phenocrysts are feldspar, amphibole, pyroxene, magnetite-ulvospinel, and minor biotite

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

Item	Value	Unit	Method
SIO2	54.05	WT%	XRF
AL2O3	15.39	WT%	XRF
FE2O3	5.53	WT%	XRF
FEO	2.02	WT%	TIT
CAO	6.54	WT%	XRF
MGO	3.5	WT%	XRF
NA2O	3.56	WT%	XRF
K2O	5.32	WT%	XRF
TIO2	1.01	WT%	XRF
MNO	0.17	WT%	XRF
P2O5	0.52	WT%	XRF
H2O	1.95	WT%	PENFIELD
TOTAL	99.56	WT%	XRF
RB	94	PPM	XRF
SR	887	PPM	XRF
Y	27	PPM	XRF
ZR	246	PPM	XRF
LA	50	PPM	XRF
CE	122	PPM	NAA
ND	79	PPM	NAA
SM	12	PPM	NAA
EU	4.1	PPM	NAA
TB	1	PPM	NAA
DY	8	PPM	NAA
YB	2	PPM	NAA
LU	0.4	PPM	NAA
LA	60	PPM	NAA
U	3.4	PPM	NAA
TH	13	PPM	NAA