Sample 98

NavDat sample number 11363 · TRACHYTE

Sample

Sample ID	98
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	55.28	WT%	XRF
AL2O3	16.02	WT%	XRF
FE2O3	5.59	WT%	XRF
FEO	0.98	WT%	TIT
CAO	6.43	WT%	XRF
MGO	2.45	WT%	XRF
NA2O	3.82	WT%	XRF
K2O	4.74	WT%	XRF
TIO2	0.86	WT%	XRF
MNO	0.13	WT%	XRF
P2O5	0.39	WT%	XRF
H2O	2.13	WT%	PENFIELD
CO2	1.74	WT%	GRAV
TOTAL	100.48	WT%	XRF
RB	86	PPM	XRF
SR	1299	PPM	XRF
Y	27	PPM	XRF
ZR	292	PPM	XRF
LA	53	PPM	XRF
CU	39	PPM	AAS
CR	45	PPM	AAS
NI	86	PPM	AAS
ZN	103	PPM	AAS