Sample 93

NavDat sample number 11358 · TRACHYTE

Sample

Sample ID	93
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	56.95	WT%	XRF
AL2O3	17.79	WT%	XRF
FE2O3	4.45	WT%	XRF
FEO	0.92	WT%	TIT
CAO	4.79	WT%	XRF
MGO	1.86	WT%	XRF
NA2O	4.26	WT%	XRF
K2O	4.83	WT%	XRF
TIO2	0.79	WT%	XRF
MNO	0.16	WT%	XRF
P2O5	0.18	WT%	XRF
H2O	3.09	WT%	PENFIELD
TOTAL	100.07	WT%	XRF
RB	101	PPM	XRF
SR	1632	PPM	XRF
Y	31	PPM	XRF
ZR	395	PPM	XRF
LA	55	PPM	XRF
CU	27	PPM	AAS
CR	26	PPM	AAS
NI	67	PPM	AAS
ZN	116	PPM	AAS