Sample RH-16

NavDat sample number 34502 · TRACHYTE

Sample

Sample ID	RH-16
Rock name	TRACHYTE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	nepheline normative; alkali feldspar and plagioclase phenocrysts along with clinopyroxene, hornblende, and rare phlogopite; no feldspathoid phenocrysts; groundmass ofsanidine laths, augite, magnetite, sphene, and apatite

Latitude	42.7389
Longitude	-107.33
Location	Rattlesnake Hills
State / province	Wyoming
Volcanic field	Rattlesnake Hills alkalic complex, central alkalic province

Age (Ma)	Error	Min	Max	Geologic age	Dated by
44		32	44

Item	Value	Unit	Method
SIO2	56.1	WT%	XRF
TIO2	0.81	WT%	XRF
AL2O3	16.9	WT%	XRF
FE2O3T	5.61	WT%	XRF
MNO	0.17	WT%	XRF
MGO	1.85	WT%	XRF
CAO	4.7	WT%	XRF
NA2O	5.64	WT%	XRF
K2O	5.03	WT%	XRF
P2O5	0.27	WT%	XRF
LOI	2.62	WT%	XRF
TOTAL	99.7	WT%	XRF
RB	98	PPM	XRF
SR	1370	PPM	XRF
Y	32	PPM	XRF
ZR	280	PPM	XRF
NB	53	PPM	XRF
BA	1000	PPM	XRF
PB	20	PPM	XRF
TH	16	PPM	XRF
U	-10	PPM	XRF
CR	26	PPM	XRF
CO	25	PPM	XRF
NI	-10	PPM	XRF
CU	-10	PPM	XRF
ZN	97	PPM	XRF