Sample RH-15

NavDat sample number 34501 · TRACHYTE

Sample

Sample ID	RH-15
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	54.2	WT%	XRF
TIO2	0.85	WT%	XRF
AL2O3	16.3	WT%	XRF
FE2O3T	6.4	WT%	XRF
MNO	0.18	WT%	XRF
MGO	2.63	WT%	XRF
CAO	5.77	WT%	XRF
NA2O	4.96	WT%	XRF
K2O	4.82	WT%	XRF
P2O5	0.31	WT%	XRF
LOI	2.39	WT%	XRF
TOTAL	98.81	WT%	XRF
RB	109	PPM	XRF
SR	1740	PPM	XRF
Y	48	PPM	XRF
ZR	220	PPM	XRF
NB	28	PPM	XRF
BA	910	PPM	XRF
PB	12	PPM	XRF
TH	19	PPM	XRF
U	-10	PPM	XRF
CR	44	PPM	XRF
CO	26	PPM	XRF
NI	19	PPM	XRF
CU	21	PPM	XRF
ZN	82	PPM	XRF