Sample RH-34

NavDat sample number 34503 · TRACHYTE

Sample

Sample ID	RH-34
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	54.5	WT%	XRF
TIO2	0.85	WT%	XRF
AL2O3	16	WT%	XRF
FE2O3T	6.53	WT%	XRF
MNO	0.17	WT%	XRF
MGO	2.74	WT%	XRF
CAO	6.03	WT%	XRF
NA2O	4.07	WT%	XRF
K2O	5.21	WT%	XRF
P2O5	0.32	WT%	XRF
LOI	2.62	WT%	XRF
TOTAL	99.04	WT%	XRF
RB	109	PPM	XRF
SR	1580	PPM	XRF
Y	33	PPM	XRF
ZR	200	PPM	XRF
NB	26	PPM	XRF
BA	1200	PPM	XRF
PB	17	PPM	XRF
TH	17	PPM	XRF
U	-10	PPM	XRF
CR	69	PPM	XRF
CO	21	PPM	XRF
NI	22	PPM	XRF
CU	21	PPM	XRF
ZN	93	PPM	XRF