Sample JH17

NavDat sample number 37519 · TRACHYANDESITE

Sample

Sample ID	JH17
Rock name	TRACHYANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	richer in phenocrysts than other rocks up to 55%; particularly distinguished by presence of hornblende which is absent from other Jackson Hole volcanic rocks but common in Absaroka volcanic rocks; plagioclase and hornblende show many disequilibrium features

Latitude	43.5022
Longitude	-110.825
Location	quarry W of West Gros Ventre Butte
State / province	Wyoming

Age (Ma)	Error	Min	Max	Geologic age	Dated by
6		3	10

Item	Value	Unit	Method
SIO2	60.18	WT%	XRF
AL2O3	17.23	WT%	XRF
TIO2	0.559	WT%	XRF
FEOT	5.9	WT%	XRF
MNO	0.08	WT%	XRF
CAO	5.1	WT%	XRF
MGO	2.52	WT%	XRF
K2O	2.78	WT%	XRF
NA2O	4.57	WT%	XRF
P2O5	0.362	WT%	XRF
NI	26	PPM	XRF
CR	62	PPM	XRF
SC	15	PPM	XRF
V	121	PPM	XRF
BA	924	PPM	XRF
RB	58	PPM	XRF
SR	876	PPM	XRF
ZR	171	PPM	XRF
Y	26	PPM	XRF
NB	11.9	PPM	XRF
GA	18	PPM	XRF
CU	38	PPM	XRF
ZN	83	PPM	XRF
PB	14	PPM	XRF
LA	33	PPM	XRF
CE	40	PPM	XRF
TH	3	PPM	XRF