Sample HSP-66

NavDat sample number 29334 · BASALT

Sample

Sample ID	HSP-66
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	alkali olivine basalt; erupted from small shield volcano 1.5 km south of cinder cone which sourced the other Smith Praire units; porphyritic with phenos of plag and olivine in intersertal to intergranular groundmass of plag, olivine, pyroxene, sanidine, glass and opaques; given location is for the vent

Latitude	43.509
Longitude	-115.505
Location	Western Snake River Plain
State / province	Idaho
Volcanic field	Boise River Group 2, Smith Praire basalt, unit 3

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.2		0.05	0.35

Item	Value	Unit	Method
SIO2	47.6	WT%	EPMA
TIO2	1.99	WT%	EPMA
AL2O3	17.1	WT%	EPMA
FEOT	10.78	WT%	EPMA
MNO	0.16	WT%	EPMA
MGO	6.7	WT%	EPMA
CAO	9.96	WT%	EPMA
NA2O	2.83	WT%	EPMA
K2O	1.62	WT%	EPMA
P2O5	0.52	WT%	EPMA
TOTAL	99.21	WT%	EPMA
NB	29	PPM	XRF
ZR	166	PPM	XRF
Y	29	PPM	XRF
SR	516	PPM	XRF
RB	39	PPM	XRF
NI	64	PPM	XRF
CR	132	PPM	XRF
V	218	PPM	XRF
SC	29	PPM	XRF
BA	600	PPM	XRF