Sample SSP-26

NavDat sample number 29337 · BASALT

Sample

Sample ID	SSP-26
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	47.9	WT%	EPMA
TIO2	1.95	WT%	EPMA
AL2O3	16.9	WT%	EPMA
FEOT	10.55	WT%	EPMA
MNO	0.1	WT%	EPMA
MGO	6.66	WT%	EPMA
CAO	9.4	WT%	EPMA
NA2O	2.98	WT%	EPMA
K2O	1.59	WT%	EPMA
P2O5	0.54	WT%	EPMA
TOTAL	98.52	WT%	EPMA
NB	35	PPM	XRF
ZR	191	PPM	XRF
Y	28	PPM	XRF
SR	495	PPM	XRF
RB	31	PPM	XRF
NI	70	PPM	XRF
CR	145	PPM	XRF
V	201	PPM	XRF
SC	23	PPM	XRF
BA	611	PPM	XRF