Sample HSP-186

NavDat sample number 29326 · BASALT

Sample

Sample ID	HSP-186
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	alkali olivine basalt; microporphyritic with microphenos of olivine and plag in fine-grained, subophitic to intersertal matrix of plag, pyroxene, glass, and opaques; erupted from same cinder cone as unit 1; location given is for 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 2

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.26		0.1	0.42

Item	Value	Unit	Method
SIO2	48.9	WT%	EPMA
TIO2	1.83	WT%	EPMA
AL2O3	17.3	WT%	EPMA
FEOT	11.6	WT%	EPMA
MNO	0.18	WT%	EPMA
MGO	6.46	WT%	EPMA
CAO	8.64	WT%	EPMA
NA2O	3.07	WT%	EPMA
K2O	2.05	WT%	EPMA
P2O5	0.45	WT%	EPMA
TOTAL	100.48	WT%	EPMA
NB	31	PPM	XRF
ZR	165	PPM	XRF
Y	29	PPM	XRF
SR	429	PPM	XRF
RB	56	PPM	XRF
NI	63	PPM	XRF
CR	76	PPM	XRF
V	197	PPM	XRF
SC	23	PPM	XRF
BA	653	PPM	XRF