Sample HSP-1

NavDat sample number 29290 · BASALT

Sample

Sample ID	HSP-1
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	alkali olivine basalt; aa flow erupted from cinder cone; nearly aphyritic; rare phenos of olivine and plag; intersertal groundmass of plag, olivine, glass, rare pyroxene, and stable K-feldspar; contains numerous granitic xenoliths in various stages of dissaggregation near its vent; location given is for the vent

Latitude	43.525
Longitude	-115.566
Location	Western Snake River Plain
State / province	Idaho
Volcanic field	Boise River Group 2, Smith Creek basalt

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.35		0.2	0.5

Item	Value	Unit	Method
SIO2	48.4	WT%	EPMA
TIO2	2.39	WT%	EPMA
AL2O3	17.3	WT%	EPMA
FEOT	12.72	WT%	EPMA
MNO	0.16	WT%	EPMA
MGO	6.63	WT%	EPMA
CAO	8.5	WT%	EPMA
NA2O	2.32	WT%	EPMA
K2O	1.68	WT%	EPMA
P2O5	0.36	WT%	EPMA
TOTAL	100.43	WT%	EPMA
NB	29	PPM	XRF
ZR	147	PPM	XRF
Y	44	PPM	XRF
SR	328	PPM	XRF
RB	40	PPM	XRF
NI	110	PPM	XRF
CR	238	PPM	XRF
V	267	PPM	XRF
SC	29	PPM	XRF
BA	1028	PPM	XRF
D18O	6.3	PERMILL	MS