Sample HSP-40

NavDat sample number 29320 · BASALT

Sample

Sample ID	HSP-40
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	48.8	WT%	EPMA
TIO2	1.79	WT%	EPMA
AL2O3	16.5	WT%	EPMA
FEOT	10.53	WT%	EPMA
MNO	0.16	WT%	EPMA
MGO	8.9	WT%	EPMA
CAO	10.07	WT%	EPMA
NA2O	2.07	WT%	EPMA
K2O	1.05	WT%	EPMA
P2O5	0.11	WT%	EPMA
TOTAL	100.05	WT%	EPMA
NB	29	PPM	XRF
ZR	164	PPM	XRF
Y	27	PPM	XRF
SR	452	PPM	XRF
RB	33	PPM	XRF
NI	127	PPM	XRF
CR	268	PPM	XRF
V	212	PPM	XRF
SC	23	PPM	XRF
BA	511	PPM	XRF
D18O	5.64	PERMILL	MS