Sample HSP-73

NavDat sample number 29309 · BASALT

Sample

Sample ID	HSP-73
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	49.6	WT%	EPMA
TIO2	1.92	WT%	EPMA
AL2O3	16.8	WT%	EPMA
FEOT	10.39	WT%	EPMA
MNO	0.11	WT%	EPMA
MGO	6.58	WT%	EPMA
CAO	9.14	WT%	EPMA
NA2O	2.83	WT%	EPMA
K2O	1.7	WT%	EPMA
P2O5	0.29	WT%	EPMA
TOTAL	99.43	WT%	EPMA
NB	38	PPM	XRF
ZR	208	PPM	XRF
Y	31	PPM	XRF
SR	496	PPM	XRF
RB	41	PPM	XRF
NI	70	PPM	XRF
CR	138	PPM	XRF
V	189	PPM	XRF
SC	26	PPM	XRF
BA	682	PPM	XRF