Sample HSP-25

NavDat sample number 29317 · BASALT

Sample

Sample ID	HSP-25
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	48.3	WT%	EPMA
TIO2	1.94	WT%	EPMA
AL2O3	16.6	WT%	EPMA
FEOT	10.6	WT%	EPMA
MNO	0.14	WT%	EPMA
MGO	7.76	WT%	EPMA
CAO	9.3	WT%	EPMA
NA2O	2.91	WT%	EPMA
K2O	1.51	WT%	EPMA
P2O5	0.31	WT%	EPMA
TOTAL	99.34	WT%	EPMA
NB	33	PPM	XRF
ZR	181	PPM	XRF
Y	25	PPM	XRF
SR	511	PPM	XRF
RB	36	PPM	XRF
NI	96	PPM	XRF
CR	213	PPM	XRF
V	189	PPM	XRF
SC	24	PPM	XRF
BA	573	PPM	XRF