Sample HSP-187

NavDat sample number 29325 · BASALT

Sample

Sample ID	HSP-187
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	49.4	WT%	EPMA
TIO2	1.99	WT%	EPMA
AL2O3	17.3	WT%	EPMA
FEOT	12.3	WT%	EPMA
MNO	0.2	WT%	EPMA
MGO	6.09	WT%	EPMA
CAO	8.35	WT%	EPMA
NA2O	2.83	WT%	EPMA
K2O	2.01	WT%	EPMA
P2O5	0.28	WT%	EPMA
TOTAL	100.73	WT%	EPMA
NB	30	PPM	XRF
ZR	158	PPM	XRF
Y	28	PPM	XRF
SR	449	PPM	XRF
RB	58	PPM	XRF
NI	55	PPM	XRF
CR	69	PPM	XRF
V	203	PPM	XRF
SC	25	PPM	XRF
BA	661	PPM	XRF