Sample HSP-18

NavDat sample number 29280 · BASALT

Sample

Sample ID	HSP-18
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	silica-saturated olivine tholeiite; pahoehoe flows; large plag phenos and smaller olivine microphenos in medium to coarse grained, ophitic, diktytaxitic groundmass; location given is for the vent

Latitude	43.4795
Longitude	-115.564
Location	Western Snake River Plain
State / province	Idaho
Volcanic field	Boise River Group 1, Steamboat Rock basalt

Age (Ma)	Error	Min	Max	Geologic age	Dated by
1.8		1.5	2.1

Item	Value	Unit	Method
SIO2	46.7	WT%	EPMA
TIO2	2.92	WT%	EPMA
AL2O3	15.2	WT%	EPMA
FEOT	13.67	WT%	EPMA
MNO	0.15	WT%	EPMA
MGO	7.46	WT%	EPMA
CAO	9.66	WT%	EPMA
NA2O	2.43	WT%	EPMA
K2O	0.65	WT%	EPMA
P2O5	0.42	WT%	EPMA
TOTAL	99.3	WT%	EPMA
NB	32	PPM	XRF
ZR	276	PPM	XRF
Y	53	PPM	XRF
SR	404	PPM	XRF
RB	6	PPM	XRF
NI	74	PPM	XRF
CR	188	PPM	XRF
V	267	PPM	XRF
SC	27	PPM	XRF
BA	758	PPM	XRF