Sample HSP-91

NavDat sample number 29282 · BASALT

Sample

Sample ID	HSP-91
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	44.7	WT%	EPMA
TIO2	3.21	WT%	EPMA
AL2O3	15	WT%	EPMA
FEOT	14.85	WT%	EPMA
MNO	0.2	WT%	EPMA
MGO	7.51	WT%	EPMA
CAO	10.15	WT%	EPMA
NA2O	2.43	WT%	EPMA
K2O	0.46	WT%	EPMA
P2O5	0.76	WT%	EPMA
TOTAL	99.27	WT%	EPMA
NB	29	PPM	XRF
ZR	302	PPM	XRF
Y	45	PPM	XRF
SR	349	PPM	XRF
RB	2	PPM	XRF
NI	86	PPM	XRF
CR	194	PPM	XRF
V	326	PPM	XRF
SC	34	PPM	XRF
BA	411	PPM	XRF