Sample HSP-21

NavDat sample number 29277 · BASALT

Sample

Sample ID	HSP-21
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	46.6	WT%	EPMA
TIO2	3.08	WT%	EPMA
AL2O3	15.1	WT%	EPMA
FEOT	13.38	WT%	EPMA
MNO	0.18	WT%	EPMA
MGO	6.93	WT%	EPMA
CAO	9.85	WT%	EPMA
NA2O	2.66	WT%	EPMA
K2O	0.69	WT%	EPMA
P2O5	0.69	WT%	EPMA
TOTAL	99.12	WT%	EPMA
NB	33	PPM	XRF
ZR	300	PPM	XRF
Y	43	PPM	XRF
SR	347	PPM	XRF
RB	6	PPM	XRF
NI	76	PPM	XRF
CR	222	PPM	XRF
V	313	PPM	XRF
SC	28	PPM	XRF
BA	488	PPM	XRF