Sample 17445

NavDat sample number 125516 · LAMPROITE

Sample

Sample ID	17445
Rock name	LAMPROITE
Rock type	VOLCANIC
Composition	EXOTIC
Material	IGNEOUS

Location

Latitude	41.822
Longitude	-108.996
Location	Leucite Hill
State / province	Montana

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
2.25		1.4	3.1

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SR87_SR86	0.70552			MS
ND143_ND144	0.511774			MS
PB206_PB204	17.66			MS
PB207_PB204	15.523			MS
PB208_PB204	37.68			MS

References

O'Brien, Hugh E; Irving, Anthony J; McCallum, I S; Thirlwall, MatthewF (1995) Strontium, neodymium, and lead isotope evidence for the interaction ofpost-subduction asthenospheric potassic mafic magmas of the HighwoodMountains, Montana, USA, with ancient Wyoming craton lithosphericmantle. Geochimica et Cosmochimica Acta, vol.59, no.21, pp.4539-4556, Nov1995 doi:10.1016/0016-7037(95)99266-J