Sample J81-216

NavDat sample number 30655 · GABBRO

Sample

Sample ID	J81-216
Rock name	GABBRO
Rock type	PLUTONIC
Composition	MAFIC
Material	IGNEOUS
Comment	NEPHELINE GABBRO

Location

Latitude	31.4333
Longitude	-104.883
Location	Marble Canyon Stock; Trans-Pecos
State / province	TEXAS

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
36.7		33.03	40.37

Analyses

MINERAL

Item	Value	Std. dev.	Unit	Method
PB206_PB204	18.301			TIMS
PB207_PB204	15.521			TIMS
PB208_PB204	37.99			TIMS

References

James, Eric William; Henry, Christopher D (1993) Southeastern extent of the North American Craton in Texas and northern Chihuahua as revealed by Pb isotopes; with Suppl. Data 9310. Geological Society of America Bulletin, vol.105, no.1, pp.116-126, Jan 1993 doi:10.1130/0016-7606(1993)105<0116:SEOTNA>2.3.CO;2