Hf SYSTEM Technique

	Lu-Hf geochronology and mantle evolution, depletion, and heterogeneity. With a 35.4 billion year half-life, this system is of limited use for most present-day USGS geochronology and tracer work.
	| Capabilities | | Geochronology, Geochemistry, and Tracer Studies  | | Geochemistry, and Tracer Studies  |

URL http://geology.cr.usgs.gov/capabilities/gronemtrac/geochem/hf/tech.html