Pb SYSTEM Technique

	Pb isotopic tracers Low level (ppb or less) concentrations Provides sources of Pb as well as amounts. Normally used in conjunction with other isotopic tracers (Sr, Nd). Applications: Amounts and sources of heavy metals in water or sediments Magmatic evolution and sources Sources of metals in ore deposits.
	| Capabilities | | Geochronology, Geochemistry, and Tracer Studies  | | Geochemistry, and Tracer Studies  |

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