USGS-GD-Scientific Capabilities - Pb 210 Technique

 

Pb 210

Technique


  Radium-226 of the 238U decay chain produces 222Rn, which escapes to the atmosphere where it decays with a 3.8 day half-life ultimately to a longer-lived 210Pb radioisotope which precipitates back to earth within several days. The t1/2 = 22.3 years of 210Pb give this geochronologic technique a useful range of approximately 150- 200 years and useful applications in dating snowfall, recent fresh and marine sedimentation, and historic environmental pollutant rates (metals). The 210Pb activity in virtually any material can be determined with counters available in the Denver radiochemistry lab.
 


 | Capabilities |
| Geochronology, Geochemistry, and Tracer Studies  |
| Geochronology  |

 


URL http://geology.cr.usgs.gov/capabilities/gronemtrac/geochron/pb210/tech.html