USGS-GD-Scientific Capabilities -  Sm-Nd SYSTEM Technique

 

Sm-Nd SYSTEM

Technique


 

Sm-Nd geochronology

  • Age of crystallization/emplacement.
  • Age range: Precambrian (older than 570 million years) except in specific circumstances.
  • Normally used as an auxiliary method or to date mafic rocks that do not contain minerals suitable for dating by U-Pb.

Sm-Nd "model ages"

  • Model-dependent approximation for the age of separation of a magma from the mantle.
 


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

 


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