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




  • VG-MM54R, purchased in 1981, is nearly identical in design and capability to the VG-MM54E. It is primarily used for U-Th-Pb, neodymium-samarium, and rubidium-strontium isotopic analyses. Located in Denver.
  • KEVEX 770 X-ray Fluorescence Spectrometer, purchased in 1991, allows rapid turnaround and inexpensive analyses for a wide range of elements. These elements can be analyzed quantitatively if suitable standards exist, or semi-quantitatively. The XRF instrument is fully-automated and holds sixteen samples at a time. It uses source-tuned incident x-rays for optimal analysis conditions for a given element and has a high-resolution energy dispersive detector. Located in Denver.
  • MAT 262, purchased in 1993, is a fully-automated isotope-ratio TIMS. It is equipped with seven Faraday collectors, six of which are adjustable. The instrument is equipped with a 13-sample turret and an ion-counting electron multiplier. It is primarily used to analyze U and Th isotopes for U-series disequilibrium studies and Sr-isotope ratios for tracer studies. It is occasionally used for Pb and Sm-Nd isotopic analyses. Located in Denver.
  • MAT 262, purchased in 1993, multicollector (9 collectors), multi-sample (13 samples), mass spectrometer. Fully automated, equipped with an electron multiplier. The instrument is updated with a better water chiller and a newer computer system. Located in Reston.

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