Denver Radiogenic Isotope Lab
Building 95 on the Denver Federal Center houses the Denver radiogenic isotope laboratory along with the Southwest Isotope Research Laboratory (SWIRL)
Thermal-ionization mass spectrometers constituting the core of the Denver Radiogenic Isotope Laboratory
Detritus-poor pedogenic coatings, like this one, are used to constrain minimum ages of alluvial deposition using U-series disequilibrium dating
millimeter-scale subsamples analyzed for U-series disequilibrium dating plus 87Sr/86Sr, 234U/238U, δ18O, and δ13C analyses
The GEC Science Center supports a laboratory facility that includes sample preparation labs, class-10,000 or better clean labs for chemical processing, and an instrument lab with multiple thermal ionization mass spectrometers (TIMS).
DRIL Facilities
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The GEC and G3 Science Centers jointly support a laboratory facility located in Building 95 of the Denver Fed Center that includes sample preparation labs, two class-10,000 or better clean labs for chemical processing, and an instrument lab for thermal ionization mass spectrometers (TIMS). The lab is effectively shared between Science Centers and provides a model for efficient use of space and communal resources.
The facility maintains two multi-collector TIMS instruments, including an IsotopX Phoenix (installed July 2017) and Thermo Finnigan Triton (installed 2004). These instruments are capable of running in fully automated modes or remotely through a secured internet connection. Both have moveable faraday cups allowing static or dynamic simultaneous multi-collection of large ion beams. Small ion beams are measured by single-collector peak-hopping methods using either a discrete-dynode electron multiplier or Daly-knob /photomultiplier collector.
Prior to TIMS analyses, chemical processing is required to separate and purify the element of interest. This typically involves acid-digestion and evaporation followed by ion chromatographic exchange on small, resin-filled columns. The clean labs include multiple HEPA-filtered work stations and evaporation boxes that provide class-1000 or better work spaces. As a result, samples are exposed to minimal environmental contamination during processing allowing analyses of very small samples.
