Primary Geochronology/Thermochronology Analyses Offered
Apatite Fission Track and Uranium-Lead Analysis (AFT+UPb)
- Combined FT+UPb grain ages using LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometer)
- 20-40 grains dated; detrital analysis (80-100 grains) available for extra cost
- Kinetic parameters Dpar and/or Rmro on every age grain analyzed
- Enhancement of measureable confined track density using Cf irradiation
- Up to 125 (igneous rock) or 150 (sedimentary rock) confined fission-track length measurements
- Fully calibrated HeFTy thermal history modeling if requested
- Digital report including analyses of standards
Zircon Fission Track and Uranium-Lead (ZFT+UPb)
- Combined FT+UPb grain ages using LA-ICP-MS
- Up to 20 grains dated; double or detrital analyses available for extra cost
- Digital report including analyses of standards
Zircon UPb Crystallization Age Dating (CZ)
- Dating of UPb zircon grains using LA-ICP-MS
- 15-30 grains dated
- Estimate of CZ age based on the youngest concordant grain-age population
- Digital report including analyses of standards
Zircon UPb Detrital Age Dating (DZ)
- Dating of UPb zircon grains using LA-ICP-MS
- Up to 110 grains dated
- First-pass analysis of grain age populations based on Gaussian deconvolution
- Digital report including analyses of standards
Additional Analyses Coordinated
Apatite and/or Zircon: (U-Th-Sm)/He dating (AHe)
- Digital report including analyses of standards
- Coordinated with others; contact us for more information
Apatite and/or Zircon: Electron Probe Microanalysis (EPMA)*
- Up to 14 elemental concentration measurements (O, F, Na, Mg, P, S, Ca, Mn, Fe, Sr, Y, La, Ce, Cl) for each apatite grain that yields FT age and length data
- Digital report including analyses of standards
CL imaging of ZrnUPb grains*
- Images and associated information
*Both EPMA and CL services would be carried out by the EPMA and ERD Laboratories, School of the Environment, Washington State University (phone: +1-509-335-6770). EPMA and CL services will be billed directly by WSU – not through GSS. GSS charges a handling fee to cover costs associated with providing grain mounts and x-y grain-relocation files.