IsoplotR [BGS mirror]

IsoplotR is an R package for geochronology that was designed to be free, flexible and future-proof. The package was named after (but is not based on) Ken Ludwig's popular Isoplot add-in to Microsoft Excel. It implements functions for U-Pb, Pb-Pb, Th-Pb, 40Ar/39Ar, K-Ca, Rb-Sr, Sm-Nd, Lu-Hf, Re-Os, U-Th-He, fission track and U-series disequilibrium dating as well as detrital geochronology.
This website provides easy to use point-and-click access to IsoplotR's most commonly used functions (see the TUTORIAL for details). Alternatively, the same functions (and more) can also be accessed from the command-line through the IsoplotR package on CRAN and GitHub.
IsoplotR is currently available in English, Chinese and Spanish (under construction).