IsoplotR is a toolkit for isotope geochronology. Plots U-Pb
data on Wetherill and Tera-Wasserburg concordia
diagrams. Calculates concordia and discordia ages. Performs linear
regression of measurements with correlated errors using `York',
`Titterington' and `Ludwig' approaches. Generates Kernel Density
Estimates (KDEs) and Cumulative Age Distributions (CADs). Produces
Multidimensional Scaling (MDS) configurations and Shepard plots of
multi-sample detrital datasets using the Kolmogorov-Smirnov
distance as a dissimilarity measure. Calculates
\(^{40}\)Ar/\(^{39}\)Ar ages, isochrons, and age
spectra. Computes weighted means accounting for
overdispersion. Calculates U-Th-He (single grain and central) ages,
logratio plots and ternary diagrams. Processes fission track data
using the external detector method and LA-ICP-MS, calculates
central ages and plots fission track and other data on radial
(a.k.a. `Galbraith' plots). Constructs total Pb-U, Pb-Pb, Re-Os,
Sm-Nd, Lu-Hf, Rb-Sr and \(^{230}\)Th-U isochrons as well as
\(^{230}\)Th-U evolution plots.
A list of documented functions may be viewed by typing
help(package='IsoplotR'). Detailed instructions are
provided at http://isoplotr.london-geochron.com. A manuscript
with the theoretical background is in preparation.
Useful links: