IsoplotR6.7 package

Statistical Toolbox for Radiometric Geochronology

age

Calculate isotopic ages

age2ratio

Predict isotopic ratios from ages

agespectrum

Plot a (40Ar/39Ar) release spectrum

cad

Plot continuous data as cumulative age distributions

central

Fits random effects models to overdispersed datasets

ci

Confidence intervals

classes

Geochronological data classes

concordia

Concordia diagram

data2york

Prepare geochronological data for York regression

discfilter

Set up a discordance filter

diseq

Set up U-series disequilibrium correction for U-Pb geochronology

diss

Dissimilarity between detrital age distributions

ellipse

Get error ellipse coordinates for plotting

evolution

Th-U evolution diagram

helioplot

Visualise U-Th-He data on a logratio plot or ternary diagram

isochron

Calculate and plot isochrons

IsoplotR

library(IsoplotR)

kde

Create (a) kernel density estimate(s)

ludwig

Linear regression of U-Pb data with correlated errors, taking into acc...

mclean

Predict disequilibrium concordia_compositions

mds

Multidimensional Scaling

ogls

Omnivariant Generalised Least-Squares Regression

Pb0corr

Common Pb correction

peakfit

Finite mixture modelling of geochronological datasets

radialplot

Visualise heteroscedastic data on a radial plot

read.data

Read geochronological data

scatterplot

Create a scatter plot with error ellipses or crosses

set.zeta

Calculate the zeta calibration coefficient for fission track dating

settings

Retrieve and record global settings

titterington

Linear regression of X,Y,Z-variables with correlated errors

weightedmean

Calculate the weighted mean age

york

Linear regression of X,Y-variables with correlated errors

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', 'Ludwig' and Omnivariant Generalised Least-Squares ('OGLS') 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 40Ar/39Ar 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, Th-Pb, K-Ca, Re-Os, Sm-Nd, Lu-Hf, Rb-Sr and 230Th-U isochrons as well as 230Th-U evolution plots.

  • Maintainer: Pieter Vermeesch
  • License: GPL-3
  • Last published: 2025-07-30