ISOPLOT; a plotting and regression program for radiogenic-isotope data; version 2.53

Abstract

Construct U-Pb concordia plots (conventional, Tera-Wasserburg, or Tatsumoto-style) and calculate concordia-intercept ages and errors (p. 18); ^ Construct projections of 3-dimensional (X-Y-Z) plots, determine best-fit planes to X-Y-Z data, and calculate concordia intercepts and uncertainties for 3-dimensional concordia data (p. 21, 24); * Construct single-stage growth-curves for plots of common-Pb data (p. 21, 24); * Construct MOTh/238U -^U^U evolution curves for U-series data (p. 26); ^ Calculate and construct plots for weighted averages of a single variable (p. 28); ^ Show histograms of a data-set, with calculated mean, median, and biweight-mean values (p. 28); * Calculate radiogenic 207Pb/206Pb ages, common-Pb model ages, Nd, Sr, Os, and Hf model ages, U-series ages, and ages from the secular global-marine Sr-isotope trend (pp. 30-31); * Do curvilinear (polynomial) regressions for X-Y data (p. 17);