Mac OS Education
This program has been written to facilitate the analysis and interpretation of argon geochronology data from step-heating experiments in vacuo in a furnace attached to a mass spectrometer. Data is input in XML format with data tags available for individual laboratories by request.
Version 9 of eArgon allows conjoint inversion to define diffusion parameters. To do this the program uses 39Ar release data from furnace-controlled temperature-step-heating ultra-high-vauum (UHV) diffusion experiments. The analysis of 40Ar/39Ar geochronology obtained during these experiments proceeds unchanged. The diffusion parameters, along with the furnace schedule used in measurement, and a reference age spectrum, can be exported to allow forward modelling of the effect of arbitrary pressure-temperature-time histories on the age spectrum using the MacArgon program. The eArgon Wunderkind routines using Monte Carlo routines to rapidly determine the least-squares best fit to a set of selected Arrhenius data points and/or to points in a r/r0 plot. Conjoint inversion is enabled, with variable weighting of particular points in either diagram able to be imposed in order to encourage compliance with the Fundamental Asymmetry Principle. Version §9.1 implements concurrent queues during the Wunderkind inversion process, leading to at least a tenfold increase in processing speed. Version §9.1.1 is a minor update to take account of how many tasks have been queued, to prevent a 'jamming' overload.