Development and implications of a new open-source time-temperature inversion program

Time-temperature inversion is a critical step in the interpretation and application of thermochronologic data. However, the computational source code for such programs has typically not been freely available, limiting reproducibility. Here we present a new fully open-source (GPL-3.0) time-temperature inversion program, Thermochron.jl, developed in the Julia programming language. This program initially aims to invert zircon helium and apatite helium data via a Markov chain Monte Carlo approach, and allow for the propagation of uncertainty in diffusion parameters. Here we will present the testing and validation of this model, and consider the implications for some open problems in thermochronology, including the limits of resolution for deep-time thermochronology.