This code allows users to model the behavior of elements onto a chromatographic resin and rapidly test complex elution schemes to optimize the separation of any number of elements of interest prior to implementation in the laboratory. (Related articles Li et al., 2021 and Ireland et al., 2013).

Software download (332 KB).

Code: Mathematica notebook. Input format: xlsx, xls, csv.

An inverse model to constrain the most likely history of seafloor anoxia for any given δ238U dataset, and enable consistent comparisons between datasets. The code takes as input the samples’ ages and δ238U values, along with their associated uncertainties. Then, using Bayesian inference via Markov Chain Monte Carlo simulation, it outputs the most likely seafloor anoxia history that can explain the data, along with error envelops for each percentile. (Related article Kipp & Tissot, 2022).

See https://github.com/m-kipp/d238U-inverse-model for more details.

Software download (1.4 MB, v1.0).

Code: R. Input format: csv.

The cosmo software package was developed to allow for the optimization of a double spike (DS) best suited for analyzing small samples with mass-independent isotope effects (e.g., radiogenic excess, nucleosynthetic anomalies). It consists in a suite of add-on functions that seamlessly integrate within the original DS Toolbox and aim to expand its applicability to a wider array of samples and measurement. These scripts can simply be copied and pasted to an existing download of the DS Toolbox that has the 'fixed voltage' error model (v. 1.02 or later). (Related article Marquez & Tissot, 2022).

See https://github.com/rcmarq/cosmo for more details.

Code: Matlab.

A simple program using the density profile of a spherical body to calculates its mass, acceleration of gravity, and pressure profiles. The code takes as input the size and density profile of the body (entered via import of an excel/csv file). With these data, the code calculates the mass contained in each radius increment (outward from the center of the body) to establish the acceleration of gravity profile in the body, g(z), which is then used to calculate the hydrostatic pressure at each depth, P(z). A user box allows the user to ask at what depth a certain pressure is reached. (Related article Tissot et al., 2022).

Software download (1.1 MB).

Code: Mathematica notebook. Input format: xlsx, xls, csv.

CADs and setup details — To allow easier replication of our optimized methods for high-precision Nd isotope analyses, and in addition to the details on the chromatography provided in the paper (Hyung & Tissot, 2021), you can find here the list of all labware and suggested reagents, as well as CAD drawings of the column holder assembly.

CADs download (1.5 MB) + List of labware/reagents (19 KB).

CADs: SolidWorks and PDF files / List labware: excel file.