The μ-composition, measured in parts per million (ppm), of 182W (μ182W) shows significant positive and negative variations from a standard composition within mantle-derived rocks. A combination of three scenarios—late accretion, core-mantle interaction, and early planetary differentiation—have been proposed to explain these variations. To test this hypothesis, a multiphase thermal chemical fluid dynamics (MTCFD) numerical model was used to simulate mantle physics and chemistry of these three different scenarios. This work aimed to replicate the μ182W composition of bulk silicate Earth (BSE; crust+mantle) over 4.5 billion years, which previous research constrains to initial and final values of +25 ppm and 0 ppm, respectively. Preliminary simulations using low-resolution were run on laptops. These results provided quantitative and qualitative data on the evolution of μ182W in the BSE. Preliminary results indicate final values of +15 ppm (late accretion), -20 ppm (core-mantle interaction), +25 ppm (early planetary differentiation), and -5 ppm (combined). The combined scenario more closely replicates the BSE record compared to individual scenarios, suggesting that a combination may account for the variability of 182W in Earth’s mantle. Based on these results, further simulations with different initial conditions will be run on the Graham supercomputer for a high-resolution and more comprehensive data set.
