# This is a supplement to the manuscript "Segregation of a thermochemical anomaly and coalescence with a large low-velocity province" currently accepted of Nature Geoscience. The objective of this supplement is to offer the user access to our model outputs, which include reproducible map data files and 3-D images. Additionally, we provide the seismological data utilized in the manuscript. 1. The "map_files" folder contains the map data obtained at a depth of 2800 km from our model, as listed in Extended Data Table 1. 2. The "paraview_files" directory includes a state file named "Reference_Model_Visualisation.pvsm" that enables the reproduction of Figure 2 as presented in the main text. 3. The "tomography" folder contains the map and slice data files of the tomography utilized in the manuscript. 4. "quantitative_comparison" folder contains quantitative comparisons of the model results with the S-wave and P-wave votemap. (0: True Negatives, 1: True Positives, 2: False Negatives, 3: False Positives) 5. The file "Modeled_Kamchatka_LIPs.xyz" contains the Kamchatka Large Igneous Provinces (LIPs) created by our models, as depicted in Extended Data Figure 7.