Digital Elevation Model-Derived Fold Traces and Parameterized PFC2D Models for Contractional Tectonics

This deposit contains data, model states, and scripts used for DEM-based fold-trace analysis and two-dimensional discrete-element experiments in contractional tectonics. The topographic component includes 858 DEM-derived ridge segments used as fold-trace proxies, fixed processing parameters, aggregate map-view association data, and Python scripts for directional statistics and spatial-block tests. The source DEM, resampling procedure, ridge-selection threshold, skeleton tracing, and segmentation rules are documented. Third-party DEM raster tiles are not redistributed. The numerical component contains 48 saved states for PFC2D 5.00.25: eight pre-shortening states, eight states at 35% bulk shortening, and 32 continuation checkpoints. The models cover basement slopes of 0°, 0.5°, 2°, and 4° under two stratigraphic configurations. External parameter files define model selection, boundary velocities, wall identifiers, timestep, damping, numerical densities, target shortening, checkpoint spacing, and output paths. Definitions for 80 continuation tests and the corresponding 320 energy-history files are also included. The released M01 state was restored in licensed PFC2D 5.00.25, advanced by one mechanical cycle, and saved again without error. The validation record is included in the archive. Command records were removed from the released states to exclude workstation paths and the original model-construction command stream. PFC2D software and its license are not included. The deposit contains no 1:500,000 geological-map sheets, traced linework, masks, or other derivatives of those maps. It also contains no manuscript drafts or journal-specific files. The MIT License applies to the source-code files. CC BY 4.0 applies to the deposited data, figures, documentation, and workflow materials. PFC2D and third-party DEM or geological-map products are not included in these licenses.