Sierra Minera Soil Geochemistry Legacy Dataset (Anonymized Source Files, SE Spain)

This dataset contains soil geochemistry measurements from the Sierra Minera mining district (Cartagena–La Unión, SE Spain). The dataset compiles heterogeneous legacy laboratory spreadsheets and analytical reports used in previous soil studies conducted across the mining district. Included data sources comprise: total elemental concentrations in soils DTPA-extractable trace elements sequential extraction results (BCR method) urban and agricultural soil samples laboratory analytical reports To ensure privacy and improve data standardization, all source filenames have been anonymized and harmonized. Main source files included in the dataset: legacy_soils_source_01.xls dtpa_agricultural_natural_soils.xlsx agricultural_soils_bcr_sequential_extraction.xlsx urban_soils_results_table.xlsx total_soils_concentrations.xlsx laboratory_report_surface_sealing.xlsx The files include sample identifiers, UTM coordinates, soil elemental concentrations, and laboratory-derived analytical outputs. The dataset is provided in its original heterogeneous analytical structure and serves as the primary data source for reproducible data integration, exploratory analysis, and spatial modelling workflows. This dataset supports subsequent pipelines for multi-element mapping, interpolation, and environmental risk screening in the Sierra Minera district.