This dataset provides whole-rock isotopic data from the Oumjrane gabbronorite intrusion, located in the eastern Anti-Atlas (Morocco), within the Northwest African Variscan belt. Samples were collected from a fully cored borehole intersecting a mafic intrusion emplaced within Paleozoic sedimentary successions of the Tafilalet–Maider basins during field campaigns conducted between 2021 and 2023.The dataset includes radiogenic isotope compositions (Sr–Nd–Pb) and stable oxygen isotope ratios (δ¹⁸O) for selected samples. Isotopic analyses were performed using standard mass spectrometry techniques. In addition, selected isotopic parameters correspond to calculated initial compositions derived from isotopic data at the time of magmatism. All isotopic data are reported at the whole-rock scale and are accompanied by detailed metadata, including sample identification, lithological descriptions, and analytical protocols. The dataset is provided in a tabulated format with clearly defined variables and units, ensuring reproducibility. These data provide a robust framework for investigating magma sources, crustal contamination, and magmatic evolution processes within the Oumjrane intrusion.

Funded by: European Union's Learning Mobility of Individuals program (AC 171) UNAM research grant