RT info:eu-repo/semantics/article T1 The hearth of the matter: A high-resolution magnetic microarchaeological study of a Neanderthal combustion feature utilizing Quantum Diamond Microscopy A1 Dinçkal, Ada A1 Feinberg, Joshua M. A1 Herrejón Lagunilla, Ángela A1 Papavasiliou, Dimitri A1 Carrancho Alonso, Ángel A1 Hernández Gómez, Cristo M. A1 Mallol, Carolina K1 Geoarchaeology K1 Paleolithic fires K1 Archaeomagnetism K1 Archaeological science K1 Archaeological methodology K1 Soil science K1 Geoscience methodology K1 Geoarqueología K1 Archaeological geology AB This study presents an integrative geoarchaeological and microarchaeological case study of combustion features,employing a multi-method analytical approach incorporating archaeomagnetic, rock magnetic, and soil micromorphologicalmethods, alongside Quantum Diamond Microscopy (QDM). The case study focuses on a combustionfeature from the Middle Palaeolithic site of El Salt (80 to 45.2ka). The primary aim is to reconstruct thedepositional and post-depositional history of this combustion feature, identifying human activities and environmentalprocesses using high-resolution magnetic and micromorphological data.The combustion feature H89/90 was studied as part of the research into a large palimpsest of combustionfeatures located within Unit XI. Archaeomagnetic and rock magnetic microarchaeological analyses of the combustionfeature demonstrates that it is relatively well-preserved and in situ. This integrative approach revealsclear evidence of anthropogenic behaviours, including hearth maintenance, the use of grass-based fuels, andpotentially the active sustaining of fire through the successive addition of these fuels. Furthermore, the studyhighlights maghemite as the primary magnetic carrier within the combustion feature. This mineral is notcommonly reported as a dominant magnetic phase in archaeological hearths. Its presence suggests either previouslyunrecognized burning conditions, microenvironmental factors unique to this feature, or a broader need toimprove the resolution at which hearth mineralogy is studied.These interpretations are possible through high-resolution rock magnetic analysis, enhanced by QDM'smicrometer-scale magnetic field mapping. Representing the first known application of QDM in archaeologicalscience, this method allows researchers to visualize internal magnetic fabrics directly within thin sections,enabling the identification of specific microfacies and magnetic structures that are typically invisible to traditionalmicromorphological analysis. As a result, this method not only deepens our understanding of the magneticarchitecture of the hearth but also strengthens behavioural interpretations of its formation and use. Overall, thestudy demonstrates the value of a deeply integrated magnetic microarchaeological approach for investigatinghuman behaviour associated with fire use. PB Elsevier SN 0305-4403 YR 2026 FD 2026-06 LK https://hdl.handle.net/10259/12210 UL https://hdl.handle.net/10259/12210 LA eng NO This work was supported by the Municipality of Alcoy, Spanish Government projects HAR2015- 68321-P (MINECO FEDER/UE) and PID2023-150177NB-I0, and a Spanish Government FPI predoctoral grant to A.D. Á.C. acknowledges the project PID2024-159094NB-I00, funded by MICIU/AEI/10.13039/501100011033/ERDF, EU) and the project BU037P23 of Junta de Castilla y León and the European Regional Development Fund.A. H-L also acknowledges a post-doctoral contract associated with the latter project and a Margarita Salas post-doctoral contract (2022-2024; Spanish Ministry of Universities; European Union-NextGenerationEU). DS Repositorio Institucional de la Universidad de Burgos RD 01-oct-2026