000125296 001__ 125296
000125296 005__ 20240705134213.0
000125296 0247_ $$2doi$$a10.3390/min13030300
000125296 0248_ $$2sideral$$a133021
000125296 037__ $$aART-2023-133021
000125296 041__ $$aeng
000125296 100__ $$aGonzález-Pérez, Igor
000125296 245__ $$aThe unconventional peridotite-related Mg-Fe-B skarn of the el robledal, SE Spain
000125296 260__ $$c2023
000125296 5060_ $$aAccess copy available to the general public$$fUnrestricted
000125296 5203_ $$aThe El Robledal deposit is a Mg-Fe-B skarn hosted in a dismembered block from the footwall contact of the Ronda orogenic peridotites in the westernmost part of the Betic Cordillera. The skarn is subdivided into two different zones according to the dominant ore mineral assemblage: (1) the ludwigite–magnetite zone, hosted in a completely mineralized body along with metasomatic forsterite, and (2) the magnetite–szaibelyite zone hosted in dolomitic marbles. In the ludwigite–magnetite zone, the massive mineralization comprises ludwigite (Mg2Fe3+(BO3)O2), Mg-rich magnetite, and magnetite, with minor amounts of kotoite (Mg3(BO3)2), szaibelyite (MgBO2(OH)), accessory schoenfliesite (MgSn4+(OH)6), and pentlandite. The ratio of ludwigite–magnetite decreases downwards in the stratigraphy of this zone. In contrast, the mineralization in the magnetite–szaibelyite zone is mainly composed of irregular and folded magnetite pods and bands with pull-apart fractures, locally associated with a brucite-, szaibelyite-, and serpentine-rich groundmass. The set of inclusions identified within these ore minerals, using a combination of a focused ion beam (FIB) and high-resolution transmission electron microscope (HRTEM), supports the proposed evolution of the system and reactions of the mineral formation of the skarn. The analysis of the microstructures of the ores by means of electron backscatter diffraction (EBSD) allowed for the determination that the ores experienced ductile deformation followed by variable degrees of recrystallization and annealing. We propose a new classification of the deposit as well as a plausible genetic model in a deposit where the heat source and the ore-fluid source are decoupled.
000125296 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/PRE2019-088262
000125296 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000125296 592__ $$a0.495$$b2023
000125296 593__ $$aGeotechnical Engineering and Engineering Geology$$c2023$$dQ2
000125296 593__ $$aGeology$$c2023$$dQ2
000125296 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000125296 700__ $$0(orcid)0000-0002-0302-2737$$aFanlo, Isabel$$uUniversidad de Zaragoza
000125296 700__ $$aAres, Gonzalo
000125296 700__ $$aGervilla, Fernando
000125296 700__ $$aGonzález-Jiménez, José María
000125296 700__ $$aAcosta-Vigil, Antonio
000125296 700__ $$0(orcid)0000-0002-0710-9178$$aArranz, Enrique$$uUniversidad de Zaragoza
000125296 7102_ $$12000$$2685$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Petrología y Geoquímica
000125296 7102_ $$12000$$2120$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Cristalografía Mineralog.
000125296 773__ $$g13, 3 (2023), 300 [28 pp.]$$pMinerals (Basel)$$tMinerals$$x2075-163X
000125296 8564_ $$s4865006$$uhttps://zaguan.unizar.es/record/125296/files/texto_completo.pdf$$yVersión publicada
000125296 8564_ $$s2761758$$uhttps://zaguan.unizar.es/record/125296/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000125296 909CO $$ooai:zaguan.unizar.es:125296$$particulos$$pdriver
000125296 951__ $$a2024-07-05-12:52:08
000125296 980__ $$aARTICLE