The Aguablanca Cu–Ni ore deposit (Extremadura, Spain), a case of synorogenic orthomagmatic mineralization: age and isotope composition of magmas (Sr, Nd) and ore (S)

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dc.contributor.authorCasquet Martín, César
dc.contributor.authorGalindo Francisco, María Del Carmen
dc.contributor.authorTornos Arroyo, Fernando
dc.contributor.authorVelasco Roldán, Francisco
dc.contributor.authorCanales Gallarosa, Ángel
dc.date.accessioned2023-06-20T16:47:15Z
dc.date.available2023-06-20T16:47:15Z
dc.date.issued2001
dc.description.abstractThe Aguablanca Cu–Ni orthomagmatic ore deposit is hosted by mafic and ultramafic rocks of the Aguablanca stock, which is part of the larger, high-K calc-alkaline Santa Olalla plutonic complex. This intrusive complex, ca. 338 Ma in age, is located in the Ossa-Morena Zone (OMZ) of the Iberian Variscan Belt. Mineralization consists mainly of pyrrhotite, pentlandite and chalcopyrite resulting from the crystallization of an immiscible sulphide-rich liquid. Isotope work on the host igneous rocks (Sr, Nd) and the ore (S) suggests that contamination with an upper-crustal component took place at some depth before final emplacement of the plutons (εNd338= -6 to -7.5; Sr(338)=0.7082 to 0.7100; δ34(sulphides) near + 7.4‰). Assimilation–fractional crystallization (AFC) processes are invoked to explain early cumulates and immiscible sulphide-magma formation. Intrusion took place at the beginning of the type-A oblique subduction of the South Portuguese Zone under the Ossa-Morena Zone and was probably driven by transpressive structures (strike-slip faults). The mineralization is thus synorogenic. Aguablanca is probably the first case referred to in the literature of a magmatic Cu–Ni ore deposit hosted by calc-alkaline igneous rocks.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/12147
dc.identifier.doiPII: S0169-1368Ž01.00033-6
dc.identifier.issn0169-1368
dc.identifier.officialurlhttp://www.elsevier.com/locate/oregeorev
dc.identifier.urihttps://hdl.handle.net/20.500.14352/56996
dc.journal.titleOre geology reviews
dc.language.isoeng
dc.page.final250
dc.page.initial237
dc.publisherElsevier Science B.V., Amsterdam
dc.rights.accessRightsopen access
dc.subject.cdu553.4(460.253)
dc.subject.keywordCu–Ni ores
dc.subject.keywordCalc-alkaline magmatism
dc.subject.keywordIsotope geochemistry
dc.subject.keywordVariscan orogeny
dc.subject.keywordSpain
dc.subject.ucmPetrología
dc.titleThe Aguablanca Cu–Ni ore deposit (Extremadura, Spain), a case of synorogenic orthomagmatic mineralization: age and isotope composition of magmas (Sr, Nd) and ore (S)
dc.typejournal article
dc.volume.number18
dspace.entity.typePublication
relation.isAuthorOfPublicationa4fea134-2fb2-4157-9dd1-a3d6002ba005
relation.isAuthorOfPublicationf2fb71b6-b7fd-4fc6-bf39-d4de3ba5a67c
relation.isAuthorOfPublication.latestForDiscoverya4fea134-2fb2-4157-9dd1-a3d6002ba005
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