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)
dc.contributor.author | Casquet Martín, César | |
dc.contributor.author | Galindo Francisco, María Del Carmen | |
dc.contributor.author | Tornos Arroyo, Fernando | |
dc.contributor.author | Velasco Roldán, Francisco | |
dc.contributor.author | Canales Gallarosa, Ángel | |
dc.date.accessioned | 2023-06-20T16:47:15Z | |
dc.date.available | 2023-06-20T16:47:15Z | |
dc.date.issued | 2001 | |
dc.description.abstract | The 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.department | Depto. de Mineralogía y Petrología | |
dc.description.faculty | Fac. de Ciencias Geológicas | |
dc.description.refereed | TRUE | |
dc.description.status | pub | |
dc.eprint.id | https://eprints.ucm.es/id/eprint/12147 | |
dc.identifier.doi | PII: S0169-1368Ž01.00033-6 | |
dc.identifier.issn | 0169-1368 | |
dc.identifier.officialurl | http://www.elsevier.com/locate/oregeorev | |
dc.identifier.uri | https://hdl.handle.net/20.500.14352/56996 | |
dc.journal.title | Ore geology reviews | |
dc.language.iso | eng | |
dc.page.final | 250 | |
dc.page.initial | 237 | |
dc.publisher | Elsevier Science B.V., Amsterdam | |
dc.rights.accessRights | open access | |
dc.subject.cdu | 553.4(460.253) | |
dc.subject.keyword | Cu–Ni ores | |
dc.subject.keyword | Calc-alkaline magmatism | |
dc.subject.keyword | Isotope geochemistry | |
dc.subject.keyword | Variscan orogeny | |
dc.subject.keyword | Spain | |
dc.subject.ucm | Petrología | |
dc.title | 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) | |
dc.type | journal article | |
dc.volume.number | 18 | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | a4fea134-2fb2-4157-9dd1-a3d6002ba005 | |
relation.isAuthorOfPublication | f2fb71b6-b7fd-4fc6-bf39-d4de3ba5a67c | |
relation.isAuthorOfPublication.latestForDiscovery | a4fea134-2fb2-4157-9dd1-a3d6002ba005 |
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