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Modelización magnética del Complejo de Cunene (SW Angola) [Resumo]

2024-07Conference object Open access
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dc.contributor.authorMochales, Tania
dc.contributor.authorMerino-Martínez, E.
dc.contributor.authorRey-Moral, Carmen
dc.contributor.authorMachadinho, Ana
dc.contributor.authorCarvalho, João
dc.contributor.authorRepresas, Patricia
dc.contributor.authorGarcía-Lobón, J. L.
dc.contributor.authorFeria, María Carmen
dc.contributor.authorMartín-Banda, Raquel
dc.contributor.authorLópez-Bahut, T.
dc.contributor.authorAlves, Daniela
dc.contributor.authorRamalho, Elsa
dc.contributor.authorManuel, José
dc.contributor.authorCordeiro, Domingos
dc.date.accessioned2025-01-24T13:50:22Z
dc.date.available2025-01-24T13:50:22Z
dc.date.issued2024-07
dc.description.abstractRESUMEN: El Complejo de Cunene (CC) representa un extenso macizo ígneo mesoproterozoico compuesto por rocas anortosíticas, gabroicas y ácidas contemporáneas, que aflora 18.000 km2 en dirección NNE-SSW desde el SW de Angola al NW de Namibia. Se han interpretado y modelizado en 2,5/3D los datos aerogeofísicos obtenidos en el proyecto PLANAGEO para investigar los límites no expuestos del CC, reconstruyendo la estructura de la corteza superficial bajo la cobertera del Kalahari. Gracias a la modelización se descifra una geometría lobular cuya extensión es casi tres veces la superficie aflorante y superior a la estimada mediante gravimetría (45.000 km2; Rey-Moral et al., 2022). Las anomalías magnéticas identificadas definen cuerpos individuales que conforman diversos pulsos magmáticos coalescentes durante el Mesoproterozoico. Las lineaciones magnéticas indican grandes sistemas de cizallamiento desarrollados en varias fases intrusivas en un contexto colisional de arco. Los lineamientos magnéticos al E sugieren un emplazamiento asociado a etapas transtensivas. Al W, con los pulsos más jóvenes, se detectan lineamientos en un régimen contraccional complejo. Estructuras tardías NNW-SSE extensionales, involucran magmas mantélicos y cuencas mesoproterozoicas tardías (<1,33 Ga).pt_PT
dc.description.abstractABSTRACT: The Kunene Complex (KC) is an extensive Mesoproterozoic igneous massif composed of anorthositic, gabbroic and contemporaneous acid rocks. Its outcrops extend over 18,000 km2 in a NNESSW direction from SW Angola to NW Namibia. Aerogeophysical data obtained within the PLANAGEO project have been interpreted and modelled in 2.5D and 3D to investigate the concealed boundaries of the KC and to reconstruct the structure of the surface crust beneath the Kalahari cover. The modelling reveals a lobular geometry with an extension of almost three times the outcropping area, even larger than estimated by gravimetry (45,000 km2; Rey-Moral et al., 2022). The magnetic anomalies identified define individual bodies that formed several coalescent magmatic pulses during the Mesoproterozoic. Magnetic lineaments indicate large shear systems developed in various intrusive phases in a collisional arc context. Magnetic lineaments to the east suggest an emplacement associated with transtensive stages. To the W, with the most recent pulses, lineaments in a complex contractional regime are detected. Late NNW-SSE extensional structures involve mantle magmas and late-Mesoproterozoic basins (<1.33 Ga).pt_PT
dc.description.versionN/Apt_PT
dc.identifier.citationMochales, T., Merino-Martínez, E., Rey-Moral, C., Machadinho, A., Carvalho, J., Represas, P., García-Lobón, J.L., Feria, M.C., Martín-Banda, R., López-Bahut, M.T., Alves, D., Ramalho, E.C., Manuel, J. & Cordeiro, D. (2024) Modelización magnética del Complejo de Cunene (SW Angola). In: Geo-Temas, vol. 20, XI Congresso Geológico de España, Ávila, España, 2-6 July, 2024, p. 1355pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.9/4454
dc.language.isospapt_PT
dc.peerreviewednopt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMagnetic modellingpt_PT
dc.subjectKunene complexpt_PT
dc.subjectAngola (Southwest)pt_PT
dc.titleModelización magnética del Complejo de Cunene (SW Angola) [Resumo]pt_PT
dc.title.alternativeMagnetic modelling of the Kunene Complex (SW Angola)pt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceÁvila, Españapt_PT
oaire.citation.startPage1355pt_PT
oaire.citation.titleXI Congresso Geológico de Españapt_PT
person.familyNameMachadinho
person.familyNameCarvalho
person.familyNameMACHADO MADUREIRA FONTES REPRESAS
person.familyNameRamalho
person.givenNameAna
person.givenNameJoão
person.givenNamePATRÍCIA
person.givenNameElsa
person.identifierA-8080-2008
person.identifier.ciencia-idFF17-D4F9-4315
person.identifier.ciencia-id1D16-E24A-F4E4
person.identifier.ciencia-id901F-FDE9-581F
person.identifier.ciencia-idC516-4C8B-2F41
person.identifier.orcid0000-0003-1323-217X
person.identifier.orcid0000-0003-2227-3918
person.identifier.orcid0000-0002-2987-2836
person.identifier.orcid0000-0002-9268-271X
person.identifier.scopus-author-id56638554400
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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