Geology of the Rosário–Neves Corvo antiform, Iberian Pyrite Belt, Portugal: new insights from physical volcanology, palynostratigraphy and isotope geochronology studies

Oliveira, José Tomás; Rosa, Carlos J. P.; Pereira, Zélia; Rosa, Diogo R. N.; Matos, João Xavier; Inverno, Carlos; Andersen, Tom

doi:10.1007/s00126-012-0453-0

Cited by 42 publications

(35 citation statements)

References 30 publications

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“…The black shales contain palynomorphs of lower Visean age (Oliveira et al 2004). The recently mapped-150 m thick-Ribeira de Cobres Fm (Oliveira et al 2013), with shales, siltstones and fine volcaniclastic rocks, may represent a lateral facies variation of the Graça Fm. Above the Godinho Fm dark shales and thin-bedded greywackes of the Brancanes Formation that make the transition to the Mértola Fm flysch turbidites (Mt1) occur.…”

Section: Introductionmentioning

confidence: 93%

“…Recent U-Pb dating of zircons recovered from felsic rocks in the SE region of the Neves CorvoRosario antiform indicated five episodes of felsic volcanism at 384, 373, 365, 359 and 354 Ma respectively (Oliveira et al 2013). This indicates that a high heat flow was operative for 30 Ma and may have had an important role in the formation of convective cells that lead to the genesis of the massive sulphides.…”

Section: Introductionmentioning

confidence: 97%

“…Mapping carried out in the larger Neves Corvo mine region (Leca et al 1983) complemented by logging of dozens of drill cores by mine geologists, palynostratigraphic research (Oliveira et al 1997;Pereira et al 2003;Oliveira et al 2004) and recent research on the SE part of the Neves Corvo-Rosário antiform (Rosa et al 2008;Oliveira et al 2013) identified the regional stratigraphic sequence described below.…”

Section: Introductionmentioning

confidence: 99%

“…The unit's thickness as a whole is in excess of 100 m (base not seen). Palynomorphs indicate a late Famennian age for the Barrancão member and a Strunian (latest Famennian) age for the PhylliteQuartzite Fm (Oliveira et al 2004(Oliveira et al , 2006(Oliveira et al , 2013Pereira et al 2008). At the Monte Forno da Cal farm and at depth, the top of the Phyllite-Quartzite Group is overlain by a tens of meters thick shale band with interbedded limestone lenses and nodules.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of the Neves Corvo Area

Inverno

Rosa

Matos

et al. 2015

Mineral Resource Reviews

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Abstract3D, 4D and predictive geological modelling, including all known geoscientific data, were applied to the 100 × 25 km large Neves Corvo project area located in the Portuguese part of the Iberian Pyrite Belt. The lowermost unit in the area is the Givetian to Famennian-Strunian PhylliteQuartzite Group (PQG), which is overlain by three SE-plunging volcanic axes with the Strunian to Visean Volcanic Sedimentary Complex (VSC), hosting in its lower sequence the Neves Corvo VHMS giant deposit. The VSC is covered with mid late Visean and Serpukhovian to Bashkirian flysch rocks [Mértola and Mira formations of the Baixo Alentejo Flysch Group (BAFG), respectively]. Six NE-SW deep 2D reflection seismic profiles acquired by LNEG between Neves Corvo mine and the Spanish border (60 km to the SE) during the ProMine project, allowed to extend a 3D-model of the Neves Corvo main thrust (that brings VSC rocks onto Mértola Fm. very close to VHMS ores) throughout the eastern part of the area. NE-SW to ENE-WSW (sinistral) and N-S to NNW-SSE (dextral) late Variscan strike-slip oblique faults (a few >5 km deep) displaced all former geological units and structures, as shown by the 3D models. In late Variscan time, small vein-type Cu (and other metals) deposits were emplaced along them.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling of the Neves Corvo Area

Inverno

Rosa

Matos

et al. 2015

Mineral Resource Reviews

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“…The IPB is a metallogenetic province about 250-km long and 20-70 km wide (Oliveira et al 2013), located in the SW part of the Iberian Peninsula, between Seville (Andalusia, Spain) and Marateca (Alentejo, Portugal). It is one of the most important volcanogenic massive sulfide districts in the world and its mining history dates back to 5,000 years.…”

Section: Regional Geologymentioning

confidence: 99%

Combined study of mineral deposits and deep geothermal for energy production or urban heating – Comparison between the Portuguese (Neves-Corvo) and the Hungarian (Recsk) case studies

Sas

Osvald

Ramalho

et al. 2018

Central European Geology

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Energy and metals are essential resources in the 21st century and with the economic and technical development are more and more required. The fulfilling of these requirements leads to the need to produce both more ore and energy. Considering these goals, the project CHPM2030 ("Combined Heat, Power and Metal extraction") was launched in January 2016, focused on the characterization of European mining regions that can be linked to both metal extraction and renewable energy production. The aim of this project is to convert ultra-deep metallic mineral formations into an "orebody-enhanced geothermal system" to coproduce energy and metals. This study will focus on two mining areas (Recsk in Hungary and Neves-Corvo in Portugal), considered CHPM2030 case studies, comparing them regarding mineral (ore) and geothermal potential in terms of heat-flow density values and their implication in temperatures in depth estimations. Especially, when it concerns geothermal energy, the surface demand is an important factor to consider, so wider studies are required.

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Maiaspora: the hallmark of gleichenioid ferns (Gleicheniales) from the early Carboniferous

Mamontov,

McLean,

Gavrilova

2024

Papers in Palaeontology

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The Palaeozoic origin of gleichenioid ferns (Gleicheniales) has aroused curiosity for almost a century. The oldest definite sign of this ancient clade is the spore wall ultrastructure of Radiitheca dobranyana from the Moscovian of central Europe. However, familial assignment of this fern fossil is uncertain. A comparison of its in situ spores with those of the dispersed genus Maiaspora, from the Visean, suggests that they may represent the same group of leptosporangiates. Although these spores have a common metareticuloid sculpture, the ultra‐thin structure of the dispersed counterparts remained unknown. Study of the ultrastructure of Maiaspora concava and M. panopta from central Russia and Northumberland (UK) using transmission electron microscopy shows that the wall of Maiaspora has a middle exospore layer composed of foliated lamellae. These spread from the base of the aperture slit to the subequatorial margins of kyrtome areas. The lamellae do not overlap the aperture slit and terminate at between two‐thirds and three‐quarters of the slit height. The miospores have a three‐layered exospore in the interradial areas, while non‐apertural parts of the exospore consist of two layers. Such an ultrastructure is shared by extant Gleicheniales and fossil R. dobranyana. The combined evidence from the morphology, ultrastructure and spatiotemporal distribution of Maiaspora, as well as radioisotope dating and additional plant macrofossils, suggests that the origin of the Gleicheniales stem was related to closure of the Rheic Ocean. Apparently, the first Maiaspora‐producing gleichenioids emerged as neoendemic terrestrial ferns on the peri‐Gondwanan volcanic arcs.

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Geology of the Rosário–Neves Corvo antiform, Iberian Pyrite Belt, Portugal: new insights from physical volcanology, palynostratigraphy and isotope geochronology studies

Cited by 42 publications

References 30 publications

Modelling of the Neves Corvo Area

Modelling of the Neves Corvo Area

Combined study of mineral deposits and deep geothermal for energy production or urban heating – Comparison between the Portuguese (Neves-Corvo) and the Hungarian (Recsk) case studies

Maiaspora: the hallmark of gleichenioid ferns (Gleicheniales) from the early Carboniferous

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