17 documents found, page 1 of 2
Late Famennian (latest Strunian) palynomorph assemblages and their role in the ...
Mendes, Márcia; Pereira, Zélia; Matos, João Xavier; Albardeiro, Luis; Morais, Igor; Araújo, VitorABSTRACT: This research examines palynomorph assemblages preserved in sediments of the Iberian Pyrite Belt (IPB) that host the Neves-Corvo massive sulfide deposit and its importance for mineral exploration. The sediments belong to the Neves Formation, characterized by black shales and minor occurrences of siltstones and cherts, indicative of reduced environmental conditions, favorable to sulfide deposition in a...
A new approach to palynostratigraphy of the middle–late Famennian Gafo Formatio...
Mendes, Márcia; Pereira, Zélia; Vaz, Nuno; Díez-Montes, Alejandro; Matos, João X.; Albardeiro, Luis; Manuel Carvalho Fernandes, Paulo; Jorge, RaulNew palynological results from the Gafo Formation (southern sector of the Pulo do Lobo Domain, South Portuguese Zone) are integrated with recently studied sections and drillholes from the Portuguese and Spanish sectors. A total of 44 samples were studied, 27 of which were positive for palynomorph taxonomy. This research revealed well preserved palynological assemblages, including 73 spore species allocated to 2...
Proyecto GEO_FPI, cartografía de la Zona Surportuguesa (ZSP). Datos preliminare...
Díez-Montes, Alejandro; Matos, João Xavier; Valverde-Vaquero, Pablo; Solá, A. Rita; Beranoaguirre, Aratz; Albardeiro, Luis; Salgueiro, RuteRESUMEN: La ZSP es la unidad geotectónica más al suroeste del Orógeno Varisco y se consideran los siguientes dominios: Pulo do Lobo (Frasniense inferior y Fameniense superior), Faja Pirítica Ibérica (Givetiense-Viseense superior), Grupo Flysch Baixo Alen tejo (Viseense superior-Moscoviense superior) y Grupo Suroeste (Estruniense-Bashkiriense medio). En el proyecto GEO_FPI se ha prestado especial atención a la F...
Geology of the recently discovered massive and stockwork sulphide mineralizatio...
Pereira, Zélia; Matos, João Xavier; Solá, A. Rita; Batista, Maria Joao; Salgueiro, Rute; Rosa, Carlos J. P.; Albardeiro, Luis; Mendes, MárciaABSTRACT: The recently discovered massive and stockwork sulphide mineralization of Semblana-Rosa Magra and Monte Branco, situated ESE of the Neves–Corvo volcanogenic massive sulphide (VMS) deposit in the Iberian Pyrite Belt (IPB) is presented. Geological setting and tectonic model is discussed based on proxies such as palynostratigraphy and U–Pb zircon geochronology. The mineralization is found within the IPB V...
Geology of the recently discovered massive and stockwork sulphide mineralizatio...
Pereira, Zélia; Matos, João Xavier; Solá, A. Rita; Batista, Maria Joao; Salgueiro, Rute; Rosa, Carlos; Albardeiro, Luis; Mendes, Márcia; Morais, IgorAbstract The recently discovered massive and stockwork sulphide mineralization of Semblana-Rosa Magra and Monte Branco, situated ESE of the Neves–Corvo volcanogenic massive sulphide (VMS) deposit in the Iberian Pyrite Belt (IPB) is presented. Geological setting and tectonic model is discussed based on proxies such as palynostratigraphy and U–Pb zircon geochronology. The mineralization is found within the IPB Vo...
Proyecto GEO_FPI, cartografía de la Zona Surportuguesa (ZSP). Datos preliminare...
Díez-Montes, Alejandro; Matos, João Xavier; Valverde-Vaquero, Pablo; Solá, A. Rita; Beranoaguirre, Aratz; Albardeiro, Luis; Salgueiro, RuteRESUMEN: La ZSP es la unidad geotectónica más al suroeste del Orógeno Varisco y se consideran los siguientes dominios: Pulo do Lobo (Frasniense inferior y Fameniense superior), Faja Pirítica Ibérica (Givetiense-Viseense superior), Grupo Flysch Baixo Alen tejo (Viseense superior-Moscoviense superior) y Grupo Suroeste (Estruniense-Bashkiriense medio). En el proyecto GEO_FPI se ha prestado especial atención a la F...
A drill‑hole, geological and geophysical data‑based 3D model for target generat...
Carvalho, João; Dias, Pedro; Revaux, Charles; Matos, João Xavier; Araújo, Vítor; Inverno, Carlos; Marques, Fábio; Donoso, George; Pacheco, NelsonABSTRACT: The Neves-Corvo world class Iberian Pyrite Belt volcanogenic massive sulphide (VMS) deposit located in southern Portugal, constitutes an important Cu–Zn–Pb active mine. Seven deposits are currently known, among which the Lombador deposit alone has estimated 150 Mt of massive sulphides. The life-time of the mine is dependent on the discovery of new exploration targets and it is vital to have accurate 3...
Mineral Inventory of the Algares 30-Level Adit, Aljustrel Mine, Iberian Pyrite ...
Silva, Teresa; Matos, João Xavier; de Oliveira, Daniel Pipa Soares; Veiga, JP; Morais, Igor; Gonçalves, Pedro; Albardeiro, LuisABSTRACT: Mining activity in Algares (Aljustrel Mine, Portuguese sector of the Iberian Pyrite Belt, IPB) stems prior to Roman times. As the orebody is vertical and relatively thin, mining was carried out mainly along underground adits (galleries). Nowadays, the deposit is considered exhausted and the area is being rehabilitated for a different use. The Algares +30 level adit intersects two volcanic units of the...
New insights on the middle Givetian/middle Frasnian palynofloras from the Phyll...
Mendes, Márcia; Pereira, Zélia; Matos, João Xavier; Albardeiro, Luis; Morais, Igor; Solá, A. Rita; Salgueiro, Rute; Pacheco, Nelson; Araújo, VítorABSTRACT: A detailed palynostratigraphic study of two Somincor/Lundin Mining exploration drill holes intercepting the Phyllite-Quartzite (PQ) Formation in the geological basement of the Neves-Corvo mine region (Portuguese sector of the Iberian Pyrite Belt – IPB) allowed to first recognise the oldest ages for this formation in this region, ranging from midGivetian/midFrasnian (base unknown) to late Famennian. Th...
Provenance of Holocene beach sand in the Western Iberian
Pereira, M. Francisco; Albardeiro, Luis; Gama, Cristina; Chichorro, Martim; Hofman, Mandy; Linnemann, UlfDetrital zircons from Holocene beach sand and igneous zircons from the Cretaceous syenite forming Cape Sines (Western Iberian margin) were dated using laser ablation – inductively coupled plasma – mass spectrometry. The U–Pb ages obtained were used for comparison with previous radiometric data from Carboniferous greywacke, Pliocene–Pleistocene sand and Cretaceous syenite forming the sea cliff at Cape Sines and ...