Search Results - "Neiva, A.M.R"

Uranium and arsenic contamination in the former Mondego Sul uranium mine area, Central Portugal by Neiva, A.M.R., Antunes, I.M.H.R., Carvalho, P.C.S., Santos, A.C.T.

“…The abandoned Mondego Sul uranium mine exploited quartz veins containing sulfides, torbernite, meta-uranocircite, saleeite, meta-saleeite and Fe-oxides and…”
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Contaminated water, stream sediments and soils close to the abandoned Pinhal do Souto uranium mine, central Portugal by Neiva, A.M.R., Carvalho, P.C.S., Antunes, I.M.H.R., Silva, M.M.V.G., Santos, A.C.T., Cabral Pinto, M.M.S., Cunha, P.P.

“…The Pinhal do Souto mine exploited a quartz vein containing uranium minerals, mainly autunite and torbernite. This vein intersects a two-mica granite…”
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Combined U–Pb geochronology and Lu–Hf isotope systematics by LAM–ICPMS of zircons from granites and metasedimentary rocks of Carrazeda de Ansiães and Sabugal areas, Portugal, to constrain granite sources by Teixeira, R.J.S., Neiva, A.M.R., Silva, P.B., Gomes, M.E.P., Andersen, T., Ramos, J.M.F.

“…The Carrazeda de Ansiães and Sabugal areas in the Central Iberian Zone of the Iberian Variscan Belt contain abundant S-type granites formed during the…”
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The mineralized veins and the impact of old mine workings on the environment at Segura, central Portugal by Antunes, I.M.H.R, Neiva, A.M.R, Silva, M.M.V.G

“…At Segura, granitic pegmatite veins with cassiterite and lepidolite, hydrothermal Sn–W quartz veins and Ba–Pb–Zn quartz veins intruded the Cambrian…”
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Portuguese granites associated with Sn-W and Au mineralizations by Neiva, A.M.R.

“…In northern and central Portugal, there are different tin-bearing granites. Most of them are of S-type, others have mixed characteristics of I-type and S-type…”
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Corrigendum to “Evolution of a Neoproterozoic suture in the Iberian Massif, Central Portugal: New U-Pb ages of igneous and metamorphic events at the contact between the Ossa Morena Zone and Central Iberian Zone” [Lithos 220–223 (2015) 43–59] by Henriques, S.B.A., Neiva, A.M.R., Ribeiro, M.L., Dunning, G.R., Tajčmanová, L.

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The importance of sequential partial melting and fractional crystallization in the generation of syn-[D.sub.3] Variscan two-mica granites from the Carrazeda de Ansiâes area, northern Portugal/Importancia de la fusión parcial secuencial y de la cristalización fraccionada en la formación de granitos variscos sin-[D.sub.3] de dos micas en la región de Carrazeda de Ansiães, norte de Portugal by Teixeira, R.J.S, Neiva, A.M.R, Gomes, M.E.P, Corfu, F, Cuesta, A, Croudace, I.W

“…In the Carrazeda de Ansiães region, northern Portugal, a mesozonal granitic suite intruded Precambrian to Ordovician me sedimentary rocks during the late…”
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Evolution of a Neoproterozoic suture in the Iberian Massif, Central Portugal: New U-Pb ages of igneous and metamorphic events at the contact between the Ossa Morena Zone and Central Iberian Zone by Henriques, S.B.A., Neiva, A.M.R., Ribeiro, M.L., Dunning, G.R., Tajčmanová, L.

“…A Neoproterozoic suture is exposed at the contact between the Ossa Morena Zone and the Central Iberian Zone, in the Iberian Massif (Central Portugal), the…”
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Cadomian magmatism and metamorphism at the Ossa Morena/Central Iberian zone boundary, Iberian Massif, Central Portugal: Geochemistry and P–T constraints of the Sardoal Complex by Henriques, S.B.A., Neiva, A.M.R., Tajčmanová, L., Dunning, G.R.

“…A well preserved Cadomian basement is exposed in the Iberian Massif, Central Portugal, at the Ossa Morena/Central Iberian zone boundary, which allows the…”
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Assessment of metal and metalloid contamination in the waters and stream sediments around the abandoned uranium mine area from Mortórios, central Portugal by Neiva, A.M.R., Carvalho, P.C.S., Antunes, I.M.H.R., Albuquerque, M.T.D., Santos, A.C.S., Cunha, P.P., Henriques, S.B.A.

“…In the abandoned Mortórios uranium mine area there are quartz veins containing wolframite and sulphides and basic rock dykes with torbernite and autunite…”
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Potential risk assessment in stream sediments, soils and waters after remediation in an abandoned W>Sn mine (NE Portugal) by Antunes, I.M.H.R., Gomes, M.E.P., Neiva, A.M.R., Carvalho, P.C.S., Santos, A.C.T.

“…The mining complex of Murçós belongs to the Terras de Cavaleiros Geopark, located in Trás-os-Montes region, northeast Portugal. A stockwork of NW-SE-trending…”
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Assessment of metal and metalloid contamination in soils trough compositional data: the old Mortórios uranium mine area, central Portugal by Neiva, A. M. R., Albuquerque, M. T. D., Antunes, I. M. H. R., Carvalho, P. C. S., Santos, A. C. T., Boente, C., Cunha, P. P., Henriques, S. B. A., Pato, R. L.

“…Soils from the old Mortórios uranium mine area were studied to look for contamination, as they are close to two villages, up to 3 km away, and used for…”
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U–Pb and 39Ar/40Ar data constraining the ages of the source, emplacement and recrystallization/cooling events from late- to post-D3 Variscan granites of the Gouveia area, central Portugal by Neiva, A.M.R., Williams, I.S., Lima, S.M., Teixeira, R.J.S.

“…Late Carboniferous U–Pb ages have been measured on igneous zircon from late- and post-D3 Sn-bearing two-mica granites from the Gouveia area in the Central…”
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Distinct sources for syntectonic Variscan granitoids: Insights from the Aguiar da Beira region, Central Portugal by Costa, M.M., Neiva, A.M.R., Azevedo, M.R., Corfu, F.

“…The Variscan syntectonic granitoid plutons from the Aguiar da Beira region (central Portugal) were emplaced into metasediments of Late Proterozoic–Early…”
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Geochemistry and metamorphism of the Mouriscas Complex, Ossa-Morena/Central Iberian zone boundary, Iberian Massif, Central Portugal: Implications for the Cadomian and Variscan orogenies by Henriques, S.B.A., Neiva, A.M.R., Tajčmanová, L., Dunning, G.R.

“…The Mouriscas Complex is a deformed and metamorphosed predominantly mafic igneous complex of Ediacaran and Ordovician age and crops out at the…”
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Geochemical and isotopic constraints on the petrogenesis of Early Ordovician granodiorite and Variscan two-mica granites from the Gouveia area, central Portugal by Neiva, A.M.R., Williams, I.S., Ramos, J.M.F., Gomes, M.E.P., Silva, M.M.V.G., Antunes, I.M.H.R.

“…A biotite granodiorite and seven Sn-bearing two-mica granites crop out in the Gouveia area, central Portugal. A SHRIMP U–Th–Pb zircon age from the…”
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New insights from U–Pb zircon dating of Early Ordovician magmatism on the northern Gondwana margin: The Urra Formation (SW Iberian Massif, Portugal) by Solá, A.R., Pereira, M.F., Williams, I.S., Ribeiro, M.L., Neiva, A.M.R., Montero, P., Bea, F., Zinger, T.

“…The Central Iberian–Ossa-Morena transition zone (SW Iberian Massif) represents a segment of the northern Gondwana margin with a long geodynamic evolution,…”
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The importance of sequential partial melting and fractional crystallization in the generation of syn-D3 Variscan two-mica granites from the Carrazeda de Ansiães area, northern Portugal by Teixeira, R. J. S., Neiva, A. M. R., Gomes, M. E. P., Corfu, F., Cuesta, A., Croudace, I. W.

“…In the Carrazeda de Ansiães region, northern Portugal, a mesozonal granitic suite intruded Precambrian to Ordovician metasedimentary rocks during the late…”
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The genesis of I- and S-type granitoid rocks of the Early Ordovician Oledo pluton, Central Iberian Zone (central Portugal) by Antunes, I.M.H.R., Neiva, A.M.R., Silva, M.M.V.G., Corfu, F.

“…The Early Ordovician Oledo pluton consists of four distinct granodioritic to granitic phase (G1–G4), which intruded a Cambrian schist-metagraywacke complex,…”
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The role of fractional crystallization in the genesis of early syn-D3, tin-mineralized Variscan two-mica granites from the Carrazeda de Ansiães area, northern Portugal by Teixeira, R.J.S., Neiva, A.M.R., Gomes, M.E.P., Corfu, F., Cuesta, A., Croudace, I.W.

“…A multiphase granitic complex (G1–G6) in the Carrazeda de Ansiães area, Central Iberian Zone, was emplaced during syn-kinematic stages of the Variscan orogeny,…”
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