Search Results - "Hollanda, Maria Helena Bezerra"

Late Ediacaran lateral-escape tectonics as recorded by the Patos shear zone (Borborema Province, NE Brazil) by Archanjo, Carlos José, Hollanda, Maria Helena Bezerra Maia de, Viegas, Luis Gustavo Ferreira

“…Abstract Lateral escape tectonics mediated by strike-slip fault zones are an efficient mechanism of rock deformation in the continental crust of collision…”
Get full text

Petrology of continental tholeiitic magmas forming a 350-km-long Mesozoic dyke swarm in NE Brazil: Constraints of geochemical and isotopic data by Ngonge, Emmanuel Donald, de Hollanda, Maria Helena Bezerra Maia, Archanjo, Carlos José, de Oliveira, Diógenes Custódio, Vasconcelos, Paulo Marcosde Paula, Muñoz, Patrício Rodrigo Montecinos

“…The Ceará Mirim dyke swarm (northeastern Brazil) is composed of Cretaceous tholeiites with plagioclase, clinopyroxene (±olivine), Fe-Ti oxides and pigeonite in…”
Get full text

Upper Cretaceous weakly to strongly silica-undersaturated alkaline dike series of the Mantiqueira Range, Serra do Mar alkaline province: Crustal assimilation processes and mantle source signatures by Azzone, Rogério Guitarrari, Ruberti, Excelso, Silva, Júlio César Lopes da, Gomes, Celso de Barros, Rojas, Gaston Eduardo Enrich, Hollanda, Maria Helena Bezerra Maia de, Tassinari, Colombo Celso Gaeta

“…Three series of alkaline dikes are characterized in a restricted area of the Mantiqueira Range: a weakly silica-undersaturated series (normative ne < 7), of…”
Get full text

Dating coeval mafic magmatism and ultrahigh temperature metamorphism in the Anápolis–Itauçu Complex, Central Brazil by Giustina, Maria Emilia Schutesky Della, Pimentel, Márcio Martins, Ferreira Filho, Cesar Fonseca, de Hollanda, Maria Helena Bezerra Maia

“…Dating granulites has always been of great interest because they represent one of the most extreme settings of an orogen. Owing to the resilience of zircon,…”
Get full text

Contribution of SHRIMP U–Pb zircon geochronology to unravelling the evolution of Brazilian Neoproterozoic fold belts by Basei, Miguel Angelo Stipp, Neves, Benjamim Bley Brito, Siga, Oswaldo, Babinski, Marly, Pimentel, Marcio Martins, Gaeta Tassinari, Colombo Celso, Hollanda, Maria Helena Bezerra, Nutman, Allen, Cordani, Umberto Giuseppe

“…The South-American continent is constituted of three major geologic–geotectonic entities: the homonym platform (consolidated at the end of the Cambrian), the…”
Get full text

Carbon isotope variations of high magnitude recorded in carbonate rocks from the Stenian-Tonian Lajeado Group, Southeast Brazil by Paula-Santos, Gustavo Macedo, Campanha, Ginaldo Ademar da Cruz, Faleiros, Frederico Meira, Hollanda, Maria Helena Bezerra Maia, Rodrigues, Sérgio Wilians de Oliveira

“…The Lajeado Group is a Stenian-Tonian metasedimentary unit comprising a thick carbonate succession that was involved in the Brasiliano – Pan-African Ribeira…”
Get full text

Mesozoic dike swarms in Borborema Province (NE Brazil): A structural analysis based on airborne geophysical data and field work by Costa de Melo, Alanny Christiny, Lopes de Castro, David, Custódio de Oliveira, Diógenes, Bezerra Maia de Hollanda, Maria Helena

“…Mapping and analysis of dike swarms support a detailed understanding of the orientation, geometry, spatial distribution, geochronology, emplacement mechanism,…”
Get full text

Characteristics of the lithospheric mantle beneath northeastern Borborema Province, Brazil: Re–Os and HSE constraints on peridotite xenoliths by Ngonge, Emmanuel Donald, de Hollanda, Maria Helena Bezerra Maia, Puchtel, Igor S., Walker, Richard J., Archanjo, Carlos José

“…The northeastern part of the Borborema Province, NE Brazil is noteworthy for its history of crust formation from the Archean to Cenozoic, which certainly…”
Get full text

Petrology of the alkaline rocks of the Macau Volcanic Field, NE Brazil by Ngonge, Emmanuel Donald, de Hollanda, Maria Helena Bezerra Maia, Pimentel, Márcio Martins, de Oliveira, Diógenes Custódio

“…The Macau Volcanic Field (MVF) in the Borborema Province, NE Brazil, contains multiple centres of volcanic activity of Early to Late Cenozoic ages. We present…”
Get full text

Electron microprobe dating of monazite from high- T shear zones in the São José de Campestre Massif, NE Brazil by de Souza, Zorano Sérgio, Montel, Jean-Marc, Gioia, Simone Maria Lima Costa, Maia de Hollanda, Maria Helena Bezerra, Leite do Nascimento, Marcos Antonio, Jardim de Sá, Emanuel Ferraz, Amaro, Venerando Eustáquio, Pimentel, Márcio Martins, Lardeaux, Jean-Marc, Veschambre, Michelle

“…The easternmost domain of the Borborema Province, northeastern Brazil, presents widespread, extensional-related high-temperature metamorphism during the…”
Get full text

Lithosphere–asthenosphere interaction and the origin of Cretaceous tholeiitic magmatism in Northeastern Brazil: Sr–Nd–Pb isotopic evidence by Hollanda, Maria Helena Bezerra Maia, Pimentel, Márcio Martins, Oliveira, Diógenes Custódio, de Sá, Emanuel Ferraz Jardim

“…Rio Ceará-Mirim Swarm forms a 400 km long, mainly E–W trending dykes which have been emplaced in Northeastern Brazil during the opening of South and Equatorial…”
Get full text

Geologia e caracterização química do magmatismo peralcalino ultrapotássico do enxame de diques Manaíra-Princesa Isabel, Província Borborema by Hollanda, Maria Helena Bezerra Maia de, Pelaéz Mejía, Carolina, Archanjo, Carlos José, Armstrong, Richard

“…O enxame de diques ácidos da região de Manaíra-Princesa Isabel aflora no estado da Paraíba, geologicamente inserido no domínio Alto Pajeú da Zona Transversal…”
Get full text

Titanite: A source, thermodynamic, and temporal proxy for W-Mo-Cu Skarn mineralization at the Seridó Mineral Province, Northeastern Brazil by Tavares, Caio de Freitas, Hollanda, Maria Helena Bezerra Maia

“…New zircon U-Pb geochronology (SHRIMP) and geochemistry combined with geochronology (LA-ICP-MS) of titanite data are provided to investigate the metallic…”
Get full text

Slow cooling and crystallization of the roots of the Neoproterozoic Araçuaí hot orogen (SE Brazil): Implications for rheology, strain distribution, and deformation analysis by Vauchez, Alain, Hollanda, Maria Helena B.M., Monié, Patrick, Mondou, Mathieu, Egydio-Silva, Marcos

“…The Araçuaí-Ribeira belt formed during the amalgamation of West Gondwana in the late Neoproterozoic. Its evolution included a main tectonometamorphic peak at…”
Get full text

The 3.5 Ga São Tomé layered mafic-ultramafic intrusion, NE Brazil: Insights into a Paleoarchean Fe-Ti-V oxide mineralization and its reworking during West Gondwana assembly by Velásquez Ruiz, Felipe, Della Giustina, Maria Emilia Schutesky, de Oliveira, Claudinei Gouveia, Dantas, Elton Luiz, Hollanda, Maria Helena Bezerra

“…•The São Tomé intrusion, crystallized at ∼ 3.5 Ga, is the earliest record of continental crust generation in South America.•An intense fractional…”
Get full text

Mineral chemistry and crystal size distributions of mafic dikes and sills on the eastern border of the Parnaíba Basin, NE Brazil by Macêdo Filho, A.A., Archanjo, C.J., Hollanda, M.H.B.M., Negri, F.A.

“…Crystal size distributions (CSDs) and mineral chemistry of plagioclase and clinopyroxene are used to quantify textures and estimate timescales of Mesozoic…”
Get full text

Paleoproterozoic subduction-related metasomatic signatures in the lithospheric mantle beneath NE Brazil: inferences from trace element and Sr–Nd–Pb isotopic compositions of Neoproterozoic high-K igneous rocks by Maia de Hollanda, Maria Helena Bezerra, Pimentel, Márcio Martins, Jardim de Sá, Emanuel Ferraz

Get full text

Geology and Chemical Characterization of the Ultrapotassic Peralkaline Magmatism of the Manaíra-Princesa Isabel Dike Swarm, Borborema Provine by Maria Helena Bezerra Maia de Hollanda, Carolina Pelaéz Mejía, Carlos José Archanjo, Richard Armstrong

“…The Manaíra-Princesa Isabel dike swarm forms one of the most expressive examples of Neoproterozoic (c. 600 Ma)peralkaline magmatism in the Borborema Province…”
Get full text