Mesoproterozoic rapakivi granites of the Rondonia Tin Province, southwestern border of the Amazonian craton, Brazil - I. Reconnaissance U-Pb geochronology and regional implications

Rapakivi granites and associated mafic and ultramafic rocks in the Rondonia Tin Province, southwestern Amazonian craton, Brazil were emplaced during six discrete episodes of magmatism between ca 1600 and 970 Ma. The seven rapakivi granite suites emplaced at this time were the Serra da Providencia Intrusive Suite (U-Pb ages between 1606 and 1532 Ma); Santo Antonio Intrusive Suite(U-Pb age 1406 Ma), Teotonio Intrusive Suite (U-Pb age 1387 Ma); Alto Candeias Intrusive Suite (U-Pb ages between 1346 and 1338 Ma); Sao Lourenco-Caripunas Intrusive Suite (U-Pb ages between 1314 and 1309 Ma); Santa Clara Intrusive Suite (U-Pb ages between 1082 and 1074 Ma); and Younger Granites of Rondonia (U-Pb ages between 998 and 974 Ma). The Serra da Providencia Intrusive Suite intruded the Paleoproterozoic (1.80 to 1.70 Ga) Rio Negro-Juruena crust whereas the other suites were emplaced into the 1.50 to 1.30 Ga Rondonia-San Ignacio crust. Their intrusion was contemporaneous with orogenic activity in other parts of the southwestern Amazonian craton, except for the oldest, Serra da Providencia Intrusive Suite. Orogenic events coeval with emplacement of the Serra da Providencia Intrusive Suite are not clearly recognized in the region. The Santo Antonio, Teotonio, Alto Candeias and Sao Lourenco-Caripunas Intrusive Suites are interpreted to represent extensional anorogenic magmatism associated with the terminal stages of the Rondonian-San Ignacio orogeny. At least the Sao Lourenco-Caripunas rapakivi granites and coeval intra-continental rift sedimentary rocks may, in contrast, represent the products of extensional tectonics and rifting preceding the Sunsas/Aguapei orogeny (1.25 to 1.0 Ga). The two youngest rapakivi suites, the Santa Clara Intrusive Suite and Younger Granites of Rondonia, seemingly represent inboard magmatism in the Rondonian-San Ignacio Province during a younger episode of reworking in the Rio Negro-Juruena Province during the waning stages of the collisional 1.1 to 1.0 Ga Sunsas/Aguapei orogeny. The six intra-plate rapakivi granite episodes in the southwestern part of the Amazonian craton form three broad periods of anorogenic magmatism that have age-correlative events composed of similar rocks and geologic environments in eastern Laurentia and Baltica, although the exact timing of magmatism appears slightly different. Recognition of lithologic and chronological correlations between various cratons provide important constraints to models explaining the interplay between rapakivi granite magmatism and deep crustal evolution of an early Mesoproterozoic supercontinent. They are, furthermore, important to plate tectonic models for the assembly, dispersal and reassembly of Amazonia, Laurentia and Baltica in the Mesoproterozoic and Neoproterozoic. (C) 1999 Elsevier B.V. B.V. All rights reserved.

Vidas presas: uma tentativa de compreensão da tragédia da criminalidade junto às suas personagens prisioneiras

Cet article présente une recherche sur les facteurs producteurs de la criminalité réalisée au début de la décennie 80 qui, en s'appuyant sur longs entretiens réalisées avec des prisonnières, a élaboré un ensemble d'hypothèses afin de comprendre les relations constitutives que ce phénomène maintient avec la pauvreté, avec la violence policière/pénitentiaire et avec les propres savoirs par lesquels ses actes et ses auteurs deviennent objet de connaissance. Sa présentation, aujourd'hui, vise deux objectifs: le premier, en hommage et reconnaissance à Sylvia Leser de Mello, est celui d'offrir un simple exemple, parmi tant d'autres, d'une des nombreuses aventures de recherche rendue possible par son orientation. Le second est celui de partager avec des chercheurs qui s'intéressent au même thème une étude qui, polémique et innovatrice à l'époque de sa réalisation, conserve sa pertinence face, actuellement, aux caractéristiques particulièrement graves présentées par les questions abordées.

Geologia estrutural aplicada às rochas ornamentais na Pedreira Knawa, Cláudio (MG)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Os primeiros contornos do Novo Mundo: os relatos sobre a França Antártica e sobre a Flórida Francesa

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Parâmetros comportamentais e químicos na interação entre o caranguejo-aranha Libinia spinosa (Majoidea) e anêmona Calliactis tricolor (Hormathidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

A aposentadoria por idade do trabalhador rural sob o enfoque constitucional: efetivação por meio da atividade judicial

Pós-graduação em Direito - FCHS

Hip Hop na aula de FLE: aprendendo e ensinando o léxico não-padrão

Appuyé sur le concept de lexiculture, proposé par R. Galisson (2000), et en reconnaissance de l’existence et de la dimension du mouvement Hip Hop en France, le but de cet article est d’examiner l’importance de cette culture et de son lexique dans le contexte français, soulignant aussi la nécessité de son insertion dans les matériels éducatifs destinés à l’enseignement du français langue étrangère (FLE). À cet effet, nous avons elaboré, à l’aide d’un système de traitement de corpus, une liste bilingue français-portugais brésilien de ce lexique, à partir des paroles des trois principaux artistes français. Il faut noter que la plupart de ces unités lexicales ne sont pas présentes dans les dictionnaires généraux bilingues, ce qui crée des difficultés aux apprenants ainsi qu’aux enseignants d’accès à ce lexique, qui coexiste avec la langue standard étudiée et qui représente une grande richesse linguistique.

A relativa legitimidade da depressão na atualidade: contribuições para uma ética psicanalítica do sujeito

This article is based on the author's clinical practice in the area of public health, and discusses depression as it is known today. Essentially, the author questions the practice of labeling depression as a psychopathological condition. The author also questions today’s trend of seeing a subject’s suffering as a "malaise," or a “disorder.” The possibility is brought up of understanding it as a "demand for analysis." Finally, the article is meant as a contribution to the ethics of psychoanalysis focused on the subject and the possibilities of psychoanalysis in subjectivating this "malaise."

Relações de trabalho dos jogadores profissionais do poker: um estudo à luz da psicossociologia

Pós-graduação em Psicologia - FCLAS

Paricipation in Bauru marter plans, Brazil: analysis of the historical evolution of the consultation process

In Brazil, a policy on citizen participation and consultation in urban intervention programs, in particular in the development of master plans, was first introduced into the Federal Constitution in 1988. This article presents an historical reconstitution of Master Plans in Bauru – State of São Paulo – Brazil. The 1968, 1988 and 2005/2006 consultation methods are analyzed using established criteria. The degree of community participation in the processes is estimated by drawing on a typology based on the level of involvement by residents. The effects of participation caused by changes in political regime, technical planning vision, legal support to consultation, recognition of community importance and knowledge acquired during the process are highlighted and discussed.