Magmatism and fenitization in the Cretaceous potassium-alkaline-carbonatitic complex of Ipanema So Paulo State, Brazil

The Ipanema alkaline-carbonatitic complex is part of the Meso-Cenozoic alkaline magmatism located within the southeastern part of the Brazilian Platform. Drill-core and field sampling have indicated the occurrence of glimmerites, with subordinate shonkinites (mela-syenites), clinopyroxene-bearing glimmerites, diorites and syenites. The glimmerites are cross-cut by lamprophyric dykes and calciocarbonatites. Fenitization has deeply affected the country rocks, originating dioritic and syenitic rocks. The Ipanema rocks show a distinct potassic affinity. The initial Sr-Nd- isotopic composition of the Ipanema rocks ((87)Sr/(86)Sr = 0.70661-0.70754 and (143)Nd/(144)Nd = 0.51169-0.51181) is similar to that of tholeiitic and potassium-rich-alkaline rocks of the Eastern Paraguay. Stable isotope data for the Ipanema calciocarbonatite suggest interaction with fluids at temperatures typical of hydrothermal stages, as hypothesized for other carbonatite complexes from southeastern Brazil. The chemical differences between the lamprophyre, glimmerites, carbonatites, apatitites and magnetitites, and the absence of marked REE enrichment in the evolved lithologies, all indicate that fractional crystallization and accumulus of liquidus phases in a magma reservoir, likely coupled with liquid immiscibility processes, may have played an important role in the genesis of the Ipanema rocks.

ADOLESCENCE AND DRUG USE THROUGH THE LENS OF PSYCHOANALYSIS: SUFFERING AND ECSTASY IN THE PASSAGE

ADOLESCENCE AND DRUG USE THROUGH THE LENS OF PSYCHOANALYSIS: SUFFERING AND ECSTASY IN THE PASSAGE The purpose of this study is to reflect upon the psychological factors of adolescent drug addiction according to a psychoanalytic perspective. First we consider adolescence as a social-historical category and then we discuss the psychoanalytic understanding of the adolescent transition. This theoretical path builds the approach that considers drug use as a phenomenon that serves as a passage ritual to contemporary adolescence. This phenomenon is modulated by the drive organization, which determines how the individual will take ownership of the use of psychoactive substances. We conclude that the substance use may function as a buffer-object, activated to deal with the structural fragility of the contemporary affective bonds.

Garota de Mitilene

A proposta é uma abordagem de "Garota de Ipanema" de Jobim e Vinicius e de um poema de Safo, "Ode a Anactória" (século VII a.C.), que abriga um verso que diz, literalmente: "Esse modo de andar que desperta o desejo". E aí, aproveitando a deixa, desenvolvo um cotejo entre outros fragmentos de Safo e essa canção paradigmática da MPB, datada de 1962. Trata-se de um contraponto com 27 séculos de permeio e que - por maior que seja o cuidado em respeitar a historicidade do afeto (e não cometer anacronismos) - revela surpreendentes invariantes. Mas entre Safo e Jobim/Vinicius há Freud, ou melhor, Jensen, com a sua Gradiva - que tematiza, exatamente, o andar da mulher desejada. Por sua vez, o musicólogo Almir Chediak vê um paralelo entre o desenho melódico da partitura de "Garota de Ipanema" e as ondas do mar, no seu movimento de fluir e refluir; e no gráfico apresentado, de fato, delineia-se esse ritmo iconizado. Efetivamente, a onda, o passo ondulante, o ritmo, o tema, "o doce balanço, caminho do mar": tudo converge nessa brasileiríssima canção, que patenteia, no entanto, tão instigantes recorrências com a lírica grega arcaica.