Magmatismo há ca. 660 - 640 Ma no Domínio Socorro: Registros de convergência-colisional na Aglutinação do Gondwana Ocidental

Uranium-lead zircon ages between 660 and 640 Ma, obtained from a series of calc-alkaline orthogneisses and plutons in southeast Brazil's Central Mantiqueira Province, suggest that a significant period of magmatism occurred in this region prior to the collisional assembly of West Gondwana (presently constrained in the region between ca. 625 and 580 Ma). While the nature of this earlier magmatism is presently unclear, some preliminary Sm-Nd data suggest that these magmas were not solely derived from the Paleoproterozoic lithosphere, but appear to represent hybrid products of Paleoproterozoic and Neoproterozoic sources. As such hybrid mixtures have been most commonly observed in continental are settings, it is possible that the 660 to 640 Ma magmatism represents are magmatism that resulted from subduction of Neoproterozoic oceanic crust during early precollisional convergence and closure of a branch of either the Adamastor or Goianides oceans.

Caracterização das falhas de transferência na porção norte da Bacia de Santos a partir da integração de dados geológicos e geofísicos

Structures transverse/sub-transverse to the shoreline have been identified and characterized on the precambrian basement outcrop on the continent adjacent to the northern Santos Basin. These structures were analyzed from images of digital elevation model SRTM 90m by extracting NW-SE lineaments that intersect the NE-SW foliation. The lineaments were selected, classified into 48 segments that extend toward offshore, and correlated with basin structures. In the basin 25 2D seismic sections, 12 well logs and data from potential methods were interpreted, identifying the key stratigraphic levels and the major structures. Structural maps of each horizon were generated. Six transfer faults (FTs) were recognized and named FT-1 to FT-6, whose extensions correspond to continental lineaments named FC1 to FC6. The FTs are related to the basin deformation and evolution. In seismic sections, these faults have lateral slip in flower structures, displacement inversions from normal at the top to reverse at the base, abrupt changes in thickness or even disappearance of the seismic reflectors. The structural map of the Basement and Top of the Rift shows control of some depocenters by faults and displacements in some areas. The maps of potential methods indicate that there are pronounced anomaly shifts in some areas, associated with FTs. Some seismic sections indicate reactivation of FTs when they intersect horizons from the basement until the most recent layers. The 3D integration of data facilitated the observation of the FT extensions in the continent discontinuity.

Mujeres indígenas en América Latina: dinámicas demográficas y sociales en el marco de los derechos humanos

Incluye bibliografía

Discurso de apertura del taller

Incluye Bibliografía

Discurso en la reunión de expertos sobre insumos sociodemográficos para la gestión y el desarrollo local

Incluye Bibliografía

Discurso en la reunión de especialistas "Futuro de las Familias y Desafíos para las Políticas Públicas"

Incluye Bibliografía

Informe general: Encuesta Demográfica Nacional de Honduras (EDENH II 1983)

Complementa la información contenida en el documento LC/DEM/CR/G.7

Costa Rica: revision de la proyeccion de poblacion, 1975-2025

La revision de la proyeccion de poblacion de Costa Rica basada en el censo de 1973, incorpora las ultimas tendencias observadas a la vez que se extiende hasta el ano 2025. Los resultados que se presentan son mas que nada esfuerzos para mejorar las perspectivas de la poblacion y lo que se hace es reemplazar los niveles previstos para los componentes demograficos del quinquenio 1975-1980 por cifras mas realistas. Combinando las 4 hipotesis de fecundidad con una de mortalidad y otra de migracion internacional, mediante el metodo de los componentes, se obtuvieron 4 proyecciones. Segun los resultados de la proyeccion recomendada, la poblacion de Costa Rica pasara de 2.28 millones en 1980 a 5.10 al termino de la proyeccion (2025), lo que representa un aumento del 124 por ciento (p230).

Shaping competitiveness in the Chilean wood-processing industry

Includes bibliography

Systemic competitiveness: a new challenge for firms and for government

Includes bibliography

Búsqueda de competitividad en la industria maderera chilena

Incluye Bibliografía

Competitividad sistémica: nuevo desafío para las empresas y la política

Incluye Bibliografía

Evaluación del uso de las estadísticas vitales para estudios de causas de muerte en América Latina

Incluye Bibliografía

Estimación de la mortalidad adulta en seis parroquias del valle central de Costa Rica (1888-1910) a partir de la información sobre orfandad

Incluye Bibliografía