Análisis de la reducción del azufre en el combustible diesel en El Salvador, Guatemala, Honduras y Nicaragua

Incluye bibliografía

La desregulación petrolera en la Argentina

Incluye Bibliografía

Restauración y mantenimiento de los equilibrios macroeconómicos básicos

Incluye Bibliografía

Ahorro e inversión bajo restricción externa y fiscal: el caso de Chile, 1982-1987

Incluye Bibliografía

La deuda interna chilena: 1975-1985

Incluye Bibliografía

Determinantes de la inversión en el sector petróleo y gas en la Argentina

Incluye Bibliografía

ICT in Chilean firms

Includes bibliography

Science and technology, ICT and profitability in the manufacturing sector in Peru

Includes bibliography

Impacto de shocks macroeconómicos sobre la situación financiera en las empresas

Incluye Bibliografía

Da geografia medieval às origens da geografia moderna: contrastes entre diferentes noções de natureza, espaço e tempo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Modelo estrutural do maciço rochoso do Depósito de Cobre e Ouro da Mina da Chapada, Alto Horizonte, GO

The Cu-Au mine of Chapada is located in the municipality of Alto Horizonte, in the northwestern portion of Goiás state and is inserted in the geological context of the Brasilia Belt, specifically the Mara Rosa Magmatic Arc, which hosts important deposits of Au and Cu-Au. The rocks found in the study area belong mainly to the Volcano-Sedimentary Sequence of Mara Rosa and are composed of basic to acidic metavolcanic rocks, psammiticpellitic metasedimentary rocks, chemical rocks and also hydrothermal products. Late intrusions occur and are represented by pegmatitic dikes and tonalitic bodies. The ore deposit of the Chapada mine is formed predominantly by the chalcopyrite-pyritemagnetite association, where pyrite is the most abundant mineral. Through the structural mapping of the mining fronts, it was able to recognize three deformational phases (Dn, Dn +1, Dn +2). During the Dn phase, isoclinal recumbent folds were formed, in association with amphibolites facies metamorphism. Later, in phase Dn +1, there was formation of drag folds and intrafolial folds in association with retrograde metamorphism in the greenschist facies. The deformational phase Dn +2, in its turn, was responsible for late symmetrical folding of the foliation, with NS and EW axes, resulting in an interference pattern of the dome-and-basin type