Thesis (M.A.) in English--University of Maine, 2006. / Includes vita. Includes bibliographical references (leaves 156-159).

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En la actualidad, el territorio está siendo explorado intensamente, las compañías mineras al ubicar un yacimiento cuyo potencial será cuantificado, deberán evaluarlo para su aprovechamiento económico, utilizando los métodos modernos que ello requiere. Dentro de lo cual, la estabilidad de taludes constituye tal vez, el problema principal en la concepción y diseño de minas a cielo abierto, tanto desde el punto de vista económico como de seguridad. Precisamente, el presente estudio trata sobre las condiciones de estabilidad del talud de una mina de caolín a cielo abierto, donde el diseño del talud final de la mina, será efectuado teniendo en cuenta los parámetros geomecánicos, hidrogeológicos y estructurales. Así como los parámetros tenso – deformacionales del macizo rocoso. / --- At present, the territory is being explored intensely; the mining companies that find a mineral deposit whose potential will be quantified must evaluate their economic advantage, using modern methods that this requires. In which, slope stability is perhaps the main problem in the conception and design of opencast mines, both economically and security. Indeed, this study discusses the slope stability conditions in of kaolin mine open pit, where the design of the final slope of the mine will be made taking into account the geotechnical, hydrogeological and geology structural parameters. As the parameters tense - deformational of the rock mass.

The Marcona district of littoral south-central Perú represents the largest concentration of iron oxide-copper-gold deposits in the Central Andes. Hydrothermal activity occurred episodically from 177 to 95 Ma and was controlled by NE-striking faults. At Marcona, emplacement of massive magnetite orebodies with subordinate, overprinted magnetite-sulphide assemblages coincided with a 156-162 Ma episode of eruption of andesitic magma in the Jurassic arc, but mineralization is hosted largely by underlying, Lower Paleozoic metaclastic rocks. The magnetite orebodies exhibit smoothly curving, abrupt contacts, dike-like to tubular apophyses and intricate, amoeboid interfingering with dacite porphyry intrusions, interpreted as evidence for the commingling of hydrous Fe oxidic and silicic melts. An evolution from magnetite - biotite - calcic amphibole ± phlogopite assemblages, which are inferred to have crystallized from an Fe-oxide melt, to magnetite - phlogopite - calcic amphibole - sulphide assemblages coincided with quenching from above 700°C to below 450°C and with the exsolution of aqueous fluids with magmatic stable isotopic compositions. Subsequent, subeconomic chalcopyrite - pyrite - calcite ± pyrrhotite ± sphalerite assemblages were deposited from cooler fluids with similar δ34S, δ18O and δ13C values, but higher δD, which may record the involvement of both seawater and meteoric water. The much younger (95-110 Ma), entirely hydrothermal, Mina Justa Cu (-Ag) deposit is hosted by Middle Jurassic andesites intruded, on a district scale, by small dioritic stocks at the faulted SW margin of an Aptian-Albian shallow-marine volcano-sedimentary basin. Intense albite-actinolite alteration (ca. 157 Ma) and K-Fe metasomatism (ca. 142 Ma) long preceded the deposition of magnetite-pyrite assemblages from 500-600°C fluids with a magmatic isotopic signature. In contrast, ensuing chalcopyrite - bornite - digenite - chalcocite - hematite - calcite mineralization was entirely the product of non - magmatic, probably evaporite-sourced, brines. Marcona and Mina Justa therefore represent contrasted ore deposit types and may bear minimal genetic relationships. The former shares similarities with other Kiruna-type magnetite (-apatite) deposits. In contrast, the latter is a hydrothermal system recording the incursion of fluids plausibly expelled from the adjacent Cañete basin. Non-magmatic fluids are inferred to be a prerequisite for economic Cu mineralization in the Cu-rich IOCG deposits in the Central Andes and elsewhere. / Thesis (Ph.D, Geological Sciences & Geological Engineering) -- Queen's University, 2008-05-13 14:39:21.43

This thesis analyzes the long poem Anglo-Mongrels and the Rose by the modern poet Mina Loy according to its function as autobiography. Loy's intellectual environment prior to the poem's 1923 to 1925 publication and, in particular, the writing of the philosopher Henri Bergson shape her thinking about the self and consciousness. This intellectual background provides a foundation for a consideration of Loy's abstract poetic autobiography as what Loy called "auto-mythology." The abstraction of modern poetics provides a medium for Loy's expression of alienation as the hybrid offspring of an ethnically mixed marriage. Loy's long poem treats her heritage and upbringing in a mixed Jewish and Christian household; the effect of this intermingling of religion and ethnicity, or what was then considered race, is integral to understanding both her autobiographical expression of alienation and her optimism about the possibilities for Bergson's "creative evolution."

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Programa de Pós-Graduação em Geotecnia. Núcleo de Geotecnia, Escola de Minas, Universidade Federal de Ouro Preto. / Submitted by Oliveira Flávia (flavia@sisbin.ufop.br) on 2014-09-30T17:01:39Z No. of bitstreams: 1 DISSERTAÇÃO_ProposiçãoSistemáticaDisposição.pdf: 4665001 bytes, checksum: f4f41c0b3eaa32ae32f58f0cc6c25842 (MD5) / Rejected by Gracilene Carvalho (gracilene@sisbin.ufop.br), reason: on 2014-09-30T17:26:15Z (GMT) / Submitted by Oliveira Flávia (flavia@sisbin.ufop.br) on 2014-09-30T17:47:20Z No. of bitstreams: 2 license_rdf: 22190 bytes, checksum: 19e8a2b57ef43c09f4d7071d2153c97d (MD5) DISSERTAÇÃO_ProposiçãoSistemáticaDisposição.pdf: 4665001 bytes, checksum: f4f41c0b3eaa32ae32f58f0cc6c25842 (MD5) / Approved for entry into archive by Gracilene Carvalho (gracilene@sisbin.ufop.br) on 2014-11-18T15:37:17Z (GMT) No. of bitstreams: 2 license_rdf: 22190 bytes, checksum: 19e8a2b57ef43c09f4d7071d2153c97d (MD5) DISSERTAÇÃO_ProposiçãoSistemáticaDisposição.pdf: 4665001 bytes, checksum: f4f41c0b3eaa32ae32f58f0cc6c25842 (MD5) / Made available in DSpace on 2014-11-18T15:37:17Z (GMT). No. of bitstreams: 2 license_rdf: 22190 bytes, checksum: 19e8a2b57ef43c09f4d7071d2153c97d (MD5) DISSERTAÇÃO_ProposiçãoSistemáticaDisposição.pdf: 4665001 bytes, checksum: f4f41c0b3eaa32ae32f58f0cc6c25842 (MD5) Previous issue date: 2014 / No processo de beneficiamento da rocha fosfática do Complexo Alcalino Catalão I, são gerados três tipos de rejeitos: lamas, rejeitos de flotação e rejeitos magnéticos, os quais são dispostos separadamente em uma barragem denominada Barragem do Buraco. Para o desenvolvimento desta dissertação, os rejeitos magnéticos foram escolhidos por conta dos problemas operacionais que vêm ocorrendo atualmente na disposição deste após mais de 30 anos de operação da Mina Chapadão, além de ser um material que contém um alto teor de ferro, podendo ser comercializado no futuro. Neste trabalho foram estudados os parâmetros geotécnicos dos rejeitos magnéticos fazendo uma correlação entre ensaios de campo e laboratoriais, que compuseram a base de dados para o estudo de estabilidade de uma pilha de magnetita, projetada para atender ao Life of Mine (LOM) da Mina. _____________________________________________________________________ / ABSTRACT: During the phosphate rock beneficiation in Catalão I Alkaline Complex, three types of tailings are generated: slimes, flotation tailings and magnetic tailings, which are arranged separately at a dam called Buraco’s Dam. To develop this thesis, the magnetic tailings was chosen due to operational problems that have been happening recently in the disposal of it after over 30 years of operation of the Chapadão Mine, besides being a material that contains a high iron grade, which may be marketed in the future. In this paper the geotechnical parameters of the magnetic material were studied establishing connection between laboratory and field trials, which composed the database for the study of magnetite pile stability, designed to receive to the Life of Mine (LOM).

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