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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
311

Disability, caregiver's dependency and patterns of access to rehabilitation care: results from a national representative study in Peru

Bernabe-Ortiz, Antonio, Diez Canseco, Francisco, Vásquez, Alberto, Miranda, J. Jaime 30 May 2015 (has links)
Article / PURPOSE: To determine the prevalence of disability in Peru, explore dependency on caregiver's assistance and assess access to rehabilitation care. METHOD: Data from Disability National Survey (ENEDIS), including urban and rural areas, were analyzed. Disability was defined as a permanent limitation on movement, vision, communication, hearing, learning/remembering or social relationships. Dependency was defined as the self-reported need for a caregiver to help with daily activities; and access to rehabilitation care was defined as the self-report of any therapy for disabilities. Estimates and projections were calculated using sample strata, primary sampling units and population weights, and prevalence ratios (PRs) and 95%CI were reported. RESULTS: From 798 308 people screened, 37 524 (5.1%; 95%CI 4.9--5.2%) had at least one disability. A total of 37 117 were included in further analysis, mean age 57.8 (SD ± 24.1) years, 52.1% women. Dependency was self-reported by 14 980 (40.5%; 95%CI: 39.2-41.9%) individuals with disabilities. A family member, usually female, was identified as a caregiver in 94.3% (95%CI: 93.3-95.3%) of dependent participants. Only 2881 (10.7%; 95%CI: 9.7-11.9%) of people with disabilities reported access to rehabilitation care. Major inequality patterns of disability burden versus access to rehabilitation care were observed by age and education level. Older age groups had higher disability burden yet lower chances of access to rehabilitation care. Conversely, the higher the education level, the lesser the overall disability burden but also the higher chances of reporting receiving care. Private healthcare insurance doubled the probability of having access to rehabilitation compared with those without insurance. CONCLUSIONS: Approximately 1.6 million Peruvians have at least one disability, and 40% of them require assistance with daily activities. Informal caregiving, likely female and relative-provided, is highly common. Rehabilitation care access is low and inequitable. Our results signal a major need to implement strategies to guarantee the highest standard of health care for people with disabilities. Implications for Rehabilitation Major inequality patterns in terms of burden of disability versus access to rehabilitation care were observed: those groups who concentrate more disability reported receiving less rehabilitation care. Caregiving is mostly informal and provided by a direct relative, mainly a woman, who resigned to their usual activities in order to help care for the person with disability. As a result, there is a need to develop appropriate support and training for caregivers. Access to care services in Peru is low and inequitable, but especially for people with disabilities: they experience greater barriers when accessing healthcare services even in the case of having health insurance. / Revisión por pares
312

Plagiarism, Cheating and Research Integrity: Case Studies from a Masters Program in Peru

Carnero, Andres M., Mayta-Tristan, Percy, Konda, Kelika A., Mezones Holguín, Edward, Bernabe-Ortiz, Antonio, Alvarado, German F., Canelo Aybar, Carlos, Maguiña, Jorge L., Segura, Eddy R., Quispe, Antonio M., Smith, Edward S., Bayer, Angela M., Lescano, Andres G. 15 November 2016 (has links)
Plagiarism is a serious, yet widespread type of research misconduct, and is often neglected in developing countries. Despite its far-reaching implications, plagiarism is poorly acknowledged and discussed in the academic setting, and insufficient evidence exists in Latin America and developing countries to inform the development of preventive strategies. In this context, we present a longitudinal case study of seven instances of plagiarism and cheating arising in four consecutive classes (2011–2014) of an Epidemiology Masters’ program in Lima, Peru, and describe the implementation and outcomes of a multifaceted, “zero-tolerance” policy aimed at introducing research integrity. Two cases involved cheating in graded assignments, and five cases correspond to plagiarism in the thesis protocol. Cases revealed poor awareness and high tolerance to plagiarism, poor academic performance, and widespread writing deficiencies, compensated with patchwriting and copy-pasting. Depending on the events’ severity, penalties included course failure (6/7) and separation from the program (3/7). Students at fault did not engage in further plagiarism. Between 2011 and 2013, the Masters’ program sequentially introduced a preventive policy consisting of: (i) intensified research integrity and scientific writing education, (ii) a stepwise, cumulative writing process; (iii) honor codes; (iv) active search for plagiarism in all academic products; and (v) a “zero tolerance” policy in response to documented cases. No cases were detected in 2014. In conclusion, plagiarism seems to be widespread in resource-limited settings and a greater response with educational and zero-tolerance components is needed to prevent it. / This study was funded by the training Grant 2D43 TW007393-06 awarded to the U.S. Naval Medical Research Unit No. 6 (NAMRU-6) by the Fogarty International Center of the U.S. National Institutes of Health. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
313

A reforma universitária no Peru, 1968-1976 : uma tentativa de análise politica

Alva, Jorge Alberto Loli January 1989 (has links)
Submitted by Marcia Bacha (marcia.bacha@fgv.br) on 2011-05-12T17:18:14Z No. of bitstreams: 1 000054673.pdf: 8123991 bytes, checksum: 065f86c299a9ee5d81425cf50453183a (MD5) / Approved for entry into archive by Marcia Bacha(marcia.bacha@fgv.br) on 2011-05-12T17:18:50Z (GMT) No. of bitstreams: 1 000054673.pdf: 8123991 bytes, checksum: 065f86c299a9ee5d81425cf50453183a (MD5) / Approved for entry into archive by Marcia Bacha(marcia.bacha@fgv.br) on 2011-05-12T17:19:11Z (GMT) No. of bitstreams: 1 000054673.pdf: 8123991 bytes, checksum: 065f86c299a9ee5d81425cf50453183a (MD5) / Made available in DSpace on 2011-05-12T17:19:16Z (GMT). No. of bitstreams: 1 000054673.pdf: 8123991 bytes, checksum: 065f86c299a9ee5d81425cf50453183a (MD5) Previous issue date: 1989
314

SPECIATION ALONG THE PERUVIAN ANDES-AMAZON TRANSITION ZONE: PHYLOGEOGRAPHY AND LANDSCAPE GENETICS OF THE AMEEREGA PETERSI GROUP (FAMILY: DENDROBATIDAE)

French, Connor Martin 01 August 2018 (has links)
The Amazon rainforest along the Andean foothills contains exceptionally high diversity, much of it recent. The complex geology of the Andes and paleoclimate fluctuations preclude complex dispersal scenarios. This, in turn, has contributed to idiosyncratic speciation modes among shallowly-diverged Amazonian taxa. The poison frog genus Ameerega recently radiated throughout the Andes and Amazon (MRCA ~8.7 mya), with some taxa diverging as recently as the late Pliocene and early Pleistocene. Some species-level relationships remain poorly resolved, especially among recently diverged taxa. Here, I define ancestral populations and address the phylogenetic relationships among three recently diverged Peruvian Ameerega species (A. cainarachi, A. petersi, and A. smaragdina), using multiple species tree methods, including one that accounts for reticulate evolution. I complement species tree inference with assessments of behavioral divergence and niche overlap to better resolve species boundaries. I further explore the phylogeographic history of these species of Ameerega with demographic inference, considering evidence for population expansions. These analyses provide the basis to address speciation hypotheses in the Andean lowlands, including the refugial hypothesis and dispersal-vicariance hypothesis. I find support to synonymize A. smaragdina with A. petersi, and that divergent and convergent reticulation processes and historical range expansion impacted the A. petersi group’s speciation history. In addition, I use species distribution modeling (SDM) to infer the A. petersi group’s range dynamics since the mid-Pleistocene (785 kya). SDMs reveal periods of range expansion, contraction, and shifts, tracking climate fluctuations during the Pleistocene. In order to explicitly consider the relative roles of climate and geography in structuring genetic diversity at different time periods, I use a landscape genetics approach and consider 21 isolation-by-resistance hypotheses. These hypotheses include climatic resistance layers from five time periods in the Pleistocene, a stability layer, two geographic layers that reflect the two species’ natural history (distance-from-river and mid-elevation resistance), and composite layers that pair geographic and environmental layers. I find that climate stability and river proximity best explain gene flow. I find that phylogeographic, niche modeling, and landscape genetic evidence supports a dispersal-vicariance model of speciation in the A. petersi group.
315

The Corrientes River Case: Indigenous People's Mobilization in Response to Oil Development in the Peruvian Amazon / Indigenous People's Mobilization in Response to Oil Development in the Peruvian Amazon

Lu, Graciela Maria Mercedes 12 1900 (has links)
xiii, 84 p. : maps. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. / Economic models applied in Latin America tend to prioritize economic growth heavily based on extractive industries and a power distribution model that affects social equity and respect for human rights. This thesis advances our understanding of the social, political and environmental concerns that influenced the formation of a movement among the Achuar people, in response to oil exploitation activities in the Peruvian Amazon. This study is based on a political ecology analysis and a review of existing literature on local and global relations of environmental issues. The Corrientes River case reveals how Amazonian indigenous people gained competence to demand recognition of their collective rights to health and citizenship. The Achuar people's mobilization was a result of frustration of sterile dialogue with the authorities, the oil companies, and the pressure exerted by local people on their leaders. This mobilization resulted in an agreement that otherwise would likely not have been reached. / Committee in Charge: Derrick Hindery, Chair; Anita M. Weiss; Carlos Aguirre
316

Sistematização, descrição e território das artérias cerebrais média e caudal, artéria cerebroetmoidal e da artéria cerebelar ventral caudal na superfície do encéfalo em peru (Meleagris gallopavo)

Carvalho, Amarílis Díaz de January 2013 (has links)
Neste trabalho foi descrito e sistematizado a distribuição e território das artérias cerebrais média e caudal, artéria cerebroetmoidal e artéria cerebelar ventral caudal na superfície do encéfalo de 30 perus (Meleagris gallopavo), 10 machos e 20 fêmeas, jovens e adultos (idade entre 2,5 meses e 3,5). A artéria cerebral caudal de um antímero formava a artéria inter-hemisférica que lançava ramos hemisféricos dorsais para a face convexa de ambos os antímeros. Seu ramo tectal mesencefálico dorsal de apenas um antímero originava a artéria cerebelar dorsal. No interior da fissura transversa do cérebro, após a origem da artéria tectal mesencefálica dorsal, a artéria cerebral caudal lançou ramos hemisféricos occipitais, ramos pineais e hemisféricos mediais em ambos os antímeros. O território da artéria cerebral caudal compreendeu toda a superfície do hemilobo óptico dorsal, a face rostral do cerebelo, as estruturas diencefálicas, o polo caudal e a face medial do hemisfério cerebral e na face convexa do hemisfério cerebral a eminência sagital exceto seu terço mais rostral. Devido à assimetria encontrada nas ramificações das artérias cerebrais caudais, foram classificados os modelos em três tipos com seus respectivos subtipos. A artéria cerebral média projetou-se em arco rostrolátero- medialmente através da superfície ventral do hemisfério cerebral e lançou inúmeros ramos perfurantes que penetravam no complexo estriado das aves. Lançou ramos hemisféricos ventrais que projetaram-se em direção medial na base do hemisfério cerebral e concorriam com a artéria cerebral rostral na vascularização dessa área, e uma sequência de ramos hemisféricos laterais que ascendiam no hemisfério cerebral, na face convexa, até a altura da valécula telencefálica e terminou-se em seus ramos hemisféricos rostrais, que curvaram-se lateralmente ao bulbo olfatório, dorsalmente, ascendendo à face convexa, vascularizando o terço mais rostral da eminência sagital. O território da artéria cerebral média compreendeu toda a extensão da base do hemisfério cerebral exceto uma área triangular mais medial e caudal que era vascularizada pela artéria cerebral rostral. Na face convexa do hemisfério cerebral, seu território alcançava a valécula telencefálica. Seus ramos hemisféricos rostrais vascularizavam o polo frontal do hemisfério cerebral e bulbo olfatório, mais o terço rostral da eminência sagital. A artéria cerebroetmoidal é a continuação natural do ramo rostral da artéria carótida do cérebro, a partir da origem da artéria cerebral média. Emitiu como ramos colaterais a artéria cerebral rostral, um vaso pequeno projetado da artéria cerebroetmoidal e a artéria etmoidal que projetou-se rostralmente em direção ao bulbo olfatório, acompanhando a fissura inter-hemisférica, alcançando o bulbo olfatório e a cavidade nasal, através do forame olfatório. O território da artéria cerebroetmoidal e suas ramificações vascularizaram uma pequena área triangular da base do hemisfério cerebral entre a artéria cerebral média e o quiasma óptico, porém sua principal função vascular nas aves, é irrigar toda a cavidade nasal. No peru a artéria carótida do cérebro, de apenas um antímero, apresentou seu ramo caudal desenvolvido formando à artéria basilar. No antímero oposto, o ramo caudal transformou-se na artéria tectal mesencefálica ventral e sua terminação medial, o ramo caudal vestigial, mergulhava na fossa interpeduncular, não se anastomosando com o ramo desenvolvido do antímero oposto. O círculo arterial cerebral foi sempre aberto caudalmente. O ramo caudal desenvolvido apresentou como ramo colateral a artéria tectal mesencefálica ventral. O mesencéfalo do peru era composto pelo lobo óptico que teve sua face dorsal vascularizada pela artéria tectal mesencefálica dorsal, ramo da artéria cerebral caudal. Sua face ventral foi vascularizada pelas ramificações da artéria tectal mesencefálica ventral. Esta apresentou variações alcançando parte do cerebelo, principalmente seus lóbulos ventro-rostrais. O rombencéfalo era composto por medula oblonga e cerebelo e foi vascularizado por dois pares principais de artérias cerebelares ventrais rostrais e caudais. A face rostral do cerebelo foi suprida, quando da presença, pela artéria cerebelar dorsal, proveniente de apenas um antímero, ramo da artéria tectal mesencefálica dorsal, pertencente ao sistema arterial cerebral caudal. / In this work was described and systematized the distribution and territory of the middle and caudal cerebral arteries, cerebroethmoidal and caudal ventral cerebellar arteries at the surface of the brain of 30 young and adult turkeys (Meleagris gallopavo), 10 males and 20 females. The caudal cerebral artery of one antimere formed the interhemispheric artery, which gave off dorsal hemispheric branches to the convex surface of both antimeres. Its dorsal tectal mesencephalic branch of only one antimere originated the dorsal cerebellar artery. Inside the cerebral transverse fissure, after the origin of the dorsal tectal mesencephalic artery, the caudal cerebral artery gave off occipital hemispheric branches, pineal branches and medial hemispheric branches on both antimeres. The territory of the caudal cerebral artery comprehended the entire surface of the dorsal hemioptic lobe, the rostral surface of the cerebellum, the diencephalic structures, the caudal pole and the medial surface the cerebral hemisphere and on the convex surface of the cerebral hemisphere the sagittal eminence, except for its most rostral third. Due to an asymmetry found in the ramifications of the caudal cerebral arteries, the models were classified in three types with their respective subtypes. The middle cerebral artery projected in arch rostrolateromedialwards through the ventral surface of the cerebral hemisphere and gave off several perforating branches, which penetrated in the striated complex of the birds. It gave off ventral hemispheric branches, which were projected medialwards at the base of the cerebral hemisphere and disputed with the rostral cerebral artery for the vascularization of this area, and a sequence of lateral hemispheric branches, which ascended to the cerebral hemisphere, at the convex surface, at the level of the telencephalic vallecula and the terminal branch was the rostral hemispheric branches, which curved towards the lateral side of the olfactory bulb, ascending to the convex surface, vascularizing the most rostral third of the sagittal eminence. The territory of the middle cerebral artery comprehended the entire base extension of the cerebral hemisphere, except for a most medial and caudal triangular area, which was vascularized by the rostral cerebral artery. At the convex surface of the cerebral hemisphere, its territory reached the telencephalic vallecula. Its rostral hemispheric branches vascularized the frontal pole of the cerebral hemisphere and olfactory bulb, and also the rostral third of the sagittal eminence. The cerebroethmoidal artery is the natural continuation of the rostral branch of the cerebral carotid artery, from the origin of the middle cerebral artery. It gave off as collateral branches the rostral cerebral artery, a small vessel projected from the cerebroethmoidal artery and the ethmoidal artery, which projected rostralwards towards the olfactory bulb, following the interhemispheric fissure, reaching the olfactory bulb and the nasal cavity, through the olfactory foramen. The territory of the cerebroethmoidal artery and its ramifications vascularized a small triangular area of the base of the cerebral hemisphere between the middle cerebral artery and the optic chiasm, however its main vascular function in birds is to irrigate the entire nasal cavity. In the turkey, the cerebral carotid artery, in only one antimere, presented a developed caudal branch forming the basilar artery. On the opposite antimere, the caudal branch transformed into the ventral tectal mesencephalic artery and its medial terminal branch, the vestigial caudal branch, entered the interpeduncular fossa, not anastomosing with the developed branch of the opposite antimere. The cerebral arterial circle was always opened caudalwards. The developed caudal branch presented as collateral branch the ventral tectal mesencephalic artery. The mesencephalon of the turkey was composed by the optic lobe, which had its dorsal surface vascularized by the dorsal tectal mesencephalic artery, branch of the caudal cerebral artery. Its ventral surface was vascularized by the ramifications of the ventral tectal mesencephalic artery. This presented variations reaching part of the cerebellum, mainly its rostroventral lobules. The rhombencephalon was composed by medulla oblongata and cerebellum and was vascularized by two main pairs of caudal and rostral ventral cerebellar arteries. The rostral surface of the cerebellum was supplied, when present, by the dorsal cerebellar artery, provided from just one antimere, branch of the dorsal tectal mesencephalic artery, pertaining from the caudal cerebral arterial system.
317

Desenhos, relações e desenvolvimento : conflitos em torno da mineração na região andina de Cajamarca, Peru

Paredes Peñafiel, Adriana Paola January 2016 (has links)
Este trabalho de tese trata das dinâmicas da mineração a céu aberto e seus efeitos na água da região andina de Cajamarca, ao norte do Peru. O objetivo consiste em analisar “desenhos locais” que entram em conflito com os desenhos propostos – e alguns já instalados – pela mineração moderna, que começam a proliferar no Peru a partir de 1990 como um caminho inquestionável de desenvolvimento. Por meio de pesquisa de abordagem etnográfica, realizada entre 2013 e 2014, analisam-se dois casos. No primeiro, examinam-se as diferenças ontológicas mobilizadas pelas pessoas como resultado de ações causadas pelo projeto de mineração Conga, que “sacrificará” importantes lagoas na região de Cajamarca, Peru. Nesse contexto, campesinos e ronderos do centro poblado El Tambo têm se organizado para vigiar a lagoa Mamacocha. Observa-se que a relacionalidade dos campesinos com Mamacocha é ativada pela realidade da experiência vivida com a água, que começou a desaparecer a partir dos projetos de mineração, mas que é coproduzida em “encontros” com outras concepções ontológicas. Tais encontros dinamizam histórias orais da memória local. Para além de uma representação essencialista do conhecimento indígena versus o científico, são os diferentes regimes de relação com a água que intensificam colaborações entre os coletivos. O efeito é a emergência de “Mamacocha estendida”, sinalizada nas manifestações como “obra de Deus”, “água que alimenta” e “aquíferos”, a depender das relações e dos grupos, e dos campesinos como “guardiões das lagoas”. A noção de “alimentar” aparece em diálogos com campesinos que enfatizam relações entre as colheitas, os canais de irrigação e os puquios (nascentes de água) salientando que as lagoas não podem ser substituídas por reservatórios artificiais que a empresa propõe construir. Em um segundo caso, analisa-se como o desenho de uma mina a céu aberto na cidade de Hualgayoc, região próxima à anterior, influencia as pessoas que inicialmente desenhavam na terra, os velhos mineiros de socavão. Embora os mineiros articulem a história de um passado mineiro, o seu esforço por negociar suas relações com a empresa mineira oscilam entre antagonismo e expectativas por uma ocupação neste mercado de trabalho. Muitos deles são ignorados pelas grandes empresas por não serem os “mineiros modernos” que hoje manipulam maquinarias sofisticadas, apesar de terem trabalhado por muito tempo no socavão. Quando o centro urbano de Hualgayoc se tornou uma AID (Área de Influência Direta) da mineração a céu aberto, os seus habitantes foram categorizados em classificações específicas que os reprimem. Além disso, o que mostra o caso de Hualgayoc é que o projeto mineiro somente oferece trabalho pelas falhas que ele mesmo causa ao ser implementado. Esta perda é vista como uma oportunidade de trabalho para contratar pessoas que possam trazer água de outros lugares. Os efeitos na natureza e nas pessoas são reais, e, principalmente, os efeitos nas águas andam em paralelo com os projetos de vida de muitas pessoas que resistem ao projeto mineiro. Estes dois casos na região emblemática de Cajamarca ilustram os conflitos em torno de desenhos, relações e desenvolvimento. / This PhD dissertation is about the dynamics of open-pit mining activity and related controversies around water in the Andean region of Cajamarca, Peru. The goal is to analise “local designs” that are threatened by designs - some of them are already encroached on the land used by campesinos - coming from modern mining whose proliferation started in 1990 as a non-questionable way to development. Based on ethnographic research conducted between 2013 and 2014 in the region of Cajamarca, this work analises two cases. The first one, I examine ontological differences mobilized by people when the Yanacocha Mining Company officially announced its proposal to construct an open-pit copper-gold mine and would require draining important lagoons. In this context, campesinos (peasant farmers) and ronderos (rural patrol) from the hamlet of El Tambo organized themselves in order to guard the Mamacocha lagoon. Based on fieldwork in the area of the proposed Conga Mining Project, the author argue that the relationality between the campesinos and Mamacocha results from campesinos’ lived experiences with water that started to scarce, but it is also produced through encounters with other ontological conceptions. Those encounters activate older narratives about Mamacocha. These different ways of knowing designing should not be understood as an essentialist representation of ‘Indigenous’ knowledge that stands in opposition to ‘Western’ or scientific knowledge. Different regimes of relations with water intensify collaborations bewteen collectivities. The effect is the enactment of an “extended Mamacocha” as “God’s creation”, “water that nourishes” and “aquifers” and the campesinos as “Guardians of the Lagoons”. The concept of ‘nourishment’ appeared in dialogues with campesinos, emphasizing the relationship between food crops, irrigation channels, and natural water springs, could not be replaced with artificial reservoirs that the company proposed to build. In the second case, I analise how the design of an open-pit mine in the city of Hualgayoc, close to the previous area, influences people who used to be underground miners. Even though, miners articulate a narrative that Hualgayoc is a “mining region”, their efforts to negotiate with the mining company oscilate between antagonism and expectations for jobs. Some of them are ignored for not being modern miners that manipulate sophiscated machines, even though they have worked as underground miners for decades. When the urban center of Hualagyoc became an ADI (area of direct influence), their residents were also categorized in specific classification that repress them. Besides, the case shows that the Project offers jobs because of their own failures during its implementation. This loss is seen as an oportuniuty for hiring people that could bring water from other places. The effects on the environment and people are real, they travel through parallel worlds. These two cases in the emblematic region of Cajamartca illustrate conflicts around designs, relations and development.
318

No soy um aculturado: identidade nacional e indigenismo nas obras de José María Arguedas

JESUS, G. M. 22 October 2015 (has links)
Made available in DSpace on 2016-08-29T15:07:36Z (GMT). No. of bitstreams: 1 tese_8065_tese graziela menezes.pdf: 1074378 bytes, checksum: 88abf66dc4c3e9d660983e97e0eb9f47 (MD5) Previous issue date: 2015-10-22 / O debate sobre a identidade nacional peruana, iniciado no século XIX, teve como ponto central a discussão do papel dos indígenas, considerado por alguns um problema e, por outros, a verdadeira fonte da cultura nacional. Nesse contexto, destacou-se o pensamento do escritor e etnógrafo José Maria Arguedas, conhecido por representar em suas obras a cultura andina e os conflitos sociais na relação entre brancos e índios. Por essa característica, seus trabalhos foram considerados como parte da corrente literária Indigenista. Em nossa pesquisa temos como objetivo analisar a construção da identidade nacional peruana nos textos de Arguedas, partindo do pressuposto que sua concepção é em um primeiro momento filiada a concepção indigenista, para em seguida apresentar-se como um projeto político baseado na mestiçagem cultural. Nossas fontes serão, em sua maioria, os romances do autor.
319

Análise estrutural do depósito de Au e Cu da região de Paran - Peru

Pocay, Wagner Roberto Hansted [UNESP] 04 September 2009 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:26:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-09-04Bitstream added on 2014-06-13T19:54:18Z : No. of bitstreams: 1 pocay_wrh_me_rcla.pdf: 1521424 bytes, checksum: ef1c2253fe3e21410d7e20f0a10d157f (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Na cidade de Paran, província de Huaura–Peru, ocorre um depósito de Au e Cu, com caráter epitermal de média a baixa sulfetação. A área foi o objeto de estudo da presente dissertação de mestrado, onde foram mapeadas as rochas aflorantes em escala 1:5.000. Neste trabalho são apresentados os resultados dos estudos petrográficos das encaixantes, representadas essencialmente por seqüências vulcânicas intermediárias, havendo também a presença de rochas intrusivas de caráter básico. A paragênese mineral dos veios mineralizados também foi objeto de estudo deste trabalho. Devido à área estar localizada em uma região de intenso tectonismo, o estudo e a caracterização das diversas estruturas foi efetuado a fim de definir qual sua influencia no minério. O estudo de paleo-esforço também foi alvo desta dissertação a fim de melhor caracterização das tensões atuantes na área e definir um modelo tectônico para o depósito. Com o trabalho realizado foi possível individualizar melhor os litotipos, reconhecer um complexo arranjo estrutural formado por três famílias de fraturas distintas cuja cinemática das duas principais famílias (NE e SW) foram obtidas e distinguir que os dois sistemas de veios principais são gerados em eventos tectônicos distintos / In the city of Paran, Huaura province, Peru, occurs a deposit of Au and Cu, with epithermal character from médium to low sulphidation. The área was the object of study of this dissertation, where the outcrop rocks have been mapped in scale of 1:5.000. This master work presents the results of petrographic studies of hosted rocks of the mineralization, represented mainly by intermediate volcanic sequences, also with the presence of intrusive rocks of basic to intermediate character. The mineral paragenesis of the mineralized veins was also the subject of this study. Given the fact that the area is located in a region of intense tectonic plates, the study and characterization of various structures was carried out to define what is it influence in the ore. The study of paleo-stress was also the object of this dissertation in order to better characterize the stresses acting in the area and set a tectonic model for the deposit. In the end, it was possible to identify the best rock types, to recognize a complex structural arrangement consisting of three distinct fracture families whose kinematics of the two main fracture families (NE and SW) were obtained and it was possible to identify that both systems of veins were generated in different tectonic events
320

Elementos estruturais relacionados com a mineralização do eoceno - oligoceno entre Mollebamba e Santo Domingo região de Apurimac, sul do Peru

Huachaca, Hugo Rubén Mamani [UNESP] 17 June 2014 (has links) (PDF)
Made available in DSpace on 2015-09-17T15:24:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-06-17. Added 1 bitstream(s) on 2015-09-17T15:47:49Z : No. of bitstreams: 1 000845972.pdf: 10093285 bytes, checksum: 4b3f81cedfdb7f2e6f2f0eabaf1a1822 (MD5) / A área de estudo se localiza nos Andes Centrais, ao sul da Deflexão de Abancay, Peru, inserida na província metalogenética (Andahuaylas-Yauri) relacionada ao Batólito de Abancay, que hospeda depósitos do tipo pórfiro-skarn de Fe-(Cu-Au) e depósitos filoneanos de Au. É constituída por sequências clásticas e carbonatadas de idades mesozóicas, intrudidas por plutons e stocks de monzonito e granodiorito que, por sua vez, são sobrepostos por rochas vulcânicas oligomiocênicas relacionadas com mineralização auroargentífera na porção sudeste da região. Neste trabalho apresenta-se um estudo do quadro geológico regional aliado à análise do padrão estrutural da região entre Sabaino e Santo Domingo, com a caracterização da cinemática de sistemas de falhas de cinco setores dessa área, onde ocorrem mineralizações, abrangendo medidas de 119 falhas mesoscópicas com estrias, a partir das quais obteve-se os tensores de esforços relacionados com o estágio sin-mineralização. Três dos setores estudados (Chama, Cocorpiña, Huaychulo) estão associados a falhas reversas de direção NNE, enquanto no setor Santo Domingo os veios mineralizados estão condicionados por falhas normais NE, indicando processos tectônicos diversificados para o controle estrutural destes depósitos. Para as mineralizações nos Setores Chama, Cocorpiña e Huaychulo assume-se o período de 40 a 32 Ma, pois estão associadas ao segundo estágio de intrusão do Batólito de Abancay. No setor Mollebamba a mineralização está associada a pórfiro de Cu-Au, (Ponto Trapiche) cuja idade deve corresponder a 29.17 Ma. No setor Santo Domingo os veios auríferos provavelmente são contemporâneos aos veios da jazida Selene datada em 14.62 Ma. O estudo ao longo da área permite identificar, como principais estruturas um Sistema de Dobras NS, que indica uma fase compressiva envolvendo encurtamento aproximadamente E-W, e duas grandes dobras registradas na área... / The study area is located in the Central Andes, south of the Abancay deflection, Peru, is inserted in the (Andahuaylas-Yauri) metallogenic province related to this Abancay batholith, which hosts porphyry-type deposits of skarn Fe-(Cu-Au) and load Au Deposits. It is constituted by clastic and carbonate sequences of Mesozoic age, intruded by granodiorite monzonite plutons and stocks that are overlain by oligomiocenic volcanic rocks related with epithermal gold and silver mineralization in the southeastern part of the region. This paper presents a study of the regional geological setting combined with the analysis of structural pattern in the region between Sabaino and Santo Domingo, with the kinematics characterization of five sectors in the area, where mineralization occurs controlled by fault systems. The analysis includes measures of 119 mesoscopic faults with striations, from which was obtained the stress tensor associated with the sin-mineralization stage. Three of the studied sectors (Chama Cocorpiña, Huaychulo) are associated with reverse faults of NNE, while in Santo Domingo sector the mineralized veins are conditioned by normal faults NE, pointing to diverse tectonic processes for the structural control of these deposits. For mineralization in the sectors Chama, Cocorpiña and Huaychulo is assumed the period 40-32 Ma, as they are associated with the second stage intrusion of Abancay batholith. In Mollebamba sector, the mineralization is associated with porphyry Cu-Au (Trapiche Point) whose age corresponds to 29.17 Ma. In the Santo Domingo sector, the auriferous veins are probably contemporary with the veins of the Selene deposit of age 14.62 Ma. The main large structures identified in the area are a NS fold system, which indicates a compressive phase involving shortening approximately EW, and another system represented by two large folds, the Chapi Chapi Anticline and Huillullu Syncline, which have axial planes parallel to the...

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