251 |
Sexual blinging of women : Alice Walker's african character tashi and issue of female genital cuttingBrum, Gabriela Eltz January 2005 (has links)
Este trabalho consiste em uma leitura das diferentes formas de representação que podem ser atribuídas à personagem Tashi, protagonista do romance Possessing the Secret of Joy (1992), da escritora negra estadunidense Alice Walker. Antes desta obra, Tashi já havia aparecido em dois romances de Walker, primeiro em The Color Purple (1982), como personagem periférica, e depois como menção em The Temple of my Familiar (1989). Com Tashi, surge a temática da prática da circuncisão feminina, ritual ao qual a personagem se submete no início da idade adulta. O foco de observação do trabalho se volta para a maneira na qual a revolta da autora é transformada em um meio de representação criativa. Walker utiliza sua obra abertamente como instrumento ideológico para que o tema da “mutilação genital” (termo utilizado pela autora) receba ampla atenção da mídia e da crítica em geral. O propósito da investigação é avaliar até que ponto o engajamento social da autora contribui de uma forma positiva em seu trabalho e até que ponto o mesmo engajamento o atrapalha. Para a análise das diferentes questões relacionadas ao tema de “female genital cutting” (FGC), termo que eu utilizo no decorrer da pesquisa, os trabalhos de críticas e escritoras feministas como Ellen Gruenbaum, Lightfoot-Klein, Nancy Hartsock, Linda Nicholson, Efrat Tseëlon e a egípcia Nawal El Saadawi serão consultados. Espero que esta dissertação possa contribuir como uma observação sobre como Alice Walker usa seu engajamento social na criação de seu mundo fictício. / This thesis provides a reading of the different forms of representation that can be attributed to the character Tashi, the protagonist of the novel Possessing the Secret of Joy (1992), written by the African American writer Alice Walker. Before this work Tashi had already appeared in two previous novels by Walker, first, in The Color Purple (1982) and then, as a mention, in The Temple of My Familiar (1989). With Tashi, the author introduces the issue of female circumcision, a ritual Tashi submits herself to at the beginning of her adult life. The focus of observation lies in the ways in which the author’s anger is transformed into a means of creative representation. Walker uses her novel Possessing the Secret of Joy openly as a political instrument so that the expression “female mutilation” (term used by the author) receives ample attention from the media and critics in general. The aim of this investigation is to evaluate to what extent Walker’s social engagement contributes to the development of her work and to what extent it undermines it. For the analysis of the different issues related to “female genital cutting”, the term I use in this thesis, the works of feminist critics and writers such as Ellen Gruenbaum, Lightfoot-Klein, Nancy Hartsock, Linda Nicholson, Efrat Tseëlon and the Egyptian writer and doctor Nawal El Saadawi will be consulted. I hope that this thesis can contribute as an observation about Alice Walker’s use of her social engagement in the creation of her fictional world. / Este trabajo consiste en una lectura de las diferentes formas de representación que pueden ser atribuidas al personaje Tashi, protagonista de la novela Possessing the Secret of Joy (1992), de la escritora negra norte-americana Alice Walker. Antes de esta obra, Tashi ya había aparecido en dos romances de Walker, primero en The Color Purple (1982), como personaje periferica y después como mención en The Temple of My Familiar (1989). Con Tashi, surge la temática de la circuncisión femenina, ritual al cual Tashi se somete en el principio de la edad adulta. El foco de observación del trabajo se vuelca sobre las maneras en las cuales la revuelta de la autora se tranforma en un medio de creación creativa. Walker utiliza su obra abiertamente como instrumento político para que el tema de la “mutilación genital” (termino utilizado por la autora) reciba amplia atención de los medios y crítica en general. El propósito de la investigación es evaluar hasta que punto el envolvimiento social de la autora contribuye positivamente o interfiere en el desarrollo de su trabajo. Para el análisis de las diferentes cuestiones relacionadas al tema de “female genital cutting” (FGC), termino utilizado por mi en el decorrer del trabajo, las obras de las críticas y escritoras feministas como Ellen Gruenbaum, Lightfoot-Klein, Nancy Hartsock, Linda Nicholson, Efrat Tseëlon y la egipcia Nawal El Saadawi serán consultadas. Deseo que el trabajo realizado pueda contribuir como una observación sobre como Alice Walker utiliza su envolvimiento social en la creación de su mundo fictício.
|
252 |
Grupo escolar professora Alice Paes: trajetória dos egressos e currículo escolar (Uberlândia- Minas Gerais 1965-1971)Rocha, Angélica Pinho Martins 28 August 2012 (has links)
This study is an investigation related to the search of social reason and objective of the Elementary School Professora Alice Paes, in Uberlândia- Minas Gerais, from 1965 to1971. Limiting the study to the initial years was due to its creation by the Decree 8176 from February 22, 1965, and ended in 1971, when the Elementary School, with that conception, was extinguished. The specific objectives of the study were: to indentify the motivation for building an elementary school in a peri-urban of the city; to delineate the social-economic profile of the public served by the school at that time; to analyze the teaching practices at the school. The sources analyzed were inserted in several portfolios, with images portraying the opening ceremony of the Elementary School Professora Alice Paes and the activities done by the students, donated notebooks, the Daily Attendance Book Record, and the Monthly Activities Summary of 1971, the Manual of the Elementary School Teacher, Cumulative School Record (documents collected at the referred school). The social reason for the Elementary School Professora Alice Paes was identified by analyzing the social-economic origin of the alumni and the schooling and Professional trajectory of each one of them using a structured interview. All subjects interviewed were from the popular layer, with no economic capital. One group of those interviewed found reason for that school, since it provided the necessary means for female students to have the aspired social ascension, by embodying the cultural capital transmitted by the family nucleus and by the educational institution, it was possible to mobilize this capital, acquiring the social capital and possessing a new habitus, breaking up with the initial social economic origin. In contrast, for another alumni group, the school had no reason, for it did not promote the acquisition of these capitals, resulting in that they remained in the original social group. The social objective of the Elementary School Professora Alice Paes, was studied by analyzing the curriculum of the school, where the primary objective of this institution was to form the civil subject, willing and able to serve the religion, the country and the work. However, the school was not able to transmit the same idea of civility, respect, and discipline to all students, since each subject represented a single identity; thus, for each student there should be a type of teaching to be applied in order to organize the classes in homogeneous parameters, which is the conclusion of this study. / Trata-se de uma pesquisa de mestrado, que teve como problemática a investigação do sentido e objetivo social do grupo escolar Professora Alice Paes, em Uberlândia- Minas Gerais, nos anos de 1965-1971. A delimitação do período inicial ocorreu em função da escola ter sido criada mediante o Decreto-Lei nº 8176 de 22 de fevereiro de 1965 e finda em 1971, pelo fato da modalidade de ensino grupo escolar ter sido extinta em ato no referido ano. Os objetivos específicos presentes na investigação foram: identificar quais as motivações para a construção do grupo escolar num local periférico da cidade; delinear o perfil sócioeconômico do público atendido pela escola no recorte temporal, analisar as práticas escolares empreendidas na instituição escolar. As fontes analisadas estavam inseridas nos diversos portfólios com imagens retratando a inauguração do Grupo Escolar Professora Alice Paes e as atividades realizadas pelos alunos, cadernos de donativos, o Livro de Frequência Diária e Resumo Mensal de Atividades de 1971, Manual da Professora Primária, Ficha Escolar Cumulativa, todos pertencentes a escola. O trabalho com as fontes foi pautado pelo diálogo contínuo entre teoria e empiria, de forma a problematizá-las, e não cristalizá-las como se fossem um arcabouço da realidade. A destituição de capital econômico, cultural e social, por parte de alguns discentes incidiram na permanência do indivíduo na mesma esfera econômica que eram oriundos: camada sócioeconômica baixa. Sem a aquisição do capital cultural promovido pela escola e núcleo familiar, o egresso não pôde adquirir bons modos, não teve conhecimento da leitura e escrita culta, o que impossibilitava o acesso ao capital social, constituído por pessoas influentes. Dessa forma, a escola não teve nenhum sentido para esses egressos, pois não promoveu a aquisição desses capitais aos mesmos, propiciando a permanência desses no mesmo grupo social que eram oriundos quando estudantes no grupo escolar Professora Alice Paes; ao contrário do que ocorreu com algumas alunas, embora destituídas de capital econômico, adquiriram o capital cultural repassado pela família e a instituição educacional, de posse do capital cultural, houve a mobilização desse capital, para adquirir o capital social e deter um novo habitus, rompendo com a origem sócioeconômica inicial. Para essas ex alunas, a escola teve sentido, pois possibilitou os meios necessários para que as alunas tivessem a ascensão social necessária. O objetivo social do grupo escolar Professora Alice Paes era formar o sujeito cívico, disposto e apto a servir a religião, a pátria e o trabalho. Porém a escola,não conseguiu transmitir a mesma ideia de civilidade, respeito, disciplina a todos os alunos, pois cada sujeito apresentava uma identidade singular, dessa forma, para cada estudante haveria um tipo de ensino a ser viabilizado, a forma de organizar as classes em parâmetros homogêneos endossa essa conclusão. / Mestre em Educação
|
253 |
Řízení a poskytování služeb ve zvolené neziskové organizaci / Proceedings and Rendition of Services in Specific Non-profit AssociationKLEMENT, Vladimír January 2007 (has links)
This thesis is about a Non Government Organisation (NGO) whose main focus is on professional and home care services. The ``Alice{\crqq}, which is part of the Czech Red Cross in České Budějovice, has been supplying these services since 1994. The aim of this thesis is to analyse the historical development of ``Alice{\crqq}, looking closely at the quality of the service it offers. The next aim is to ``compare clients{\crqq} requirements against the potential the organization and to suggest certain improvements that can be made in the services, which would lead to higher quality and greater efficiency.
|
254 |
Sexual blinging of women : Alice Walker's african character tashi and issue of female genital cuttingBrum, Gabriela Eltz January 2005 (has links)
Este trabalho consiste em uma leitura das diferentes formas de representação que podem ser atribuídas à personagem Tashi, protagonista do romance Possessing the Secret of Joy (1992), da escritora negra estadunidense Alice Walker. Antes desta obra, Tashi já havia aparecido em dois romances de Walker, primeiro em The Color Purple (1982), como personagem periférica, e depois como menção em The Temple of my Familiar (1989). Com Tashi, surge a temática da prática da circuncisão feminina, ritual ao qual a personagem se submete no início da idade adulta. O foco de observação do trabalho se volta para a maneira na qual a revolta da autora é transformada em um meio de representação criativa. Walker utiliza sua obra abertamente como instrumento ideológico para que o tema da “mutilação genital” (termo utilizado pela autora) receba ampla atenção da mídia e da crítica em geral. O propósito da investigação é avaliar até que ponto o engajamento social da autora contribui de uma forma positiva em seu trabalho e até que ponto o mesmo engajamento o atrapalha. Para a análise das diferentes questões relacionadas ao tema de “female genital cutting” (FGC), termo que eu utilizo no decorrer da pesquisa, os trabalhos de críticas e escritoras feministas como Ellen Gruenbaum, Lightfoot-Klein, Nancy Hartsock, Linda Nicholson, Efrat Tseëlon e a egípcia Nawal El Saadawi serão consultados. Espero que esta dissertação possa contribuir como uma observação sobre como Alice Walker usa seu engajamento social na criação de seu mundo fictício. / This thesis provides a reading of the different forms of representation that can be attributed to the character Tashi, the protagonist of the novel Possessing the Secret of Joy (1992), written by the African American writer Alice Walker. Before this work Tashi had already appeared in two previous novels by Walker, first, in The Color Purple (1982) and then, as a mention, in The Temple of My Familiar (1989). With Tashi, the author introduces the issue of female circumcision, a ritual Tashi submits herself to at the beginning of her adult life. The focus of observation lies in the ways in which the author’s anger is transformed into a means of creative representation. Walker uses her novel Possessing the Secret of Joy openly as a political instrument so that the expression “female mutilation” (term used by the author) receives ample attention from the media and critics in general. The aim of this investigation is to evaluate to what extent Walker’s social engagement contributes to the development of her work and to what extent it undermines it. For the analysis of the different issues related to “female genital cutting”, the term I use in this thesis, the works of feminist critics and writers such as Ellen Gruenbaum, Lightfoot-Klein, Nancy Hartsock, Linda Nicholson, Efrat Tseëlon and the Egyptian writer and doctor Nawal El Saadawi will be consulted. I hope that this thesis can contribute as an observation about Alice Walker’s use of her social engagement in the creation of her fictional world. / Este trabajo consiste en una lectura de las diferentes formas de representación que pueden ser atribuidas al personaje Tashi, protagonista de la novela Possessing the Secret of Joy (1992), de la escritora negra norte-americana Alice Walker. Antes de esta obra, Tashi ya había aparecido en dos romances de Walker, primero en The Color Purple (1982), como personaje periferica y después como mención en The Temple of My Familiar (1989). Con Tashi, surge la temática de la circuncisión femenina, ritual al cual Tashi se somete en el principio de la edad adulta. El foco de observación del trabajo se vuelca sobre las maneras en las cuales la revuelta de la autora se tranforma en un medio de creación creativa. Walker utiliza su obra abiertamente como instrumento político para que el tema de la “mutilación genital” (termino utilizado por la autora) reciba amplia atención de los medios y crítica en general. El propósito de la investigación es evaluar hasta que punto el envolvimiento social de la autora contribuye positivamente o interfiere en el desarrollo de su trabajo. Para el análisis de las diferentes cuestiones relacionadas al tema de “female genital cutting” (FGC), termino utilizado por mi en el decorrer del trabajo, las obras de las críticas y escritoras feministas como Ellen Gruenbaum, Lightfoot-Klein, Nancy Hartsock, Linda Nicholson, Efrat Tseëlon y la egipcia Nawal El Saadawi serán consultadas. Deseo que el trabajo realizado pueda contribuir como una observación sobre como Alice Walker utiliza su envolvimiento social en la creación de su mundo fictício.
|
255 |
Navalhanaliga = a poética feminista de Alice Ruiz / Navalhanaliga : the feminist poetics of Alice RuizMurgel, Ana Carolina Arruda de Toledo 16 August 2018 (has links)
Orientador: Luzia Margareth Rago / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas / Made available in DSpace on 2018-08-16T14:52:43Z (GMT). No. of bitstreams: 1
Murgel_AnaCarolinaArrudadeToledo_D.pdf: 2219053 bytes, checksum: c9fbf64042901c7f9af7533dd0171f5b (MD5)
Previous issue date: 2010 / Resumo: Esta pesquisa focaliza o trabalho artístico da poeta e compositora Alice Ruiz, buscando compreender como se dá a construção de sua subjetividade através de sua experiência e práticas estéticas. A proposta é fazer o levantamento e análise histórica dos textos feministas da poeta, assim como de seus poemas e letras de canções utilizando as categorias gênero, estéticas da existência, subjetividade e poética feminista. O trabalho se norteia metodologicamente pelas concepções da filosofia da diferença, em especial no pensamento de Michel Foucault e nos debates de gênero. / Abstract: This research focuses on the artistic work held by the poet and composer Alice Ruiz, trying to comprehend the ways of construction of her subjectivity through her self aesthetics practices and experience. I aim at investigating and analyzing of the poet's feminist writings, as also her poems and music lyrics, using such categories as gender, aesthetics of existence, subjectivity and feminist poetic. The work is methodologically guided by the conceptions of the philosophy of difference, in special on the thoughts of Michel Foucault and in the debates on gender. / Doutorado / Historia Cultural / Doutor em História
|
256 |
Préparation à l'étude du plasma de quarks et de gluons dans ALICE : le détecteur V0 et les résonances de masses dans le spectromètre à muons / Preparation of the study of the quark-gluon plasma in ALICE : the V0 detector and the low masses resonances in the muon spectrometerNendaz, Fabien 22 September 2009 (has links)
L'expérience ALICE au LHC va étudier dès 2010 le plasma de quarks et de gluons (QGP), état de la matière dans lequel les quarks et les gluons sont déconfinés. Le travail présenté ici a été effectué au sein de la collaboration ALICE, dans le but de préparer l'analyse des futures données expérimentales. Outre une approche théorique du QGP et de la symétrie chirale, nous y développons trois aspects expérimentaux : le sous-détecteur V0, l'étude des mésons de basses masses et la déconvolution. Tout d'abord, nous détaillons les mesures de luminosité et de multiplicité réalisables avec le V0. Ensuite, nous développons l'étude des dimuons dans le spectromètre à muons. Nous nous concentrons en particulier sur les mésons de basses masses : le rho, le omega et le phi. Enfin, nous présentons une façon d'améliorer les données du spectromètre : la déconvolution de Richardson-Lucy. / The ALICE experiment at LHC will study from 2010 the quark-gluon plasma (QGP), phase of the matter in which quarks and gluons are deconfined. The work presented here was done within the ALICE collaboration, for preparing the analysis of the incoming experimental data. Besides a theoretical approach of the QGP and of the chiral symmetry, we develop three experimental aspects: the V0 sub-detector, the study of the low mass mesons and the deconvolution. First, we detail the measures of luminosity and multiplicity that can be done with the V0. We then develop the study of the dimuons in the muon spectometer. We concentrate on the low masses mesons: the rho, the omega and the phi. Finally, we present a method for improving the spectrometer data: the Richardson-Lucy deconvolution.
|
257 |
Carrollova "Alenka v říši divů": korpusově stylistická perspektiva / A corpus stylistic perspective on Lewis Carroll's "Alice's Adventures in Wonderland"Hrdličková, Jana January 2015 (has links)
The goal of the present thesis is a corpus stylistic analysis of Alice in Wonderland (1865), and it presents the possibilities of using corpus methods in the study of literary texts. In the theoretical part, the thesis is concerned with an explanation of the words norm, foregrounding, deviance and prominence (Leech, 2008), which are key terms in stylistics. The text then focuses in detail on various concerns connected to keywords and clusters, which are investigated later on in the theoretical part. The relation of keywords to the reference corpus and aspects of the length and frequency of occurrence of clusters are analyzed. An important element in a corpus-based analysis is that it is supposed to decrease bias, as the researcher studies statistically based significant markers of the text. The next part of the thesis focuses on the position of Alice in Wonderland between other members of the children's literature of the Golden Age (Knowles & Malmkjaer, 1995), and the role of nonsense and non-observance of pragmatic principles of interaction in the text. The reference corpora are described and primary hypotheses stated. In the practical part, keywords are studied first. They are divided into part of speech categories and interpreted from the point of view of their role and mutual relations in the text....
|
258 |
[en] IRONY AND CITY STREETS: TWO YOUNG CONTEMPORARY WOMEN POETS / [pt] RISO E RUA: DUAS JOVENS POETAS CONTEMPORÂNEASROMULO COELHO LISBOA BASTOS 30 May 2017 (has links)
[pt] Partindo da discussão sobre o que se entende por poesia contemporânea, passando pelos possíveis recortes geracionais da segunda metade do século passado até a atualidade, esta dissertação analisa a obra de duas jovens poetas contemporâneas, Angélica Freitas e Alice Sant Anna, cujos livros de estreia foram publicados no século XXI. / [en] On the basis of the discussion concerning what is meant by contemporary poetry and what counts as a generation in the period from the mid twentieth century to the present, this thesis examines the work of two contemporary young women poets, Angélica Freitas and Alice Sant Anna, who published their first books in the twenty-first century.
|
259 |
A Woman's Territory: Female Protagonists in 21st Century Road Movie–Based Fairy Tale FilmsLackan, Ivana January 2016 (has links)
This paper closely examines fairy tale films with road movie components, in particular those films featuring female protagonists. The study’s objective is twofold: first, to further develop existing research on the road movie by exploring one of the lesser known constituents of this broad genre and, second, to address gaps in scholarly literature on road movies when it comes to themes in female-led trips and the characterization of travelling females.
Through a detailed analysis of the journeys of female characters in recent voyage-oriented fairy tale films—Peter Pan (P.J. Hogan, 2003), Alice in Wonderland (Tim Burton, 2010) and Tangled (Byron Howard and Nathan Greno, 2010)—the investigation shows that these new heroines significantly differ from those of old. Their travels are portrayed as being less difficult, and the traits that they exhibit while on the road, namely fearlessness, rationality and an undying optimism, are rather favourable when compared to those exhibited by former road heroines.
Although these protagonists still face characters who wish to impede their movement away from a domestic setting, it is demonstrated that the protagonists are ultimately successful in not only acquiring power in the surroundings that they find themselves in, but also in carrying over their goals and dreams to their own worlds upon their return, privileges that most former road heroines did not have. Ultimately, the study shows that females can be as efficient travellers as males, and in some cases are portrayed as even more competent than their male counterparts.
|
260 |
Genesis and zoning of silver-gold veins in the Beaverdell area, South-Central British ColumbiaWatson, Patricia Helen Wanless January 1981 (has links)
The Beaverdell silver, gold, lead, zinc, vein camp is located approximately 88 km south of Kelowna, in south-central British Columbia at 49.43° north latitude and 119.06° west longtitude. The camp has been a silver producer since the turn of the century and some gold was produced in the early part of the century. This thesis examines the deposits in the regional area and examines, in detail, zoning in the Lass vein system on Wallace Mountain, and represents the first comprehensive study of zoning and genesis of the veins. Galena-lead isotopes are examined within the regional setting of the deposits. Fluid inclusion, sulphur isotope, mineralographic and major and minor element zonation studies yield definitive information about the genesis of the deposits.
Granodiorite of the Westkettle batholith, probably Jurassic, underlies much of the area and has been Intruded by stocks of Tertiary quartz monzonite, such as the Beaverdell stock. Remnants of pendants and/or screens of Wallace Formation metamorphosed volcanic and sedimentary rocks, believed to be Permian, are contained in the granodiorite. Silver mineralization occurs in the Beaverdell mines on Wallace Mountain mainly within the West-kettle batholith. Numerous showing and old workings of silver and/or gold mineralization are found throughout the surrounding region. The gold-bearing veins at Carmi contain a different mineral assemblage than the silver-bearing veins on Wallace Mountain.
Galena-lead analyses of samples collected throughout the region fall
into two distinct clusters on the ²º⁶Pb/ ²º⁴Pb versus ²⁰⁷Pb/ ²⁰⁴Pb and
²⁰⁶Pb/²⁰⁴Pb versus ²⁰⁸Pb/²⁰⁴Pb diagrams. The first group is represented by
the Carmi gold veins and the second by the Beaverdell silver veins. Models
for the generation of lead in these deposits used Permian (0.27 Ga),
Jurassic (0.15 Ga) or Tertiary (0.05 Ga) ages of mineralization on the basis
of geological and K-Ar data. The model that is believed to be the best approximation of the system that formed these deposits assumes that the two groups of deposits formed at different times, under markedly different geological conditions. The parameters of this model indicate that:
1. the Carmi-type, gold-bearing vein mineralization is probably Jurassic and formed as a result of the intrusion of the Westkettle batholith, with the metamorphosed Wallace Formation as the probable lead source;
2. the Beaverdell-type, Silver-bearing vein mineralization is probably Tertiary and can be linked genetically to intrusions of that age, such as the Beaverdell stock;
3. ore fluid flow direction for the solutions that formed the Beaverdell-type mineralization was outward through the Westkettle batholith, away
from the Beaverdell stock.
Within the Lass vein system on Wallace Mountain, a distinctive, depth related, east-west zonation pattern in Au, Ag, Pb and Zn can be defined. Many of the other 11 elements analysed (Cu, Fe, Mn, Cd, Ca, Mg, Co, Ni, Hg, As, Sb) also show this pattern. Two zones are defined. The deeper portions of the orebody (at the east end of the vein system) contain high gold values, low silver values, and moderate to high zinc and lead values. High silver values, accompanied by moderate lead and zinc values, are found at a higher elevation in the system, in the western part of the vein system. Veins in the lower section have a greater average thickness than those in the western, upper section, and generally contain less gangue material.
Fluid inclusions in sphalerite and quartz samples from the Lass vein system can be divided into three groups based on their homogenization temperatures. These are:
Group 1: primary inclusion (with and without CO²), formed between 260°C and 310°C, from solutions with an average of 13 equivalent weight percent
NaCl;
Group 2: pseudosecondary inclusions formed between 230°C and 260°C, with
salinities from 0.6 to 14 equivalent weight percent NaCl;
Group 3: pseudosecondary and secondary inclusions formed between 180°C
and 220°C, from solutions containing 0.4 to 14 equivalent weight percent
NaCl.
Arithmetic means of salinities for pseudosecondary, and secondary inclusions are, respectively, 8 and 6 equivalent weight percent NaCl. Sulphur isotope thermometers calculated for sphalerite-galena pairs (268°C to 320°C) are in close agreement with temperatures of homogenization of primary fluid inclusions.
Seven stages of mineral paragensis can be recognized in the Lass vein system. Therfirst three stages (pyrite, arsenopyrite and dark sphalerite) are associated with the higher temperature, higher salinity, CO₂-bearing, primary inclusions. Pseudosecondary and secondary inclusions appear to be related to stages 4 to 6, which consist of galena, paler sphalerite, silver minerals and late quartz.
Estimated depths of formation, based on a system under hydrostatic pressure, fall into two groupings. The minimum estimated depths of formation for primary, group 1 inclusions average 720 m, while depths calculated for groups 2 and 3 overlap in range, with-averages of 370 m and 175 m.
The model-developed to explain the formation of this orebody accounts for the major and minor element zonation in the vein, the decreasing temperature, salinity and pressure (depth), and the loss of CO2 from the ore-forming fluid. The model explains two spatially distinct areas of mineralization represented by: 1. a zone of high temperature, high salinity, .arid" moderate pressure below a throttling point; and 2. a lower temperature, low salinity area caused by ground water mixing on the lower pressure side of the
throttling point. CO₂ is present in the system below the throttling point, but is not found in any inclusions in Groups 2 and 3, on the lower temperature side of the throttling point. The association of CO₂ with gold deposition, suggests that gold would be expected in those areas where CO₂ is present in some of the inclusions.
The definition of these two zones is critical for exploration. High silver values would not be expected to reappear further at depth to the east of the present workings, because this type of mineralization would only occur above the throttle point. Gold mineralization can be expected to continue for some time at depth if this model holds true. The abrupt change from the gold to the silver zone represents the throttle point in this model, and is highly visible in the major and minor element distribution patterns for the Lass vein system.
Several different analytical procedures have been shown to differentiate between the two types of vein mineralization in the Beaverdell area. The use of these methods for exploration and development would allow the determination of key parameters concerning mineralization prior to extensive development of a showing or property. The level within the hydrothermal system, and therefore the type of ore expected can be determined by fluid inclusion studies for the younger, Tertiary veins. The age of vein mineralization, and therefore, the type of mineralization, also can be predicted by the use of galena-lead isotope ratios. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate
|
Page generated in 0.0581 seconds