2,123 research outputs found
Distribución de la alteración hidrotermal y mineralización (Ag-Pb-Cu-Zn) en la sección 53303350 del depósito Loma de La Plata, distrito Minero Navidad, Chubut
No full textFil: Rainoldi, Ana L. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mercado, Maximiliano. Universidad Nacional del Comahue. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: Mercado, Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pons, María J. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pons, María J. Universidad Nacional de Río Negro. Instituto de Investigación de Paleobiología y Geología. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: Franchini, Marta. Universidad Nacional del Comahue. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: Franchini, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rainoldi, Ana L. Universidad Nacional del Sur; ArgentinaLoma de la Plata es uno de los ocho depósitos del distrito Navidad (42°2’S –68°8’O) localizado en la Cuenca Cañadón Asfalto, provincia de Chubut. El depósito Loma de la Plata se ubica en el corredor estructural Argenta, al SO del distrito. Con 4500 t Ag y leyes promedio de 169 g/t Ag es considerado un depósito de clase mundial. Se presentan los resultados del estudio de 34 muestras obtenidas de 3 sondeos de la sección E-O 5303350
Cu (V-U) mineralization in Huincul Formation, Tordillos prospect, Neuquén Basin
No full textFil: Pons, María J. Universidad Nacional de Río Negro; ArgentinaFil: Pons, María J. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo; ArgentinaFil: Pons, María J. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Franchini, Marta B. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo; Argentina.Fil: Franchini, Marta B. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Giusiano, Adolfo E. Subsecretaría de Minería e Hidrocarburos; ArgentinaFil: Maydagán, Laura. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo; Argentina.Fil: Maydagán, Laura. Universidad Nacional del Sur; Argentina.Fil: Maydagán, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rainoldi, Ana L. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo; Argentina.Fil: Rainoldi, Ana L. Universidad Nacional del Sur; Argentina.Fil: Rainoldi, Ana L. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaTordillos is one of several stratiform copper deposits (V, U) of the Neuquén Basin, located in the northern sector of the Dorsal Huincul to the SW of anticlinal Sauzal Bonito. The deposit has an estimated total resource of 9.5 Mt and 0.42 % Cu grades with U (135-251 ppm) and V (250-980 ppm) anomalies. The mineralization is epigenetic and fills the secondary porosity of the permeable and bleached sandstones of the Huincul Formation. It consists of chalcocite with relict chalcopyrite and bornite and supergene Cu-V-U minerals (covellite, brochantite > malachite, copper wad-tenorite and cuprite, chrysocolla, Cu-KBa vanadates and urovanadates) always in contact with impregnations of bitumen. The textural evidences of dissolution of authigenic minerals (hematite-quartz-barite 1-calcite 1) and detrital grains and the chronological order of precipitation of new cements (clays-barite 2-pyrite-calcite 2-Cu sulfides-barite 3) in sandstones document a complex history for the formation of this deposit. The influx of several pulses of fluids (basinal waters rich in Ba, hydrocarbons, and brines with Cu chlorides) and their mixing with interstitial waters of the Huincul Formation, that contained sulfates, may have produced the mineralization. The Andean tectonics during the Miocene must have caused the breakdown of seals and the upward flow of these multiple fluids pulses from the reservoir into the sandstones and conglomerates of the Huincul Formation through preexisting structures of the Dorsal de Huincul.trueTordillos es uno de los numerosos depósitos de cobre (V-U) estratiformes de la Cuenca Neuquina y está ubicado en el sector norte de la dorsal de Huincul, al SO del anticlinal Sauzal Bonito. Presenta recursos de 9,5 Mt y una ley media de Cu de 0,42 % con anomalías de U (135-251 ppm) y V (250-980 ppm). La mineralización es epigenética y rellena la porosidad secundaria de las areniscas permeables, alteradas y decoloradas correspondientes a la Formación Huincul. Consiste en calcosina con calcopirita y bornita relícticas y minerales supergénicos de cobre, vanadio y uranio (covellina, brochantita > malaquita, copper wad-tenorita y cuprita, crisocola, vanadatos de Cu y urovanadatos de K y Ba), siempre en contacto con impregnaciones de bitumen. Las evidencias de disolución de los minerales autigénicos (hematita-cuarzo-baritina 1-calcita 1) y de los clastos y el orden cronológico de precipitación de nuevos cementos (arcillas-baritina 2-pirita-calcita 2-sulfuros de Cu-baritina 3) en las areniscas documentan una historia compleja para la formación de este depósito, dada por el ingreso de varios pulsos de fluidos (aguas cuencales saturadas en bario, hidrocarburos y salmueras ricas en cloruros que trasportaron cobre en solución) y su posible mezcla con las aguas intersticiales de la Formación Huincul que contenían sulfatos. La tectónica andina durante el Mioceno debió producir la ruptura de sellos y el ascenso de estos múltiples pulsos de fluidos desde las rocas reservorios hacia las areniscas y conglomerados de la Formación Huincul a través de estructuras preexistentes de la Dorsal de Huincu
Differential stability of 2'F-ANA*RNA and ANA*RNA hybrid duplexes: roles of structure, pseudohydrogen bonding, hydration, ion uptake and flexibility
No full text14 pags., 7 figs., 3 tabs.Hybrids of RNA with arabinonucleic acids 2′F-ANA and ANA have very similar structures but strikingly different thermal stabilities. We now present a thorough study combining NMR and other biophysical methods together with state-of-the-art theoretical calculations on a fully modified 10-mer hybrid duplex. Comparison between the solution structure of 2′F-ANA•RNA and ANA•RNA hybrids indicates that the increased binding affinity of 2′F-ANA is related to several subtle differences, most importantly a favorable pseudohydrogen bond (2′F-purine H8) which contrasts with unfavorable 2′-OH-nucleobase steric interactions in the case of ANA. While both 2′F-ANA and ANA strands maintained conformations in the southern/eastern sugar pucker range, the 2′F-ANA strand's structure was more compatible with the A-like structure of a hybrid duplex. No dramatic differences are found in terms of relative hydration for the two hybrids, but the ANA•RNA duplex showed lower uptake of counterions than its 2′F-ANA•RNA counterpart. Finally, while the two hybrid duplexes are of similar rigidities, 2′F-ANA single strands may be more suitably preorganized for duplex formation. Thus the dramatically increased stability of 2′F-ANA•RNA and ANA•RNA duplexes is caused by differencesin at least four areas, of which structure and pseudohydrogen bonding are the most important. © The Author(s) 2010. Published by Oxford University Press.Spanish Ministerio de Ciencia e Innovacion (grants
CTQ2007-68014-C02-02 to CG and BIO2009-10964 to
MO); Fundacion Marcelino Botin (grant to MO);
Canadian Institutes for Health Research (grant to
M.J.D.); Natural Sciences and Engineering Research
Council of Canada (postgraduate scholarship to
J.K.W.). Funding for open access charge: Canadian
Institutes for Health Research
Pb-Isotope and trace elements analyses by LA-Q ICPMS of Galena from Argentinian epithermal deposits: a preliminary analyses
No full textFil: Luna, Geraldine. Universidad Nacional del Sur; ArgentinaFil: Maydagán, Laura. Universidad Nacional del Sur. Instituto Geológico del Sur. Departamento de Geología; ArgentinaFil: Maydagán, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Mcfarlane, Christopher. University of New Brunswick. Department of Earth Sciences; CanadáFil: Lentz, David. University of New Brunswick. Department of Earth Sciences; CanadáFil: Bouhier, Verónica. Universidad Nacional del Sur. Instituto Geológico del Sur. Departamento de Geología; ArgentinaFil: Caffe, Pablo. Universidad Nacional de Río Negro. Instituto de Investigación de Paleobiología y Geologia; ArgentinaFil: Caffe, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rainoldi, Ana L. Universidad Nacional del Sur; ArgentinaFil: Rainoldi, Ana L. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pons, María J. Universidad Nacional de Río Negro. Instituto de Investigación de Paleobiología y Geologia; ArgentinaFil: Pons, María J. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fernández, María L. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: Franchini, Marta. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Geología y Petróleo. Centro Patagónico de Estudios Metalogenéticos; ArgentinaIn situ laser ablation quadrupole inductively coupled plasma-mass spectrometry (LA-Q- ICPMS) allows us to
obtain rapid, accurate, and precise Pb isotope measurements together with trace elements in galena (McFarlane et al., 2016). Recent investigations have shown that galena can host a broader range of elements than previously recognized, many of them (e.g., Ag, Bi, Se, Te) can be extracted as by-products of an ore containing galena and others (Sb, Cd, Tl) existas impurities (George et al., 2015).
Pb isotopic studies have been applied as a tool in exploration of metallogenic terrains based on comparing the isotopic compositions of existing deposits within a district to prospective showings. Bouhier et al. (2017) presented Pb isotopic data of the Navidad Ag world class epithermal deposit. These authors indicated that the Pb isotopic ratios of Jurassic volcanic rocks and ore minerals from epithermal deposits of Patagonia have distinctive signatures in the North Patagonian Massif, the Deseado Massif, and the Andean region that vary with time in the volcanic events of the Chon Aike Volcanic Province.
The objective of this contribution is to present new Pb isotopic data and trace elements obtained with the
method LA-Q-ICPMS in galena from epithermal deposits in Argentina in order to identify patterns at regional and local scales that may be useful in exploration or exploitation
Viajantes ex-cêntricas nas histórias de Ana Miranda
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Literatura.No conjunto das narrativas ficcionais da escritora brasileira Ana Miranda, a temática da viagem # considerada uma das mais férteis da literatura ocidental de todos os tempos # ocupa um espaço de centralidade, podendo até mesmo ser vista como o mais importante eixo de estruturação de suas obras. O estudo realizado pela presente tese tem por objetivo analisar o tratamento dado ao tema da viagem nos romances Desmundo, O retrato do rei, Dias & Dias e Amrik, evidenciando que por intermédio das narradora-viajantes # Oribela, Mariana, Feliciana e Amina # a autora promove um diálogo entre diferentes culturas, gêneros, etnias e gerações, ao mesmo tempo em que estabelece um profícuo diálogo com o passado em sua invariante problematização concernente aos limites e cruzamentos entre o discurso ficcional e os discursos narrativos extraliterários que o cercam, sobretudo o histórico e o biográfico. In the whole of Brazilian writer Ana Miranda#s fictional narrative, the travel thematic # considered one of the most fertile themes of the western literature of all times # occupies a central space, and can even been seen as the most important structuring axis of Miranda#s works. The aim of the present thesis is to analyze the treatment given to the travel subject in the novels Desmundo, O retrato do rei, Dias & Dias and Amrik, emphasizing that, through the traveling narrators, Oribela, Mariana, Feliciana and Amina, the author promotes a connection between different cultures, genders, ethnics and generations, at the same time that establishes a profitable dialogue with the past in her invariant problematization concerning the limits and crossings between the fictional and the extra-literary narrative discourses that surrounds it, mainly the historical and the biographic ones
Relación entre la mineralización del Cu y Biotumen en el prospecto La Cuprosa, Dorsal del Huincul, Neuquén
No full textFil: Paz, Maximiliano. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Pons, María J. .Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Pons, María J. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Giusiano, Adolfo. Subsecretaría de Minería e Hidrocarburos. Neuquén; ArgentinaFil: Cábana, Cecilia. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Franchini, Marta. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Franchini, Marta. Universidad Nacional del Comahue. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: González, Esteban. Universidad Nacional del Comahue. Facultad de Ingeniería. CEPCOM; ArgentinaFil: Impiccini, Agnes. Universidad Nacional del Comahue. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: Rainoldi, Ana L. Universidad Nacional del Sur. Centro Patagónico de Estudios Metalogenéticos; ArgentinaFil: Rainoldi, Ana L. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaLa Cuprosa is a Revett or sandstone sub-type sediment-hosted stratiform Cu deposit of the Portezuelo Formation (Neuquén Group), located over the Aguada Baguales oil field, Huincul Ridge. Its diagenetic story can be subdivided in: diagenesis, mineralization and telogenesis. During early diagenesis hematite and kaolinite precipitated from meteoric waters. Early oxidation of hydrocarbon in depth, rising CO2 and mixing with meteoric waters produced calcite I precipitation. The incoming of liquid hydrocarbons and redox reactions with the rock generated: clasts and previous cements dissolution, porosity increase, smectite ± chlorite and syntaxial micro-quartz cements, reduction of Fe3+ to Fe2+ to form pyrite (± chlorite), and later analcime and baroque calcite II precipitation. Circulation of slightly oxidizing, neutral, Cu-rich basinal brines could extract Cu from subjacent red beds and igneous rocks, transport it in solution, and precipitate Cu-Fe sulfides in contact with hydrocarbons. These sulfides replaced pyrite and generated partial iron remobilization to the periphery of the mineralization zone. Andean tectonic during the Miocene produced the telogenetic processes: calcite III formation, and Cu sulfides replacement by malachite> chrysocolla> azurite> brochantite? and pyrite by hematite> goethite. The bleaching distribution mapped by satellite imagery analysis and the zonation of the alteration can be utilized for hydrocarbon migration and similar stratiform Cu deposits studies.trueLa Cuprosa es un depósito de Cu estratiforme hospedado en rocas sedimentarias de la Formación Portezuelo (Grupo Neuquén) tipo Revett o sub-tipo sandstone, ubicado sobre el yacimiento hidrocarburífero Aguada Baguales, Dorsal de Huincul. Su historia diagenética puede subdividirse en: diagénesis, mineralización y telogénesis. Durante la diagénesis temprana se formaron los cementos de hematita y caolinita por la acción de aguas meteóricas. La oxidación temprana de hidrocarburos en subsuelo, el ascenso de CO2 y su mezcla con las aguas meteóricas produjo la precipitación de calcita I. El ingreso de hidrocarburos líquidos y las reacciones redox con la roca provocaron: disolución de clastos y cementos previos, aumento de porosidad, cementos de esmectita ± clorita y micro-cuarzo sintaxial, reducción de Fe3+ a Fe2+ para formar pirita (± clorita), y una posterior precipitación de analcima y calcita barroca II. La circulación de salmueras cuencales ligeramente oxidantes y de pH neutro pudo extraer el Cu de los estratos rojos y rocas ígneas subyacentes, transportarlo en solución, y en contacto con los hidrocarburos precipitar sulfuros de Cu y Fe. Los sulfuros reemplazaron a pirita y generaron removilización parcial del hierro hacia la periferia de la zona mineralizada. La tectónica andina durante el Mioceno produjo los procesos telogenéticos: formación de calcita III y reemplazo de sulfuros de Cu por malaquita> crisocola> azurita> brochantita? y de pirita por hematita> goethita. La distribución de la decoloración mapeada a partir de análisis de imágenes satelitales y la zonación de la alteración pueden ser utilizadas para el estudio de migraciones de hidrocarburos y depósitos de Cu estratiformes similare
NASKAH QAWA'IDU L-ISLAM WA L-IMAN (Suntingan Teks dan Kajian Pragmatik)
No full textMuna, Ana Fauzul. 2018. Qawa'idu l-Islam wa l-iman’s Manuscript (Editing teks and pragmatic studies). Skripsi. Faculty of Humanities, Diponogoro University. Leaders I Dr. M. Abdullah, M.A, II Drs. M. Muzakka, M.Hum.
Qawa'idu l-Islam wa l-iman’s Manuscript (QII) is the ancient manuscript who has an Arabic letter and Malay. QII is manuscript that saved in Nasional Library of Indonesian Republic with manuscript number BR 418. This manuscript has three teks among others: fiqh, Friday prayer, and tauhid. The author count heavely on the first teks which is fiqh.
This research has a purpose for present editing teks and explain advantage in teks based on pragmatic studies. The author use two theory among others: philology and pragmatic. This research use some methods which is: collection, analysis, and present the data inside. Data analysis divided in two part which is philology and pragmatic. And then the data presented by discriptive method.
The result of analysis from QII manuscript contain two function which is: religion function and education function. The religion function in QII manuscript contain pillars of Islam among others: Syahadat, prayer, obligatory charity, fasting, hajj trip. Thaharah include istinja, wudu, take a bath, menstruation, nifas, and tayamum. Pillars of faith is believe to Allah, while education function in the QII manuscript contain advice to study hard, pray when go and out from bathroom.
Key word: Qawa'idu l-Islam wa l-iman’s manuscript, philology, pragmatic
First person – Ana Cecilia Aliaga Fandino
No full textFirst Person is a series of interviews with the first authors of a selection of papers published in Biology Open, helping early-career researchers promote themselves alongside their papers. Ana Cecilia Aliaga Fandino is first author on ‘Reprogramming of the cambium regulators during adventitious root development upon wounding of storage tap roots in radish (Raphanus sativus L.)’, published in BIO. Ana conducted the research described in this article while a Master's student in Ji-Young Lee's lab at Seoul National University, Republic of Korea. She is now a PhD student in the lab of Christian Hardtke at the University of Lausanne, Switzerland, investigating developmental genetics in the root vascular system
On the sensitivity of Von Neuman and Morgenstern abstract stable sets : the stable and the individual stable bargaining set
No full textScientometric Portrait of Nobel Laureate S. Chandrasekhar
No full textScientometric analysis of the publications productivity of Nobel Laureate S. Chandrasekhar is documented
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