scholarly journals MINERALIZAÇÃO DE Fe-Ti-V ASSOCIADA AO GABRO MARCOS DA COSTA (MIGUEL PEREIRA), ESTADO DO RIO DE JANEIRO

2018 ◽  
Author(s):  
Ronaldo Mello Pereira ◽  
Marcelo Salomão ◽  
Reiner Neumann ◽  
Paulo Guimarães ◽  
Enrico Pedroso
Keyword(s):  
Magnetic Susceptibility ◽  
Rio De Janeiro ◽  
The State ◽  
The Body ◽  
Total Weight ◽  
Chemical Analyses ◽  
Primary Flow ◽  
Basal Portion ◽  
Mineral Concentrations ◽  
Janeiro State

O Gabro Marcos da Costa, localizado em Miguel Pereira, é mais um dos registros de rochas gabroides encontrados no estado do Rio de Janeiro. O corpo tem formato lenticular, 2,7 km2 de área aflorante, é estruturalmente isotrópico e sem presença visível de texturas primárias como a orientação por fluxo ou cumuláticas. Amostras do gabro foram submetidas a análises químicas e medidas de susceptibilidade magnética (SM). Possui caráter toleítico, com trend de enriquecimento em Fe. A ambientação tectônica é do tipo intraplaca e possível geração a partir de magma basáltico de alto-Ti (>3% TiO2). Os teores em TiO2 e V em rocha total são equiparáveis aos encontrados em gabros que encerram mineralizações em Fe-Ti-V. Ilmenita e magnetita, geralmente vanadinífera, são os principais minerais opacos e encontram-se disseminadas na rocha. A composição química da magnetita determinada em MEV-EDS varia de: 90,23% a 98,77% de FeOt, 0,07% a 0,42% de TiO2 e 0,59% a 2,13% de V2O5. Os valores de SM medidos em afloramentos estão entre -0.44 x10-4 a 89.4 x10-4 SI-emu. Em afloramento, por meio dessas medidas de SM, percebe-se a presença de níveis e bandas centimétricas aonde a concentração de minerais ferromagnéticos chega a até 22% em peso e interpretadas como estratificação magmática. As maiores concentrações de minerais ferromagnéticos ocorrem na parte setentrional do corpo aqui considerada como a porção basal da câmara magmática.Palavras Chave: mineralização de Fe-Ti-V, gabro, Rio de Janeiro, magnetita vanadiníferaAbstract:Fe-Ti-V MINERALIZATION ASSOCIATED WITH GABRO MARCOS DA COSTA (MIGUEL PEREIRA), RIO DE JANEIRO STATE. Marcos da Costa Gabbro, located in Miguel Pereira city, is one of the records of gabbroid rocks found in the state of Rio de Janeiro. The body is lenticular shape, with 2.7 km² outcrops, structurally isotropic and without visible presence of primary flow or cumulate textures. Gabbro samples were submitted to chemical analyses and magnetic susceptibility measurements (MS). Its character is toleithic, with trend of enrichment in Fe. The tectonic ambiance is intraplate type, with possible generation from basalt with high-Ti (> 3% TiO2). The TiO2 and V contents are comparable to those found in gabbros containing Fe-Ti-V mineralizations. Ilmenite and magnetite, usually vanadiniferous, are scattered in the rock. The magnetite contents determined in SEM-EDS vary from: 90.23% to 98.77% of FeOt, 0.07% to 0.42% of TiO2 and 0.59% to 2.13% of V2O5. MS values range from -0.44 x10-4 to 89.4 x10-4 SI-emu. Levels and centimeter bands with high MS exhibit ferromagnetic mineral concentrations of up to 22% of total weight and were interpreted as magmatic layering. The highest concentrations of ferromagnetic minerals occur in the northern part of the body here regarded as the basal portion of the magma chamber.Keywords: Fe-Ti-V mineralization, gabbro, Rio de Janeiro, vanadiferous magnetite

scholarly journals Fe-Ti-V ASSOCIADO AO GABRO DE LÍDICE, ESTADO DO RIO DE JANEIRO

2016 ◽  
Author(s):  
Ronaldo Mello Pereira ◽  
Marcelo dos Santos Salomão ◽  
Reiner Neumann ◽  
Paulo Guimarães ◽  
Enrico Pedroso
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Rio De Janeiro ◽  
Chemical Analyses ◽  
Ti Oxides ◽  
Icp Ms ◽  
Opaque Minerals ◽  
Titanium Vanadium ◽  
Janeiro State

ResumoO Gabro de Lídice corresponde a um corpo tabular, com cerca de 4,0 quilômetros de extensão e espessura entre 100 e 200 metros, constituído por hiperstênio, diopsídio, olivina, plagioclásio e minerais opacos (óxidos de Fe e Ti). Assinaturas petrográfica e geoquímica indicam caráter toleítico, entre os campos alcalino e subalcalino. O enriquecimento em V é de 2 a 3 vezes maior do que o clarck esperado para tal tipo de rocha. O principal óxido é a titanomagnetita, com inclusões e exsoluções de ilmenita. O vanádio concentra-se principalmente na titanomagnetita, variando os teores entre 0,68% e 2,07% de V2O5. Análises ICP-MS em pré-concentrado de titanomagnetita forneceram teores de 50,86% de Fe2O3t, 13,56% de TiO2 e 3.721 ppm de vanádio (~ 0,66% de V2O5). Quimicamente a ilmenita tem conteúdo em Fe2O3t (46,75% a 48,80%) e TiO2 (49,99% a 51,36%). Amostras enriquecidas em titanomagnetita exibem valores dos elementos terras raras e traço 30 vezes inferiores aos observados nas demais amostras. Ao longo de todo o corpo, a susceptibilidade magnética varia em escala centimétrica a decimétrica e está associada a concentrações anômalas de titanomagnetita na rocha, o que pode representar um bandamento magmático. Os dados apresentados sugerem uma origem associada a ambiente intraplaca.Palavras Chave: Gabro, titanomagnetita, ilmenita, titânio, vanádio.AbstractFe-Ti-V ASSOCIATED WITH LIDICE GABBRO, RIO DE JANEIRO STATE. The Gabbro of Lidice has about 4.0 km in length and thickness between 100 and 200 meters, consisting of pyroxene, olivine, plagioclase and opaque minerals (Fe and Ti oxides). Petrographic and geochemical signatures indicate toleitic character, between the alkaline and subalcalino fields. Vanadium enrichment is from 2 to 3 times higher than the expected clarck for such rock. The main oxide is titanomagnetite, with inclusions and exsolutions of ilmenite. Vanadium (0,68% to 2,07% V2O5) is mainly concentrated in titanomagnetite. ICP-MS analyses in pre-concentrated of titanomagnetite provided levels of 50.86% of Fe2O3t, 13.56% of TiO2 and 3,721 ppm of vanadium (~ 0.66% de V2O5). Chemical analyses of ilmenite show content in Fe2O3t (from 46.75% to 48.80%) and TiO2 (from 49.99% to 51.36%). Samples enriched with titanomagnetite display values of trace and rare earth elements 30 times lower than those observed in other samples. Throughout the gabbro, the magnetic susceptibility varies from centimeter to decimeter scales and is associated with abnormal concentrations of titanomagnetite, which may represent magmatic banding. The data presented may suggest an origin associated with intraplate environment.Keywords: Gabbro, titanomagnetite, ilmenite, titanium, vanadium.

scholarly journals Prevalence and factors associated with nutritional deviations in women in the pre-pregnancy phase in two municipalities of the State of Rio de Janeiro, Brazil

2014 ◽  
Vol 17 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Daniele Marano ◽  
Silvana Granado Nogueira da Gama ◽  
Rosa Maria Soares Madeira Domingues ◽  
Paulo Roberto Borges de Souza Junior
Keyword(s):  
Rio De Janeiro ◽  
Multinomial Logistic Regression ◽  
First Trimester ◽  
Overweight And Obesity ◽  
The State ◽  
The Body ◽  
Nutritional Risk ◽  
Institute Of Medicine ◽  
Cross Sectional ◽  
Factors Associated

OBJECTIVE: To assess the prevalence and potential factors associated with pre-pregnancy nutritional status of women. METHODS: This is a cross-sectional study carried out between December 2007 and November 2008 with 1,535 women in the first trimester of pregnancy and randomly selected in health units of the Brazilian public health system (SUS) in the municipalities of Queimados and Petrópolis in the State of Rio de Janeiro. The diagnosis of nutritional deviations was based on the Body Mass Index, according to the classification of the Institute of Medicine, and the following categories were obtained: underweight, normal weight, overweight and obesity. In the statistical analysis, the multinomial logistic regression model was used and an odds ratio and confidence interval of 95% were estimated. RESULTS: The sample included women between 13 and 45 years. The prevalence of underweight, overweight and obesity were 10, 18 and 11%, respectively. Women living in Queimados, adolescents, women who did not live with a partner and smokers had a higher proportion of low pre-pregnancy weight. There was an association between hypertension, overweight and obesity. Adolescents presented lower chance to overweight and obesity. Living in Queimados reduced the odds of overweight. CONCLUSION: The proportion of pre-pregnancy nutritional deviations was high, and recognizing factors that lead to them is very important for an early identification of women at nutritional risk, with view to interventions to reduce the adverse effects of malnutrition on maternal and child health.

scholarly journals The remnants of restinga habitats in the brazilian Atlantic Forest of Rio de Janeiro state, Brazil: habitat loss and risk of disappearance

2007 ◽  
Vol 67 (2) ◽  
pp. 263-273 ◽  
Author(s):  
CFD. Rocha ◽  
HG. Bergallo ◽  
M. Van Sluys ◽  
MAS. Alves ◽  
CE. Jamel
Keyword(s):  
Habitat Loss ◽  
Rio De Janeiro ◽  
Conservation Status ◽  
Legal Protection ◽  
Field Work ◽  
The State ◽  
Conservation Units ◽  
Landsat 7 ◽  
Extensive Degradation ◽  
Janeiro State

"Restingas" (herbaceous/shrubby coastal sand-dune habitats) used to cover most of Rio de Janeiro State coast, and have suffered extensive degradation over the last five centuries. Using satellite images and field work, we identified the remaining restingas in the State, recording the factors that might cause their degradation. We used two mosaics of Landsat 7 scenes (spatial resolution 15 and 30 m) to map and evaluate preliminarly the remaining areas and conservation status. Each remnant area was checked in the field, degraded areas within it were mapped and subtracted from the remnants. We identified 21 restinga remnants totalling 105,285 ha. The largest and smallest restinga remnants were Jurubatiba (25,141 ha) and Itaipu (23 ha), respectively. We identified 14 causes of degradation. The most important were vegetation removal for housing developments, establishment of exotic plant species, change of original substrate, and selective removal of species of economic importance for the horticultural industry. All restingas had disturbed parts under strong pressure due to human activities. Due to intense habitat loss, and occurrence of endemic/threatened vertebrate species in restinga habitats, we strongly indicate the implementation of new conservation units to protect these fragile remnants. This habitat is steadily decreasing and most remnants lack legal protection. Therefore, under the current human pressure most of this unique habitat is likely to be lost from the State within the next few years.

scholarly journals Spontaneous poisoning by Leucaena leucocephalai in a goat from Rio de Janeiro State, Brazil

2008 ◽  
Vol 38 (2) ◽  
pp. 551-555 ◽  
Author(s):  
Paulo Vargas Peixoto ◽  
Ticiana Nascimento França ◽  
Bernardo Melo Cunha ◽  
Danielle Valadão Albernaz Mattos Tavares ◽  
Marilene Farias Brito
Keyword(s):  
Digestive Tract ◽  
Histological Examination ◽  
Rio De Janeiro ◽  
Hair Follicles ◽  
The State ◽  
Muscular Layer ◽  
Tropical Regions ◽  
Cardiac Muscles ◽  
Main Meal ◽  
Janeiro State

Poisoning of a goat by Leucaena leucocephalai (Leg. Mimosoideae) in the State of Rio de Janeiro, Brazil, is described. Fresh leaves of the plant were ingested as the animal's main meal for at least 4 months before it developed total alopecia. At necropsy the thyroid was moderately enlarged. Histological examination revealed a decrease in the number of hair follicles (empty or in telogenic phase), vacuolation of keratinocytes of the epidermis and hair follicles, and superficial and follicular hyperkeratosis. Myxedema was found between skeletal and cardiac muscles fibers, in the kidneys, and in the submucosa/muscular layer of the digestive tract. The thyroid follicles were enlarged and filled with copious amounts of colloid (colloidal goiter). Although L. leucocephala is common in several tropical regions, natural poisoning by this plant in goats seems to be rare. It is the first report about spontaneous poisoning in goats by L. leucocephala in Brazil.

scholarly journals Diagnóstico técnico-económico e plano de ação para o setor de rochas ornamentais no estado do Rio de Janeiro

1997 ◽  
Vol 20 ◽  
pp. 181-200
Author(s):  
Claudio Margueron ◽  
Cristiane Mendes Coelho
Keyword(s):  
Rio De Janeiro ◽  
Action Plan ◽  
Geographic Location ◽  
Distribution Channels ◽  
The State ◽  
Diagnostic Study ◽  
Market Requirements ◽  
Janeiro State

This article initially undertakes a diagnostic study of the Marble and Granite Industry in Brazil and in Rio de Janeiro State. It shows the main uses for marble and granite and describes the key problems faced by this mining-mineral bencficiation sector in Brazil and Rio de Janeiro: production, institutional, roads and ports infrastructure, low value of exports, Italian Cartel, knowledge of distribution channels, market requirements and technology. It also describes in detail the geographic location, reserves and production of marble and granite in the state of Rio de Janeiro and the export-import situation for Brazil and for Rio de Janeiro State. Finally in its conclusions this article presents an ACTION PLAN for the Marble and Granite Sector of the state of Rio dc Janeiro economy.

scholarly journals Pattern of Live Births in Rio de Janeiro State, Brazil, According to Robson Groups and the Kotelchuck Index Classification - 2015/2016

2020 ◽  
Vol 42 (07) ◽  
pp. 373-379
Author(s):  
Luciana Leite de Mattos Alcantara ◽  
Núbia Karla de Oliveira Almeida ◽  
Renan Moritz Varnier Rodrigues de Almeida
Keyword(s):  
Prenatal Care ◽  
Pregnant Women ◽  
Rio De Janeiro ◽  
Maternal Age ◽  
Descriptive Analysis ◽  
The State ◽  
Live Births ◽  
Robson Classification ◽  
Unified Health System ◽  
Janeiro State

Abstract Objective To investigate the patterns of hospital births in the state of Rio de Janeiro (RJ), Brazil, between 2015 and 2016; considering the classification of obstetric characteristics proposed by Robson and the prenatal care index proposed by Kotelchuck. Methods Data obtained from the Information System on Live Births of the Informatics Department of the Brazilian Unified Health System (SINASC/DATASUS, in the Portuguese acronym) databases were used to group pregnant women relatively to the Robson classification. A descriptive analysis was performed for each Robson group, considering the variables: maternal age, marital status, schooling, parity, Kotelchuck prenatal adequacy index and gestational age. A logistic model estimated odds ratios (ORs) for cesarean sections (C-sections), considering the aforementioned variables. Results Out of the 456,089 live births in Rio de Janeiro state between 2015 and 2016, 391,961 records were retained, 60.3% of which were C-sections. Most pregnant women (58.6%) were classified in groups 5, 2 or 3. The percentage of C-sections in the Robson groups 1, 2, 3, 4, 5 and 8 was much higher than expected. Prenatal care proved to be inadequate for women who subsequently had a vaginal delivery, had an unfavorable family structure and a lower socioeconomic status (mothers without partners and with lower schooling), compared with those undergoing cesarean delivery. For a same Robson group, the chance of C-section increases when maternal age rises (OR = 3.33 for 41–45 years old), there is the presence of a partner (OR = 1.81) and prenatal care improves (OR = 3.19 for “adequate plus”). Conclusion There are indications that in the state of RJ, from 2015 to 2016, many cesarean deliveries were performed due to nonclinical factors.

Three new species of Senegalia (Leguminosae-Mimosoideae) from the Atlantic Forest domain, Brazil

Phytotaxa ◽  
2019 ◽  
Vol 408 (1) ◽  
pp. 30-40
Author(s):  
VANESSA TERRA ◽  
FLÁVIA CRISTINA PINTO GARCIA
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Geographic Distribution ◽  
Rio De Janeiro ◽  
The State ◽  
Identification Key ◽  
Brazilian Species ◽  
Three New Species ◽  
Janeiro State

We describe, illustrate and compare three new Brazilian species of Senegalia from the Atlantic Forest domain: Senegalia atlantica, from Rio de Janeiro State; Senegalia rafinesqueana, from the state of Paraná; and Senegalia cupuliformis, from Bahia State. These species are morphologically most similar to S. tenuifolia and S. multipinnata, S. velutina, and S. kuhlmannii, respectively. Additionally, we provide an identification key to all Senegalia species that are morphologically similar to S. atlantica, S. rafinesqueana and S. cupuliformis and occur in the Atlantic Forest domain; we also provide comments on the geographic distribution and the flowering and fruiting period of S. atlantica, S. rafinesqueana and S. cupuliformis.

scholarly journals Arctiinae (Lepidoptera: Erebidae) in the state of Rio de Janeiro, Brazil

2016 ◽  
Vol 16 (2) ◽  
Author(s):  
Milena de Sousa Nascimento ◽  
Viviane Gianluppi Ferro ◽  
Ricardo Ferreira Monteiro
Keyword(s):  
Rio De Janeiro ◽  
New Records ◽  
The State ◽  
Northwestern Part ◽  
Vegetation Types ◽  
Field Sampling ◽  
Forest Remnants ◽  
Low Levels ◽  
High Beta ◽  
Janeiro State

This study describes the composition and distribution of the Arctiinae species (Lepidoptera: Erebidae) in Rio de Janeiro, generating the first list of Arctiinae species in the state. We assessed the variations in species composition and the different vegetation types in the municipalities of Rio de Janeiro. Data were collected primarily through surveys of museums and publication lists of species. We also conducted field sampling in March and September 2010. Of the 2,077 records covering 28 municipalities, 679 Arctiinae species were found in Rio de Janeiro state and were divided into two tribes and 220 genera. The location with the highest number of species recorded was Itatiaia, with 362 species, followed by Petrópolis and Angra dos Reis, with 320 and 306 species, respectively. Thirty-four percent (n = 230) of the species recorded were exclusive, i.e., occurred in only one location. The lowest dissimilarity values were observed between neighboring municipalities with the same type of plant formation, such as Petrópolis and Teresópolis (19%) or Itatiaia and Resende (24%). Some municipalities slightly further apart geographically, but with the same type of plant formation, also showed low levels of dissimilarity, for example, Petropolis and Resende (29%). However, most locations showed intermediate dissimilarity values of 40-60%, and in some cases, this figure rose to 96%. In the state of Rio de Janeiro, irrespective of its small geographical size and the predominance of a unique ecosystem, the Atlantic Forest shows a wide variation in relief, which may explain the high beta diversity values. Despite the large number of Arctiinae species recorded in Rio de Janeiro, few species were identified in areas with important forest remnants, such as Guapimirim, Nova Iguaçu, and Campos dos Goitacazes. Some regions of the northwestern part of the state were also subsampled. It is likely that new records of Arctiinae still exist in these locations, further increasing the list of Arctiinae species in Rio de Janeiro.

scholarly journals Orange rust in sugarcane: molecular identification in Rio de Janeiro State

2013 ◽  
Vol 39 (3) ◽  
pp. 207-210
Author(s):  
Carla Vanessa Borges Castro ◽  
Evaristo Vieira Mezavilla ◽  
Paulo Sergio Torres Brioso
Keyword(s):  
Control Strategy ◽  
Rio De Janeiro ◽  
Molecular Detection ◽  
The State ◽  
Infected Leaf ◽  
Agricultural Activities ◽  
Leaf Sample ◽  
Saccharum Spp ◽  
Puccinia Kuehnii ◽  
Janeiro State

Sugarcane (Saccharum spp.) cultivation is one of the major agricultural activities in the Brazilian states. This study aimed to molecularly identify the pathogen associated with rust in sugarcane cultivars in the state of Rio de Janeiro and to suggest a control strategy. Among the 14 PCR-tested cultivars, Puccinia kuehnii infection was identified for RB947520, RB92606, RB835486, RB72454, SP89-11I5, SP83-2847, both from infected leaf sample and from urediniospores. Puccinia kuehnii was not detected by PCR for the cultivars RB955971, RB951541, RB92579, RB867515, RB855536, SP91-1049, SP80-3280, SP80-1816. This is the first molecular detection of this fungus in the state of Rio de Janeiro for six of the 14 analyzed cultivars.

scholarly journals Anurofauna of an Atlantic Rainforest fragment and its surroundings in Northern Rio de Janeiro State, Brazil

2010 ◽  
Vol 70 (3 suppl) ◽  
pp. 871-877 ◽  
Author(s):  
M Almeida-Gomes ◽  
M Almeida-Santos ◽  
P Goyannes-Araújo ◽  
VNT Borges-Júnior ◽  
D Vrcibradic ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Abundant Species ◽  
The State ◽  
Forest Fragments ◽  
Forest Fragment ◽  
The North ◽  
Surrounding Matrix ◽  
Plot Sampling ◽  
Northern Portion ◽  
Janeiro State

We carried out a study on the anurofaunal community from an Atlantic Forest fragment (Monte Verde mountains) and the surrounding area in Cambuci municipality, Rio de Janeiro State, Brazil, which constitutes one of the largest fragments remaining in the largely deforested landscape of the northern portion of the State. We combined three sampling methods: plot sampling, transects and pit-fall traps. We recorded twenty species of amphibians, of which only eleven were found within the forest fragment (and five of these also occurred in the surrounding matrix). Two of the species recorded in the present study (Crossodactylus sp. and Ischnocnema cf. parva) may represent undescribed taxa. Our records expand the distribution range of one species (Scinax trapicheiroi) to the north, and fill a geographic distribution gap for another one (Ischnocnema oea). The estimated overall density of frogs living in the leaf litter of the fragment (based on results of plot sampling) was 3.1 individuals/100 m², with Haddadus binotatus being the most abundant species (2.4 individuals/100 m²). Comparisons of our data with those of other studies suggest that anuran communities in forest fragments ca. 1,000 ha or smaller may be severely limited in their richness, and often include a large proportion of species tolerant to open areas, such as many hylids. Our results show the importance of increasing knowledge about the anurofaunal community of the northern portion of the State of Rio de Janeiro and preserve the forest remnants that still exist in the region.

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