scholarly journals Mapeamento geológico do Pegmatito Alto do Tibiri: aspectos estruturais e mineralógicos

Author(s):  
Paulo Jedean Da Silva Araújo ◽  
Vinicius Anselmo Carvalho Lisboa ◽  
José Ramilson Dos Santos Oliveira

<p>The Alto Tibiri is a pegmatite body located in the southern region of the Rio Grande do Norte, in Parelhas city, geologically inserted in the Borborema Pegmatite Province and occur intruding the mica schists of the Seridó Formation. Currently, both mica and feldspar are commercially exploited in this pegmatite body. In the field missions, 39 outcrops were described, in each one the main texture and mineralogical aspects of the outcropping rock were described. The geological mapping has allowed us to distinguish two types of schists, based on content and size of the mineral phases. There is a garnet rich schists and other with a relevant cordierite content. The studied region shows narrow pegmatite dykes, composed of quartz, feldspar, muscovite and/or biotite and black tourmaline, these dikes were classified as homogeneous. It’s possible to observe in Alto Tibiri a well- defined mineral zoning, as follows: i) border area, marked by the abundance of muscovite; ii) Zone II, composed of quartz, feldspar and mica, in which the main mineral resources occur (tantalite, spodumene, apatite, etc.) and iii) quartz pockets. The observed mineral zoning is similar to that described as mixed traditional pegmatite bodies.</p>

2017 ◽  
Vol 26 (4) ◽  
pp. 427-432 ◽  
Author(s):  
Plínio Aguiar de Oliveira ◽  
Beatriz Riet-Correa ◽  
Pablo Estima-Silva ◽  
Ana Carolina Barreto Coelho ◽  
Bianca Lemos dos Santos ◽  
...  

Abstract Gastrointestinal parasites represent an important cause of reduced productivity of sheep worldwide. As anthelmintic are still the main control tool for these parasites, this work evaluated the efficacy of commercially available active principles in 22 sheep flocks in the southern region of Rio Grande do Sul, Brazil. In each farm 10 sheep were randomly distributed in seven groups with the following treatments: abamectin; albendazole; closantel; levamisole; monepantel; trichlorphon and no anthelmintic (control). All flocks showed resistance to at least three anthelmintics and in 20 farms only two products demonstrated efficacy for parasitic control. In two farms, there was no susceptibility to the six active principles tested. The results of this study provide evidence that the common commercially available anthelmintic are not assuring effective chemical control of gastrointestinal parasitic infections in ovine flocks in the southern region of Rio Grande do Sul. Monepantel, the newest introduced drug in the Brazilian market was not effective in 18% of the flocks tested, confirming that the parasitic resistance can be established quickly after the introduction of new molecules mainly when alternative program of parasite control is not performed.


2013 ◽  
Vol 43 (5) ◽  
pp. 878-883
Author(s):  
Jader Silva Lopes ◽  
Paulo Roberto Nogara Rorato ◽  
Tomás Weber ◽  
Ronyere Olegário de Araújo ◽  
Dionéia Magda Everling ◽  
...  

The objective of this study was to evaluate the genetic divergence among Nellore breed animals raised in 45 farms in the Southern Region of Brazil. The characteristic studied was weaning weight adjusted to 205 days of life (P205), from 10,874 animals sired by 425 bulls and 7,629 cows, collected between 1976 and 2001, and distributed in the states of Rio Grande do Sul (1,499), Santa Catarina (2,332) and Paraná (7,043). The animals were distributed by cluster analysis in eight genetic divergent groups, enabling this technique to be applied to organize the matings in order to obtain heterotic effect. The herd/farm groups were formed through the hierarchical Ward method, using the direct (VGD) and maternal (VGM) breeding values predicted by the REML method. The VGD of the animal accounted for 90% of the differences among herds, and the remaining 10% was attributed to differences in the VGM. On average, the P205 for the animals from inter-group mating was 1.4kg higher than those from intra-group mating, representing 2.4% of heterosis.


1986 ◽  
Vol 130 ◽  
pp. 5-8
Author(s):  
M Ghisler

The systematic investigation of the geology of Greenland for the State was continued in 1985 by the Geological Survey of Greenland (GGU). The investigations encompassed basic research and geological mapping as well as investigations in applied disciplines. Field work, mainly in the months of June, July and August, was carried out by seventy-five scientists and technicians, half of whom belong to the Survey's staff. In addition to the GGU parties several groups from other institutions worked in close collaboration with GGU. The areas of field activity reported on in 1985 are indicated on fig. 1. During 1985 the Survey was partly reorganised, and it is now built up of six main units: Department of Stratigraphy and Structural Geology, Department of Precambrian Geology, Department of Geochemistry, Department of Mineral Resources, Department of Petroleum Geology and Department of Glaciology and Glacial Geology. The administration, computing facilities and editorial staff are directly responsible to the Director.


Author(s):  
A. Jarna ◽  
A. Bang-Kittilsen ◽  
C. Haase ◽  
I. H. C. Henderson ◽  
F. Høgaas ◽  
...  

Geology and all geological structures are three-dimensional in space. Geology can be easily shown as four-dimensional when time is considered. Therefore GIS, databases, and 3D visualization software are common tools used by geoscientists to view, analyse, create models, interpret and communicate geological data. The NGU (Geological Survey of Norway) is the national institution for the study of bedrock, mineral resources, surficial deposits and groundwater and marine geology. The interest in 3D mapping and modelling has been reflected by the increase of number of groups and researches dealing with 3D in geology within NGU. This paper highlights 3D geological modelling techniques and the usage of these tools in bedrock, geophysics, urban and groundwater studies at NGU, same as visualisation of 3D online. The examples show use of a wide range of data, methods, software and an increased focus on interpretation and communication of geology in 3D. The goal is to gradually expand the geospatial data infrastructure to include 3D data at the same level as 2D.


2018 ◽  
Vol 4 (6) ◽  
pp. 107
Author(s):  
Talita Gonçalves MEDEIROS ◽  
Marcio CAETANO

O presente estudo possuiu como objetivo interrogar e compreender as representações sobre a(s) lesbianidade(s) produzidas por estudantes de uma escola agrícola da região sul do estado do Rio Grande do Sul. A pesquisa, orientada pelos Estudos Culturais Lesbofeministas, produziu seus dados a partir de “rodas de conversas” complementadas por anotações no “diário de campo”. Partindo das análises dos dados, podemos apontar que as estudantes possuem visões e entendimentos conceituais a respeito da(s) lesbianidade(s) e que esses já possuem um posicionamento crítico frente à forma como a mulher é retratada na sociedade. Entretanto, a temática “lesbianidade(s)” – não diferente da forma como as demais mulheres são retratadas na escola-, é atravessada pela invisibilidade histórico-escolar e quando visível, ancora-se em representações mediadas somente pela violência.Lesbianidade(s). Escola. Diálogo. Lesbofeminismo.Obscure Things: representations of high school girls about lesbianity(s)AbstractThe present study aimed to interrogate and understand the representations about the lesbianity (ies) produced by students of an agricultural school in the southern region of Rio Grande do Sul state. The research, guided by the Lesbofeminist Cultural Studies, produced its data through "circles of conversation" supplemented by notes of the "field diary". From the analysis of the data, we can point out that the students have conceptual visions and understandings about the lesbian(s) and that they already have a critical position regarding the way in which the woman is portrayed in society. However, the theme of "lesbianity (ies)" - not unlike the way other women are represented in school - is crossed by the invisibility at school space and, when visible, is anchored in representations mediated only by violence.Lesbianity (s).School. Dialogue. Lesbofeminismo


Author(s):  
Arjun Bhattarai ◽  
Kabiraj Paudyal

Geological mapping was carried out along the Phalamdanda-Dhuwakot section of west-central Nepal in the Lesser Himalaya. The aim of geological mapping was to prospect the metallic mineral resources in the area especially to assess the geological control of mineralization as prognostic mapping and study the genesis of mineralization. The area has developed low-grade metamorphic rocks of the Nawakot Group. Geological rock units like the Kuncha Formation, Fagfog Quartzite, Dandagaon Phyllite, Nourpul Formation and Dhading Dolomite are mapped in the area. Jal Bhanjyang Thrust carries the more older rocks of the Nourpul Formation over the Dhading Dolomite. The area is highly deformed as indicated by presence of folds. Outliers of Fagfog Quartzite and Dhading Dolomite are developed at the core part of the syncline. Phalamdada iron and Anbu Khaireni as well as Dharapani copper are the major metallic deposits reported in the area. Both deposits are considered as the syngenetic in nature. Bulletin of Department of Geology, vol. 20-21, 2018, pp:59-64


2010 ◽  
Vol 57 (2) ◽  
pp. 151-154 ◽  
Author(s):  
I. M. Madrid ◽  
A. Mattei ◽  
A. Martins ◽  
M. Nobre ◽  
M. Meireles

2019 ◽  
Vol 39 (7) ◽  
pp. 460-468
Author(s):  
Bianca L. Santos ◽  
Fábio Raphael P. Bruhn ◽  
Ana Carolina B. Coelho ◽  
Pablo Estima-Silva ◽  
Joanna V. Echenique ◽  
...  

ABSTRACT: Rabies affects several domestic species, causing significant economic losses due to the death of animals in characteristic areas of the southern region of Rio Grande do Sul. In this context, this work aimed to study the epidemiology of rabies outbreaks observed in cattle from January 2008 to December 2017, through its space and time distribution in the southern region of Rio Grande do Sul. We performed an observational and ecological retrospective through the analysis of data recorded in necropsy protocols performed in cattle at the “Laboratório Regional de Diagnóstico” of the “Universidade Federal de Pelotas” (LRD-UFPel). A descriptive data analysis aimed at evaluating the distribution of cases over time. The statistical analysis was performed with Gretl statistical software 1.9.12 (GNU Regression, Econometric, and Time-series Library). To the existence of stationarity was verified with the Dickey-Fuller test, considering a value of p<0.05. From January 2008 to December 2017, 1418 bovine diagnostic materials were received at the LRD-UFPel, and 160 outbreaks of rabies were confirmed in 160 farms located in the 24 municipalities of the LRD-UFPel area of influence. We observed 591 cattle out of a total of 25,886 infected with the virus. We conclude that rabies does not exhibit seasonality in the study region, with a tendency to decrease in frequency in the next years. The disease has an epidemic characteristic in most of the analyzed months (2012-2014), remaining endemic in the remaining period (2011, 2015 and 2016) with sporadic episodes of epidemics in these years. We also observed that as the incidence of the disease increased in the animals and in the properties, there was a geographical spread of the virus for the majority (54.16%) of the municipalities in the area of influence of the LRD-UFPel.


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