22 documents found, page 1 of 3
Modelagem prospectiva mineral com base em Lógica Fuzzy: avaliação do Distrito F...
Uchoa, Elenilton Bezerra; Duarte, Cynthia Romariz; Magini, Christiano; Mirianda, Mateus de PaulaRecently the state of Ceará, Brazil, has been an important iron ore producer and exporter, by Bandarra mine in Quiterianópolis city. In this city there are five known iron occurrences named Calixto, Bandarra, São Francisco, Olho D’água and Pintada. The Bandarra iron ore deposit produced and exported from Brazil to China about 1.2 million tonnes of iron ore with 60% content. These iron ore are located in Norther...
Diretrizes para aquisição e processamento de dados geofísicos magnetotelúricos:...
Uchoa, Elenilton Bezerra; Magini, Christiano; Castelo Branco, Raimundo Mariano Gomes; Silva, Nilton Cesar Vieira; Silva, Fabiano Mota daSince the 1950s, the magnetotellurics method (MT) has been widely used in mineral and oil prospecting (sedimentary basins), cratonic regions and recognitions of crustal-scale geological discontinuities. MT geophysical method consists of a passive technique that aims to investigate geoelectric characteristics of subsoil through the interaction between telluric currents and subsurface materials. The objective of ...
Petrografia e litoquímica das formações ferríferas bandadas da região de Quixer...
Veríssimo, César Ulisses Vieira; Magini, Christiano; Parente, Clóvis Vaz; Nogueira Neto, José de Araújo; Almeida, Afonso Rodrigues deTwo new occurrences of banded iron formations (BIF’s) had been identified in the regions of Quixeramobim and Boa Viagem, Ceará State. The occurrences are associated to the Neoarchean to Paleoproterozoic rocks of the Cruzeta Complex, whose Sm/Nd - TDM model ages vary between 2,3 and 3,2 Ga. The chemical analyses of major elements in six samples show a relatively simple chemical composition, with SiO 2 and Fe2O3 ...
Resíduo da mineração de calcário laminado na correção da acidez do solo e na nu...
Vasques, Victor Viana; Blum, Julius; Magini, Christiano; Marinho, Larissa MatosThe laminated limestone belonging to the Membro Crato of the Formação Santana, which composes the stratigraphy of the Bacia do Araripe, is commercially known as Pedra Cariri and has been exploited for more than 70 years as ornamental rock. In Nova Olinda – CE, its exploitation has caused a series of environmental impacts due to the high generation and stock waste in the locality. The objective of this research ...
Sustentabilidade ambiental da extração de áridos: a lavra de areia no canal ati...
Nobre Filho, Pedro Aguiar; Sabadia, José Antonio Beltrão; Duarte, Cynthia Romariz; Magini, Christiano; Nogueira Neto, José de AraújoThis study analyzes the environmental sustainability of sand extraction along the active bed of Canindé river, Paramoti municipality, Ceará. The mined material was sampled, characterized and qualified for use as aggregate in construction. The deposit was cubed, resulting in measured reserves, indicated and total one. The sand extraction is carried out continuously in the active bed of the Canindé river, since t...
Lateritas do Domínio Médio Coreaú - comportamento geoquímico de mantos lateríti...
Siqueira, Ana Cláudia de Abreu; Magini, Christiano; Dantas, Elton Luis; Fuck, Reinhardt Adolf; Sasaki, José MarcosIn this paper an evaluation is made over the geochemistry signature of major elements in lateritic rocks on the counties of Granja, Martinópole and Parazinho, Northwest of Ceará State. Geologically, the area is located in Médio Coreaú Domain, characterized by the Granja Complex, which is the geological basement of the region, composed by gneiss, granulites and migmatites, and supracrustal sequences formed by qu...
Planejamento de uso e gestão de trilha ecológica na cachoeira do Paraíso - Parq...
Abessa, Denis M. S.; Magini, Christiano; Souza, Felipe A. Z.; Traglia, Renato T.; Gomes, Cristal C.; Igarashi, Eglee S. G.; Santos, Mariany M. dosThe Paraíso Waterfall is situated in the Itinguçu State Park (PEIt), which is part of the mosaic of protected areas of Juréia-Itatins (Iguape, SP, Brazil). This waterfall receives intense visitation, especially during the summer months; thus, there is an urgent need for planning the public use, aiming to discipline the tourist activity. The present work consisted in evaluating the conditions of the trail that g...
A infraestrutura portuária e suas influências na sedimentação costeira na Vila ...
Magini, Christiano; Martins, Antonio Harildes Oliveira; Pitombeira, Erasmo da SilvaThe aim of this work using temporal images and profiles of beach line, is to show the effects of port buildings in sediment transport around the port of Pecém and coastal portion of the village of Pecém. The construction of the port, with an offshore portion, connected to the mainland by leaked structure, allows the transport of sediments. Through the analysis of satellite images and by constant monitoring carr...
Perfil dos visitantes na Cachoeira do Paraíso, Estação Ecológica Juréia-Itatins...
Abessa, Denis Moledo de Souza; Magini, ChristianoThe Jureia-Itatins Ecological Station has been used for tourism for at least 25 years, without any kind of planning or control, and in opposition to the objectives of this protected area. In this paper, the visitors profile was evaluated, by using structured questionnaires. The interviews were conducted between May and July 2004. Seventy visitors were interviewed, and the results showed that, in the majority, t...
Using bioassays and benthic community to evaluate the sediment quality at the e...
Seriani, Robson; Abessa, Denis Moledo de Souza; Romano, Priscilla; Pinna, Fernanda Voietta; Magini, Christiano; Silveira, Fabiana LimaThis work aimed to assess the quality of sediments from the estuary of the Itanhaém River using whole sediment toxicity tests with the burrowing amphipod Tiburonella viscana; and the analysis of the benthic community. Results showed that the sediments are preponderantly sandy, with low or absence of toxicity to T. viscana. The benthic community was poor, composed mainly by opportunistic organisms, including cap...