16 documents found, page 1 of 2
Weathering conditions evaluation of banded iron formations of Bonito Mine (Nort...
Fonteles, Helano Regis da Nóbrega; Pereira, Henrique Garcia; Veríssimo, César Ulisses VieiraThis research was focused on weathering conditions regarding Banded Iron Formations (BIF) ore exploitation at Bonito Mine. The database is stemmed from an exhaustive drilling program at the mining site. Therefore, hundreds of iron ore samples were assayed for Fe2O3, SiO2, Al2O3, P and Mn grades, and qualitative geotechnical data such as weathering grades, physical ore type, voids, and coring depth levels were c...
Hybrid multivariate typological model for the banded iron formations from the B...
Fonteles, Helano Regis da Nobrega; Veríssimo, Cesar Ulisses Vieira; Pereira, Henrique Garcia; Barbosa, Irla GonçalvesTypological ore delineation is a basic procedure that provides various bases in ore geology on which crucial developments rely on, in particular, those supporting mineral resource evaluation. To deal with several complex issues related to typological delineation of heterogeneous ore bodies, an unusual hybrid multivariate approach, based on a skillful combination of geochemical/geological knowledge and correspon...
Flood magnitudes in the Tagus River (Iberian Peninsula) and its stochastic rela...
Salgueiro, Ana Rita; Machado, Maria J.; Barriendos, Mariano; Pereira, Henrique Garcia; Benito, GerardoThis paper presents a new methodological approach in the analysis of the influence of the North Atlantic circulation on the flood magnitude of the Tagus River, the largest Atlantic draining river of the Iberian Peninsula. This methodology is based on Correspondence Analysis viewed as a qualitative regression tool. A daily scale database (sea level atmospheric pressure, river discharge, rainfall) was used for th...
Quantitative–spatial assessment of soil contamination in S. Francisco de Assis ...
Silva, Eduardo Ferreira da; Ávila, Paula Freire; Salgueiro, Ana Rita; Candeias, Carla; Pereira, Henrique GarciaThrough the years, mining and beneficiation processes produces large amounts of As-rich mine wastes laid up in huge tailings and open-air impoundments (Barroca Grande and Rio tailings) that are the main source of pollution in the surrounding area once they are exposed to the weathering conditions leading to the formation of AMD and consequently to the contamination of the surrounding environments, in particular...
Geophysical Characterization of a Potentially Mineralized Target in Copper Sulf...
Pereira, Henrique Garcia; Moreira, César Augusto [UNESP]; Ferreira, Francisco José Fonseca; Camarero, Pedro Lemos; da Silva, Vinicius Antunes FerreiraMade available in DSpace on 2022-04-28T19:40:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-08-01; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); This work describes the reconnaissance and detailed phases of a potential copper sulfide mineralized target situated between the Sul-Riograndense Shield and the Cama...
Analysis of Acid Drainage Flow Zones in a Rocky Massif in a Uranium Mine from S...
Camarero, Pedro Lemos [UNESP]; Moreira, César Augusto [UNESP]; Targa, Débora Andrade [UNESP]; Duz, Beatriz Guzzo [UNESP]; Pereira, Henrique GarciaMade available in DSpace on 2022-04-28T19:45:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; During its 13 years of non-continuous operation, the Osamu Utsumi Mine has generated serious environmental impacts. This mining complex is now attempting to decommission this uranium mine to reduce its environmental liabilities. As part of a hydrogeological analysis of the old Osamu Utsumi Mine pit area...
Integration of aerogammaspectrometric and ground electromagnetic data in a copp...
Pereira, Henrique Garcia; Ferreira, Francisco José Fonseca; Moreira, César Augusto [UNESP]Made available in DSpace on 2022-04-28T19:46:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-10-18; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); In the different phases of prospective campaigns for metallic minerals such as copper, Geophysics acts as a support tool both in the recognition of new exploratory targets...
Ground electromagnetic application in near surface investigation of a copper mi...
Bitencourt, Jorge da Cruz; Pereira, Henrique Garcia; Lima, José Pedro Rebés; Hansen, Marco Antonio Fontoura; Moreira, César Augusto [UNESP]Made available in DSpace on 2022-04-28T19:29:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01; The service and maintenance of industrial and civil construction demands in relation to mineral inputs stimulates research to the discovery of new mineral deposits or the expansion of known deposits. The inductive electromagnetic geophysical method (EM) is widely used in studies involving the research o...
GEOPHYSICAL-STRUCTURAL FRAMEWORK IN A MINERALIZED REGION OF NORTH WESTERNMOST C...
Pereira, Henrique Garcia; Fonseca Ferreira, Francisco Jose; Moreira, Cesar Augusto [UNESP]; Ferreira da Silva, Vinicius AntunesMade available in DSpace on 2022-04-28T17:20:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-04-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Airborne and ground magnetic and gravimetric maps provide important information about the spatial dist...
Geophysical-Structural Framework In A Mineralized Region Of Northwesternmost Ca...
Pereira, Henrique Garcia; Ferreira, Francisco José Fonseca; Moreira, César Augusto [UNESP]; da Silva, Vinicius Antunes FerreiraMade available in DSpace on 2021-06-25T10:27:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Airborne and ground magnetic and gravimetric maps provide important information about the spatial distribution of causative sources in the geological substrate. These sour...