Gold Mineralization
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Dynamic anisotropy and non-linear geostatistics supporting short term modelling of structurally complex gold mineralization
Abstract Non-linear geostatistical methods are known to deal appropriately with the geological and geometrical complexity of gold deposits. This article reports the results related to an investigation to improve the gold content estimate based on restricted ore modeling to honor the structural aspects that control the mineralization. The grade domains are de
REM, Int. Eng. J.. Publicado em: 2021-06
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2. WOMEN’S FEMORAL MASS CONTENT CORRELATES TO MUSCLE STRENGTH INDEPENDENTLY OF LEAN BODY MASS
RESUMO Introdução Há pouco consenso em relação à recomendação sobre o exercício mais efetivo para a integridade óssea, apesar de o exercício com peso apresentar como respostas recorrentes o aumento da força e da massa muscular. Contudo, entre mulheres as variações da força não dependem do desenvolvimento da massa muscular, tanto quanto em h
Rev Bras Med Esporte. Publicado em: 11/11/2019
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3. Reconstruction of Precambrian terranes of Northeastern Brazil along Cambrian strike-slip faults: a new model of geodynamic evolution and gold metallogeny in the State of Bahia
Abstract The Precambrian basement of Northeastern Brazil is the product of Rhyacian block convergence. The main deformation and intrusion of crustal granitoids occurred between 2.15 and 1.8 Ga ago. This large area has been subjected to long-lasting and rather uniform stresses during the Cambrian period. Gold provinces in Bahia represent metallogenetic produc
Braz. J. Geol.. Publicado em: 21/10/2019
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4. The role of airborne geophysics in the investigation of gold occurrences in the Itapetim Region, Borborema Province, Northeast Brazil
Abstract We present a combined analysis of airborne geophysical data (magnetics and gamma-ray spectrometry) and field aspects of Itapetim lode gold district region, aiming to identify structurally deformed and hydrothermally altered zones, which are suggestive of gold mineralized sectors. The main geophysical lineaments are oriented in the NE-SW and E-W dire
Braz. J. Geol.. Publicado em: 22/08/2019
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5. Ore resource estimation based on radial based functions - Case study on União Luiz and Morro do Carrapato Gold Deposits (Alta Floresta Gold Province)
Abstract Radial basis functions can be used as an alternative method for mineral resource estimation when ordinary kriging cannot be done because it is impossible to calculate an experimental variogram. Interpolation based on radial based functions is a method that is similar to ordinary kriging. In this context, this article presents the results of gold res
REM, Int. Eng. J.. Publicado em: 19/06/2019
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6. Favorability potential for IOCG type deposits in the Riacho do Pontal Belt: new insights for identifying prospects of IOCG-type deposits in NE Brazil
ABSTRACT: Archean iron oxide-copper-gold (IOCG) deposits have been systematically described in the world class Carajás IOCG district, Amazonian region of Brazil. More recently, several Neoproterozoic (ca 1.13 to 0.96 Ga) IOCG deposits have been identified in the Riacho do Pontal mobile belt situated in the Borborema Province on the northern border of the S�
Braz. J. Geol.. Publicado em: 06/12/2018
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7. Geophysical modeling in gold deposit through DC Resistivity and Induced Polarization methods
Abstract Ore mining fundamentally depends on the definition of its tenor and volume, something extremely complex in disseminated mineralization, as in the case of certain types of deposits of gold and sulfites. This article proposes the use of electrical tomography for definition of a geophysical signature in terms of electrical resistivity and chargeability
REM, Int. Eng. J.. Publicado em: 2016-09
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8. Impacto de diferentes algoritmos e geometria de depósitos minerais no planejamento de longo prazo
The main objective of mine planning is to determine ore quantity and quality distribution along a time sequence, i.e., scheduling the ore necessary to make the project technically and economic viable. These temporal sequences are fundamental for the financial success of a mine activity and presently this optimal sequence can be obtained through various minin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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9. Mineralizações auríferas do lineamento Peru-Trairão Província Auríifera de Alta Floresta-MT : controle estrutural e idade U-Pb das rochas hospedeiras / Gold mineralization lineamento Peru-Trairão, Alta Floresta Gold Provinces (MT) : structural control and U-PB age host rock
No setor leste da Província Aurífera de Alta Floresta (PAAF) as mineralizações auríferas, em sua maioria, ocorrem em veios, sistemas de veios ou disseminados em rochas graníticas. A maioria dos depósitos encontra-se numa faixa NW-SE, com aproximadamente 30 km de largura e 140 km de extensão, denominada Peru - Trairão. Os filões nesta faixa são sub
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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10. Desenvolvimento de método eletroanalítico para determinação direta de cobre em biodiesel e monitoramento do metal em biodiesel exposto a condições simuladas de armazenamento
A simple, effective and low cost for copper determination in biodiesel, without decomposition of the sample is presented. The samples of biodiesel were diluted in a hydro-ethanolic solution (containing HCl as supporting electrolyte) generating a homogeneous ternary system (water-ethanol-biodiesel) in which copper was detected directly using potentiometric st
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2011
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11. Depósitos auríferos associados ao magmatismo granítico do setor leste da Província de Alta Floresta (MT), Craton Amazônico: tipologia das mineralizações, modelos genéticos e implicações prospectivas / Granitoid-related gold deposits in the Alta Floresta Gold Province (MT), Amazon Craton: ore-forming processes, genetic models and implications to exploration
A Província Aurífera de Alta Floresta, porção centro-sul do Craton Amazônico, localiza-se entre os limites das províncias geocronológicas Ventuari - Tapajós (1,95-1,8 Ga) e Rio Negro - Juruena (1,8-1,55 Ga). Corresponde a uma unidade tectônica essencialmente composta por sequências plutono-vulcânicas geradas em ambiente de arcos magmáticos que se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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12. Bone regeneration in surgically created defects filled with autogenous bone: an epifluorescence microscopy analysis in rats
Although the search for the ideal bone substitute has been the focus of a large number of studies, autogenous bone is still the gold standard for the filling of defects caused by pathologies and traumas, and mainly, for alveolar ridge reconstruction, allowing the titanium implants installation. OBJECTIVES: The aim of this study was to evaluate the dynamics o
Journal of Applied Oral Science. Publicado em: 2010-08