Search Results - "Oliveira, Saulo Pomponet"

Editorial for the Special Issue “Application of Geophysical Data Interpretation in Geological and Mineral Potential Mapping” by Luan Thanh Pham, Saulo Pomponet Oliveira, Cuong Van Anh Le

“…Geological structures often control the distribution of natural resources such as oil, gas, and minerals [...]…”
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Reliable Tilt-depth estimates based on the stable computation of the tilt angle using robust vertical derivatives by Abdelrahman, Kamal, Pham, Luan Thanh, Oliveira, Saulo Pomponet, Duong, Van-Hao, Duy, Thong Kieu, Gomez-Ortiz, David, Fnais, Mohammed S., Eldosouky, Ahmed M.

“…The Tilt-depth is a popular approach for determining depths of magnetic sources. As this method is based on the distance between contour levels of the tilt…”
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Gravity Data Enhancement Using the Exponential Transform of the Tilt Angle of the Horizontal Gradient by Luan Thanh Pham, Saulo Pomponet Oliveira, Cuong Van Anh Le, Nhung Thi Bui, An Hoa Vu, Duong Anh Nguyen

“…Detecting the boundaries of geologic structures is one of the main tasks in interpreting gravity anomalies. Many methods based on the derivatives of gravity…”
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Aeromagnetic data interpretation of the northern Kontum massif (Vietnam) for mapping subsurface structures by Pham, Luan Thanh, Oliveira, Saulo Pomponet, Duong, Hao Van, Abdelrahman, Kamal, Fnais, Mohammed S., Gomez-Ortiz, David, Nguyen, Dat Viet, Vo, Quynh Thanh, Kieu Duy, Thong, Eldosouky, Ahmed M.

“…The Kontum massif plays a key role in the tectonic development of the central Vietnam terrane. However, most of the northern part of the Kontum massif is…”
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Selection of Euler deconvolution solutions using the enhanced horizontal gradient and stable vertical differentiation by Pham, Luan Thanh, Oliveira, Saulo Pomponet, Abdelrahman, Kamal, Gomez-Ortiz, David, Nguyen, Dat Viet, Vo, Quynh Thanh, Eldosouky, Ahmed M.

“…Euler deconvolution is widely used for interpreting magnetic anomalies as it estimates the edges and depths of magnetic sources. Since this method was…”
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On the practical implementation of the enhanced horizontal derivative filter for potential field data by OLIVEIRA, Saulo Pomponet, BONGIOLO, Alessandra de Barros e Silva, PHAM, Luan Thanh, DE CASTRO, Luís Gustavo, JORGE, Vinicius Theobaldo

“…The enhanced horizontal derivative (EHD) is an enhancement filter whose maxima provide estimated locations of the sources' boundaries. This filter is defined…”
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A Numerical Comparison Between Quasi-Monte Carlo and Sparse Grid Stochastic Collocation Methods by dos Santos Azevedo, Juarez, Pomponet Oliveira, Saulo

“…Quasi-Monte Carlo methods and stochastic collocation methods based on sparse grids have become popular with solving stochastic partial differential equations…”
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Linearized seismic waveform inversion using a multiple re-weighted least-squares method with QR preconditioning by Porsani, Milton J., Pomponet Oliveira, Saulo

“…ABSTRACT Linearized inversion methods such as Gauss‐Newton and multiple re‐weighted least‐squares are iterative processes in which an update in the current…”
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A Stable Finite Difference Method Based on Upward Continuation to Evaluate Vertical Derivatives of Potential Field Data by Oliveira, Saulo Pomponet, Pham, Luan Thanh

“…Field derivatives are essential tools for interpretation of gravity and magnetic data. Several qualitative methods employ high-order derivatives or combine…”
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Regularization of vertical derivatives of potential field data using Morozov's discrepancy principle by Oliveira, Saulo Pomponet, Pham, Luan Thanh, Pašteka, Roman

“…The calculation of the vertical derivatives of potential field methods can be carried out in a stable manner by Tikhonov regularization, but this procedure…”
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Error analysis of the spectral element method with Gauss–Lobatto–Legendre points for the acoustic wave equation in heterogeneous media by Oliveira, Saulo Pomponet, Leite, Stela Angelozi

“…We present the error analysis of a high-order method for the two-dimensional acoustic wave equation in the particular case of constant compressibility and…”
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A log –barrier approach for airborne gamma-ray spectrometry inversion by Weihermann, Jessica Derkacz, Oliveira, Saulo Pomponet, Li, Yaoguo, Fonseca Ferreira, Francisco José, Silva, Adalene Moreira, Fortin, Richard

“…The standard processing of airborne gamma-ray spectrometry (AGRS) data provides useful preliminary information to interpretation in several contexts, such as…”
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Aeromagnetic and structural characterization of dyke swarms in southeast Brazil: Evidence for Cenozoic reactivation of the Guapiara lineament, Ponta Grossa Arch by Santos, Jéssica Miranda dos, Salamuni, Eduardo, Morales, Norberto, de Castro, Luís Gustavo, Lima da Silva, Clauzionor, de Souza, Iata Anderson, Gimenez, Viviane Barbosa, Oliveira, Saulo Pomponet

“…The Guapiara Lineament located on the northern edge of the Ponta Grossa Arch, Southeastern São Paulo state, Brazil, it is an important morphostructural feature…”
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Two‐dimensional inversion of airborne radiometric data for source concentrations: Application to Cu–Au targeting at Mara Rosa Magmatic Arc, Brazil by Weihermann, Jessica Derkacz, Oliveira, Saulo Pomponet, Li, Yaoguo, Silva, Adalene Moreira, Ferreira, Francisco José Fonseca

“…Airborne radiometrics (radiometric surveying) has been used in many applications, such as geological mapping, environmental studies, mineral exploration and…”
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An effective edge detection technique for subsurface structural mapping from potential field data by Pham, Luan Thanh, Van Duong, Hao, Kieu Duy, Thong, Oliveira, Saulo Pomponet, Lai, Giau Manh, Bui, Thanh Minh, Oksum, Erdinc

“…Improving the horizontal boundaries of subsurface geological structures is one of the main objectives in interpreting potential fields. To solve this problem,…”
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Dominant wavelength: a tool for morphological simplification of stylolites by Ferreira, André Davi, Pinto-Coelho, Cristina Valle, Oliveira, Saulo Pomponet, de Assis, Jeasy Parreira, Camargo, Murilo Henrique Taques, Cavallari, Marcella Luiza

“…Stylolites are intergranular dissolution structures commonly found in carbonate petroleum reservoirs and have a complex geometry characterized by multiple…”
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Magnetic interpretation of the Paranaguá Terrane, southern Brazil by signum transform by Weihermann, Jessica Derkacz, Ferreira, Francisco José Fonseca, Oliveira, Saulo Pomponet, Cury, Leonardo Fadel, de Souza, Jeferson

“…Magnetic maps reflect the spatial distribution of magnetic sources, which may be located at different depths and have significantly different physical and…”
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Hyperspectral analysis (VNIR-SWIR) applied to the characterization of a dolomitization context: a case study in Rio Bonito Quarry, Brazil by Camargo, Murilo Henrique Taques, Ferreira, André Davi, Pinto-Coelho, Cristina Valle, Oliveira, Saulo Pomponet, Guimarães, Tainá Thomassim, Cavallari, Marcella Luiza, Veronez, Maurício Roberto, de Filippis Alfaro, Lorena

“…Hyperspectral analysis is of great potential use in the characterization of carbonate rocks, in special to the petroleum industry as they occur as reservoirs…”
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Discontinuous enrichment methods for computational fluid dynamics by Oliveira, Saulo Pomponet

“…This dissertation develops and analyzes discontinuous enrichment methods (DEM) for the advection equation, the advection-diffusion equation and the Stokes…”
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Discontinuous enrichment methods for computational fluid dynamics by Oliveira, Saulo Pomponet

“…This dissertation develops and analyzes discontinuous enrichment methods (DEM) for the advection equation, the advection-diffusion equation and the Stokes…”
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