Carlos Alberto Moreno Chaves

• Abstract

  As the Earth's interior behaves elastically, the propagation of seismic waves is determined by the elastic constants of the component material. Comparing the elastic properties of potentially relevant minerals with seismic observations allows us to relate these observations to geological processes and the thermal and chemical state of our planet. Thus, this research seeks to employ ab ini…

  Ab initio modeling of seismic velocities in aggregates and melts for the interpretation of a new seismic tomography model: towards new constraints on the upper-mantle thermochemical structure beneath South America, AV.EXT

• Abstract

  Integrating different geophysical datasets is essential to obtain improved models of the Earth's interior heterogeneities, as it helps to restrict the solution space of the properties investigated by each method. Although new models of physical properties in South America have been derived, they still lack resolution, making it difficult to clearly distinguish all geological features and …

  Sequential inversion of surface wave dispersion curves and geoid anomalies integrated to shear wave splitting analysis: new constraints on the velocity, attenuation, density, and anisotropy structures of the crust and upper mantle beneath South America, AP.R
• AGU Fall Meeting 2018, AR.EXT

• Abstract

  In this project, we focus on analyzing how the effect of the mantle heterogeneous velocity structure affects the travel time of P waves converted to S waves at the discontinuities of 410 km and 600 km, which mark the so-called mantle transition zone (MTZ). The MTZ is characterized by pressure-induced phase changes in the olivine, the most abundant mineral in the mantle, at its top and bot…

  Analysis of the mantle heterogeneous velocity structure effect on converted teleseismic waves used to image the transition zone., BP.MS

• Abstract

  Since the 1960s, seismic anisotropy has been used as a tool to study deformations in the upper mantle, since anisotropy is a direct consequence of the stress processes, which occur inside the Earth, although information about the occurrence and character of anisotropy also allows us to determine the asthenospheric flow induced by the movement of lithospheric plates. One of the clearest ma…

  Analysis of the upper mantle seismic anisotropy beneath Brazil from XKS splitting measurements, BP.IC

• Abstract

  In this project, we aim to obtain a new density model for the upper mantle beneath the Borborema Province from the inversion of residual geoid anomalies. The Borborema Province has positive geoid anomalies with an amplitude of approximately 10 meters, which are obtained after the removal of the long-wavelength components associated with sources in the lower mantle. To obtain geoid anomali…

  Inversion of geoid anomaly from the Borborema Province: new constraints on its thermal and compositional state from density models, BP.IC

(Only some records are available in English at this moment)