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Crustal and lithospheric mantle models under the Paraná and Chaco-Paraná basins by merging satellite gravity gradiometry, terrestrial gravimetry and geomagnetic and electromagnetic soundings


The goal of this study is to formulate enhanced geophysical models of the crust and upper mantle that can provide further insights on the origin and evolution of the Paraná and Chaco-Paraná basins, from the Cambrian to the Cenozoic, as well as to implement and test new geophysical algorithms for investigations of the lithosphere under intracratonic sedimentary basins. The present knowledge of the geologic basement under these basins is very poor because most of the lithosphere is attainable only by indirect geophysical investigations, above all if carried out by multiple methods. Through this work, it will be estimated new gravity gradient tensor data from ESA's GOCE (European Space Agency's Global Steady-State Ocean Circulation Explorer) satellite Mission, coalesced to models of the gravity and geoid field from terrestrial gravity data already acquired by several Brazilian institutes (IBGE, IAG-USP, UNESP, PETROBRAS), other satellites (e.g. GRACE - Gravity Recovery and Climate Experiment) and global geopotential models (e.g. EGM2008). The results from this phase will be used in the design of new gravimetric maps of the entire region of the Paraná and Chaco-Paraná basins, from the shallow parts (sedimentary basins) to the lower crust and upper mantle. New electromagnetic induction tensors will be calculated from geomagnetic depth soundings, deployed in a net with spacing of 50-80 km. These data will be expressed as 3D induction tensor models associated with the lithospheric geoelectrical pattern, and will be integrated to the gravity and geoid fields and other geophysical data presently available for the study of the Paraná basin. New electromagnetic induction data will be acquired by magneto telluric methods, in profiles and in arrays, deployed with greater station density mainly at the northwestern portion of the Paraná basin, taking into consideration the results obtained in the above described steps. These data will be used as parameters of geoelectric resistivity, phase and anisotropy, in 2D and 3D models of the basin and of the underlying lithosphere. Interpretative models of the basins will be proposed from qualitative comparisons of the results expressing the relationships between physical and lithological properties and the geophysical parameters obtained through the applied methods. (AU)

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Scientific publications (13)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CHAVES, CARLOS; USSAMI, NAOMI; RITSEMA, JEROEN. Density and P-wave velocity structure beneath the Parana Magmatic Province: Refertilization of an ancient lithospheric mantle. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, v. 17, n. 8, p. 3054-3074, . (13/11908-3, 09/50493-8, 09/18511-6)
BOLOGNA, M. S.; DRAGONE, G. N.; MUZIO, R.; PEEL, E.; NUNEZ-DEMARCO, P.; USSAMI, N.. Electrical Structure of the Lithosphere From Rio de la Plata Craton to Parana Basin: Amalgamation of Cratonic and Refertilized Lithospheres in SW Gondwanaland. TECTONICS, v. 38, n. 1, p. 77-94, . (09/54006-4, 09/50493-8, 12/06082-6)
PERUGINI, D.; DE CAMPOS, C. P.; PETRELLI, M.; MORGAVI, D.; VETERE, F. P.; DINGWELL, D. B.. Quantifying magma mixing with the Shannon entropy: Application to simulations and experiments. LITHOS, v. 236, p. 299-310, . (15/11850-0, 09/50493-8)
MARIANI, PATRIZIA; BRAITENBERG, CARLA; USSAMI, NAOMI. Explaining the thick crust in Parana basin, Brazil, with satellite GOCE gravity observations. Journal of South American Earth Sciences, v. 45, p. 209-223, . (09/50493-8)
SACEK, VICTOR; USSAMI, NAOMI. Upper mantle viscosity and dynamic subsidence of curved continental margins. NATURE COMMUNICATIONS, v. 4, . (09/50493-8, 11/10400-0)
BOLOGNA, MAURICIO S.; NUNES, HIGO O.; PADILHA, ANTONIO L.; VITORELLO, ICARO; PADUA, MARCELO B.. Anomalous electrical structure in the northwestern Parana Basin, Brazil, observed with broadband magnetotellurics. Journal of South American Earth Sciences, v. 42, p. 74-82, . (09/50493-8)
SACEK, V.; BRAUN, J.; VAN DER BEEK, P.. The influence of rifting on escarpment migration on high elevation passive continental margins. JOURNAL OF GEOPHYSICAL RESEARCH, v. 117, . (06/06881-5, 09/50493-8)
PERUGINI, DIEGO; DE CAMPOS, CRISTINA P.; PETRELLI, MAURIZIO; DINGWELL, DONALD B.. Concentration variance decay during magma mixing: a volcanic chronometer. SCIENTIFIC REPORTS, v. 5, . (15/11850-0, 09/50493-8)
DRAGONE, GABRIEL NEGRUCCI; USSAMI, NAOMI; GIMENEZ, MARIO ERNESTO; LINCE KLINGER, FEDERICO GUSTAVO; MORENO CHAVES, CARLOS ALBERTO. Western Parana suture/shear zone and the limits of Rio Apa, Rio Tebicuary and Rio de la Plata cratons from gravity data. Precambrian Research, v. 291, p. 162-177, . (09/18511-6, 09/50493-8, 12/06082-6)
PADILHA, ANTONIO L.; ALVES, LIVIA R.; SILVA, GRAZIELA B. D.; ESPINOSA, KAREN V.. Effect of a huge crustal conductivity anomaly on the H-component of geomagnetic variations recorded in central South America. EARTH PLANETS AND SPACE, v. 69, . (00/00806-5, 09/50493-8)
PADILHA, ANTONIO L.; VITORELLO, ICARO; ANTUNES, CASSIO E.; PADUA, MARCELO B.. Imaging three-dimensional crustal conductivity structures reflecting continental flood basalt effects hidden beneath thick intracratonic sedimentary basin. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, v. 120, n. 7, p. 4702-4719, . (09/50493-8, 09/13054-6)
BOLOGNA, M. S.; PADILHA, A. L.; PADUA, M. B.; VITORELLO, I.; CHAMALAUN, F. H.. Paraguay-Araguaia Belt Conductivity Anomaly: A fundamental tectonic boundary in South American Platform imaged by electromagnetic induction surveys. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, v. 15, n. 3, p. 509-515, . (00/00806-5, 09/50493-8)
MORENO CHAVES, CARLOS ALBERTO; USSAMI, NAOMI. Modeling 3-D density distribution in the mantle from inversion of geoid anomalies: Application to the Yellowstone Province. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, v. 118, n. 12, p. 6328-6351, . (08/02411-0, 09/50493-8, 09/18511-6)

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