The Neoproterozoic basement of the Parnaíba Basin (NE Brazil) from combined geophysical-geological analysis: A missing piece of the western Gondwana puzzle

Porto, Amanda; Carvalho, Ciro José Sousa de; Lima, C.; Heilbron, Monica; Caxito, Fabrício de Andrade; Terra, Emanuele F. La; Fontes, Sergio L.

doi:10.1016/j.precamres.2022.106784

Cited by 6 publications

(11 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This intercontinental feature is represented by transcurrent faults, and is well characterized in potential field and seismic geophysical data. The TbZ completely crosses the eastern part of the Parnaíba Basin (Figure 2), which promotes a series of structures in the sedimentary rocks that are amenable to study (Daly et al 2014;De Castro et al 2014;Santos et al 2018;Soares et al 2018;Porto et al 2022).…”

Section: Main Tectonic Blocks Of the Parnaíba Basinmentioning

confidence: 99%

“…De Castro et al (2014) interpreted two phases of rifting in the formation of the basin, however this proposition was modified from the availability of new deep reflection and refraction seismic, seismological and magnetotelluric data (Daly et al 2014;Tozer et al 2017;Soares et al 2018;Rocha et al 2019;Schiffer et al 2021). Porto et al (2022) proposed the occurrence of a new tectonic configuration for the Parnaíba Basin framework. They also revealed that the collisional tectonic scenario of the basement in the basin region contradicts the idea of a stable cratonic block, and presented new formation models that explain the heterogeneities observed in the crust and lithosphere.…”

Section: Main Tectonic Blocks Of the Parnaíba Basinmentioning

confidence: 99%

“…Over the last few years, several works have used different methods to try to better understand the configuration of the tectonic framework of the Parnaíba Basin (Brito Neves et al 1984;Cunha 1986;Góes et al 1990;Cordani et al 2009;Daly et al 2018;De Castro et al 2014;Tozer et al 2017;Soares et al 2018;Porto et al 2022). This understanding is extremely importance in view of the potential for energy mineral resources that the basin offers.…”

Section: Introductionmentioning

confidence: 99%

“…The formation of intracratonic basins, as is the case of the Parnaíba Basin, is a reflection of a series of geodynamic processes initiated at the end of the Neoproterozoic. The construction of Occidental Gondwana (Figure 1) involved the closure of oceanic basins, the joining of cratonic cores and the attachment of accretionary complexes along mobile belts (Dalziel 1997;Cordani et al 2013;Brito Neves and Fuck 2014;Caxito et al 2021;Porto et al 2022). Porto et al (2022) carried out an extensive compilation of geophysical and geological data in order to determine the configuration of the tectonic framework of the Parnaíba Basin and adjacent regions.…”

Section: Introductionmentioning

confidence: 99%

“…The construction of Occidental Gondwana (Figure 1) involved the closure of oceanic basins, the joining of cratonic cores and the attachment of accretionary complexes along mobile belts (Dalziel 1997;Cordani et al 2013;Brito Neves and Fuck 2014;Caxito et al 2021;Porto et al 2022). Porto et al (2022) carried out an extensive compilation of geophysical and geological data in order to determine the configuration of the tectonic framework of the Parnaíba Basin and adjacent regions. According to these authors, according to the interpretation of the geodynamic evolution along the western portion of Gondwana proposed by Caxito et al (2021), the Parnaíba Basin is embedded between the Amazonian-West African and Central African crustal megablocks (AWB and CAB, Figure 1).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Geophysical and geological framework of the southern edge of the Parnaíba Basin, NE Brazil

Pedrosa Jr.,

Mota,

Sá Freitas

2023

JGSB

View full text Add to dashboard Cite

The application of geophysical techniques to highlight and characterize magnetic and gravity anomalies was carried out along a research area at the southern edge of the Parnaíba Basin. This study was conducted through qualitative and quantitative interpretations of magnetic and gravity data, supported by surface geological information, reflection seismic data, stratigraphic well data, field data, and magnetic susceptibility and density measurements of rock samples collected in outcrops. The study used the 3D magnetization vector inversion method, and 4 regional transects were performed for 2.5D modeling of magnetic and gravity data. The investigation revealed the configuration of the structural framework of the southern edge of the Parnaíba Basin. The characterization of magnetic anomalies allowed the definition of four main domains. Three magnetic zones were fragmented by depth, in the intervals of 20 km to 30 km, 5 km to 8 km and 0.5 km to 1 km, which demonstrate the association of magnetic anomalies with shallow and deep crustal structures. The magnetic susceptibility data show good correlation with the main structural discontinuities, and in particular with the Transbrasilian Zone. The results show that the maximum thickness of the sedimentary cover in the basin is approximately 2 km. No features associated with grabens or rifts were identified along the transects, and the presence of gravity and pseudo-gravity lows are closely related to less dense lithological units of the upper crust, such as granitic masses and supracrustal sequences. The reactivations of the Transbrasilian Zone during the Mesozoic generated deep structures in the crust that promoted the rise of basaltic rocks and the intrusion of kimberlitic bodies.

show abstract