Pre-to-syn-rift tholeiitic magmatism in a transtensive hyperextended continental margin: Onshore and offshore magmatism of the Campos Basin, SE Brazil

Tracking the Transition From a Gondwana LIP to the South Atlantic Ocean With Geochronological and Geochemical Indicators

“…(2003), and J. Almeida et al. (2021) results are shown as dashed lines. South Atlantic mid‐ocean ridge basalt (MORB) and E‐MORB compositions are also illustrated (Gale et al., 2013).…”

“…(2003) and J. Almeida et al. (2021). (h–k) Minor and trace element normalized by La versus La (ppm) plotted with Low‐Ti Paraná‐Etendeka basalts and South Atlantic mid‐ocean ridge basalt and E‐MORB compositions.…”

Tectono‐stratigraphic evolution of the rift and post‐rift systems in the Northern Campos Basin, offshore Brazil

“…Two sets of fractures and dyke swarms striking NW to NNW transverse to the basement metamorphic grain in the onshore basement have their offshore projections close to the study area (Almeida et al, 2021): the NNW-SSE Vitória-Colatina lineament (Chang et al, 1992) and the Piúma/Itaoca (Castelo) lineaments (Lourenço et al, 2016;Santiago et al, 2020) (Figure 1). In common, these structures demonstrate a polyphase evolution, with alkaline dykes being emplaced during the Cambrian, and tholeiitic dykes in the Early Cretaceous age (see age compilation in Pessano et al, 2021).…”

“…The geology of the onshore basement is represented as a simplified geological map (modified from Trouw et al, 2013 andMartins et al, 2021), which also shows the Early Cretaceous dyke swarms (i.e., 1-Vitória-Colatina lineament, 2-Castelo and 3-Serra Do Mar, c.f. Almeida et al, 2021). CFTD, Cabo Frio tectonic domain (c.f.…”

“…Similarly, a WNW-ESE trend worked as a kinematic buffer during RP1, which can be correlated with the Castelo Lineament (c.f. Almeida et al, 2021) (Figure 10). Detailed 3D seismic mapping of the pre-salt sequence (this work) and of the basement (Strugale et al, 2021) did not recognize any discrete NW-SE structure.…”