The interplay between basement fabric, rifting, syn‐rift folding, and inversion in the Rio do Peixe Basin, NE Brazil

Abstract

The Rio do Peixe Basin is part of a series of aborted Cretaceous rifts formed within the Proterozoic Borborema Province, onshore NE Brazil in response to rifting between Africa and South America. The basin is remarkably well-imaged and comprises fault-bounded depocentres, the main ones being the NE-oriented Brejo das Freiras and the E-W-oriented Sousa half-grabens. These grabens and their bounding faults are influenced by Neoproterozoic basement shear zones EAGE PICHEL et al.

Rift segmentation caused by reactivation of multiple basement structure systems: Evidence from the Hailar‐Tamtsag Rift, northeast Asia

“…We have outlined a range of geometric relationships between basement structures and rift‐related faults above (Figures 2–8). Whilst many of these interactions have been identified in previous studies (Fazlikhani et al., 2017; Morley, 2014; Phillips et al., 2016, 2019; Phillips & McCaffrey, 2019; Pichel et al., 2023; Wu et al., 2020; Ye et al., 2020), a key finding in our study is the recognition of additional geometrical interactions (Figures 3f and 6). Here we summarize our observations as three types including five styles (Figure 10).…”

“…Whilst this has long been recognized, over the last decade, the quality and resolution of seismic data, especially 3D seismic data, have been significantly improved, which has enabled identification of basement structures within both pre-rift strata and crystalline basement (Collanega et al, 2019;Guan et al, 2023;Osagiede et al, 2020;Phillips et al, 2016;Wu et al, 2020). The exact manner in which basement structures reactivate and the degree that basement structures exert their influence on rift geometry and fault evolution are now well documented (Bird et al, 2015;Cheng et al, 2023;Fazlikhani et al, 2017;Morley, 2014;Phillips et al, 2016Phillips & McCaffrey, 2019;Pichel et al, 2023;Samsu et al, 2023;Shaban et al, 2023;Strugale et al, 2021;Wang et al, 2022;Wu et al, 2020;Ye et al, 2020). However, few studies have considered how, or indeed if, variations in structural heterogeneity influence not only the presence but also the nature of rift segmentation through subsurface seismic data (Clemson et al, 1997;Zhong & Escalona, 2020).…”