Insights into tectonic reactivation and landscape development processes at the Paraná Basin border using integrated geomorphometric and radiometric analyses

Abstract

In the Bom Jardim de Goiás region, the Transbrasiliano Lineament shows evidence of a fault reactivation along NE-SW structures (main direction) and secondary directions related to subsequent events. To study the structural framework and reactivation inputs toward tectonic events, distinctive features of the northern Paraná Basin border were analyzed by integrating gamma spectrometry and radar data, both supported by field research. The remote sensing database obtained by the Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar (PALSAR) sensor allowed detecting lineaments and morphometric derivatives. Besides, the developed morphogenetic process images attest to the importance of structural control on relief evolution while concentrating lineaments as a function of lithological and geomorphological domains. Airborne gamma-ray spectrometry data processing focused on K d (Anomalous Potassium) and F-Parameter indices. In this context, the fuzzy logic and Index Overlay Method allowed multivalued integration that indicated hydrothermal products and weathering processes correlated with K d and F-Parameter anomalies. Thus, the joint interpretation of lineaments, geomorphological domains, and K d /F-Parameter anomalies allowed differentiating primary geological elements and products from surface dynamics, directly or indirectly related to tectonic reactivation processes.

Modification of Radiogenic Heat Production (RHP) Equation due to Radioactive Disequilibrium in Rock Samples from Gamma-Ray Spectrometry

“…The method can be applied to evaluate concentrations of radionuclide in many geothermal fields and excavation sites (Faruwa et al 2020;Cinelli et al 2020). It can also be used to decide the nature and uranium migration (UM) rate in many crustal formations (Youssef et al, 2017;Pereira and Ferreira, 2018;Reis et al 2020) (Yuan 2023), sedimentary surface identification for exploration of oil and gas, radioactive pollution discovery (Cinar et al 2017), mineral probing (Chandrasekaran et al 2014), pure earth science discoveries (Ray 2008;Sims 2021), facture and fissure unearthing linked with uranium concentrations elevation which is caused by uranium movement in fluid in the subsurface (Grozeva 2022) which can cause substantial problem for gamma-ray spectrometry investigation and explanation known as disequilibrium (Lefebvre 2022;Grozeva 2022;Cai 2015).…”