Neotectonics of Araripe basin near Patos shear zone and Araripe valley: Insights from geomorphometry

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2025-02-01 DOI:10.1016/j.jsames.2024.105333

Viktor Ferreira de Oliveira, Wellington Ferreira da Silva Filho

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Abstract

This study examines the tectonic activity in the northern segment of the Araripe Basin, located in southern Ceará state, NE Brazil, near the Patos shear zone, using morphometric indexes derived from SRTM imagery. The research integrates various morphometric parameters, including the Stream Length Gradient (SL), Asymmetry Factor (AF), Mountain-front Sinuosity (SMF), and Hypsometric Integral (HI), to develop a Composite Index of Tectonic Activity (CIT), which is further refined into the Relative Tectonic Activity Index (IAT), which indicates the degree of influence of tectonic activity on a given area. This approach facilitates a comprehensive assessment of tectonic processes and landscape evolution. The findings indicate that 26.75% of the studied region demonstrates a high IAT value, while 3.34% is categorized as very high. The majority of the area, encompassing 59.93%, shows medium tectonic activity. Through a combined analysis of these indexes and morphological assessments, which highlight the impact of horsts and grabens on the terrain, the study identifies areas most influenced by tectonic activity in shaping the landscape.

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来源期刊

Journal of South American Earth Sciences 地学-地球科学综合

CiteScore

3.70

自引率

22.20%

发文量

364

审稿时长

6-12 weeks

期刊介绍： Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.