http://repositorio.ufc.br/handle/riufc/320 2026-04-06T00:00:33Z http://repositorio.ufc.br/handle/riufc/83613 Título: Avaliação de sítios geológicos com interesse turístico no estado do Ceará: proposta metodológica e de valorização Autor(es): Gomes, Iris Pereira Abstract: One of the most recent topics in the context of geoconservation is geotourism, which has been gaining ground within scientific research. In the state of Ceará, whose rich geodiversity is responsible for the formation of numerous geological attractions of great scenic beauty, geotourism remains a relatively unexplored field. This study proposes an evaluation method and suggests enhancement strategies with the aim of promoting the geotouristic use of geological sites in Ceará. Initially, a systematic study of evaluation criteria for the tourist value of geological sites was carried out in order to compare quantification methodologies used worldwide. A literature review resulted in 114 selected articles and identified 13 different methods. This highlights the absence of a single effective method for evaluating geological sites of geotouristic interest, making it necessary to complement or adapt existing methods. Subsequently, 79 strategic sites were inventoried, distributed along the coast, in the mountain ranges, and in the hinterlands of Ceará. After this stage, a new method of quantitative evaluation of tourist value was developed, in which all inventoried sites were assessed using this proposed method in order to test its effectiveness by obtaining information on the relevance of these places. The resulting rankings allowed for the selection of priority sites for protection, for which geoconservation actions for geotourism in Ceará were suggested. In order to promote the enhancement of these locations, the study concludes with marketing proposals, including the development of a portfolio featuring seven geotouristic routes, a geotouristic map of Ceará, a set of postcards to promote the Geopark Sertão Monumental project, and suggestions for valuing regional handicrafts as potential geo-products. In light of the foregoing, the thesis paves the way for disseminating the importance of geoconserving the abiotic elements of the landscape in various geological environments of Ceará, contributing to knowledge of these environments and to strategies in public policy. This work can serve as a guide to promote geotourism — a sustainable form of tourism. Tipo: Tese 2025-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/83476 Título: Evolução sedimentar holocênica da planície costeira de Icapuí, Nordeste do Brasil Autor(es): Silva Neto, Cláudio Ângelo da Abstract: This thesis reconstructs the genesis and evolution of the Icapuí Coastal Plain (CE), a Holocene strandplain developed in a semi-arid environment, whose existence challenges the classic model of coastal barriers sustained by significant fluvial input. It proposes that its formation results from the interaction between Holocene regression, a persistent east-to-west longshore drift current, multiple sedimentary sources (cliffs, aeolian deflation, shallow platform), and strong compartmentalization of the accommodation space conditioned by the neotectonic legacy of the Potiguar Basin. The approach integrated photointerpretation of historical aerial photographs (1950- 1980), airborne LiDAR digital terrain models (0.5 m), optically stimulated luminescence (OSL) dating, granulometric and heavy mineral analyses, spatial statistics, remote sensing, and multivariate analysis. The LOE ages (4.53 ± 0.45 kyr to 0.35 ± 0.06 kyr BP) demonstrate that the entire emerged plain is Holocene, refuting previous interpretations of shallow Pleistocene terraces and allowing the establishment of a diachronic evolutionary model divided into five stages. In Stage A (≈ 4.5-1.9 kyr BP), the first set of coastal ridges is formed, preserved only as a dissected tabular paleosurface. A depositional hiatus of ~2.6 ka indicates coastal retrogradation associated with regional aridification and reduced sediment supply. In Stage B (≈ 1.9- 1.2 kyr BP), the resumption of supply and the influence of structural anomalies favor the formation of backbarrier lagoons and the construction of ridges on both flanks of the area. Stage C (≈ 1.2–0.35 kyr BP) is marked by intense sedimentary trapping capacity, continuous progradation, and the development of east-to-west oriented spits and spurs, suggesting inlet migration and reorganization of the lagoon-sea connection. In Stage D (≈ 0.35-0.075 kyr BP), morphological evidence and ages indicate the closure of an old estuary, the establishment of a new external barrier, and the subsequent opening of the current inlet. In Stage E (≈ 75 years BP-present), the welding of barrier islands and internal silting configure the youngest morphology, marked by the interaction between inner and outer tidal flats. Grain size analysis (108 samples) reveals systematic fineness and predominant negative asymmetry, consistent with Case B of McLaren and Bowles, indicating selective and persistent transport by drift. The heavy mineral assemblage (41 samples) documents significant enrichment in hornblende and dilution of ultrastable minerals (RTZ), reflecting hydrodynamic filtration and selection by mineralogical equivalence, not a change in provenance. The Depositional Efficiency Index, developed from Pearson's three moments, operationalizes the principles of GSTA for diachronic surfaces, allowing the mapping of granulometric coherence with transport processes. The coincidence between progradation maxima and structural highs reinforces that neotectonic heritage controls sedimentary anchoring zones and modulates the progradational potential of the strandplain. This demonstrates that voluminous strandplains can develop on semi- arid margins without significant fluvial input, provided there are continuous sedimentary sources, efficient drift, and structural control capable of creating accommodation hotspots. Tipo: Tese 2025-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/83120 Título: Geodiversidade e comunidades bentônicas da plataforma continental leste do Ceará: indicadores e linha de base ambiental para a sustentabilidade da economia azul Autor(es): Nemzoue, Peguy Noel Nkouamen Abstract: The Eastern Continental Shelf of Ceará (PCLC) has enormous potential for offshore wind energy generation. In addition, it has bioclastic sediments that have been of interest to several industrial sectors due to the high concentration of carbonate minerals. Despite previous knowledge about the sedimentary facies of this region, it lacks information about its benthic assemblage, which is a significant scientific gap, especially when related to environmental indicators and ecological characteristics. Thus, this study aimed to map the biotic components, focusing on benthic foraminifera, of the surface sediments of the PCLC and correlate them with marine geodiversity in order to characterize the ecology of this environment and produce a new and essential baseline for environmental monitoring studies. For such purposes, data from remote sensing, bathymetry and sediment samples were used. Sedimentological analysis identified bryozoans (35.5%), calcareous algae (27%), foraminifera (12.3%), molluscs (12%), cnidarians (4%), echinoderms (3.9%), porifera (3.5%) and arthropods (1.7%) as the main biotic components. Principal component analyses revealed positive correlations between calcareous algae, porifera and cnidarians with depths of 20 - 40 m, zones of transverse dunes and reef constructions, and the bioclastic sand facies. Arthropods were associated with depths of 40-60 m and the biolithoclastic sand facies, while echinoderms and molluscs predominate in shallower regions (0 - 20 m), associated with suspended sediment zones and the bioclastic gravel and bioclastic sand with gravel facies. Regarding benthic foraminifera, 14 epifaunal and 6 infaunal genera were identified. Most samples showed moderate diversity and there was an absence of extremely dominant species. The Shannon-Wiener diversity, Uniformity and Dominance indices suggest that the water condition in the PCLC is favourable for foraminiferal habitat. This work proves the relationship between geodiversity and biotic components of the study area, showing that abiotic factors influence the distribution of the biocenosis. The balanced distribution of foraminifera reflects a stable benthic community, typical of well-oxygenated and oligotrophic environments. This knowledge is particularly important to assess possible environmental changes and support management strategies, subsidizing the sustainable development of the PCLC within the scope of the Blue Economy. Tipo: Tese 2024-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/79823 Título: Neotectônica da bacia do araripe próximo a zona de cisalhamento patos e no vale do araripe: insights a partir da geomorfometria Autor(es): Oliveira, Viktor Ferreira de 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 moderate tectonic activity. Through a combined analysis of these indexes and morphological analyses, which highlight the impact of horsts and grabens on the terrain, the study identifies areas most influenced by tectonic activity in shaping the landscape Tipo: Tese 2024-01-01T00:00:00Z