Estruturação do grupo Serra Grande região de Santana do Acaraú- CE e a reativação do lineamento Sobral Pedro II, integração com dados geofísicos

The study area is located in the NW portion of the Ceará state nearby the city of Santana do Acaraú. Geologically it lies along the Sobral-Pedro II lineament which limits the domains of Ceará Central and Noroeste do Ceará, both belonging to the Borborema Province.The object of study was a NE trending 30km long siliciclastic body (sandstone and conglomerate) bounded by transcurrent dextral faults. The sediments are correlated to the Ipú Formation (Serra Grande Group) from the Parnaiba basin, which age is thought to be Siluro-Devonian. Existing structural data shown that bedding has higher but variable dips (70-45) near the borders faults and much lower to subhorizontal inward the body. The brittle deformation was related to a reactivation, in lower crustal level, of the Sobral-Pedro II lineament (Destro (1987, 1999; Galvão, 2002).The study presented here was focused in applying geophysicals methods (gravimetry and seismic) to determine the geometry of the sandstone/conglomeratic body and together with the structural data, to propose a model to explain its deformation. The residual anomalies maps indicate the presence of two main graben-like structures. The sedimentary pile width was estimated from 2D gravimetric models to be about 500-600 meters. The 3D gravimetric model stressed the two maximum width regions where a good correlation is observed between the isopach geometry and the centripetal strike/dip pattern displayed by the sediments bedding. Two main directions (N-S and E-W) of block moving are interpreted from the distribution pattern of the maximum width regions of the sedimentary rock

O espaço central das atenções: o corredor de integração da região metropolitana de Natal

This work considers the space study of the main road runner of integration of the Region Metropolitan of Natal (RMN) in formation, emphasizing its repercussion for the geographic context of the city, where we identify the positive and negative aspects of such space configuration, as for the aspects of the urban inaquality, economic centrality and of flows, promoted for the state and private capital (national and foreign). The linear convergence and polinucleately of geographic objects in that we identify as Central Space of Attentions (CSA), promoted, and still it promotes, important repercussion in the space estructuretion of the peripheral areas of the RMN, such as in the constitution of the "Capital Value of the Space". In this direction, to endorse the analysis of such reading, choose as cientific ballast the geographic theory, in a perspective dialectic, as well as we rescue contributions of the science of the administration, sociology, economy, amongst others. From the empirical research, subsidized with the application of forms together the entrepreneurs whom they possess investments in the CSA, as well as in the rescue of information you register in cadastre in the Junta Comercial do Estado do Rio Grande do Norte (JUNCERN) and telephonic list, we construct a proposal of reading of the current period of training of the process of space production to which is rank the CSA. The analysis of the data, under a comparative space angle, presents an important contribution to reevaluate the urban space of the RMN in its bigger aspect, exceeding the limits of the studied road corridor