https://ri.ufs.br/jspui/handle/riufs/955 Mon, 10 Aug 2026 14:20:11 GMT 2026-08-10T14:20:11Z https://ri.ufs.br/jspui/handle/riufs/25735 Título: Petrologia do Granito Chasqueiro, região de Arroio Grande, sudeste do Escudo Sul-Rio-Grandense Autor(es): Vieira, Daniel Triboli; Koester, Edinei; Bertotti, Anelise Losangela Abstract: Chasqueiro Granite comprises an 400 km2 N50ºEtrend elongated body located at the southernmost portion of the eastern Sul-Rio-Grandense Shield. It consists of monzo to syenogranite, light gray and leucocratic porphyritic texture with megacrystals K-feldspar in a coarse equigranular hypidiomorphic matrix, composed of quartz, K-feldspar, plagioclase, biotite, hornblende, opaque minerals and accessories. The modal megacrystals reach proportions between 30.0 and 60.0%, and range from 4 to 8 cm, with mafic minerals of the matrix showing a subvertical magmatic foliation and a tectonic foliation prominent in the borders marked by intense ductile deformation and protomylonite generation. Another important aspect of the Granite Chasqueiro is the obiquitous presence of microgranular mafic enclaves of dioritic composition in the granite, having different shapes and sizes. The Chasqueiro Granite is high-K calc alkaline, metaluminous to slightly peraluminous and characterized by a narrow SiO2 variation, with characteristic signature of granites generated in post-collisional tectonic setting. Geochronological analyzes obtained by the U-Pb method (LA-ICP-MS) and isotope geochemistry of Lu-Hf zircon data (LA-ICP-MS) presenting, respectively, crystallization age 574 ± 3 Ma and negative εHf, which suggest a granite relationship with deformational event D2 and supporting a magmatic crustal sources with subordinate mantle component. Tue, 01 Mar 2016 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/25735 2016-03-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/25118 Título: Predicting frequency distribution and influence of sociodemographic and behavioral risk factors of Schistosoma mansoni infection and analysis of co-infection with intestinal parasites Autor(es): Rollemberg, Carla Virginia Vieira; Silva, Marilia Matos Bezerra Lemos; Rollemberg, Karla C.; Amorim, Fábio Jorge Ramalho de; Lessa, Nayanna Mendes Neves; Santos, Marcos D. S.; Souza, Acacia Maria Barros; Melo, Enaldo Vieira de; Almeida, Roque Pacheco de; Silva, Angela Maria da; Werneck, Guilherme Loureiro; Santos, Mario Adriano dos; Almeida, José Antonio Pacheco de; Jesus, Amélia Maria Ribeiro de Thu, 01 Jan 2015 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/25118 2015-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24398 Título: Mechanical properties of epoxy resin based on granite stone powder from the Sergipe fold-and-thrust belt composites Autor(es): Gonçalves, Jorge Antônio Vieira; Campos, Diego Adalberto Teles; Oliveira, Gislane de Jesus; Rosa, Maria de Lourdes da Silva; Macêdo, Marcelo Andrade Wed, 01 Jan 2014 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24398 2014-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/23388 Título: Caracterização geoquímica e estrutural do Granodiorito Cruzeiro do Sul: magmatismo shoshonítico pós-colisional neoproterozoico em zona de transcorrência, região de Quitéria, RS Autor(es): Knijnik, Daniel; Bitencourt, Maria de Fátima; Nardi, Lauro V. S.; Pinto, Viter Magalhães; Fontana, Eduardo Abstract: The Cruzeiro do Sul Granodiorite is located in the Eastern portion of the Sul-rio-grandense shield. It forms one ENE-WSW elongate body of approximately 4 km² within a sinistral strike slip shear zone. The rocks were originally considered as part of the Arroio dos Ratos Complex, but they were recently mapped as a separate unit because igneous textures are widely preserved and they are intrusive in the gneissis complex rocks. The Cruzeiro do Sul Granodiorite is thus a porphyritic horblende-biotite granodiorite in a mafic-rich (M’ ~ 20), medium-grained matrix. The magmatic foliation is marked by the shape alignment of feldspar megacrystals and mafic min-erals. A solid-state, mylonitic structure is well-developed mainly near the contacts. Leucocratic veins are found both concordant and discordant to the main foliation, and they may give rise to a composite banding within high-strain zones, together with elongate mafic microgranular enclaves and synplutonic dykes of tonalitic to dioritic composition. The mylonitic foliation trends EW to ENE-WSW with medium to steep dip, and contains a shallow plunging stretching lineation, which indicates a transcurrent kinematic for this shear zone. Structural evidences, such as the parallelism and progressive evolution of mylonitic foliation relative to the magmatic one, as well as the elongated form of granodioritic bodies and the concordant character of planar structures with the ENE shear zone, are inter-preted as an indication of syntectonic emplacement. Moreover, the absence of metamorphic foliation reworked by mylonitic shows that the Cruzeiro do Sul Granodiorite registers only one phase of deformation, which would have occurred during their emplacement. Thus, we have concluded that the Cruzeiro do Sul Granodiorite has no relation with the EW transversal event, and low dip angle responsible for the deformation of Arroio dos Ratos Complex, but is linked to the transcurrent event of Dorsal de Canguçu Shear Zone. The struc-tural and compositional features of Cruzeiro do Sul Granodiorite magmatism are consistent with its post-collisional character, and the shoshonitic affinity is given by its high Sr contents, regular rare earth element chondrite-normalized patterns and the abundance of light rare earth regarding the heavy rare earth elements. Patterns of trace elements with enrichment in Ba and Rb, and impoverishment of High-Field Strength in relation to Large Ion Lithophile Elements is also an important feature of the rocks of shoshonitic affinity. Their medium- to high-K content, and metaluminous to slightly peraluminous characters are possibly indicative of some crustal contamina-tion during their differentiation. The conditions of P and T, calculated with the geobarometer Alt-Hb and Plg-Hb thermobarometer were estimated at about 4.3 to 5.3 kbars and crystallization temperatures on the order of 720 to 760°C. The feldspar microstructures suggest deformation temperatures consistent with the amphibolite facies. Sun, 01 Apr 2012 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/23388 2012-04-01T00:00:00Z