scholarly journals Major and trace elements redistribution in weathered claystones from the Corumbataí Formation, Paraná Sedimentary Basin, São Paulo, Brazil

2017 ◽  
Vol 47 (4) ◽  
pp. 615-632
Author(s):  
Letícia Hirata Godoy ◽  
Diego de Souza Sardinha ◽  
Maria Margarita Torres Moreno

ABSTRACT: We studied 30 samples from 10 mining fronts of clayish rocks of the Corumbataí Formation, in the region of the Santa Gertrudes Ceramic Pole (São Paulo, Brazil), in order to evaluate the variation of rare earth elements (REE), mineralogy, weathering effects and provenance. The profiles show diagnostic geochemical signatures that are uniform across the Corumbataí Formation samples in the studied region and can be correlated from mine to mine, i.e.: 1) the constant MgO/K2O ratio and the variation of other oxides, which allow the identification of three main groups of samples; 2) similar groups of chemical index of weathering (CIW) and chemical index of alteration (CIA); 3) the immobile character of REE, Th, and Sc. The erosion/denudation processes were apparently the same among the studied profiles, allowing the identification of a similar weathering pattern among the mines, despite its location within the stratigraphic column. Mineralogical and geochemical data here reported suggest a dominant felsic source, but intermediate or mixed sources cannot be discarded. The chemical and mineralogical aspects observed are practically uniform along the studied profiles and mines, which allow them to be used as raw material by the industries of the Santa Gertrudes Ceramic Pole (SGCP) region.

2014 ◽  
Vol 111 ◽  
pp. 33-46 ◽  
Author(s):  
Cassiano Antonio Bortolozo ◽  
Marco Antonio Couto ◽  
Jorge Luís Porsani ◽  
Emerson Rodrigo Almeida ◽  
Fernando Acácio Monteiro dos Santos

2012 ◽  
Vol 82 ◽  
pp. 75-83 ◽  
Author(s):  
Jorge Luís Porsani ◽  
Emerson Rodrigo Almeida ◽  
Cassiano Antonio Bortolozo ◽  
Fernando Acácio Monteiro dos Santos

Author(s):  
Fernando Casas

Fernando Casás: a note about the artist.www.fernandocasas.es  Fernando Casás [Vigo, Spain, 1946], lives between Brazil – where he spent most part of his life – and Spain, where he is professor of Sculpture at the University of Vigo. He is also professor in Doctorate courses at ESAD Escola Superior Artística do Porto, Portugal. He began working and investigating with Art and Nature [Land Art, Eco Art, Earth Works] at the end of the sixties, influenced by the tropical environment. Since then he works in different, paralell and recurrent streams: a de-materialized side [like the Idiotic Projects, the capture of a fleeting moment];  the ephemeral works [like the Wanderer Project  or the Earth 100 / Latex, where he makes small and intimate incursions at random in the natural environment] ;  and finally what we could call the formal works, where evidenciation of the passing of time and investigation of new ways are the major concerns, and where he works with different techniques, procedures and materials, ranging from worn out raw material to new technologies, which result in works that can be seen in exhibitions, collections or public places [The Termite Cycle, Trees as Archaeology or Act / Impact]. Nowadays he is considered by art critics as a pioneer in the Art and Nature field.  Among public works: Lamed Vav / The 36 Justs together with R.Morris, R.Long, Hamilton Finlay. Island of Sculptures, and Memory of the River, both in Pontevedra, Spain, 1999 and 2006.Two Stones two University Botanic Graden, Jerusalem, Israel. 2000.Amazonia / Roots. Catacumba Sculpture Park, Rio de Janeiro, Brasil. 1989.Wood. Burgo das Nacións Square, Santiago de Compostela, Spain. 1994.Big Snake. Seeff & Marks Community Center, Jerusalem, Israel. 1989.Threes as Archaeology together with R. Long, S.Armajani, U.Rükriem, D.Nash. Monegros Desert,  Huesca,  Spain. 2003.Ashé / The Curve of the 9 over Bayona sea, in the road that unites Galicia and Portugal. 2005.Apple trees for Carrazeda. Carrazeda de Ansiães, Portugal, 2009. Selected exhibitions:Solo Termites tunnels at Centro Cultural dos Correios. [Río de Janeiro, 2009]Intervention Blue in Tifariti  Sahara Desert, during the International Encounters of Art in the Free Territories of Sahara. [Argelia, 2009].Retrospective solo exhibition in the series Great Galician Artists [Caixanova, Vigo, 2006]Naturally Artificial. [Museo Esteban Vicente, Segovia, 2006]Archaeology of the non site. [Círculo de Bellas Artes, Madrid, 2004]A wood in works: Spanish vanguards in wood. [Museo de Arte Contemporáneo Esteban Vicente, Segovia y Sala de las Alhajas, Madrid, 2000]XXIª International Beinnial of São Paulo [Säo Paulo, Brasil, 1991]Brazilian work:  1964 – 1984 [Retrospectiva en la Fundación Luís Seoane, A Coruña, 2000]Fragments of America [Convento de San Francisco de la Habana Vieja, Cuba. 1999] Possible Dimension [Museu de Arte Moderna de Säo Paulo, Brasil, 1991]Manuscripten van de Amazon Rivier [EKWC Europees Keramisch Werkcentrum, den Bosch, The Netherlands, 1994]Amazonas, Série Negra [Galería Ibeu-Copacabana y Casa de Cultura Laura Alvim, Río de Janeiro; Galeria Aquarela y Espaço Unicamp, Säo Paulo, 1988 y 1989]Camouflaged Earth  [Municipal Gallery, Jerusalem, Israel y Centre Culturel Bresilien, Ginebra, Suiza, 1987]De Huid van de Witte Dame [Phillips Headquarters, Eindhoven, Holanda, 1996]Intervention for Ecology  [Museu de Arte Moderna do Rio de Janeiro, Brasil, 1984). El Proyecto Errante fue llevado a Suiza, Francia, Israel, Holanda, entre otros países.  Selection of books and catalogues:Wagensberg, Jorge;  A.Ruiz de Samaniego et.al.: Fernando Casás: Archaeology of the non site, Hércules de Eciciones and Círculo de Bellas Artes. Madrid, 2004.Parreño, José María;  Pignatari, Décio: Fernando Casás: Retrospective at Caixanova. Vigo, 2006.Duque, Félix; Katz, Renina: Brazilian Works. Fundaçäo Luís Seoane, La Coruña, 2000.Maderuelo, Javier: Natürgeist. Diputación de Huesca, 1997.Garraud, Colette; Boël, Mickey: L’Artiste Contemporain et la Nature. Parcs et paysages européens. Éditions Hazan, Paris, 2007.


Author(s):  
Fernando Casas

Fernando Casás: a note about the artist.www.fernandocasas.es  Fernando Casás [Vigo, Spain, 1946], lives between Brazil – where he spent most part of his life – and Spain, where he is professor of Sculpture at the University of Vigo. He is also professor in Doctorate courses at ESAD Escola Superior Artística do Porto, Portugal. He began working and investigating with Art and Nature [Land Art, Eco Art, Earth Works] at the end of the sixties, influenced by the tropical environment. Since then he works in different, paralell and recurrent streams: a de-materialized side [like the Idiotic Projects, the capture of a fleeting moment];  the ephemeral works [like the Wanderer Project  or the Earth 100 / Latex, where he makes small and intimate incursions at random in the natural environment] ;  and finally what we could call the formal works, where evidenciation of the passing of time and investigation of new ways are the major concerns, and where he works with different techniques, procedures and materials, ranging from worn out raw material to new technologies, which result in works that can be seen in exhibitions, collections or public places [The Termite Cycle, Trees as Archaeology or Act / Impact]. Nowadays he is considered by art critics as a pioneer in the Art and Nature field.  Among public works: Lamed Vav / The 36 Justs together with R.Morris, R.Long, Hamilton Finlay. Island of Sculptures, and Memory of the River, both in Pontevedra, Spain, 1999 and 2006.Two Stones two University Botanic Graden, Jerusalem, Israel. 2000.Amazonia / Roots. Catacumba Sculpture Park, Rio de Janeiro, Brasil. 1989.Wood. Burgo das Nacións Square, Santiago de Compostela, Spain. 1994.Big Snake. Seeff & Marks Community Center, Jerusalem, Israel. 1989.Threes as Archaeology together with R. Long, S.Armajani, U.Rükriem, D.Nash. Monegros Desert,  Huesca,  Spain. 2003.Ashé / The Curve of the 9 over Bayona sea, in the road that unites Galicia and Portugal. 2005.Apple trees for Carrazeda. Carrazeda de Ansiães, Portugal, 2009. Selected exhibitions:Solo Termites tunnels at Centro Cultural dos Correios. [Río de Janeiro, 2009]Intervention Blue in Tifariti  Sahara Desert, during the International Encounters of Art in the Free Territories of Sahara. [Argelia, 2009].Retrospective solo exhibition in the series Great Galician Artists [Caixanova, Vigo, 2006]Naturally Artificial. [Museo Esteban Vicente, Segovia, 2006]Archaeology of the non site. [Círculo de Bellas Artes, Madrid, 2004]A wood in works: Spanish vanguards in wood. [Museo de Arte Contemporáneo Esteban Vicente, Segovia y Sala de las Alhajas, Madrid, 2000]XXIª International Beinnial of São Paulo [Säo Paulo, Brasil, 1991]Brazilian work:  1964 – 1984 [Retrospectiva en la Fundación Luís Seoane, A Coruña, 2000]Fragments of America [Convento de San Francisco de la Habana Vieja, Cuba. 1999] Possible Dimension [Museu de Arte Moderna de Säo Paulo, Brasil, 1991]Manuscripten van de Amazon Rivier [EKWC Europees Keramisch Werkcentrum, den Bosch, The Netherlands, 1994]Amazonas, Série Negra [Galería Ibeu-Copacabana y Casa de Cultura Laura Alvim, Río de Janeiro; Galeria Aquarela y Espaço Unicamp, Säo Paulo, 1988 y 1989]Camouflaged Earth  [Municipal Gallery, Jerusalem, Israel y Centre Culturel Bresilien, Ginebra, Suiza, 1987]De Huid van de Witte Dame [Phillips Headquarters, Eindhoven, Holanda, 1996]Intervention for Ecology  [Museu de Arte Moderna do Rio de Janeiro, Brasil, 1984). El Proyecto Errante fue llevado a Suiza, Francia, Israel, Holanda, entre otros países.  Selection of books and catalogues:Wagensberg, Jorge;  A.Ruiz de Samaniego et.al.: Fernando Casás: Archaeology of the non site, Hércules de Eciciones and Círculo de Bellas Artes. Madrid, 2004.Parreño, José María;  Pignatari, Décio: Fernando Casás: Retrospective at Caixanova. Vigo, 2006.Duque, Félix; Katz, Renina: Brazilian Works. Fundaçäo Luís Seoane, La Coruña, 2000.Maderuelo, Javier: Natürgeist. Diputación de Huesca, 1997.Garraud, Colette; Boël, Mickey: L’Artiste Contemporain et la Nature. Parcs et paysages européens. Éditions Hazan, Paris, 2007


2005 ◽  
Vol 42 (3) ◽  
pp. 287-306 ◽  
Author(s):  
Qiugen Li ◽  
Shuwen Liu ◽  
Baofu Han ◽  
Jian Zhang ◽  
Zhuyin Chu

The eastern segment of the Central Tianshan Tectonic Zone in northwestern China includes the Proterozoic metasedimentary Xingxingxia complex. Because these rocks have been extensively deformed and metamorphosed to greenschist or amphibolite facies, a geochemical and Nd isotopic study was undertaken to constrain their provenance and tectonic setting, as well as to evaluate the effects of weathering and sedimentary processes on the source rock signature. Major- and trace-element data indicate that these samples are characterized by negative Eu anomalies, low chemical index of alteration values, and high index of compositional variability values. Chemical index of alteration values and the plot of molecular proportions Al2O3–(CaO* + Na2O)–K2O suggest low degrees of weathering of the source. They are compositionally immature and poorly sorted. Geochemical data and immobile elemental ratios, for example Al2O3/TiO2, Cr/Th, Eu/Eu* and (La/Yb)n, indicate that the clastic materials were derived predominantly from felsic sources. Sedimentary tectonic discrimination diagrams demonstrate that most of the samples of the Xingxingxia complex were deposited on an active continental margin or continental island-arc setting. Rare-earth element distributions, εNd(t) values (calculated at 1.20 Ga, varying from –3.00 to +6.1), TDM model ages (ranging from 1.30 to 2.30), and t – εNd(t) plot, indicate that sediments of the Proterozoic Xingxingxia complex were derived from varying degrees of mixing between Paleoproterozoic crust and juvenile materials with the former predominating. There is an increased flux of juvenile materials from Weiya in the east through Dikar to Kumishi. The secondary juvenile source may be 1.2 Ga arc-magma materials.


2016 ◽  
Vol 132-133 ◽  
pp. 232-242 ◽  
Author(s):  
Andrezza de Almeida Azzi ◽  
Marek Osacký ◽  
Peter Uhlík ◽  
Mária Čaplovičová ◽  
Antenor Zanardo ◽  
...  

2020 ◽  
Vol 35 (1) ◽  
pp. 38-45
Author(s):  
Ana Carolina Lopes Amaral Costa ◽  
Humberto de Jesus Eufrade Junior ◽  
Emanuel Rangel Spadim ◽  
José Mauro Santana Da Silva ◽  
Saulo Philipe Sebastião Guerra

CARACTERIZAÇÃO FÍSICA, QUÍMICA E MÊCANICA DE PELLETS DE BAGAÇO DE CANA-DE- AÇÚCAR   ANA CAROLINA LOPES AMARAL COSTA1, HUMBERTO DE JESUS EUFRADE JUNIOR2, EMANUEL RANGEL SPADIM3, JOSÉ MAURO SANTANA DA SILVA4, SAULO PHILIPE SEBASTIÃO GUERRA5   1 Departamento de Engenharia Rural e Socioeconomia, Faculdade de Ciências Agronômicas (FCA) – Universidade Estadual Paulista (UNESP), Avenida Universitária - 3780, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail:  [email protected] 2 Departamento de Engenharia Rural e Socioeconomia, Faculdade de Ciências Agronômicas (FCA) – Universidade Estadual Paulista (UNESP), Avenida Universitária - 3780, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail:  [email protected] 3 Departamento de Engenharia Rural e Socioeconomia, Faculdade de Ciências Agronômicas (FCA) – Universidade Estadual Paulista (UNESP), Avenida Universitária - 3780, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail:  [email protected] 4 Departamento de Ciências Ambientais. Universidade Federal de São Carlos (UFSCar), Rod. João Leme dos Santos, km 110, CEP: 18052.780.  Bairro Itinga, Sorocaba, São Paulo, Brasil. E-mail: [email protected] 5 Departamento de Engenharia Rural e Socioeconomia, Faculdade de Ciências Agronômicas (FCA) – Universidade Estadual Paulista (UNESP), Avenida Universitária - 3780, CEP: 18610-034, Botucatu, São Paulo, Brasil. E-mail:  [email protected]   RESUMO: A bioenergia é uma das alternativas para diminuir a dependência de combustíveis fósseis da matriz energética mundial. Os pellets surgem como uma opção interessante para a produção de biomassa e o bagaço de cana-de-açúcar, também, pode ser aproveitado na forma de pellets. Pellets é o nome dado ao produto resultante do processo de compressão aplicada a uma matéria prima, sendo que em muitos casos essa matéria prima é preparada previamente através do processo de secagem e moagem. O objetivo da pesquisa foi realizar a análise das propriedades: físicas - densidade, umidade, granulometria, diâmetro e comprimento, químicas – teor de carbono fixo, material volátil e cinzas, mecânicas -  durabilidade mecânica e o poder calorífico superior. Foram analisadas amostras de pellets provenientes de fazendas do Estado de São Paulo. As análises foram conduzidas no Laboratório Agroflorestal de Biomassa e Bioenergia (LABB/IPBEN) pertencente à Faculdade de Ciências Agronômicas (FCA/UNESP), sendo esta biomassa uma fonte alternativa de energia com alto teor energético e baixa umidade   Palavras-chave: poder calorífico superior, biomassa, fontes alternativas de energia.   PHYSICAL, CHEMICAL AND MECHANICAL CHARACTERIZATION OF SUGARCANE BAGASSE PELLETS   ABSTRACT: Bioenergy is one of the alternatives to reduce the dependence on fossil fuels in the world energy matrix. Pellets appear like an attractive option for the production of biomass, and sugarcane can be used in the form of pellets. Pellets are the name given to the product that affects the process of applying a raw material, and in many cases, this material is prepared for the drying and grinding process. The objective of the research was to carry out an analysis of the properties: physical - density, granulometry, diameter and length, chemical - fixed carbon content, volatile matter and ashes, mechanics - mechanical use, and higher heating value. Samples of pellets from farms in the State of São Paulo were analyzed. Analyzes were conducted at the Agroforestry Laboratory of Biomass and Bioenergy (LABB / IPBEN) belonging to the Faculty of Agronomic Sciences (FCA / UNESP), and this biomass showed to be an alternative source of energy with high energy content and low moisture.    Keywords:  higher heating value, biomass, alternative energy source.


2019 ◽  
Vol 6 (1) ◽  
pp. 1-25
Author(s):  
Fabio Grossi Santos ◽  
Pedro Michelutti Cheliz

The lithic site Boa Esperança II (BES II), in the São Paulo segment of the Brazilian Plateau, next to the boundary between the cities of Araraquara (SP) and Boa Esperança do Sul (SP), presents a collection of almost 2,000 lithic artifacts (predominantly chert and sandstone), being interpreted as a settlement of diversified functions with possibly continuous or successive occupation. In this work, we approach the site based on interface of its insertion in the regional physical-environmental context - with emphasis on the interface with relief frames, surface structure study and estimated geomorphic sequences of the alluvial plain of Jacaré-Guaçu river - and techno-typological analysis. It was verified that the BES II artifacts are distributed along vertical profiles and relief pictures lined by records that mark the transition from semi-arid conditions to others of increasing humidity, successive oscillations of base levels and modifications of fluvial regimes (ephemeral channels passing to perennial channels of different hydrological meandrings patterns), indicating that human occupation has dealt with conditions of quite distinct landscapes between the Late Pleistocene and the Holocene. Local lithic industry would have taken advantage of attributes derived from these modifications in the landscape over time - in particular the exposure of gravels of large river pebbles deposited by torrential ephemeral channels. The past  abundance of raw material of fluvial origin would have contributed to the location of the site in the regional geomorphological context, as well as for a lithic assemblage based on the production of large unipolar flakes. We observed in the correlations between the position of artifacts, geomorphical and pedological data, OSL and Carbone-14 dates at archaeological levels, elements that allow us to discuss considering BES II as an archaeological site to integrate the interval of the Pleistocene-Holocene transition and to had interfaces with the geomorphological and environmental changes of such time. The archaeological implications of the issue and the fact that only one dating of photoluminescence has been reported from the deepest level of the site (basal gravel layer) emphasize the need for new, denser and more diversified studies.


Author(s):  
Meriellen Nuvolari Pereira Mizutani ◽  
Juliana Rodrigues Maróstica ◽  
Carlos Alberto Nunes de Oliveira ◽  
Mario Chiarastelli Paulin ◽  
Rafael Alexandre Do Nascimento Purificação ◽  
...  

The growth of the population's demand for urbanization besides the globalization of the economy and technology, leads to the depletion of natural resources, requiring a new vision of business focused on sustainability. In this scenario, the Civil construction has been acting in a participatory way in designing and thinking, aiming to reduceimpacts to the environment. The Jardim das Perdizes neighborhood, located in the Barra Funda region of São Paulo, is the first to receive the AQUA certification of sustainable neighborhood, and has several constructive techniques and equipment bringing improvement and economics of the use of natural resources, with Predictedrates of reduction of 35% of water consumption and 25% of energy consumption, in addition to the high performance of buildings, spaces and equipment. Moreover, within the undertaking there is also a park donated to the public sector with complete infrastructure, integrating the leisure space with the interrelations of society andthe ways of thinking sustainability. It is possible to observe with the study that the actions of fostering sustainable constructions benefit the environment with the reduction of raw material consumption and non-renewable resources, to the population with more planned and better income spaces and to the market Real estate, valuingbuildings.


2018 ◽  
Vol 156 (07) ◽  
pp. 1157-1174 ◽  
Author(s):  
NAJMEH ETEMAD-SAEED ◽  
MAHDI NAJAFI

AbstractThe Soltanieh Formation in the Alborz Mountains of northern Iran is not only a key lithostratigraphic unit for reconstruction of the Iranian geological history, but also a globally outstanding succession to reveal variations in seawater composition across the Precambrian–Cambrian (PC–C) transition. Mineralogical and geochemical data from a continuous stratigraphic record of Lower and Upper Shale members of the Soltanieh Formation are used to define their provenance, tectonic setting as well as geochemical variations during the PC–C transition. The Soltanieh mudrocks are composed of quartz and plagioclase, with minor constituents of illite, chlorite and montmorillonite. The chemical index of alteration, A-CN-K (Al2O3 – CaO + Na2O – K2O) relations, index of compositional variability, and Th/Sc versus Zr/Sc ratios indicate low chemical weathering in source areas, compositionally immature and first-cycle sediments. Immobile trace-element ratios and discrimination diagrams, chondrite-normalized rare Earth element (REE) patterns and negative Eu anomaly, along with low total REE abundances and negligible Ce anomalies, demonstrate that the Soltanieh Formation was mainly derived from proximal felsic-intermediate Cadomian magmatic arc sources and deposited in a continental-arc-related basin on the proto-Tethyan active margin of Gondwana. The palaeoredox indicators exhibit a remarkable change in environmental condition from a suboxic to an oxic state across the PC–C transition from the Kahar Formation to the Upper Shale Member of the Soltanieh Formation. Moreover, a significant upwards increase of P, Ba, and Ca is likely associated with enhanced fluxes of nutrient elements during the PC–C transition, coeval with the building of collisional mountain belts during the amalgamation of Gondwana.


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