Granite Gneiss
Mostrando 1-12 de 15 artigos, teses e dissertações.
-
1. Microwave Acid Extraction to Analyze K and Mg Reserves in the Clay Fraction of Soils
ABSTRACT: Extraction of K and Mg with boiling 1 mol L-1 HNO3 in an open system for predicting K and Mg uptake by plants is a method of low reproducibility. The aim of this study was to compare the extraction capacity of different acid methods relative to hydrofluoric acid extraction for K and Mg. A further objective was to develop a chemical extraction metho
Rev. Bras. Ciênc. Solo. Publicado em: 15/12/2016
-
2. Influência de variáveis de compactação na estrutura dos solos: caracterizações geotécnica, química, mineralógica e microestrutural / Influence of laboratory compaction variables in soils structure: geotechnical, chemical, mineralogical and microstructural characterizations
This research addressed the effect of laboratory methods of static and dynamic compaction on compaction parameters, mechanical strength and compressibility of three gneiss residual soils (two young and one mature soils) and two granite residual soils (one young and one mature soils) from the Minas Gerais State, Brazil. Disturbed soils samples were collected,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2010
-
3. Características de campo, petrografia e litogeoquímica da Unidade Santo Aleixo em sua localidade-tipo / Field geology, petrography and lithogeochemistry of Santo Aleixo Unit in its type location
The Santo Aleixo Unit in its type-location is represented by homogenous gneiss and subordinated banded and inclused mafic-felsic-rich gneisses, all rocks separated by gradational contacts. Leucogranitic gneiss, migmatites, late-tectonic granite stocks and diabase dikes also occur in the studied area. The gneissic foliation dips to SE or NW with low to medium
Publicado em: 2008
-
4. AVALIAÇÃO DE PROPRIEDADES MECÂNICAS E HIDRÁULICAS DE UM PERFIL DE ALTERAÇÃO DE GRANITO-GNAISSE DE CURITIBA, PR / EVALUATION OF MECHANICAL AND HYDRAULIC PROPERTIES OF A GRANITE-GNAISS WEATHERING PROFILE FROM CURITIBA, PR
Um perfil de alteração de granito-gnaisse é estudado objetivando um melhor conhecimento das propriedades mecânicas e hidráulicas de solos residuais. A feição estudada encontra-se no município de Campo Magro, região Metropolitana de Curitiba. A região situa-se na borda da Bacia de Curitiba, acima de 900 metros, fortemente sujeita aos fenômenos tect
Publicado em: 2008
-
5. Contribuição ao estudo dos métodos de ensaio na avaliação das reações álcali-agregado em concretos. / Contribution to the study of test methods in assessing alkali-aggregate reactions in concrete.
Many concrete structures have been suffering from alkali-aggregate reactions (AAR) since the last decades in Brazil and around the world. The reactions generate expansions that could compromise the strength of a concrete structure as well as its performance in service and its durability. Nowadays, it is completely possible to detect AAR in the field, but rep
Publicado em: 2008
-
6. Geocronology, isotopic geochemistry and geochemical of the dioritic-granitic plutonism between Lavras and Conselheiro Lafaiete: implicatins to paleoproterozoic evolution of Mineiro Belt central part / Geocronologia, geoquímica isotópica e litoquímica do plutonismo diorítico-granítico entre Lavras e Conselheiro Lafaiete: implicações para a evolução paleoproterozóica da parte central do Cinturão Mineiro
The study area is located in the southern border of the São Francisco Craton, Mineiro Belt. This portion comprises part of the Sul Mineira Province. In this context occurs medium to high metamorfic grade Archean and Paleoproterozoic terrains mosaic and granite-greenstone associations. The plutonic bodies, studied in this work, make part of volumous paleopro
Publicado em: 2007
-
7. Contribution to Crushed Stone Petrography / Contribuição à petrografia de pedra britada
It is extremely important to know the physical and chemical properties of aggregate mineralogical composition so that the construction where they will be used is not compromised. In this sense, knowing the petrography and mineralogy is as necessary as knowing the geology of the rock deposit to be developed as a source of crushed stone. The main purpose of th
Publicado em: 2007
-
8. INFLUÊNCIA DE ADIÇÕES MINERAIS POZOLÂNICAS E DE FINOS DE PEDREIRA NAS PROPRIEDADES MECÂNICAS E NA MICROESTRUTURA DO CONCRETO AUTO-ADENSÁVEL / Influence of the mineral additions and the quarry dust in the mechanical properties and the microstructure of the self-compacting concrete
For the benefits of its properties in fresh state, self-compacting concrete (SCC) demands a high powder content in the composition, nearby 450kg/m. The quarry dust, resultant material of the coarse aggregate production, can b considered as an economic and sustainable alternative for the development of the SCC. As well as the quarry dust, mineral additions, i
Publicado em: 2007
-
9. BIO-PHYSICALCHEMICAL-MINERALOGICAL AND MICROMORPHOLOGICAL CHARACTERIZATION OF A GRANITE-GNEISS WEATHERING PROFILE FROM CURITIBA, PR / CARACTERIZAÇÃO BIO-FÍSICO-QUÍMICO-MINERALÓGICA E MICROMORFOLÓGICA DE UM PERFIL DE ALTERAÇÃO DE GRANITOGNAISSE DE CURITIBA, PR
Desde o século passado estuda-se no Brasil a seqüência de camadas resultante da decomposição de uma rocha. Estes perfis de alteração são desde então objetos de estudo de vários autores pela grande importância que apresentam na Engenharia Geotécnica, principalmente em países de clima tropical, como o Brasil. Os diferentes tipos e graus de intempe
Publicado em: 2006
-
10. Petrografic and geochemistry study of the embasament and San Ignácio and Sunsás granitic rocks of the San Ramon, Concepción region, SW Amazonian Craton of Bolívia / Estudo petrográfico e geoquímico do embasamento e dos granitóides San Ignácio e Sunsás da região San Ramon, Concepción, SW do cráton amazônico da Bolívia.
The main objectives of this work were the petrographic characterization and geochemistry studies of the Sunsas granitic intrusions and their country rocks in the Bolivian sector of the SW Amazonian craton. The studied units comprise the Sunsas Orogeny granitoids (1,30 Ga-950 Ma), the basement (>1400 Ma) including La Chiquitania gneiss, enderbitic and graniti
Publicado em: 2006
-
11. Tectonic evolution of the Maranco-Poço Redondo Domain : records of the Cariris Velhos and Brasiliano orogenesis on the Sergipano belt, NE Brazil / Evolução tectonica do dominio Maranco-Poço Redondo : registro das orogeneses Cariris Velhos e Brasiliana na Faixa Sergipana, NE do Brasil
This Thesis aims to advance in the geological knowledge of the Sergipano Belt, by studying the tectonic evolution for two within seven lithotectonic domains: the Marancó -Poço Redondo Domain. To reach the objective a detailed field work, that used four geological maps (1:100.000) from the Carira Project (PLGB, DNPM-CPRM, 1988) as base maps and a Landsat im
Publicado em: 2005
-
12. Petrologia dos granitóides brasilianos associados à zona de cisalhamento Remígio-Pocinhos(PB)
The Brasiliano Cycle in the Seridó Belt (NE Brazil) is regarded mostly as a crustal reworking event, characterized by transcurrent or transpressional shear zones which operated under high temperature and low pressure conditions. In the eastern domain of this belt- the so-called São José de Campestre Massif (SJCM), a transtensional deformation regime is ev
Publicado em: 1998