Buscar
Mostrando ítems 1-10 de 355
Anthropogenic impacts on mineral weathering: A statistical perspective
(2013-09-01)
Correspondence Analysis was adopted as tool for investigating the statistical structure of hydrochemical and weathering datasets of groundwater samples, with the main purpose of identifying impacts on mineral weathering ...
Weathering of metapelites from the Quadrilátero Ferrífero mineral province, southeastern Brazil
(Bulletin of Engineering Geology and the Environment, 2019)
Gold-bearing iron duricrust in Central Brazil
(1991-11-01)
In the Cuiabá region-State of Mato Grosso, Central Brazil-primary gold mineralization is hosted by two generations of quartz veins in Precambrian metamorphic terrains of the Cuiabá Group. Gold is mined from the veins and ...
Utility of on- and off-farm weather records for studies in genetics of heat tolerance
(Livestock Science, 2018)
Use of U-isotope disequilibrium to evaluate the weathering rate and fertilizer-derived uranium in São Paulo state, Brazil
(Springer, 2003-07-01)
The U-disequilibrium method was utilized to evaluate the velocity of alteration of rocks and fertilizer-derived uranium in the Corumbatai River basin, São Paulo state, Brazil. The Corumbatai River basin is affected by the ...
Weathering rates at Alto Sorocaba basin, Brazil, using U-isotopes and major cations
(Springer, 2010-09-01)
The aim of this paper was to evaluate the chemical weathering rate at Alto Sorocaba basin, So Paulo State, Brazil, as it is an important parameter on geomorphological characterization of continents. Several tools may be ...
Hydrochemistry and weathering rates on Corumbatai River basin, São Paulo State, Brazil
(Elsevier B.V., 2010-03-30)
This work was held at the Corumbatai River basin that is inserted within the giant Parana sedimentary basin (Paleozoic-Cenozoic) in South America. The Corumbatai River is the major river draining the area and its water is ...
Determination of weathering rate of the Morro do Ferro Th-REEs deposit, Brazil using U-isotope method
(Elsevier B.V., 2007-05-01)
The weathering rate was estimated by changes in U-214/U-238 activity ratio (AR) and U content of rocks, borehole spoil and surface water samples at the Morro do Ferro Th-REEs deposit. The deposit is situated in the Pocos ...
Fenologia e artrópodes de Copaifera langsdorffii Desf. no cerrado
(2006-02-01)
There was evaluated the phenology and arthropods as well as the effect of weather on copaiba (Copaifera langsdorffii Desf.) (Leguminoseae). The emission of new leaves and inflorescences as well as the opening of them ...