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Prospecção electromagnética no domínio do tempo aplicada a Olhos da Fervença, C...

A exsurgência cársica do sistema Jurássico Olhos da Fervença localiza-se no concelho de Cantanhede, distrito de Coimbra e ocorre no leito da Ribeira da Corujeira, sob uma forma borbulhante, como se fervesse. A formação jurássica está subjacente a uma cobertura de areias de duna, que impede a sua observação directa, recorrendo-se neste estudo à utilização de prospecção electromagnética no domínio do tempo, com o...

Sedimentary structure of the Nazaré coastal dunes (Portugal)

Distribuição do urânio nas várias fases-suporte em solos da área mineira da Cun...

The present study concerns the application of partial chemical extraction, in a parallel procedure, to evaluate the uranium distribution in different solid phases constituents of the soils in the vicinity of Cunha Baixa mining area in order to assess its environmental risk. In the surface horizon of the soils, uranium that reached total concentrations between 9.8 to 362 mg/kg was preferential bound to non-cryst...

Impacts on water, soil and plants from the abandoned Miguel Vacas copper mine, ...

Soil, water and plant geochemistry was studied around the Miguel Vacas copper mine (Alentejo, SE Portugal), which stopped its exploitation and processing activities in 1991. After closure waste-rock piles remained exposed to weathering. The copper ore was mainly composed of copper phosphates and carbonates. Remediation actions were insufficient to prevent the spreading of waste-rock materials to surrounding far...