The Banfora’s birimian greenstones belt is located in the western part of Burkina Faso (west Africa). Recent petrographic and lithogeochemical studies have highlighted plutons intruding the metasedimentary and metavo...The Banfora’s birimian greenstones belt is located in the western part of Burkina Faso (west Africa). Recent petrographic and lithogeochemical studies have highlighted plutons intruding the metasedimentary and metavolcanic series. These plutonic rocks are composed of leucogranites belonging to the so-called Ferkessedougou’s or Ferké’s batholith, granites, granodiorites, monzodiorites and quartz monzonites. From the lithogeochemical studies, these plutonic rocks have a calc-alkaline and peraluminous character. The rare earth elements spectra of the Ferké’s leucogranites let distinguished two sub-facies. One of the sub-facies is composed of quartz monzonite to granite, while the other is granitic sensu stricto. However, all these plutonic rocks were emplaced in a geodynamic context of subduction followed by collision.展开更多
The Pissy granite quarry of Ouagadougou in Burkina Faso exists since 2006, and it is a source of financial incomes for many poor families working there. The Problem-In-Context framework (PiC), lead the current study t...The Pissy granite quarry of Ouagadougou in Burkina Faso exists since 2006, and it is a source of financial incomes for many poor families working there. The Problem-In-Context framework (PiC), lead the current study to understand better the quarry exploitation and structuration. Different motivations guide the quarry actors. Through those motivations, different solutions were suggested, mainly the shutdown of the quarry as the best way to decrease the impacts of the quarry exploitation on the environment, particularly regarding the air pollution and the loss of biodiversity in the area. The Pissy granite quarry is not recognized by the country’s legislation and this study is presenting the site organization. They are three main actors on the site and the tertiary actors are the ones having more incomes comparing to the primary and secondary actors of the chain. There is a need to evaluate the shell life of the quarry if the shutdown is not the final option chosen by the country. This evaluation should be a way to restructure the field and to have more incomes from it. Many standards exist in the country to guide the quarries and mines exploitation but they do not have impact on the Pissy granite quarry because of its non-reorganization.展开更多
文摘The Banfora’s birimian greenstones belt is located in the western part of Burkina Faso (west Africa). Recent petrographic and lithogeochemical studies have highlighted plutons intruding the metasedimentary and metavolcanic series. These plutonic rocks are composed of leucogranites belonging to the so-called Ferkessedougou’s or Ferké’s batholith, granites, granodiorites, monzodiorites and quartz monzonites. From the lithogeochemical studies, these plutonic rocks have a calc-alkaline and peraluminous character. The rare earth elements spectra of the Ferké’s leucogranites let distinguished two sub-facies. One of the sub-facies is composed of quartz monzonite to granite, while the other is granitic sensu stricto. However, all these plutonic rocks were emplaced in a geodynamic context of subduction followed by collision.
文摘The Pissy granite quarry of Ouagadougou in Burkina Faso exists since 2006, and it is a source of financial incomes for many poor families working there. The Problem-In-Context framework (PiC), lead the current study to understand better the quarry exploitation and structuration. Different motivations guide the quarry actors. Through those motivations, different solutions were suggested, mainly the shutdown of the quarry as the best way to decrease the impacts of the quarry exploitation on the environment, particularly regarding the air pollution and the loss of biodiversity in the area. The Pissy granite quarry is not recognized by the country’s legislation and this study is presenting the site organization. They are three main actors on the site and the tertiary actors are the ones having more incomes comparing to the primary and secondary actors of the chain. There is a need to evaluate the shell life of the quarry if the shutdown is not the final option chosen by the country. This evaluation should be a way to restructure the field and to have more incomes from it. Many standards exist in the country to guide the quarries and mines exploitation but they do not have impact on the Pissy granite quarry because of its non-reorganization.
