Corporate Social Responsibility at African mines: Linking the past to the present

This paper traces the origins of the 'brand' of Corporate Social Responsibility (CSR)employed at large-scale mines across sub-Saharan Africa. Conceived within fortified resource enclaves, the policies adopted and actions taken in the area of CSR at many of the region's large-scale mines today have had had minimal effect on community wellbeing. Further examination reveals that contemporary CSR strategy in the region's mining sector is often a 'repackaging' and 'rebranding' of moves made by major operators during the colonial period and early years of country independence to pacify and engage local communities. Today, this work is being championed as CSR but failing to deliver much change, its impact minimized by the economic and political forces at work in an era of globalization, during which extractive industry enclaves that are disconnected from local economies have been able to flourish. As case study of Ghana, long one of the largest gold mining economies in sub-Saharan Africa, is used to illustrate these points. © 201

Geyserite in Hot-Spring Siliceous Sinter: Window on Earth’s Hottest Terrestrial (Paleo)environment and its Extreme Life

International audienceSiliceous hot-spring deposits, or sinters, typically form in active, terrestrial (on land), volcanic terrains where magmatically heated waters circulating through the shallow crust emerge at the Earth's surface as silica-charged geothermal fluids. Geyserites are sinters affiliated with the highest temperature (~ 75–100 °C), natural geothermal fluid emissions, comprising localized, lithologically distinctive, hydrothermal silica precipitates that develop around geysers, spouters and spring-vents. They demarcate the position of hot-fluid upflow zones useful for geothermal energy and epithermal mineral prospecting. Near-vent areas also are “extreme environment” settings for the growth of microbial biofilms at near-boiling temperatures. Microbial biosignatures (e.g., characteristic silicified microbial textures, carbon isotopes, genetic material, lipid biomarkers) may be extracted from modern geyserite. However, because of strong taphonomic filtering and subsequent diagenesis, fossils in geyserite are very rare in the pre-Quaternary sinter record which, in and of itself, is patchy in time and space back to about 400 Ma. Only a few old examples are known, such as geyserite reported from the Devonian Drummond Basin (Australia), Devonian Rhynie cherts (Scotland), and a new example described herein from the spectacularly well-preserved, Late Jurassic (150 Ma), Yellowstone-style geothermal landscapes of Patagonia, Argentina. There, geyserite is associated with fossil vent-mounds and silicified hydrothermal breccias of the Claudia sinter, which is geologically related to the world-class Cerro Vanguardia gold/silver deposit of the Deseado Massif, a part of the Chon Aike siliceous large igneous province. Tubular, filament-like micro-inclusions from Claudia were studied using integrated petrographic and laser micro-Raman analysis, the results of which suggest a biological origin. The putative fossils are enclosed within nodular geyserite, a texture typical of subaerial near-vent conditions. Overall, this worldwide review of geyserite confirms its significance as a mineralizing geological archive reflecting the nature of Earth's highest temperature, habitable terrestrial sedimentary environment. Hot-spring depositional settings also may serve as analogs for early Earth paleoenvironments because of their elevated temperature of formation, rapid mineralization by silica, and morphologically comparable carbonaceous material sourced from prokaryotes adapted to life at high temperatures

Gramalote y SENA unifican esfuerzos de formación en San Roque

Pequeños mineros del Municipio de San Roque, Antioquia, firmaron un acuerdo para realizar minería de manera legal. Y em todo este proceso los mineros contarán con el acompañante de entidades como el SENA, Alcaldía del Municipio, Secretaria de Minas y la empresa AngloGold Ashanti

Mining and risk of tuberculosis in sub-Saharan Africa.

OBJECTIVES: We estimated the relationship between mining and tuberculosis (TB) among countries in sub-Saharan Africa. METHODS: We used multivariate regression to estimate the contribution of mining activity to TB incidence, prevalence, and mortality, as well as rates of TB among people living with HIV, with control for economic, health system, and population confounders. RESULTS: Mining production was associated with higher population TB incidence rates (adjusted b = 0.093; 95% confidence interval [CI] = 0.067, 0.120; with an increase of mining production of 1 SD corresponding to about 33% higher TB incidence or 760,000 more incident cases), after adjustment for economic and population controls. Similar results were observed for TB prevalence and mortality, as well as with alternative measures of mining activity. Independent of HIV, there were significant associations between mining production and TB incidence in countries with high HIV prevalence (≥ 4% antenatal HIV prevalence; HIV-adjusted B = 0.066; 95% CI = 0.050, 0.082) and between log gold mining production and TB incidence in all studied countries (HIV-adjusted B = 0.053; 95% CI = 0.032, 0.073). CONCLUSIONS: Mining is a significant determinant of countrywide variation in TB among sub-Saharan African nations. Comprehensive TB control strategies should explicitly address the role of mining activity and environments in the epidemic