نتایج جستجو برای: ancient gold mining activities
تعداد نتایج: 575299 فیلتر نتایج به سال:
the focus of this research work is on the determination of the impact of mining on the groundwater quality in the historical mining region of sw ashanti region in ghana. this work describes the characteristics of the groundwater chemistry and pollution of the aquifer in the gold-ore bearing formation, which is highly weathered and fractured. the fractures control the permeability and depth of t...
This article provides an overview of the first results from archaeological investigations at Wadi el-Sheikh in Egypt by the University of Vienna Middle Egypt Project. Chert was an important raw material used to produce tools, implements and jewelry in ancient times. Wadi el-Sheikh was exploited over thousands of years as it was probably the most important source of chert in Pharaonic civilizati...
This article presents a focused study of environmental management in small-scale gold mining, called garimpo, at the Tapajós River in the Amazon basin (Brazil). Environmental management is necessary in this very important area not only for Brazil but for the general world welfare. The fact that this is a very dispersed area, with a very low economic and education level, complicates the issues. ...
OBJECTIVE Traditional gold mining is associated with mercury exposure. Especially vulnerable to its neurotoxic effects is the developing nervous system of a child. We aimed to investigate risk factors of mercury exposure among children in a rural mining town in Chile. METHODS Using a validated questionnaire distributed to the parents of the children, a priori mercury risk factors, potential e...
OBJECTIVES To establish whether a specific community in a gold mining area, with potentially associated small-scale gold mining activities, was exposed to mercury. METHODS The community was situated in Mpumalanga, where some potential sources of mercury emissions may have an impact. Adults >or=18 years were considered eligible. Biological monitoring, supported by questionnaires, was applied. ...
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