Deep weathering, mostly in the Paleogene, combined with low erosion rates, account for the abundance and widespread distribution of supergene iron, manganese, and aluminum orebodies in this region.
AngloGold Ashanti Limited (AngloGold Ashanti) is a gold mining company with a portfolio of assets and differing orebody types in key gold producing regions.
Ore deposit is often composed of few independent orebodies located in different places in the space that must be interconnected into one integrated system.
In this paper, we examine the case when access points to orebodies lay in the Euclidean plane.
To analyse the risk associated with the mine plan which was determined based on the kriged resource model, its mining sequence, as presented in Fig. 8, was sequentially applied on the 20 orebody realisations generated in Sect. 2.
The distribution characteristics of displacement fields and plastic zones of the orebody were simulated in three different excavation cases, including the case of excavation artificial inducted roadway in the orebody, the case of horizontal or vertical excavation direction and the case of the upward or downward excavation order.
Increased exposure to lead from orebody and paint sources in utero was implicated in two cases, but there was no indication of previous exposure from the mothers' current blood leads, suggesting an acute rather than a chronic exposure for the mothers.
Plan views of the kriged and example of simulated orebody models are presented in Figs. 3 and 4. Open image in new window Fig. 3 Kriged resource model for Fe element Open image in new window Fig. 4 SGS realisation 1 for Fe element.
To understand ore-forming processes associated with mineral exploration, it is necessary to acquire geochemical information regarding orebody formation and mineralization in hydrothermal systems within the upper crust of the Earth in the past.
