OVERVIEW OF THE IMPACT OF MINING ON THE ... - IIED pubs

There is exploration, mainly for diamond, as well as gold, silver, PGEs, copper and nickel (ZGS, 2001).
4.9.3 Alluvial mining
Neither known nor likely.
4.9.4 Monitoring systems
ZINWA is currently setting one up.
4.9.5 Water quality data
None available.
4.9.6 Implications for water quality and quantity management
Until such time as any exploration activities prove fruitful, there will be no significant impact of mining in the subcatchment.
4.10 The Mwenezi sub-catchment
4.10.1 General description
4.10.1.1 Hydrology
This is Zones N1-N3 of Area B (ZSG, 1984). The Mwenezi rises west of Mberengwa and flows into the
Limpopo in Mozambique. The Mwenezi is dammed at Manyuchi in Zone N2.
4.10.1.2 Geology
See Figure 3.6 (ZGS, 1999). The Zimbabwe Craton underlies the northwest: granites and the Filabusi,
Belingwe and Mweza Greenstone Belts. The Great Dyke passes through the northwest of the sub-catchment.
The central area is underlain by Limpopo Belt gneises. Karoo basalts underlie the southeast and rhyolites, post
Karoo granites in the Mateke Hills and post Karoo sediments in the east.
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