Related by context. Frequent words. (Click for all words.) 53 sulphidic 52 KINSHASA Congo Fabulous 52 Group Metals PGM 51 dolerite 51 Witwatersrand Basin 51 iron manganese 51 lateritic 50 sediment 50 Sedimentation 50 acidify 49 copper molybdenum gold 49 Polymetallic 49 Massive Sulphide 49 salinization 49 embayments 49 arsenic mercury 48 placer deposits 48 dolomitic 48 calcrete 48 alluvial diamonds 48 alluvial deposits 48 scheelite 48 alluvial mining 48 iron sulfate 48 sediment sampling 47 palaeo 47 Greenstone belt 47 sediments 47 Sediments 47 Senegal Tanzania 46 arsenic contaminated 46 gravels 46 uraniferous 46 interbedded 46 Mt Penck 46 tailings dams 46 Otjikoto 46 Volta Grande 45 diabase 45 Flin Flon Greenstone Belt 45 nitrate concentrations 45 silty 45 intersected mineralized 45 wolframite 45 JM Reef 45 silt 45 halite 45 chromitite 45 open pitable 45 bearing kimberlite 45 hydrous 45 Quebrada Blanca 45 Bokan Dotson Ridge 45 copper sulphide 45 lake sediments 45 Sediment 45 tailings dumps 45 gabbroic 45 silt laden 45 sulfide bearing 45 sedimentation 45 naturally occurring arsenic 44 Turbidity 44 anhydrite 44 silts 44 Ilmenite 44 embayment 44 salinisation 44 Porphyry Creek 44 dissolved salts 44 Alluvial 44 manganese dioxide 44 groundwater aquifer 44 cadmium chromium 44 Kipoi Central 44 gossanous 44 bentonite clay 44 Bushveld complex 44 diarrhea cramps nausea 44 geochemistry 44 andesitic 44 phosphorite 44 tailings 43 turbid water 43 mudstones 43 calcareous 43 drilling muds 43 sediment samples 43 UG2 reef 43 Crappie fair 43 Sulphuric acid 43 alluvium 43 Leachate 43 Aquifers 43 Isua 43 leaching 43 heavily polluted 43 Okavango River 43 iron oxides 43 basaltic 43 tremolite