Related by context. Frequent words. (Click for all words.) 66 igneous rocks 65 sulphide bearing 65 tuffs 65 dacite 64 hydrothermally altered 64 hydrothermal breccia 64 breccia zones 64 Mineralization occurs 64 clasts 64 banded iron 63 basaltic 63 basalts 63 surficial 63 calcareous 63 copper oxides 63 interbedded 62 igneous rock 62 marine sediments 62 siliceous 62 hydrothermal breccias 62 Mineralization consists 62 jasperoid 62 felsic volcanic 62 quartz carbonate 62 subduction zones 62 breccia pipes 62 crustal 62 gneiss 62 oceanic crust 62 mafic volcanic 61 siltstones 61 graben 61 lithosphere 61 sedimentary rocks 61 quartz stockwork 61 mudstone 61 peridotite 61 continental crust 61 quartz veinlets 61 sedimentary 61 glacial till 61 schists 61 metasedimentary rocks 61 haematite 61 graphitic 61 lavas 61 ocean ridges 61 biotite 60 alluvium 60 quartz monzonite 60 sediments 60 calcrete 60 talus 60 iron oxides 60 mafic volcanics 60 carbonaceous 60 argillic alteration 60 osmium 60 magmas 60 pyroxenite 60 ultramafic rocks 60 monzonite 59 mud volcanoes 59 syenite 59 pyritic 59 weakly mineralized 59 gossans 59 sericite 59 syncline 59 lava tubes 59 limestones 59 landforms 59 semi massive sulphide 59 igneous 59 manganese oxide 59 bathymetry 59 calcite 59 mafic volcanic rocks 59 Upper Cretaceous 59 alluvial deposits 59 porphyries 59 auriferous 58 diatreme 58 lithologic 58 facies 58 pyroclastic 58 stratigraphically 58 gabbro 58 magmatic 58 spherules 58 chalcocite 58 disseminated sulphides 58 monazite 58 sedimentary rock 58 anomalous radioactivity 58 massive sulphide deposits 58 andesite 58 placer deposits 58 veinlets 58 steeply dipping 58 kimberlitic