Related by context. Frequent words. (Click for all words.) 69 magmatic 68 crustal 68 basalts 67 hydrothermal activity 67 volcanism 67 graben 65 igneous 65 depositional 65 extensional 65 lavas 65 tuffs 65 subduction 64 lithosphere 64 Proterozoic 64 hydrothermal alteration 64 granitic 64 continental crust 64 siliceous 63 mafic volcanics 63 intrusive rocks 63 basaltic 63 oceanic crust 62 breccia zones 62 Fig. 1A 62 intrusives 62 potassic alteration 62 mafic 62 volcanics 62 metasedimentary rocks 62 mineralizing 62 calcareous 61 Mesozoic 61 Late Cretaceous 61 Ordovician 61 caldera 61 felsic 61 facies 61 argillic alteration 61 jasperoid 61 Paleozoic 61 stratabound 60 biotite 60 overlies 60 carbonaceous 60 skarn mineralization 60 Carboniferous 60 tectonic 60 Uranium mineralization 60 brecciation 60 Quaternary 60 hydrothermal breccias 60 hydrothermal 60 sedimentary 60 sedimentary rocks 60 ultramafic rocks 60 interbedded 60 graphitic 59 volcanic 59 Paleocene 59 seismicity 59 stratigraphy 59 Precambrian 59 surficial 59 peridotite 59 quartz veinlets 59 ultramafic 59 gneiss 59 sulphide minerals 59 Fault Zone 59 sericite 59 tectonics 59 breccia pipe 59 mineralizing system 59 bornite 58 granites 58 sulphide bearing 58 volcanic rocks 58 marine sediments 58 andesite 58 argillite 58 chalcocite 58 quartz carbonate 58 mudstone 58 limestones 58 Oligocene 58 diorite 58 gravity anomaly 58 breccia zone 58 overlie 58 rhyolite 58 epithermal vein 58 sedimentary basin 58 metasediments 58 anisotropy 57 fluvial 57 Mineralisation 57 banded iron 57 syenite 57 ocean ridges 57 alluvium 57 Geologically