Related by context. Frequent words. (Click for all words.) 68 basaltic 67 pyroclastic flow 64 felsic 63 magmas 63 clasts 63 volcanic 62 tuffs 62 magmatic 62 hydrothermal breccias 61 siliceous 61 breccia zones 61 pyroxenite 61 argillic alteration 60 bornite 60 schists 60 explosive eruptions 60 basalts 60 hydrothermal activity 60 Mineralization occurs 60 jasperoid 59 mafic volcanics 59 weakly mineralized 59 sericite 59 andesite 59 carbonaceous 59 siltstones 59 surficial 59 interbedded 59 diatreme 59 graben 59 hydrothermal alteration 59 chalcocite 59 gneiss 59 potassic alteration 58 gabbro 58 brecciation 58 ultramafic 58 graphitic 58 biotite 58 mafic 58 brecciated 58 monzonite 58 quartz veinlets 58 lava flows 58 breccias 58 mafic volcanic rocks 57 sulphide bearing 57 carbonate replacement 57 breccia pipe 57 lavas 57 depositional 57 glacial till 57 ultramafic rocks 57 granitic 57 basalt 57 NW trending 57 breccia 57 limestones 57 stratabound 57 igneous 56 silicified 56 clay alteration 56 haematite 56 pyritic 56 peridotite 56 pyroclastic flows 56 metasedimentary rocks 56 sedimentary 56 quartz carbonate 56 intrusive rocks 56 disseminated sulphides 56 disseminated mineralization 56 ejecta 56 igneous rock 56 igneous rocks 55 volcanics 55 siltstone 55 rhyolite 55 lava tubes 55 Valles Marineris 55 lava 55 hangingwall 55 mineralizing 55 supergene 55 banded iron 55 pegmatites 55 mantos 55 porphyries 55 semi massive sulphides 55 gossan 55 massive sulphide mineralization 55 structurally controlled 55 pathfinder elements 55 intrusives 55 argillite 55 shear zones 55 Uranium mineralization 55 sulphide minerals 55 extensional 55 magma chamber 54 sulfide mineralization