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(Click for frequent words.) 74 bearing breccias 73 mineralized shear zones 72 mineralized showings 72 arsenic anomalies 70 porphyries 70 bearing quartz veins 69 mineralized quartz veins 69 mineral occurrences 69 epithermal veins 68 quartz pyrite veins 68 massive sulphide lenses 68 epithermal silver 68 epithermal quartz veins 68 stockwork zones 68 mineralizations 68 Cu Au mineralization 68 quartz sulphide veins 67 anomalous zones 67 bearing quartz stockwork 67 quartz tourmaline veins 67 rich VMS mineralization 67 tungsten mineralization 67 surface bulk tonnage 67 mineralized horizons 67 bearing sulphide mineralization 67 Ni Cu PGM mineralization 66 copper molybdenum gold 66 quartz adularia veins 66 auriferous zones 66 gossans 66 artisanal workings 66 soil geochemical anomalies 66 mineralized lenses 66 Thor Trend 66 surface outcrops 66 breccia zones 66 untested geophysical anomalies 66 mineralized outcrops 66 conductive anomalies 66 massive sulphide zones 66 mineralized veins 66 copper molybdenum mineralization 66 footwall zones 66 bearing quartz vein 66 epithermal gold silver 66 northerly trending 66 NNW trending 66 massive sulphide deposits 66 mineralized shears 66 soil anomalies 66 geochemical anomalies 66 subparallel 66 mineralized structures 65 sulphide lenses 65 gold porphyry mineralization 65 alteration zones 65 Au Cu mineralization 65 potentially bulk mineable 65 en echelon 65 mesothermal quartz veins 65 sulphide deposits 65 auriferous quartz veins 65 EW trending 65 granitoid bodies 65 vein breccias 65 niobium mineralization 65 open pittable gold 65 pegmatite dykes 65 Frankfield East 65 skarn mineralization 65 outcropping mineralization 65 narrow quartz veins 65 IOCG deposits 65 Magistral deposits 65 garimpos 65 skarn deposits 65 favorable stratigraphy 65 mineralized breccias 65 magnetite skarn 65 formation BIF 65 vanadium mineralization 65 quartz sulfide 65 mineralized zones intersected 65 conductive zones 65 quartz vein zones 65 sulphide occurrences 64 stratabound 64 massive sulphide horizons 64 Orogrande Shear Zone 64 mineralized skarn 64 Ni Cu PGE mineralization 64 anomalous soil geochemistry 64 Mt Penck 64 gold geochemical anomalies 64 mineralized quartz vein 64 ENE trending 64 stockwork breccia 64 soil geochemical anomaly 64 lithological contacts 64 intrusives 64 PGM mineralization 64 porphyry deposit 64 stockwork mineralization 64 greenstone belts 64 mineralized occurrences 64 stockwork veins 64 mineralized zones 64 Archean aged 64 geochemically anomalous 64 REE bearing 64 stratigraphic horizons 64 polymetallic mineralization 64 mineralized pegmatite 64 Malrok 64 mineralized breccia 64 quartz stockworks 64 surface geochemical anomalies 64 platinum palladium mineralization 64 EM conductors 64 gossan zones 64 bulk mineable gold 64 soil geochemical survey 64 excavator trenches 64 copper sulphide 64 quartz reefs 64 Goldbanks 64 Mineralized zones 64 porphyry copper deposit 64 disseminated sulphide mineralization 63 breccia pipes 63 IP chargeability anomalies 63 holes intersected mineralization 63 bulk mineable 63 massive sulphide VMS 63 orogenic gold deposits 63 volcanic stratigraphy 63 radiometric anomalies 63 silver indium 63 antimony mineralization 63 sulphide zones 63 kimberlite dykes 63 carbonate veins 63 high sulphidation 63 vein stockworks 63 arsenopyrite veins 63 epithermal precious metals 63 vuggy silica quartz alunite 63 metasediment 63 pegmatites 63 shear zones 63 NE trending 63 zinc mineralization 63 gold molybdenum porphyry 63 greenstones 63 shallowly dipping 63 meta sedimentary rocks 63 chargeability anomalies 63 orogenic gold 63 Uruachic Camp 63 deformation zone 63 alaskite 63 Tintina Gold Belt 63 stockworks 63 Kenville Gold Mine 63 Planchas de Plata 63 kimberlite dyke 63 Gongondy 63 spodumene bearing pegmatites 63 copper skarn 63 northeast trending shear 63 epithermal gold mineralization 63 low sulphidation 63 airborne geophysical anomalies 63 Quartz veins 63 Aircore drilling 63 VMS deposit 63 felsic volcanic rocks 63 coincident anomalous 63 epithermal gold deposits 63 polymetallic deposit 63 nickel sulphide mineralization 63 Dumico 63 andesitic rocks 63 sulphide breccia 63 Djambaye II 63 quartz carbonate veins 63 bulk minable 63 deformation corridor 63 volcanogenic massive sulfide VMS 63 mineralized corridor 63 mineralization occurs 63 mineralized intrusive 63 massive sulphide occurrences 63 mineralized shear zone 63 epithermal deposit 62 polymetallic showings 62 silver indium zinc 62 stockwork vein 62 Homestake Silver 62 electromagnetic EM conductors 62 resistivity anomalies 62 Porcupine Destor Fault Zone 62 sheeted vein 62 gold mineralization intersected 62 manto mineralization 62 vein widths 62 quartz veins 62 Sulphide mineralization 62 andesite volcanics 62 silicified breccias 62 volcanogenic 62 volcanogenic massive sulphide 62 structural lineament 62 mineralized lodes 62 mineralized stockwork 62 Miwah Gold Zone 62 northerly trending structures 62 cobalt mineralization 62 hydrothermally altered 62 chromite occurrences 62 outcropping quartz veins 62 magnetite bearing 62 lapilli tuff 62 molybdenum porphyry 62 surface trenching 62 mafic rocks 62 copper molybdenum silver 62 quartz stockwork zone 62 Manfo Property 62 vein breccia 62 sericite pyrite 62 ultramafics 62 vein swarms 62 mesothermal gold 62 silicified zones 62 diatremes 62 magnetic anomalies 62 Manzako 62 induced polarization anomalies 62 bearing hydrothermal 62 gravity anomalies 62 trending mineralized 62 epithermal alteration 62 uranium occurrences 62 skarns 62 itabirite 62 WNW trending 62 banded quartz veins 62 easterly trending 62 IP geophysical anomalies 62 silicified breccia 62 scheelite bearing 62 magnetite pyrite 62 northeast trending 62 felsic intrusives 62 Banded Iron Formation 62 dipping quartz veins 62 Shaft Zone 62 quartz sulphide 62 diamond drillholes 62 Zam Zam Shenkman 62 sulphide bearing 62 hydrothermal brecciation 62 sulfide mineralization 62 Matoush fault 62 Sleeping Giant Zone 62 trace chalcopyrite 62 extensive artisanal workings 62 Leprechaun Pond 62 vein stockwork 62 sulphide veins 62 PGM deposits 62 potentially open pittable 62 sulfosalts 62 hematite mineralization 62 volcanic sedimentary 62 lithologies 62 arsenopyrite mineralization 62 mechanical trenching 62 massive sulfide mineralization 61 South Minita 61 auriferous 61 alunite alteration 61 outcropping veins 61 Soil geochemistry 61 Chiis 61 hydrothermal alteration zones 61 volcanogenic massive sulphide mineralization 61 Chucara 61 quartz carbonate 61 LONG Bars 61 kimberlite occurrences 61 airborne magnetic anomalies 61 vein outcrops 61 copper molybdenum porphyry 61 Piaba deposit 61 mafic volcanic rocks 61 manganese mineralization 61 quartz stringers 61 sulfide deposits 61 diorite porphyry 61 Birimian metasediments 61 hydrothermal alteration 61 PGE mineralization 61 trending steeply dipping 61 porphyry intrusions 61 Higo Blanco 61 stratigraphic interval 61 vein intercepts 61 calcrete sampling 61 Mineralization occurs 61 Las Bolas 61 altered volcanic rocks 61 disseminated sulphide 61 northwest trending 61 Cassiar Gold Property 61 geological geochemical 61 Geophysical surveys 61 variably altered 61 lamprophyre 61 Junnagunna 61 #.#g t Au [004] 61 porphyry skarn 61 Solotomo 61 sulphide intersections 61 greenstone belt 61 amphibolites 61 Kiggavik deposits 61 Porcupine Destor Fault 61 hydrothermal breccias 61 Cerro La Paila 61 carbonatite complex 61 mineralized envelope 61 vuggy silica 61 anomalous zinc 61 Wellgreen Property 61 volcanic massive sulphide 61 sulphide deposit 61 quartz tourmaline 61 dyke swarm 61 bearing quartz carbonate 61 EM anomalies 61 parallel quartz veins 61 kimberlite float 61 anomalous molybdenum 61 Tortigny deposit 61 Pinguino property 61 bulk tonnage gold 61 Pokukrom West 61 sulphidation gold 61 Cadillac Break 61 veins stockworks 61 calc silicate 61 Tertiary volcanic rocks 61 VTEM anomalies 61 sulfidation style 61 chromite mineralization 61 mafic intrusions 61 Carbonatite Complex 61 REE mineralization 61 magmatic nickel copper 61 fault splays 61 breccia mineralization 61 Hallnor 61 Lemarchant Prospect 61 ultramafic intrusives 61 electromagnetic conductors 61 paleo placer 61 mafic ultramafic rocks 61 El Domo deposit 61 anomalous mineralization 61 altered volcanics 61 mineralized vein 61 quartz sericite 61 copper skarn mineralization 61 Santa Margarita vein 61 advanced argillic alteration 61 airborne anomalies 61 bedrock conductors 61 Fayolle deposit 61 porphyry intrusion 61 Angela Vein 61 felsic intrusions 61 mineralized hydrothermal 61 quartz carbonate vein 61 Tintina Gold Province 61 excavator trenching 61 anomalous concentrations 61 low sulfidation 61 silver epithermal vein 61 stratigraphic horizon 61 lithium tantalum 61 intrusive breccia 61 Colnic 60 Au Ag mineralization 60 copper platinum palladium 60 jasperoid 60 porphyry copper gold 60 Black Thor chromite 60 Nyafe 60 quartz veins containing 60 placer deposits 60 open pittable 60 metavolcanic 60 jasperoids 60 MMI anomalies 60 epithermal vein deposits 60 NNE trending 60 Djambaye II zone 60 Destor Porcupine fault 60 mafic volcanics 60 Yaxtché deposit 60 Bonanza Ledge 60 alkaline intrusive complex 60 mafic ultramafic intrusions 60 Bombore 60 epithermal precious 60 Vaquillas 60 coincident geophysical 60 Cretaceous sandstones 60 variably mineralized 60 Garrcon shaft 60 soil anomalism 60 sulphide intercepts 60 polymetallic veins 60 mineralizing system 60 Hardrock Project 60 UG2 reefs 60 DPFZ 60 porphyry mineralization 60 disseminated sulfides 60 stratiform 60 chemical metasedimentary rocks 60 drillhole intersections 60 pegmatitic 60 mineralized quartz veining 60 Lac Cinquante deposit 60 Ultramafic Zone 60 sulphidized 60 #.#gpt gold [001] 60 Silbak Premier Mine 60 Dadiangou 60 epithermal vein systems 60 granitic intrusions 60 gabbro intrusive 60 Shirotnaia 60 skarn rocks 60 ultramafic rocks 60 PG# Zone 60 felsic dikes 60 gossanous 60 Volcanogenic Massive Sulphide VMS 60 diorites 60 Roughrider East 60 stockwork veining 60 F2 Zone 60 felsic rocks 60 outcropping vein 60 epithermal gold vein 60 Kerekounda 60 radiometric anomaly 60 diamondiferous kimberlite pipes 60 sulphosalts 60 footwall mineralization 60 northwesterly trending 60 shearing alteration 60 Okohongo target 60 Nueva Concepcion 60 massive sulphide intersections 60 pyrite chalcopyrite 60 anomalies coincident 60 gold geochemical anomaly 60 intermediate sulphidation 60 geophysical conductors 60 gold anomalism 60 Klaza Zone 60 Au Cu 60 VTEM conductors 60 Hoyle Pond 60 Dioulafoundou 60 lithologic 60 La Bodega zone 60 banded iron 60 Athabasca unconformity 60 Ixtaca 60 massive sulphide deposit 60 mafic intrusive 60 quartz sericite pyrite alteration 60 Rattlesnake Hills Wyoming 60 sulphide mineralized 60 mineralized horizon 60 quartz tourmaline breccia 60 stringer sulphides 60 mafic dykes 60 Guayabales 60 VTEM targets 60 nickel laterite mineralization 60 stockwork veinlets 60 Ag Pb Zn 60 Ni Cu PGM 60 massive sulfide VMS 60 El Torno 60 Taurus Deposit 60 bearing sulphides 60 banded quartz 60 IOCG targets 60 copper mineralization 60 anomalism 60 lodes 60 gold copper porphyry 60 Abitibi greenstone belt 60 pyrite alteration 60 Klaza property 60 silicified zone 60 prolific Key Tuffite 60 hangingwall 60 metavolcanic rocks 60 alluvial diamond deposits 60 previously unsampled 60 Fobiri 60 Marge Vein 60 coincident magnetic 60 VTEM anomaly 60 eluvial 60 quartz magnetite 60 felsic volcanics 60 granitic intrusive 60 aeromagnetic anomalies 60 stockwork zone 60 Longshot Ridge 60 molybdenite mineralization 60 VMS deposits 60 NN Zone 60 Proterozoic rocks 60 metasedimentary 60 volcanogenic massive sulphide VMS 59 Zuun Mod deposit 59 porphyry intrusive 59 granitoids 59 mineralized boulders 59 sericite carbonate 59 acid leached 59 silicic 59 chalcedonic 59 quartz vein stockworks 59 bulk tonnage mineralization 59 molybdenum tungsten 59 pathfinder elements 59 structurally controlled 59 mineralized drill intercepts 59 Norlartic 59 quartz breccia 59 disseminated mineralization 59 Sudbury Breccia 59 Riscos 59 stringer mineralization 59 silicified limestone 59 Los Zorros 59 lode gold 59 northwest trending shear 59 bulk minable gold 59 Lac Mantouchiche uranium 59 molybdenum mineralization 59 magnetite alteration 59 FDN deposit 59 Ixtaca zone 59 poly metallic 59 pyroxenite 59 graphitic horizons 59 uranium vanadium mineralization 59 quartz lode 59 Nixon Bartleman 59 Calandria Sur 59 El Compas vein 59 Money Knob 59 Pucarana 59 Akasaba Mine 59 mineralized shear 59 Deseado Massif 59 footwall rocks 59 untested geophysical 59 Colquipucro 59 Minita deposit 59 pyrite veins 59 magmatic sulphide 59 paleochannel 59 volcano sedimentary 59 Siribaya mega structure 59 Talat Gadalla 59 potentially mineable 59 soil geochemical surveys 59 prolifically mineralized 59 bearing kimberlite 59 syenite porphyry 59 Tintina gold 59 Ni Cu PGE 59 Tulks South 59 gold mineralization 59 Iron Oxide Copper 59 Uranium mineralization 59 mineralization encountered 59 rhyolite tuffs 59 Puella Bay 59 lithological 59 diorite intrusion 59 massive sulphide lens 59 epithermal gold 59 quartz hematite 59 schists 59 granodiorite intrusive 59 breccia hosted 59 Epithermal 59 open pitable 59 pegmatite dikes 59 laterite mineralization 59 Cheminis 59 magnetite ilmenite 59 subvertical 59 Cortez Trend 59 rhyolites 59 felsic dykes 59 Louvicourt 59 Permo Carboniferous 59 Sisson Brook 59 rhyolite domes 59 Quesnel Trough 59 meta sediments 59 Sachigo River 59 rhyolite porphyry 59 El Compas 59 intersected sulphide 59 Haquira Project 59 prospective stratigraphy 59 alteration assemblages 59 Penasco Quemado 59 quartz porphyry 59 unconformity type 59 skarn zones 59 Torlon Hill zinc 59 porphyry deposits 59 steeply dipping 59 poly metallic mines 59 Hache lens 59 infill holes 59 feldspar porphyry 59 Las Bolas Los Hilos 59 Las Boquillas 59 Casa Berardi Mine 59 quartz tourmaline vein 59 El Rayo structure 59 carbonate veining 59 sheeted quartz veins 59 Heruga Deposit 59 tuffaceous 59 massive sulphide mineralization 59 uraniferous 59 sericite schist 59 Chucapaca 59 massive sulphide horizon 59 drillholes 59 Proterozoic sediments 59 mineralized porphyry 59 SEDEX zinc lead 59 Jabali vein system 59 Roughrider uranium deposit 59 Hinge Zone 59 ankerite 59 Minapampa Zone 59 RRZE 59 mineralized quartz 59 ultramafic intrusion 59 ODM# 59 quartz calcite 59 exhalative 59 IOCG mineralization 59 adit sampling 59 disseminated arsenopyrite 59 Nastia deserved 59 epithermal gold targets 59 strongly silicified 59 pyrite pyrrhotite chalcopyrite 59 epithermal vein 59 sedimentary formations 59 alluvial workings 59 kimberlitic bodies 59 altered rhyolite 59 Quebrada Verde 59 quartz veinlets 59 spodumene bearing 59 Pinaya 59 @ #.#g t [002] 59 Skukum Creek gold 59 calcareous siltstones 59 Cu Zn 59 structural lineaments 59 zinc sulphides 59 ultramafic intrusive 59 drillholes totaling 59 polymetallic volcanogenic massive sulphide 59 advanced argillic 59 iron sulphides 59 chalcopyrite sphalerite 59 Southeast Pediment 59 multi kilometric 59 Wellgreen Mine Property 59 surface geochemical sampling 59 syenite intrusive 59 kimberlite pipes 59 drillholes intersected 59 Yaxtche deposit 59 epithermal mineral 59 Lapa Mine 59 adits 59 Cerro Moly 59 Adumbi mine 59 mineralized dykes 59 porphyry Cu 59 Saza Shear Zone 59 La Mascota zone 59 South Barnat deposit 59 Bejucosa 59 El Quevar project 59 mafic intrusion 59 pyrite arsenopyrite 59 Ouro Roxo 59 felsic volcanic 59 outcrop sampling 59 Middle Cauca 59 altered felsic volcanic rocks 59 quartz chlorite 59 Barones Tailings Project 59 mineralized porphyry copper 58 porphyry dikes 58 Au Cu Ag 58 Coneto 58 detailed geologic mapping 58 Eskay Creek Silbak Premier 58 garimpeiro workings 58 Djambaye 2 58 carbonatites 58 potassically altered 58 Pericones property 58 AHGZ 58 Beiya Gold Mine 58 South Miwah Bluff 58 massive sulphides 58 Mangazeisky 58 Korkan 58 meta sedimentary 58 Avion Tabakoto 58 alteration haloes 58 Geological mapping 58 chromitite layers 58 Tyrrell Shear Zone 58 geologically mapped 58 Selwyn Basin 58 Nose Deposit 58 poly metallic mineralization 58 magnetic lineament 58 radon anomalies 58 Ni Cu mineralization 58 bornite chalcopyrite 58 Dioulafoundou zone 58 Twangiza Namoya 58 arsenopyrite bearing 58 kimberlitic 58 palaeochannels 58 quartz muscovite 58 prolific Carlin Trend 58 grade drill intercepts 58 molybdenite bearing 58 gabbroic rocks 58 chalcopyrite mineralization 58 Kavola East 58 mineralized envelopes 58 pyrite sphalerite 58 Birimian 58 nickel laterite deposits 58 Detailed mapping 58 Geologic mapping 58 mineralized mantos 58 Chalcopyrite 58 JM Reef 58 quartz stockwork 58 stockwork veined 58 Mikwam 58 grading #.#g t [001] 58 Fayolle property 58 trending faults 58 mineralized interval 58 tonalite 58 anomalous geochemical 58 Porcupine Destor 58 Sulphide Shear Zone 58 adularia 58 hydrothermal breccia 58 mineralized porphyries 58 Kerr Addison 58 porphyry intrusives 58 intrusive rocks 58 wallrock 58 Kigosi 58 mantos 58 La Morocha 58 sphalerite zinc 58 Rare Earth Element REE 58 Footwall Zone 58 IP geophysical surveys 58 porphyritic 58 ignimbrite 58 supergene mineralization 58 Mineralized Corridor 58 pyrrhotite pyrite 58 Aappaluttoq 58 low sulfidation epithermal 58 conductivity anomalies 58 Goldstorm 58 quartz carbonate veining 58 alteration halos 58 Besakoa 58 quartz molybdenite 58 silicified dacite dike 58 MNFWZ 58 Dubenski property 58 Culebrilla 58 diabase 58 vertical extents 58 stacked mineralized zones 58 Snowfield Zone 58 Tranquilo Trend 58 3Ace 58 quartz biotite 58 auriferous veins 58 Quartz veining 58 Pokukrom East 58 Cu Au 58 Naciente Quebrada Pedregosa 58 diamondiferous kimberlites 58 ultramafic mafic 58 mineralized widths 58 Filo de Oro 58 Tyranite 58 Sindirgi 58 Vindaloo zone 58 South Tally Pond 58 Ampeha 58 underground mineable 58 grade bulk tonnage 58 Onkelo 58 @ #.#g t [001] 58 sulphidation 58 pyrophyllite 58 Greenstone belt 58 mineralizing 58 pyrite magnetite 58 Bellhaven controls 58 SEDEX 58 dipole dipole IP 58 structural stratigraphic 58 garimpeiro 58 porphyry copper mineralization 58 ODAE 58 porphyry Cu Mo 58 prolific Val d'Or 58 Brucejack Project 58 Cominco Zone 58 Cosmo Howley corridor 58 Pitarrilla 58 felsic intrusive rocks 58 Cobre Grande 58 rich Ambler volcanogenic 58 Au Ag Pb Zn 58 Moly Brook 58 quartz veins veinlets 58 andesites 58 Kambalda style 58 gabbroic 58 Larder Lake Property 58 altered porphyry 58 Pb Zn 58 parallel shear zones 58 Kena Property 58 Bokan Dotson Ridge 58 Tertiary volcanics 58 mapping trenching 58 Magistral Project 58 airborne EM anomalies 58 Surface sampling 58 quartz pyrite 58 #m@#.# % [003] 58 copper molybdenum 58 copper sulphides 58 sulphide stockwork 58 chromite deposits 58 intervals assaying 58 calcite veins 58 sulfidation epithermal gold 58 Mankarga 58 element REE mineralization 58 kaolinite 58 enriched massive sulphide 58 unpatented lode claims 58 Riscos de Oro 58 Brucejack 58 chromitite 58 Zn Pb 58 synvolcanic 58 magmatic sulphides 58 Picachos 58 bulk mineable deposit 58 anticlinal structure 58 geochemical surveying 58 holes RR# 58 mineralized intercepts 58 sheeted veins 58 airborne magnetometer survey 58 MMI soil geochemical 58 anomalous uranium 58 ultramafic rock 58 rhyolite dome 58 kimberlite phases 58 massive sulphide veins 58 VMS occurrences 58 intersected anomalous 58 epithermal deposits 58 disseminated chalcopyrite 58 Heruga deposit 58 Destor Porcupine Fault Zone 58 mineralized gabbro 58 Encanto Zone 58 copper porphyry 58 Chimiwungo 58 Siribaya Mega structure 58 orebodies 58 Pinaya Project 58 Molybdenum mineralization 58 mafic ultramafic 58 anastomosing 58 Mineralized Zone 58 shear zone 58 outcrop exposures 58 lithological units 58 electromagnetic anomalies 58 Destor Porcupine 58 Norrliden Polymetallic Deposit 58 epithermal bonanza 58 aircore holes 58 anomaly coincident 58 Kay Tanda 58 #g t [001] 58 Monterde property 58 Silica Ridge 58 sheeted quartz 58 Lac Herbin mine 58 West Pequop 58 disseminated sulphides 58 intermediate volcanics 58 Onaman 58 garnet skarn 57 propylitic 57 Fold Nose 57 carbonate replacement 57 polymetallic vein 57 induced polarization IP chargeability 57 mineralized dikes 57 Frio Sands 57 Archaean greenstone 57 massive pitchblende 57 Abitibi Greenstone belt 57 NW trending 57 aircore drilling 57 Goldcliff 57 Dombraly 57 Oreana trend 57 ounce Barrick Hemlo 57 El Orito vein 57 intense silicification 57 pyritic quartz 57 sedex 57 porphyry Cu Au 57 Bibiani Shear Zone 57 iron carbonate alteration 57 Yanfolila 57 Hoyle Pond underground 57 dacite porphyry 57 Ntaka intrusion 57 brecciated zones 57 intermediate metavolcanic rocks 57 #m@#.# g t [002] 57 Vortex Zone 57 Akie property 57 skarn horizons 57 Fault Zone 57 Piaba 57 sub Athabasca unconformity 57 soil geochemistry 57 holes #WR# 57 sericite altered 57 Tiriganiaq deposit