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(Click for frequent words.) 66 La Preciosa silver 63 Gramalote 63 Kay Tanda 63 Rio Zarza 63 Gramalote property 63 massive sulphide ores 63 Magistral Project 63 Curipamba 62 Pilunani 62 Las Boquillas 62 copper molybdenum porphyry 62 Las Bolas Los Hilos 61 Metates 61 stockwork breccia 61 Arapiraca Project 61 Penasco Quemado 61 bulk mineable 61 Pantanillo 61 Yoquivo 61 Higo Blanco 61 Ixtaca 61 Cumpie Hill 61 Mongora 61 gold copper porphyry 60 bulk mineable gold 60 potentially bulk mineable 60 Calandria Sur 60 Titiribi 60 molybdenum porphyry 60 La Verde 60 porphyry copper deposit 60 open pitable 60 Picachos 60 copper molybdenum silver 60 nickel laterite deposits 60 Cerro Las Minitas 60 Las Minitas 60 Sierra Mojada 60 Canadian Malartic gold 60 Minas de Ameca 60 copper skarn 60 Bongará 60 geological geochemical 59 Vaquillas 59 El Rayo silver 59 Sinchao Property 59 bulk minable 59 Thor Trend 59 Quebrada Verde 59 epithermal silver 59 copper molybdenum gold 59 Bokan Dotson Ridge 59 Planchas de Plata 59 gold silver Aranzazu 59 Magistral Mine 59 poly metallic 59 Tuligtic 59 Anuri kimberlite 59 tonnage bulk mineable 59 Incahuasi 59 Miguel Auza 59 mineralized hydrothermal 58 lithological contacts 58 Camino Rojo 58 Copaquire 58 Urumalqui 58 Promontorio mine 58 magmatic nickel copper 58 El Domo deposit 58 heap leachable 58 silver epithermal vein 58 copper porphyry 58 Canariaco Norte 58 sulphide deposits 58 Kena Property 58 grade bulk mineable 58 IP chargeability anomalies 58 carbonatite complex 58 Marta Norte 58 Cu Au mineralization 58 Deseado Massif 58 Serrote 58 Stikine Arch 58 bulk tonnage gold 58 Pitaloza 58 Opinaca Nord 58 owned Cerro Jumil 58 SAMEX 58 leachable copper 58 bulk mineable deposit 58 Yarumalito 58 Itigi Manyoni Uranium 58 El Cometa 58 epithermal gold deposits 58 Predilecta 57 Shyri 57 Vilcoro Gold Property 57 Guajes West 57 Porphyry Copper Project 57 Uruachic Camp 57 polymetallic massive sulphide 57 Calandria Norte 57 Aranzazu Project 57 stream sediment geochemical 57 Okohongo target 57 Ag Pb Zn 57 geological mapping sampling 57 Canariaco Norte copper 57 Bombore 57 vein breccia 57 Middle Cauca 57 Tulks South 57 Lone Pine Property 57 East Acma 57 Colnic porphyry 57 Jumping Josephine 57 Manfo Property 57 skarn mineralization 57 Atzam # 3A 57 Las Calandrias 57 Dadiangou 57 mineralized outcrops 57 El Creston 57 Zuun Mod molybdenum 57 Senior Geochemist 57 porphyries 57 grade epithermal gold 57 Corongo 57 Represa Zone 57 polymetallic mineralization 57 Promontorio 57 Rare Earth Element REE 57 epithermal quartz veins 57 epithermal gold mineralization 57 Pico Machay 57 bulk tonnage deposit 57 Barite Hill 57 skarn deposits 57 Canariaco 57 El Compas 57 volcanic massive sulphide 57 open pittable gold 57 Inmaculada Project 57 IOCG targets 57 low sulfidation epithermal 57 underground mineable 57 Tantamaco 57 Sulfato 57 El Creston molybdenum 56 Farellon 56 Palmarito Project 56 porphyry Cu Mo 56 Mirador Norte 56 TiTac 56 Chisna 56 Tarachi 56 porphyry deposits 56 formation BIF 56 nickel laterite mineralization 56 Canariaco Norte Copper 56 Colquipucro 56 Urique 56 Nueva Concepcion 56 cobalt mineralization 56 alaskite hosted 56 Riviere Dore 56 sulphidation epithermal gold 56 Wicheeda 56 mapping trenching 56 Los Zorros 56 Taviche 56 La Solucion 56 Pinguino property 56 Tejamen silver 56 Eastmain Mine 56 Angostura deposit 56 nickel laterite deposit 56 platinum palladium mineralization 56 Pulacayo 56 Barsele 56 Iron Oxide Copper 56 bulk minable gold 56 Njame 56 surface outcrops 56 epithermal veins 56 auriferous zones 56 Azulitas 56 Preliminary metallurgical 56 Bellekeno deposit 56 La Jojoba 56 sulphide occurrences 56 Drilling Confirms 56 Ida Dome 56 deepwater subsalt 56 bearing kimberlite 56 molybdenum tungsten 56 open pittable 56 Lomada de Leiva 56 bulk tonnage mineralization 56 Brucejack Project 55 antimony mineralization 55 Alto Quemado 55 geophysical geochemical 55 VTEM anomalies 55 Geophysical surveys 55 Cerro de Oro 55 Guayabito 55 heap leachable gold 55 Sinaloa Graben 55 Tahuehueto 55 Despoblados 55 surface bulk tonnage 55 Haquira Project 55 preliminary metallurgical testwork 55 Goldpines North 55 airborne geophysical anomalies 55 Ni Cu PGM 55 Ouro Roxo 55 Geological mapping 55 Ollachea Project 55 Zinc Lead 55 Anchaca 55 Deli Jovan 55 Magistral deposits 55 sulfidation style 55 Vetagrande 55 Shivee West 55 diatremes 55 Zona Alta 55 metallurgical characteristics 55 Pan de Azucar 55 polymetallic 55 Vynohradiv 55 Bulk Tonnage 55 Escondida Vein 55 Chucara 55 Viento Frio 55 Otish Uranium 55 alteration zones 55 Grew Creek 55 coincident geophysical 55 orogenic gold 55 Velardena Property 55 surface geochemical sampling 55 Solotomo 55 Luz del Cobre 55 Lipena 55 Nithi Mountain 55 Kelex 55 surface mineable 55 sylvinite 55 stratigraphic traps 55 El Quevar project 55 epithermal gold vein 55 sulfide mineralization 55 laterite mineralization 55 Skukum 55 REE bearing 55 bulk tonnage 55 Klaza property 55 stage Serrote Deposit 55 massive sulphide deposits 55 Southeast Pediment 55 La Bufa 55 Droujba kimberlite pipe 55 Drilling Resumes 55 Accha deposit 55 Nambija 55 Porphyry Copper 54 Pinaya 54 Copperstone gold 54 outcropping mineralization 54 Hadal Awatib 54 Bejucosa 54 Soil geochemical 54 volcanogenic massive sulfide 54 PGM deposit 54 West Cedartree Gold 54 porphyry style 54 La Josefina 54 geophysics prospecting 54 Tortigny deposit 54 Coneto 54 IOCG mineralization 54 Los Azules 54 Bellhaven controls 54 Cerro Casale gold 54 commercially mineable 54 Cerro Chorcha 54 Copper Mineralization 54 Sicera Sur 54 geologically mapped 54 Corcoesto 54 Dombraly 54 Silica Ridge 54 kimberlite occurrences 54 Copaquire copper molybdenum 54 Tagpura 54 quartz tourmaline breccia 54 Permo Carboniferous 54 copper molybdenum mineralization 54 IP geophysical anomalies 54 REN Property 54 Angostura Project 54 mineralized occurrences 54 veins stockworks 54 spokeswoman Erika Matich 54 Increible 6 54 Lac Pau 54 Barlevskoye 54 grade bulk tonnage 54 Mina Justa 54 surface trenching 54 Marmato Mountain 54 Commences Drill Program 54 Carotare 54 Haukiaho 54 excavator trenching 54 Ag Au 54 resource delineation 54 geological mapping trenching 54 previously unsampled 54 Zafranal 54 trenching sampling 54 diamondiferous kimberlites 54 Oxide Zinc 54 conductive zones 54 epithermal precious metals 54 Epithermal 54 Amaruk property 54 Colnic 54 Scott Wilson RPA 54 copper skarn mineralization 54 Magino Mine 54 Ciresata 54 coincident geochemical 54 Gaoua copper gold 54 Uzboy 54 Eldor Carbonatite 54 Santa Pancha 54 Geologic mapping 54 epithermal deposit 54 Geotechnical drilling 54 CUMO 54 Cannivan Gulch 54 Dublin Gulch 54 excavator trenches 54 Pucamayo 54 surface geochemistry 54 Namoya Summit 54 Moly Brook 54 orogenic gold deposits 54 Vila Nova iron ore 54 polymetalic 54 Lithium Potash 54 Soquem 54 epithermal gold silver 54 Louvicourt 54 Curipamba Project 54 Tres Juanes Norte 54 Constancia copper 54 Simuku 53 trenching mapping 53 Kutcho Project 53 Roughrider uranium 53 Bananghilig 53 Vein Zone 53 Azuero Peninsula 53 Scadding Gold 53 Au Cu 53 Nuevo Milenio 53 kimberlite dyke 53 geochemical anomalies 53 Saucito 53 Drill Hole Results 53 Nkamouna 53 Eskay Creek Silbak Premier 53 kimberlite dykes 53 Cerro Vetas 53 Detailed geological mapping 53 Sleeping Giant Zone 53 bedrock conductors 53 Chiis 53 West Pequop 53 Kurupung 53 Pasacancha 53 geochemically anomalous 53 ultramafic sill 53 Enzyme Leach 53 alteration assemblages 53 Val d'Or Malartic 53 conductive anomalies 53 volcanogenic massive sulphide 53 Ofin river 53 garimpos 53 Drill Targets 53 skarn zones 53 Agua Rica 53 Aranzazu Mine 53 airborne anomalies 53 Michael A. Dawodu 53 Eagle Nest deposit 53 intermediate metavolcanic rocks 53 Croxall Property 53 Baja IOCG 53 Santa Fe Ipora 53 Drilling Commences 53 Cupixi 53 Abitibi greenstone belt 53 REE occurrences 53 drillsites 53 Cerro Moly 53 epithermal gold targets 53 Boomerang massive sulphide 53 Eldor Project 53 Near Surface 53 Prefeasibility Study 53 porphyry Cu Au 53 Luhala 53 Mangazeisky 53 Meliadine West 53 surface geochemical anomalies 53 Cu Mo porphyry 53 massive sulphide VMS 53 grade drill intercepts 53 sheeted quartz 53 La Yesca 53 Salar de Olaroz 53 Ccaccapaqui 53 volcanogenic massive sulfide VMS 53 Las Carolinas 53 Sao Chico 53 Copper Molybdenum 53 downhole geophysics 53 lithium enriched 53 Copper Cobalt 53 magnetite iron mineralization 53 radiometric anomalies 53 copper molybdenum 53 disseminated sulphide mineralization 53 Labrador Trough Nunavik Quebec 53 Kwanika copper gold 53 Aurizona gold 53 Reyna de Oro 53 ultramafic intrusives 53 ODAE 53 Pelusa Property 53 AMEC Americas Limited 53 IOCG deposits 53 mineralizations 53 mineralized skarn 53 Cuiu Cuiu 53 Caracucho 53 Colpayoc 53 chromite occurrences 53 Breccia Zone 53 Gustavson Associates 53 mineralized shear zones 53 silicified breccia 53 Anatacau Wabamisk 53 Invicta Project 53 massive sulphide zones 53 Rare Metal 53 iron ore Arapiraca Project 53 heap leach SX EW 53 electromagnetic conductors 53 Sisson Brook 53 Los Amoles property 53 Campamento Deposit 53 Exploration Drilling 53 Arenal Deeps 52 Ni Cu PGM mineralization 52 Guayabales 52 epithermal gold 52 sulphide zones 52 Cieneguita Project 52 Goldbanks 52 Sourdough Ridge 52 Soil geochemistry 52 Mouchalagane 52 Nemegosenda Project 52 Hoidas Lake 52 Zuun Mod deposit 52 Malrok 52 Represa deposit 52 Kutcho Copper Project 52 Bigrlyi 52 Cobre Grande 52 potentially open pittable 52 geology geochemistry 52 stockwork vein 52 chargeability anomalies 52 mineralized zones intersected 52 Extension Occurrence 52 South Minita 52 sulphide nickel 52 Snowfield Project 52 disseminated sulphide 52 platinum palladium nickel 52 gold porphyry mineralization 52 Hotish 52 potentially mineable 52 Cerro Ccopane 52 hydrocarbon accumulations 52 3D Induced Polarization 52 volcanic stratigraphy 52 Buriti trend 52 Kambalda style 52 Central Mineralised Zone 52 mineralized quartz veins 52 Las Bolas 52 Barre de Fer 52 Bellechasse Timmins 52 lithologic 52 bearing breccias 52 Mistassini property 52 Zone Bambadinka 52 geochemical surveying 52 Emba Derho 52 Cañariaco Norte 52 geophysics trenching 52 Renard cluster 52 prolifically mineralized 52 Minera Afrodita 52 VTEM targets 52 Las Naves 52 Zanzui 52 Sugarloaf Peak 52 prolific Athabasca Basin 52 Gongondy 52 Nyafe 52 airborne radiometric surveys 52 unconformity style 52 Storie Property 52 litho geochemical 52 Goz Creek 52 #,# acre Angilak 52 Huaixi 52 mesothermal gold 52 Stratmat 52 Marban Block 52 mineability 52 IP geophysics 52 Kipawa Deposit 52 basal till 52 gossans 52 drillable prospects 52 SEDEX zinc lead 52 Salar de Diablillos lithium 52 metallurgical flowsheet 52 Hibou dyke 52 geophysical geological 52 Molybdenum Copper 52 Freegold Mountain 52 stratigraphic horizons 52 tungsten mineralization 52 Kobada 52 heap leach operation 52 conductivity anomalies 52 polymetallic vein 52 massive sulphide intersections 52 Pekisko formation 52 Paradox Basin 52 Yanfolila 52 niobium mineralization 52 Frio Sands 52 Mikwam 52 bioleach 52 Taunus gold 52 Pivert Rose property 52 Skarn Zones 52 Banded Iron Formation 52 Assay Results 52 Goliad ISR 52 palaeochannel 52 Quesnel Trough 52 HIV RDEA# 52 Ni Cu PGE 52 Kenwest 52 lithogeochemical 52 Preliminary metallurgical testwork 52 geologically favorable 52 nickel sulphide mineralization 52 footwall sediments 52 Mothae pipe 52 underlying sulfide mineralization 52 soil geochemical sampling 52 Preliminary Scoping Study 52 geological geophysical geochemical 52 Prospector Mountain 52 Shirotnaia zone 52 Starvation Canyon 52 Komahun 52 Roughrider Zone uranium 52 Hushamu 52 Yaramoko 51 Ronguen gold 51 Atikwa Lake property 51 Jiama Project 51 detailed geologic mapping 51 REE Y Zr 51 Sulphide Project 51 Lac Cinquante uranium 51 alunite alteration 51 Xietongmen deposit 51 Selbaie 51 MMI anomalies 51 Galeno copper gold 51 PGM mineralization 51 Frasergold Project 51 granodiorite intrusive 51 mafic intrusions 51 Langmuir Property 51 Kinyambwiga gold 51 Peppler Lake 51 Ntaka Hill 51 Hambok 51 extensional drilling 51 VTEM airborne surveys 51 Cu Au 51 CanBiomine 51 enzyme leach 51 geophysical conductors 51 Boxey Point 51 Salave 51 mineralized veins 51 calc silicate 51 Ulaan Khud North 51 Letitna 51 Airborne Geophysical Survey 51 induced polarization surveys 51 Avion Tabakoto 51 NN Zone 51 Collota 51 Lupoto 51 Gahcho Kue 51 El Arrayan 51 Commences Drilling Program 51 Serrote Deposit 51 Shirotnaia 51 Adi Rassi 51 mineral occurrences 51 Ganes Creek 51 Filo de Oro 51 Sian Praso 51 Wildfire Copper Keel 51 Wasamac 51 Goldpines 51 Dogpaw Lake 51 QDD Lower West 51 unique alkylating agent 51 Canariaco Sur 51 Riviere Dore Copper 51 outcropping vein 51 Kuriskova 51 Geochemical sampling 51 heap leach processing 51 HPM Forgues Property 51 Voigtberg 51 resistivity anomalies 51 geochemical geophysical 51 anomalies coincident 51 Beardmore Geraldton 51 airborne magnetometer 51 Chimiwungo 51 AJM Petroleum Consultants AJM 51 auger drill 51 La Yegua 51 mineralogical studies 51 VMS deposit 51 Cu Zn 51 Ni Cu Pt Pd 51 Dubenski property 51 Bossier shales 51 Kalsaka 51 Frankfield East 51 Nariin Sukhait 51 Mr. Darren Koningen 51 Tassawini 51 Main Homestake 51 geophysical surveying 51 McFaulds Lake Property 51 LS Grande 51 Surface sampling 51 nickel PGM 51 La Zarza 51 geophysical conductor 51 manganese mineralization 51 Attawapiskat diamond 51 Heruga deposit 51 VTEM airborne survey 51 altered felsic 51 Handcamp 51 Marathon PGM Cu 51 Debarwa 51 bulk tonnage disseminated 51 wholly owned Twangiza 51 Lapaska property 51 systematic geochemical sampling 51 Tres Chorreras 51 Kena Gold 51 Tungsten Molybdenum 51 Kangaluwi 51 tailings reprocessing 51 Nyieme 51 geologic modeling 51 Cobre Panama copper 51 Beyondie Project 51 Cu Ni PGE 51 Alternative Scenarios 51 Mtsare Khevi Field 51 Toroparu 51 Detailed mapping 51 drillable targets 51 Au Ag mineralization 51 process flowsheet 51 Letourneur 51 Golouma West 51 sedex 51 IP induced polarization 51 magmatic Ni Cu PGE 51 mapping geochemical sampling 51 Kitongo 51 Los Calatos 51 Airborne geophysics 51 artisanal workings 51 soil geochemical anomalies 51 Altynalmas 51 bearing shear zones 51 Metallurgical Testing 51 Kirazli 51 IP geophysical surveying 51 Lac Rocher 51 lithium brine 51 Croinor gold 51 Lamaque property 51 airborne magnetic survey 51 volcanogenic massive sulphide VMS 51 Ouro Verde Deposit 51 Bellechasse Chaudiere 51 Money Knob 51 Mineralized Zone 51 Ongoing metallurgical 51 Sesmo Sur 51 Lupita Mine 51 Manzako Prospect 51 Lamaque Property 51 massive sulfide mineralization 51 Kirazli gold 50 lithological controls 50 Despinassy 50 Jahodna 50 Holbrook Basin 50 Assessment PEA 50 Estrades 50 Sarfartoq 50 MR# #C 50 aeromagnetic anomalies 50 Koshaj 50 Akkulka block 50 Star Kimberlite 50 scoping prefeasibility 50 Pellivuoma 50 anomalous radiometric 50 airborne electromagnetic anomalies 50 mechanical trenching 50 EM anomalies 50 Barro Alto 50 induced polarization geophysical 50 Tortigny 50 Norlartic 50 Fuwan 50 Mineral Resources Estimate 50 Shaft Zone 50 vanadium mineralization 50 pathfinder elements 50 Miocene reservoir 50 Au Cu mineralization 50 Kay Tanda gold 50 Inspectorate Labs 50 Shootaring Canyon Mill 50 heap leach recoveries 50 Uranium Molybdenum Gold 50 Pre Feasibility 50 Somituri Project 50 Adi Nefas 50 Nephros DSUs 50 Roughrider uranium deposit 50 detailed aeromagnetic survey 50 induced polarization chargeability 50 airborne radiometric anomalies 50 Rio Novo 50 precaution Wiehle 50 Haquira 50 supergene zone 50 Horizontal Loop Electromagnetic 50 Falea 50 Keeno Strike 50 Frigate Captain 50 Breccia Ridge 50 anomalous geochemical 50 Antimony Mountain 50 Minapampa Zone 50 Ni PGE 50 Selwyn Basin 50 untested geophysical 50 Drilling Extends 50 Snowfield Zone 50 geological interpretations 50 backhoe trenching 50 Cassiar Gold Camp 50 Kourouloulou 50 Cobrecon 50 Douay Ouest 50 Kaukua 50 Roughrider East 50 airborne radiometric survey 50 pit heap leach 50 Brucejack 50 Currais Novos 50 Aurizona Main 50 magnetite bearing 50 PGEs 50 Volcanogenic Massive Sulphide VMS 50 Bisha Main 50 Pasto Bueno 50 Quifa #X 50 Clay Howells 50 BLEG 50 pit mineable 50 Huxter Lane 50 VTEM geophysical 50 Azulcocha 50 prospective stratigraphy 50 Lac Herbin mine 50 Nevgold 50 Renard Diamond 50 Passendro 50 Mayaniquel project 50 Goldstorm 50 SRK Consultants 50 geological modeling 50 mapping geochemistry 50 Goldwedge 50 Prefeasibility 50 Paredones Amarillos 50 existing wellbores 50 Encino Vein 50 Otish 50 #WR# 50 mineralized pegmatite 50 Imwauna Project 50 volcanogenic massive sulphides 50 Kerr Sulphurets 50 Vanadium Titanium Iron 50 Molejon Gold Project 50 Halfmile 50 epithermal alteration 50 Agbaou 50 Arista deposit 50 Borosi 50 stream sediment geochemistry 50 Otjikoto 50 Ni Cu PGE mineralization 50 Mindoro porphyry copper 50 ultramafic intrusions 50 % owned Molejon 50 Inlice 50 calcrete sampling 50 Highbank Lake 50 Aurizona 50 spodumene pegmatite 50 Agata Nickel Project 50 Lemarchant prospect 50 Malartic Lakeshore property 50 Ronguen Gold Deposit 50 Dioulafoundou 50 Javhlant license 50 NorthMet Project 50 resistivity surveying 50 resolution airborne magnetic 50 Otjikoto gold 50 Larder Lake Property 50 hydrometallurgical processing 50 oxide heap leach 50 Schaft Creek deposit 50 arsenic anomalies 50 unconformity type 50 Eastford Lake 50 Kwanika 50 anomalous chargeability 50 Veta Norte 50 Yalea deposit 50 induced polarization geophysical surveys 50 South Barnat deposit 50 ZYBRESTAT fosbretabulin 50 induced polarization anomalies 49 Enzyme Leach soil 49 Greenstone belt 49 Announces Assay Results 49 Cuatro Hermanos 49 Kabanga nickel 49 Kigosi 49 intrusives 49 Gibson Gulch 49 Notikewin 49 Onkelo 49 Paredones Amarillos gold 49 Megatem 49 Lotshi Block 49 soil geochemistry 49 Oral NKTR 49 Ni Cu 49 drillcore 49 Kimberlites 49 QLT Plug Delivery 49 soil geochemical survey 49 holes #WR# 49 geochem anomalies 49 Whiskey Gap 49 mineralized showings 49 gravity geophysical surveys 49 Fobiri 49 Nicholas Denys 49 Don Sixto 49 Wachigabau 49 CIM compliant 49 Nunavik Nickel 49 soil geochemical surveys 49 Adumbi Prospect 49 mineable resource 49 Mineralized Corridor 49 geological reconnaissance 49 ANIT 49 geology geophysics 49 Bankable Feasibility Study BFS 49 Mistassini 49 rhyolite domes 49 Etango deposit 49 Kavola East 49 stepout drilling 49 geophysical interpretations 49 Zn Pb 49 Kul Bas block 49 Avoid jalapenos 49 Lac Pelletier 49 3D induced polarization 49 Igunda 49 quartz vein zones 49 petrographic studies 49 Puella Bay 49 Montney Fairway 49 Drilling Continues 49 Klappibacken 49 airborne magnetic anomalies 49 stratigraphic interval 49 MAX molybdenum 49 Oshiveli 49 Dubenski 49 Nambala iron deposit 49 Kun Manie 49 epithermal bonanza 49 assessment PEA 49 #-# compliant mineral 49 Suurikuusikko 49 REE deposit 49 Porcupine Destor 49 T'Boli gold silver 49 Bonasika Mining Licence 49 multiple stratigraphic horizons 49 large tonnage proximal 49 nickel sulphide 49 metallogenic 49 Beruang Kanan 49 exhalite 49 Beardmore Geraldton greenstone belt 49 Lalor deposit 49 Palito mine 49 Kahuna kimberlite 49 Zheng Guang gold 49 Micrex 49 BRPM 49 Teapot Granite 49 lithology 49 Lower Acacus Formation 49 Morelos Sur 49 Mineral Belt CMB 49 Tejamen 49 Kutcho Creek 49 extensive artisanal workings 49 prospecting geological mapping 49 Wardrop Engineering Inc. 49 favorable stratigraphy 49 Foisey Larson 49 Massive Sulphide 49 Upper Oligocene 49 Lac Herbin 49 Gold IOCG 49 geophysical surveys trenching