Related by context. All words. (Click for frequent words.) 75 diamond drillholes 74 aircore holes 73 infill diamond 72 NQ diamond 72 delineation drill 72 aircore drilling 71 Reverse Circulation RC 71 hole MWNE 71 NQ diamond drill 71 Tantamaco 71 excavator trenching 70 Kau# 70 Ntaka Hill 70 NQ diamond drilling 70 Reverse Circulation 70 Kavola East 69 RC drillholes 69 holes #WR# 69 drillholes 69 meters downhole depth 69 #WR# 69 adit sampling 69 hole NR# 68 aircore 68 Marban deposit 68 drillhole spacing 68 aircore drill 68 Angela Vein 68 soil geochemical survey 68 holes RR# 68 Forestel Zone 68 Reverse Circulation drilling 68 Diamond Drill Holes 68 Santa Pancha 68 geological mapping trenching 68 #m@#.#g t Au [003] 68 Takom Zone 68 aircore drill holes 68 infill drillholes 68 Snowfield Zone 68 Onkelo 67 excavator trenches 67 mineralized zones intersected 67 RAB drilling 67 coreholes 67 Timmins Porcupine West 67 auger drilling 67 Ouro Verde Deposit 67 Zafranal 67 infill holes 67 Dubenski property 67 M'Phatlele 67 Roughrider East 67 hole HR# 67 NQ diameter 67 Anuri kimberlite 67 surface trenching 67 infill drill 67 Dioulafoundou 67 Tres Juanes Norte 67 #CBN 67 geochemical soil 67 Nueva Concepcion 67 Reverse Circulation drill 67 square kilometer Chidliak 67 extensional drilling 67 Pokukrom West 67 Valle Hondo 67 mechanized auger 67 Tortigny 67 Pucamayo 67 Marban Block 67 m@#.# g t [003] 67 Chiis 67 Geophysical surveys 67 drill hole SADD# 67 Butia prospect 67 Bellechasse Timmins 66 intersected sulphide mineralization 66 Bellekeno 66 QAP DDH 66 #m@#.#g t Au [004] 66 averaging #.#g t [001] 66 Dombraly 66 Kenwest 66 Fobiri 66 GG6 66 Vindaloo zone 66 holes intersected mineralization 66 Nueva Caledonia 66 Planchas de Plata 66 El Cometa 66 Nfante East 66 Cumpie Hill 66 Tres Juanes 66 Breccia Ridge Zone 66 Fayolle Project 66 Juanicipio Vein 66 reverse circulation 66 @ #.#g t [002] 66 Aircore drilling 66 hole WAT# 66 meters@#.# g t [002] 66 net Cardium horizontal 66 underground delineation drilling 66 ground geophysical surveying 66 metres@#.# % [002] 66 #m@#.# g t Au [002] 66 Gongondy 66 Dubenski Shaft Zone 66 intersected mineralized 66 Viking horizontal wells 66 Encino Vein 66 Minapampa Zone 66 Infill Drilling 66 dipole dipole IP 66 stratigraphically below 66 RC percussion 66 Simuku 66 Malrok 66 #-# compliant mineral 66 grading #.#g t [002] 66 MPD# 66 Naciente Quebrada Pedregosa 66 El Compas 66 Bajo Negro vein 66 metres@#.#g t gold 66 Wasamac property 66 induced polarization anomalies 65 metres@#.# g t Au [003] 65 Colnic 65 mineralized skarn 65 downdip extension 65 Haquira Project 65 Ground geophysical surveys 65 #m@#.#g t gold [001] 65 Riscos de Oro 65 airborne geophysical anomalies 65 induced polarization geophysical surveys 65 kimberlite outcrop 65 resource delineation drilling 65 downhole depth 65 Penasco Quemado 65 hole RC# 65 Lone Pine Property 65 Dadiangou 65 SLD# 65 #m@#.# g t [002] 65 prospecting trenching 65 El Quevar project 65 SMI LX 65 Marge Vein 65 kimberlite float 65 Deerhorn Zone 65 metres@#.# g t [003] 65 bearing sulphide mineralization 65 #m@#.# % [004] 65 #m@#.# g t Au [003] 65 Segala deposit 65 updated NI# 65 #m@#.#g t Au [001] 65 #m@#.#g t gold [002] 65 El Orito vein 65 geochemical surveying 65 Calandria Sur 65 Drill Hole Results 65 #.#g t silver [003] 65 Early Joli Fou 65 Sesmo Sur 65 intersected kimberlite 65 intersected anomalous radioactivity 65 drill hole MWNE 65 #m@#.# g t Au [001] 65 mapping trenching 65 #m@#.# % [003] 65 Buriti trend 65 Kenge Target 65 Marta Este 65 Adumbi Prospect 65 South Minita 65 3PGE + Au 65 meter spacing 65 Significant intersections 65 outcrop sampling 65 distinct substructures 65 VTEM surveys 65 PdA Extension 65 Reverse circulation 65 AZS# 65 geological mapping prospecting 65 Pokukrom East 65 Cerro la Paila 65 geological mapping sampling 65 Drill Holes 65 Somituri Project 64 diamond drillhole 64 Nyota Prospect 64 Aguila Cu Mo 64 Hotish 64 auriferous zones 64 stepout drilling 64 Bejucosa 64 La Mascota zone 64 Drilling Extends 64 RC drilling 64 Preliminary metallurgical testwork 64 Geological mapping 64 Diamond Drill 64 Minapampa 64 Kiena mine 64 Hole EC# 64 Ngayu 64 Muirs Reef 64 IP chargeability anomalies 64 Nakru 64 NE Wollaston 64 RC drill 64 + Y#O# 64 Calandria Norte 64 Manfo Property 64 #m@#.# g t [004] 64 diamond drill 64 Messenger Formation 64 Perestroika Prospect 64 Tumpangpitu 64 approximately #km# [001] 64 Greenschist Zone 64 grading #.#g t [001] 64 Bajo Negro 64 Handcamp 64 intercept grading 64 Tanjianshan 64 Langmuir Nickel Discovery 64 reconnaissance prospecting 64 detailed geologic mapping 64 Au Cu mineralization 64 drill holes 64 Yaramoko 64 microdiamonds 64 UG2 Chromitite Layer 64 Gramalote Ridge 64 Assay Results 64 IP Resistivity survey 64 #m@#.#g t Au [005] 64 g t PGM 64 m@#.# g t Au [002] 64 #m@#.# % [006] 64 Brucejack Project 64 Rateria property 64 Drilling Encounters 64 ft. perf 64 itabirite 64 OTD# 64 BRAZD 64 Yaxtche deposit 64 Ayelen Vein 64 holes #RB# 64 Significant intercepts 64 Rare Earth Element REE 64 DDH# [002] 64 Kay Tanda 64 Klappibacken 64 Homestake Silver 64 mineralized outcrops 64 NEVADO 64 DDH# [001] 64 Zuun Mod molybdenum 64 #.#gpt [001] 64 Despoblados 64 coincident induced polarization 64 #TR# 64 Coneto 64 Mouchalagane 64 Kenge target 64 systematic geochemical sampling 64 kilometer 2D seismic 64 Clay Howells 64 Atikwa Lake property 64 kimberlitic bodies 64 Ciresata deposit 64 coincident geophysical 64 Cobrecon 64 prospecting geological mapping 64 Klaza property 64 Bellekeno deposit 64 Zuun Mod 64 Takom 64 auger drill 64 VVGD 63 massive sulphide intersections 63 WDD# 63 mineralized diatreme breccia 63 diamond drilling 63 ZK# [002] 63 Shirotnaia 63 #.#g t gold [005] 63 sulphide breccia 63 holes RL# 63 trenching sampling 63 Mankarga 5 63 Cassiar Moly property 63 Batero Quinchia 63 IP geophysical surveying 63 Airborne geophysical surveys 63 ground magnetics 63 #RB# 63 hole NC# 63 sampling trenching 63 Bombore 63 airborne geophysical surveying 63 bulldozer trenching 63 GPD# 63 LC#C 63 Huarabagoo 63 geophysical surveying 63 WDC# 63 airborne radiometric survey 63 Cerro Pelon 63 Azulitas 63 section #E [004] 63 geophysical surveys trenching 63 prospecting mapping 63 delineation wells 63 holes BR# 63 Alaskite 63 Las Boquillas 63 #m@#.#g t Au [006] 63 holes MM# 63 Thor Trend 63 Lac Pivert Rose 63 Filo de Oro 63 Metre Drill Program 63 auger sampling 63 #JD# 63 ft. TDD 63 #.#Mlb [001] 63 kimberlitic material 63 Oshiveli 63 Bokan Dotson Ridge 63 ZFDDH# 63 Au CHL# 63 Mankarga 63 La Bodega zone 63 VTEM airborne survey 63 Hache lens 63 Tortigny deposit 63 Meliadine West 63 ground geophysics trenching 63 meters grading #.#g [001] 63 reconnaissance mapping 63 vein outcrops 63 Roughrider uranium deposit 63 Vargbacken 63 Kena Property 63 anomalous zones 63 Sleeping Giant Zone 63 CSAMT geophysical survey 63 intersected anomalous 63 fracture stimulation stages 63 Drillholes 63 induced polarization survey 63 sulphide intersections 63 hole BC# 63 WAT# 63 VTEM airborne surveys 63 Luiri Hill 63 mechanized trenching 63 Mineralized intervals 63 #m@#.#g t [001] 63 Brimstone leach pad 63 strikelength 63 DDH IAX 63 Drill intersections 63 Kuriskova 63 Inmaculada Project 63 #ppm Mo 63 Nose Deposit 63 spaced drill 63 Frio Sands 63 aeromagnetic survey 63 airborne magnetic survey 63 VTEM targets 63 FNX# 63 Nukhul formation 63 Cu Ni 63 geochemical geophysical 63 geological mapping geochemistry 63 Ciresata Porphyry 63 IP geophysical surveys 63 hole ZFDDH# 63 TRK# 63 Zam Zam Shenkman 63 #.#gpt [002] 63 surface geochemical sampling 63 geochemical samples 63 Drilling Intersects 63 Rojo Grande 63 Sicera Sur 63 Cata Clavo 63 KERC# 63 Segala Main 63 Klaza Zone 63 drill hole HR# 63 geological reconnaissance 63 Bellechasse Timmins deposit 62 hole GF# 62 Snowfield Project 62 #m@#.#g t Au [002] 62 IP geophysical anomaly 62 basal till 62 KBDD# 62 Cretaceous Jurassic 62 meterage 62 Scadding Gold 62 Igunda 62 Emba Derho 62 alaskite 62 Cardium wells 62 Strike Length 62 MC Dalhousie 62 Real Viejo 62 NQ drill 62 Antimony Mountain 62 EM anomalies 62 Yenac 62 interval grading #.#g 62 Tagpura 62 Quebrada Verde 62 Inferred Resource estimate 62 airborne geophysics 62 gravity geophysical surveys 62 #m@#.# g t [006] 62 DDH CF# 62 open pitable 62 hole LA# 62 trench sampling 62 #.#g t Ag [005] 62 Significant assay 62 Koshaj Deposit 62 intrusive breccia 62 Dienemera 62 EM geophysical survey 62 Jumping Josephine 62 mineralized pegmatite 62 ZTEM survey 62 Letitna 62 Silica Ridge 62 #m downhole 62 #.#g t gold [001] 62 Skukum Creek 62 NQ diameter core 62 #m@#.#g t [003] 62 @ #.#g t [004] 62 DH7 Frankfurt 62 Delineation drilling 62 intersected #.#m [002] 62 magnetometer survey 62 Aricheng West 62 Pilanesberg Project 62 gold geochemical anomalies 62 Letourneur 62 Lac Herbin mine 62 bearing breccias 62 El Domo deposit 62 Pasacancha Hole 62 geological mapping geochemical 62 backhoe trenching 62 Arap Tepe 62 kilometer airborne magnetic 62 mineralized outcrop 62 Pampacancha 62 stepout 62 Cu Au mineralization 62 interval assaying 62 #m@#.#g t [006] 62 Pan de Azucar 62 DDHs 62 IP geophysical anomalies 62 ground geophysical surveys 62 maiden JORC resource 62 Debarwa deposit 62 hole FL# 62 holes WAT# 62 Renard cluster 62 Expands Mineralization 62 Ashram Rare Earth 62 La Cantera prospect 62 produce #,#-#,# ounces 62 Ormsby Zone 62 Montney horizontal wells 62 #m@#.# g t Au [006] 62 stockwork breccia 62 Ground geophysics 62 averaging #.#g t [002] 62 drill hole RMZ# 62 holes DDH 62 BCGE# 62 Metres Averaging 62 Godah # 62 Ciresata 62 True Width 62 Gramalote 62 JORC Code compliant 62 El Compas vein 62 % TCu 62 electromagnetic conductors 62 #m@#.#g t [002] 62 mapping geochemical sampling 62 Louvicourt 62 infill RC 62 Canamerica 62 Singida Londoni gold 62 Tatajuba 62 #.#m grading #.#g [001] 62 delineation drilling 62 Kangaluwi 62 #m@#.#g t [004] 62 Brucejack 62 Skarn Zone 62 geostatistical analysis 62 #m@#.# % [001] 62 #.#g t Ag [004] 62 #.#g t Au [004] 62 Extension Occurrence 62 Lac Herbin 62 detailed aeromagnetic survey 62 -Expandable Memory 62 infill drilling 62 coincident magnetic 62 ppm eU#O# 62 approximately #km# [002] 62 trenches excavated 62 LONG Bars 62 Malartic Lakeshore property 62 Zn Cu Ag 62 Tuligtic 62 geophysical conductors 62 Puella Bay 62 Geochemical sampling 62 ppm Pb 62 CANALASKA URANIUM LTD 62 Nabeba 62 g t Beryllium 62 mapping prospecting 62 Guayuyaco Block 62 Gold Per Tonne 62 Schefferville Gold 62 Hugla Tepe 62 Kakanda Project 62 drilled vertically 62 Cobre Grande 62 soil geochemistry anomaly 62 Mongora 62 Fry Inlet 62 CIM compliant 61 mechanical trenching 61 Kena Gold 61 Lemarchant Prospect 61 hole SP# 61 Singida Londoni Gold 61 Bisha Main 61 Itigi Manyoni Uranium 61 Promontorio 61 mineralized breccia 61 surface outcrops 61 Junnagunna 61 kimberlite dykes 61 Kelex 61 drilled thicknesses 61 Medrizien 61 soil geochemical sampling 61 appraisal sidetrack 61 Djambaye 2 61 #,# ft. perf 61 holes BD# 61 mineralized intercepts 61 drillhole intersected 61 ppm Ag 61 IP geophysics 61 intersected massive sulphides 61 VTEM survey 61 soil geochemical 61 Triassic reservoirs 61 geochemical sampling 61 Guatiquia 61 mineralized intercept 61 Belleterre mine 61 Detailed geological mapping 61 AngloGold Ashanti Titiribi 61 underground adits 61 Adi Nefas 61 km induced polarization 61 Barkerville Mountain 61 Pinguino property 61 Bedard Dyke 61 Meter Drill 61 Mala Noche Footwall Zone 61 magnetite BIF 61 magnetometer surveying 61 Carotare 61 infill sampling 61 Ouro Verde deposit 61 #.#g t Au [002] 61 #.#gpt gold [001] 61 REE mineralized 61 La Yaqui 61 metres@#.# % [003] 61 Surface sampling 61 Accha deposit 61 mineralized lenses 61 Yaxtché deposit 61 Magusi deposit 61 Njame 61 hole BR# 61 radon anomalies 61 airborne geophysical surveys 61 Poste Lemoyne Extension 61 Cardium horizontal wells 61 hole MJV 61 Kitenge Prospect 61 South Barnat 61 outcropping quartz veins 61 Pasacancha Ag Au 61 mineralizations 61 Troymet 61 Valdecanas Vein 61 Mineralized intercepts 61 Heruga Deposit 61 East Acma 61 gAu t 61 El Orito 61 hole DDH# 61 hole DH# 61 Bornite 61 BB# [002] 61 Bogoso Sulfide Expansion 61 JORC resource estimate 61 Arta # 61 Lamaque Property 61 #ppb Au [002] 61 TiTac 61 Bonanza Ledge Zone 61 Taunus pit 61 Silverjack 61 metres@#.# g t Au [002] 61 RRZE 61 horizontal lateral 61 Regcourt 61 Maybrun 61 Bulk sampling 61 hole TL# 61 km 2D seismic 61 Sunbeam Pettigrew property 61 resource delineation 61 LJ#r 61 Hole RR# 61 owned Pumpkin Hollow 61 TSX VENTURE PUM 61 #COM# 61 TSX VENTURE RBE 61 mineralization encountered 61 #.#m [003] 61 Sinchao Property 61 EM conductors 61 stream sediment geochemical 61 Gwabe 61 intersecting mineralization 61 #m@#.# g t Au [007] 61 hole WAT# #A 61 Eagle Nest deposit 61 #.#g t [004] 61 sulfidation style 61 airborne radiometric 61 Sambaru 61 Hushamu 61 section #N [002] 61 hole #WR# 61 magnetometer surveys 61 NQ core 61 GRD# 61 DUB# 61 magmatic kimberlite 61 TerraX 61 Avion Tabakoto 61 geologically mapped 61 Hole WAT# 61 reconnaissance geological mapping 61 EVx 61 TWDDH 61 conductive zones 61 Yanfolila 61 rockchip 61 IP geophysical 61 Fold Nose 61 Montney horizontal 61 Selodong 61 Eastmain Mine 61 talus fines 61 trenching mapping 61 AeroTEM III 61 Chimiwungo 61 IP resistivity 61 airborne electromagnetic 61 Gossan Hill 61 Starter Pit 61 HG Sulphide zone 61 potentially bulk mineable 61 meters grading #.#g [002] 61 Airborne geophysics 61 Reverse Circulation Drilling 61 Induced Polarization surveys 61 Asmara Project 61 Tiriganiaq deposit 61 Banded Iron Formation 61 mineralized showings 61 Silverstreams 61 Whabouchi 61 Explor Resources 61 intersected variably 61 Rio Ariari Block 61 inferred resource calculation 61 Alaskite Zone 61 Yaxtche zone 61 Capoose 61 hole NAD# 61 hole LL# 61 Guayabito 61 Stockwork 61 breccia mineralization 61 grading #.#g t Au [002] 61 Bambadinka trend 61 Dargues 61 Detailed mapping 61 Uzboy 61 Geologic mapping 61 soil geochemical anomalies 61 #.# gpt silver 61 borehole geophysics 61 mineralized shear zones 61 stope preparation 61 horizontal wellbore 61 #.#g t silver [004] 61 soil geochemistry sampling 61 IP induced polarization 61 Big Hurrah 61 calcrete sampling 61 Cheowa 61 stratigraphic wells 61 #.#g Au t [003] 61 Montney wells 61 Barsele 61 SADD# 61 Hole BL# 61 Kospi vein 61 Chiis deposit 61 mineralized stratigraphy 61 geochemical assay 61 intersected sulphide 61 g t Au eq 61 Bracemac Zone 61 drill hole NAD# 61 Recompensa vein 61 Guayabales 61 VTEM geophysical survey 61 Cheal B3 61 Handeni Gold Trend 61 Heruga deposit 61 Tulks South 61 Wolffork 61 microdiamond results 61 Eastford Lake 61 Calvario Vein 61 #g t Au [001] 61 Jahodna 61 Mt Penck 61 Casa Berardi Mine 61 linecutting 61 Marban Block property 61 Muiane 61 Kwanika 61 Section #E [003] 61 mineralized gabbro 61 Quebradona 61 Sissingue 60 previously unsampled 60 updated Mineral Resource 60 airborne magnetometer survey 60 Bir Moghrein 60 Harrier Underground 60 stringer sulphides 60 Mato Velho 60 Definition Drilling 60 Shining Tree Gold 60 soil geochemical surveys 60 Lupoto 60 Grams Per Tonne 60 Batero 60 Eaglehead Property 60 VTEM anomalies 60 Colossus COOMIGASP joint venture 60 corehole 60 hole GTD 60 Soil sampling 60 Footwall Zone 60 magnetite ilmenite lenses 60 Konkera 60 Reyna de Oro 60 Y Zr 60 Metallurgical Testing 60 Diamond Drill Hole 60 Iron Titanium Vanadium 60 Tiriganiaq 60 #Moz 60 West Pequop 60 Javhlant license 60 induced polarization geophysics 60 DDH #B 60 Skukum 60 Cerro de Oro 60 m@#.# g t [004] 60 Frio wells 60 hole FC# 60 ppm cobalt 60 Paboase South 60 Lower Goru 60 Coldstream Property 60 Guadalupe Manto 60 Lac Levac 60 Cozamin 60 section #E [003] 60 surface geochemistry 60 radiometric surveys 60 Big Daddy Chromite 60 sulfide bearing 60 hole RR# 60 Holpan Klipdam 60 GCL# 60 owned Uzboy Project 60 Kinyambwiga 60 m/# 60 Mt@#.# g t Au [001] 60 anomalous soil geochemistry 60 Drill Program 60 Koshaj 60 DEBD 60 drillhole 60 gossans 60 footwall zones 60 Merensky Reef 60 drilled horizontally 60 Orogrande Shear Zone 60 magnetic geophysical surveys 60 variably mineralized 60 vein assayed 60 geophysics prospecting 60 NSGold 60 Ikungu 60 Infill drilling 60 Otish Uranium 60 Geophysical Survey 60 Ogama Rockland 60 airborne EM 60 Itilima 60 Drill hole SADD# 60 Announces Assay Results 60 IP resistivity survey 60 Hallnor 60 ST1 Zone 60 airborne anomalies 60 #ppm molybdenum [001] 60 sidetrack appraisal 60 Cardium horizontal 60 grade drill intercepts 60 Sisson Brook 60 Porphyry Pearl 60 Chu Molybdenum 60 geochemically anomalous 60 # KBDD# 60 Cardium formation 60 Tarachi 60 Pozo Seco 60 Curipamba 60 Singida Gold Project 60 Pimenta Bueno 60 airborne VTEM 60 Cu Zn Ag 60 Zafranal copper 60 induced polarization IP 60 Bellekeno Mine 60 Leprechaun Pond 60 JORC Inferred Resource 60 #.#gpt [004] 60 Wytowno # 1 60 Beluga sapphire property 60 massive sulphide VMS 60 El Creston molybdenum 60 Agua Branca 60 airborne electromagnetic survey 60 Leprechaun Deposit 60 Mirzaani # 60 Puajanca Zone 60 Ag Eq 60 Mineral Resource Statement 60 Cuiu Cuiu 60 garimpeiro workings 60 ESO Uranium 60 inferred tonnes grading 60 Moz Au 60 carat gem quality 60 alluvial gravels 60 ppm indium 60 Preliminary metallurgical 60 Exploration Drilling 60 Norpax 60 intersected disseminated 60 geochemical assays 60 Tungsten Molybdenum 60 sub Athabasca unconformity 60 Li# 60 peaks Batian 60 Dunrobin deposits 60 induced polarization 60 Mbenge Zone 60 sylvinite 60 Pitarrilla 60 silicified breccia 60 ESI# 60 Allammaq 60 Guajes West 60 Ketza River 60 near Wabowden Manitoba 60 Timan Pechora Project 60 Toroparu 60 Croinor 60 Nyafe 60 Golouma South 60 Nkout 60 @ #.#g t [001] 60 Norlartic 60 KBRC# 60 soil geochemical anomaly 60 JORC compliant inferred resource 60 spodumene bearing 60 successfully fracture stimulated 60 HLEM 60 Detour Gold Detour 60 Airborne Geophysical Survey 60 #ppm U 60 Dogpaw No. 60 Amun Deeps 60 Akasaba Mine 60 Soil Anomaly 60 Rodilla Manto 60 ground geophysics 60 Stepout 60 anomalies coincident 60 Ni Cu PGM mineralization 60 Sulphide mineralization 60 Goldpines North 60 Kobada Mali 60 Damoti Lake Gold 60 #km 2D seismic 60 Okohongo 60 Zone Bambadinka 60 Lang Exploratory Drilling 60 Yanque 60 Flin Flon Greenstone Belt 60 Infill Drilling Program 60 hole #VK 60 magnetite gneiss 60 mineralized intrusive 60 geologic modeling 60 Ida Dome 60 induced polarization geophysical 60 EMX NEM 60 Siribaya mega structure 60 True thicknesses 60 Drilling Intercepts 60 Solotomo 60 Amaruk property 60 diamondiferous kimberlite pipes 60 1g t Au 60 Hole ZFDDH# 60 Brecha Limite 60 YAR# 60 Emba Derho deposit 60 Culebrilla 60 REE showings 60 MGZD# [001] 60 East Arta # 60 #.#gpt gold [002] 60 hole #GSE# 60 Mineralized Zone 60 intersected mineralization 60 massive sulphide zones 60 intersected massive sulphide 60 Muskox kimberlite 60 Rovina Porphyry 60 Zinc Mineralization