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(Click for frequent words.) 80 airborne magnetic 79 airborne geophysics 79 airborne radiometric 79 geophysical survey 78 airborne EM 78 VTEM 77 airborne geophysical survey 77 VTEM survey 77 airborne geophysical surveys 77 aeromagnetic survey 77 airborne magnetic survey 77 airborne radiometric survey 77 geophysical surveys 76 aeromagnetic 76 geophysical 75 magnetometer survey 75 airborne magnetics 75 aeromagnetic data 75 magnetic geophysical 75 radiometric surveys 75 geochemical 75 magnetic electromagnetic 74 geophysical interpretation 74 VTEM surveys 74 induced polarization IP 74 soil geochemical 74 ground magnetics 74 radiometrics 74 airborne geophysical anomalies 74 radiometric survey 74 VTEM airborne survey 73 ZTEM 73 CSAMT 73 airborne VTEM survey 73 geochemical surveys 73 radiometric 73 lithogeochemical 73 induced polarization survey 73 soil geochemistry 73 ground geophysical surveys 73 Induced Polarization IP 72 airborne electromagnetic 72 soil geochemical survey 72 geophysical geochemical 72 IP geophysical 72 AeroTEM III 72 resistivity surveys 72 Geophysical surveys 71 Geotech Ltd. 71 induced polarization 71 geological reconnaissance 71 stream sediment 71 Detailed mapping 71 airborne VTEM 71 soil geochemical surveys 71 Geological mapping 71 airborne electro magnetic 71 mapping prospecting 71 IP geophysical surveys 71 ZTEM survey 71 geological mapping 71 IP induced polarization 70 geophysical targets 70 MEGATEM survey 70 geochemical sampling 70 HLEM 70 surface trenching 70 outcrop sampling 70 airborne geophysical surveying 70 IP Resistivity survey 70 soil geochemical sampling 70 resolution airborne magnetic 70 ground geophysics 70 ground geophysical surveying 70 airborne electromagnetic survey 70 radiometric anomalies 70 geophysical anomalies 70 coincident magnetic 70 detailed airborne magnetic 70 aeromagnetic surveys 70 Megatem 70 prospecting mapping 70 airborne radiometrics 69 enzyme leach 69 DEEPEM 69 Induced Polarization 69 geophysical surveying 69 geological mapping prospecting 69 EM geophysical survey 69 aeromagnetics 69 geochemical anomalies 69 IP resistivity 69 geochemical soil 69 magnetometric 69 TDEM 69 Geotech VTEM 69 UTEM 69 detailed geologic mapping 69 magnetic radiometric 69 airborne anomalies 69 EM anomalies 69 diamond drilling 69 Induced Polarisation IP 69 geochemical surveying 69 geochem 69 VTEM anomalies 69 anomalous radiometric 69 detailed aeromagnetic survey 69 conductive zones 69 kilometer airborne magnetic 69 airborne radiometric anomalies 69 induced polarization surveys 69 IP geophysics 68 airborne electromagnetic EM 68 IP Induced Polarization 68 geochemical geophysical 68 electromagnetic EM survey 68 airborne radiometric magnetic 68 Ground geophysics 68 magnetometer surveys 68 electromagnetic conductors 68 geological modeling 68 geologic mapping 68 Airborne geophysics 68 VTEM airborne 68 airborne magnetic anomalies 68 EM conductors 68 reconnaissance prospecting 68 electromagnetic surveys 68 airborne EM survey 68 Ground geophysical surveys 68 RC drilling 68 detailed geological mapping 68 borehole geophysical 68 magnetic anomalies 68 IP Resistivity 68 electromagnetic geophysical survey 68 induced polarization anomalies 68 induced polarization geophysical 67 surface geochemical sampling 67 InfiniTEM survey 67 VTEM airborne geophysical 67 auger drill 67 MegaTEM 67 mineralized skarn 67 petrographic studies 67 VTEM geophysical 67 stream sediment geochemical 67 resolution aeromagnetic survey 67 electromagnetic geophysical 67 radiometric magnetic 67 auger drilling 67 3D Induced Polarization 67 helicopter borne VTEM 67 Detailed geological mapping 67 coincident geophysical 67 geological geochemical 67 surface outcrops 67 Soil sampling 67 mapping trenching 67 Z TEM 66 Radiometric surveys 66 3D induced polarization 66 airborne magnetometer survey 66 2D seismic survey 66 2D seismic data 66 anomalous zones 66 radiometric surveying 66 geophysics prospecting 66 conductive anomalies 66 excavator trenching 66 termite mound sampling 66 Geologic mapping 66 Geophysical surveying 66 Abitibi Geophysics 66 mineralized outcrops 66 km 2D seismic 66 Quantec Geoscience 66 VTEM targets 66 surface geochemistry 66 Radiometric 66 gamma ray spectrometry 66 infill sampling 66 trench sampling 66 MMI soil geochemical 66 Geophysical Survey 66 airborne magnetic radiometric 66 drillholes 66 diamond drill 66 IP chargeability anomalies 66 AeroTEM II 65 induced polarization geophysics 65 Induced Polarisation 65 Abitibi Geophysique 65 VTEM conductors 65 dipole dipole IP 65 geological interpretations 65 2D seismic 65 magnetic geophysical surveys 65 AeroTEM survey 65 Induced Polarization geophysical 65 Itigi Manyoni Uranium 65 MEGATEM 65 reconnaissance mapping 65 magnetic anomaly 65 mapping geochemical sampling 65 anomalous geochemical 65 airborne magnetic surveys 65 VLF EM survey 65 epithermal vein 65 aircore drilling 65 gradient array 65 Geochemical sampling 65 radiometric anomaly 65 geophysical geological 65 Fugro Airborne Surveys 65 Ruhuhu 65 XDS VLF EM 65 aircore 65 AeroTEM 65 Sicera Sur 65 airborne magnetic electromagnetic 65 radiometric airborne 65 detailed airborne geophysical 64 drillhole 64 VTEM Survey 64 RC drill 64 geological interpretation 64 drill holes 64 geophysical datasets 64 soil sampling 64 BLEG 64 gravity geophysical surveys 64 electro magnetic EM 64 Quantec Titan 64 metallogenic 64 resolution aeromagnetic 64 CSAMT geophysical survey 64 soil anomalies 64 Yanfolila 64 mineralized zones intersected 64 aeromagnetic anomalies 64 resistivity anomalies 64 infill drill 64 Terraquest 64 geological mapping trenching 64 Black Thor chromite 64 Terraquest Ltd. 64 Geotech Ltd 64 geophysical conductors 64 Shaft Zone 64 Airborne EM 64 IP chargeability 64 IP resistivity survey 64 magnetometry 64 Horizontal Loop Electromagnetic 64 RAB drilling 64 soil geochemical anomalies 64 scintillometer survey 64 mineralized drill intercepts 64 Cobrecon 64 Airborne Survey 64 prospecting trenching 64 geological mapping geochemistry 64 element geochemistry 64 Mag EM 64 geochemical analyzes 64 TDEM survey 64 Soil geochemical 64 VTEM geophysical survey 64 mineralized zones 63 kimberlitic 63 induced polarization resistivity 63 3D seismic 63 CSAMT survey 63 geochemical samples 63 auriferous 63 Soil geochemistry 63 KIMs 63 Banded Iron Formation 63 linecutting 63 Quantec 63 aero magnetic 63 pole dipole 63 previously undrilled 63 Fofina 63 surface geochemical anomalies 63 MEGATEM II 63 Lone Pine Property 63 gold anomalism 63 IP geophysical surveying 63 radiometric geophysical survey 63 Bajo Negro 63 VLF surveys 63 mechanized trenching 63 electromagnetic anomalies 63 Sesmo Sur 63 palaeochannel 63 calcrete sampling 63 downhole geophysical 63 airborne EM surveys 63 geochem anomalies 63 auger geochemical 63 EM conductor 63 Electromagnetic EM 63 trenching sampling 63 Dubenski 63 airborne magnetometer 63 gossan 63 Preliminary metallurgical 63 Surface sampling 63 mechanical trenching 63 magnetite mineralization 63 geophysics trenching 63 borehole EM 63 adit sampling 63 prospecting geological mapping 63 Time Domain Electromagnetic 63 Cu Au mineralization 63 Induced Polarization Resistivity 63 Guayabales 63 mineralized occurrences 63 Induced polarization 63 Klaza property 63 #km 2D seismic 63 MegaTEM II 63 electromagnetic surveying 63 massive sulphide lens 63 metallurgical testwork 63 geologically mapped 63 trenching 63 VTEM anomaly 63 gold mineralization intersected 62 geophysics 62 Carotare 62 soil geochemical anomaly 62 overburden sampling 62 outcropping mineralization 62 IOCG targets 62 inversion modeling 62 manganese mineralization 62 vanadium mineralization 62 MMI geochemical 62 drillcore 62 mineralized intrusive 62 MMI anomalies 62 Highbank Lake 62 auger sampling 62 extensional drilling 62 geophysical anomaly 62 kimberlite indicator mineral 62 Aircore drilling 62 electromagnetic EM conductors 62 Mankarga 5 62 airborne radiometric surveys 62 geophysical conductor 62 gravity anomalies 62 Airborne Geophysical Survey 62 grade drill intercepts 62 stream sediment geochemistry 62 multielement 62 artisanal workings 62 induced polarization geophysical surveys 62 geological geophysical 62 lithologic 62 Rare Earth Element REE 62 airborne electromagnetic anomalies 62 electromagnetic EM geophysical 62 mineralized boulders 62 gold geochemical anomalies 62 Fugro airborne 62 scintillometer surveys 62 VTEM Versatile Time 62 geological geochemical geophysical 62 InfiniTEM 62 Ntaka Hill 62 alteration zones 62 Pulse EM 62 Crone Geophysics 62 untested geophysical 62 VTEM airborne surveys 62 gold copper porphyry 62 PGE mineralization 62 uranium anomalism 62 lake sediment geochemical 62 kilometer 2D seismic 62 chargeability anomalies 62 volcanogenic massive sulphide VMS 62 geologic modeling 62 VLF EM 62 Dubenski property 62 Ni Cu PGM 62 coincident geochemical 62 aircore holes 62 excavator trenches 62 resource delineation drilling 62 TerraX 62 Drill hole SADD# 62 3D seismic survey 62 Calandria Norte 62 petrological 62 orogenic gold 62 kimberlitic material 62 anomalous molybdenum values 62 gold mineralization 62 copper molybdenum gold 62 ground magnetometer surveys 62 NE Wollaston 61 molybdenite mineralization 61 prospective stratigraphy 61 mineral occurrences 61 Minera Afrodita 61 corehole 61 PGM mineralization 61 potentially bulk mineable 61 mineralized quartz veins 61 seismic reprocessing 61 nickel sulphide 61 resistivity geophysical 61 sampling trenching 61 nickel sulphide mineralization 61 geology geochemistry 61 Aeromagnetic 61 sulphide zones 61 meter spacing 61 Reverse Circulation drilling 61 BHEM 61 Nyota Prospect 61 geochemical assay 61 REE bearing 61 3D Seismic 61 resource delineation 61 Titan# 61 Geotech Airborne Limited 61 electromagnetic anomaly 61 geochemical assays 61 Gravity Survey 61 bearing quartz vein 61 petrographic 61 gossans 61 Ouro Roxo 61 open pittable 61 ground radiometric surveys 61 gossanous 61 kimberlite dykes 61 penetrating geophysical 61 cobalt mineralization 61 lithogeochemical sampling 61 Fugro Airborne 61 magnetic geophysical anomaly 61 Koshaj 61 IP geophysical anomalies 61 Soquem 61 km2 3D seismic 61 Volcanogenic Massive Sulphide VMS 61 Ciresata 61 Roughrider uranium deposit 61 anomalous soil geochemistry 61 anomalies coincident 61 geological mapping geochemical sampling 61 sediment sampling 61 Higo Blanco 61 Snowfield Zone 61 radon anomalies 61 Mt Penck 61 lithology 61 anomaly coincident 61 IP chargeability anomaly 61 Pitaloza 61 coincident gravity 61 Condor Consulting 61 Hibou dyke 61 reconnaissance geological mapping 61 kimberlite occurrences 61 Calandria Sur 61 gravity anomaly 61 anomalism 61 SOMINE property 61 BHEM surveys 61 dimensional seismic 61 basal till 61 magneto telluric 61 Simuku 61 uranium mineralization 61 infill holes 61 anomalous mineralization 61 Muirs Reef 61 F2 Zone 61 geophysical signatures 61 geochemical anomaly 61 El Compas 61 Au Cu mineralization 61 outcrop exposures 61 Duvay 61 copper mineralization 61 Roughrider East 61 mineralized outcrop 61 anomalous uranium 61 epithermal veins 61 mineralized horizon 61 Enzyme Leach soil 61 epithermal gold targets 61 mesothermal gold 61 borehole geophysics 60 Dioulafoundou 60 Magusi deposit 60 Airborne Geophysical 60 Letitna 60 structural lineaments 60 Emba Derho 60 porphyry style 60 SAMEX 60 airborne magnetic anomaly 60 mapping geochemistry 60 EM geophysical 60 Cu Au 60 Enzyme Leach 60 mineralized shear zone 60 Guayabito 60 Hambok 60 mineralized veins 60 Lalor deposit 60 Sian Praso 60 mineralization encountered 60 Zone Bambadinka 60 platinum palladium mineralization 60 Bejucosa 60 backhoe trenching 60 Mouchalagane 60 Adi Nefas 60 Zona Alta 60 diamond drillholes 60 Dombraly 60 resistivity surveying 60 lithologies 60 delineation drilling 60 disseminated sulphide mineralization 60 drill intercepts 60 Cu Ni 60 uranium occurrences 60 chargeability 60 Tantamaco 60 MMI geochemistry 60 Breccia Zone 60 approximately #km# [001] 60 Freegold Mountain 60 SJ Geophysics 60 Dogpaw 60 conductivity anomalies 60 lithological 60 Las Boquillas 60 Gwenivere 60 Amaruk 60 contracted Geotech Ltd. 60 Metallurgical testwork 60 IP Resistivity surveys 60 Vein Zone 60 Sicera Norte 60 copper molybdenum porphyry 60 antimony mineralization 60 geochemically anomalous 60 approximately #km# [002] 60 hydrothermal alteration 60 Itilima 60 Dogpaw Lake 60 Kaniago 60 radiometric prospecting 60 inferred resource calculation 60 kimberlite indicator minerals 60 Silica Ridge 60 Luhwaika 60 mafic intrusions 60 mineralized horizons 60 Kuriskova 60 Isintok property 60 sulfide mineralization 60 Shivee West 60 Induced Polarization Survey 60 mineralized zone 60 Detailed geologic mapping 60 airborne EM anomalies 60 geological mapping sampling 60 Shirotnaia 60 kimberlite float 60 REE showings 60 Ni PGE 60 potash mineralization 60 Roughrider uranium 60 radiometric readings 60 Lac Cinquante deposit 60 geophysical surveys trenching 60 epithermal gold mineralization 60 Tres Juanes Norte 60 Corachapi 60 Carbonatite Complex 60 2D Seismic 60 transient electromagnetic 60 kimberlite discoveries 60 disseminated sulphide 60 Ni Cu PGE mineralization 60 geomechanical 60 induced polarization IP chargeability 60 soil anomaly 60 delineation drill 59 El Cometa 59 mineralizing system 59 lithological units 59 High Resolution Aeromagnetic 59 stockwork vein 59 bulk tonnage mineralization 59 lineament 59 Eagle Nest deposit 59 preliminary metallurgical testwork 59 Singida Gold Project 59 drillhole database 59 REE mineralized 59 Oshiveli 59 resistivity anomaly 59 Ni Cu PGE 59 Dubenski Shaft Zone 59 Yaxtche deposit 59 PdA Extension 59 reprocessed 3D seismic 59 alaskite 59 Wona 59 mineralized vein 59 resistivity 59 kimberlite dyke 59 auriferous zones 59 kimberlites 59 Induced Polarization surveys 59 porphyry intrusives 59 RRZE 59 mineralized intercepts 59 previously unsampled 59 poly metallic mineralization 59 airborne electromagnetic AEM 59 Infill drilling 59 Puella Bay 59 penetrating electromagnetic 59 epithermal gold vein 59 VTEM conductor 59 sylvinite 59 trenching mapping 59 EM geophysical surveys 59 mineralized 59 induced polarization anomaly 59 Uzboy 59 Larder Lake Property 59 ODAE 59 massive sulphide deposits 59 Igunda 59 Zafranal 59 Golouma South 59 Lac Cinquante 59 diamondiferous kimberlites 59 kimberlitic indicator minerals 59 Ticho Project 59 sulphide bearing 59 Reverse Circulation RC 59 petrophysical 59 bearing sulphide mineralization 59 relogging 59 magnetics 59 Antimony Mountain 59 diamondiferous kimberlite 59 geophysical induced polarization 59 Magambazi 59 massive sulphide mineralization 59 3D seismic surveys 59 Musley Deposit 59 northerly trending 59 Induced Potential 59 Debarwa 59 Colnic 59 JVX Ltd. 59 Miwah Gold Zone 59 magnetic susceptibility 59 inferred resource estimate 59 Mobile Metal Ions 59 uraniferous 59 Sissingue 59 Moly Brook 59 Upper Vein 59 Quantec Geoscience Ltd. 59 Ida Dome 59 copper sulphide 59 Grevet 59 Amaruk property 59 copper skarn 59 Hasbrouck Geophysics 59 Malrok 59 Kanosak 59 downhole EM 59 Goldcliff 59 palaeochannels 59 GEOTEM survey 59 tungsten mineralization 59 Encanto Zone 59 ground geophysics trenching 59 polymetallic mineralization 59 Surface trenching 59 epithermal silver 59 outcrop samples 59 magnetotelluric survey 59 holes drilled 59 bulk mineable gold 59 Ni Cu PGM mineralization 59 holes #WR# 59 Bulk sampling 59 Aurizona Main 59 Sunbeam Pettigrew property 59 oxide copper 59 quartz sulphide veins 59 untested geophysical anomalies 59 Malbex 59 magnetite BIF 59 bulk mineable 59 Bepkong 59 Delineation drilling 59 Uranium mineralization 59 Kasala Main Zone 59 Puma Exploration 59 Kwanika 59 EM anomaly 59 Aappaluttoq 59 Thor Trend 59 dike swarm 59 porphyry mineralization 59 potentially open pittable 59 Tortigny deposit 59 3Ace 59 #-# compliant resource 59 GEOTEM 59 Langmuir Property 59 ground radiometric surveying 59 ultramafic rocks 59 Klaza Zone 59 Fayolle property 59 sulphide deposit 59 resource estimation 59 formation BIF 59 element geochemical 59 Kavola East 59 Zuun Mod molybdenum 59 Reconnaissance mapping 59 Junnagunna 59 vein breccia 59 sulphide mineralization 58 mineralization 58 Harena 58 stepout drilling 58 reverse circulation 58 electromagnetic VTEM survey 58 copper molybdenum mineralization 58 Emba Derho Adi Nefas 58 diamond drill intercepts 58 lateral extensions 58 downhole geophysics 58 geochemistry anomalies 58 mineralization intersected 58 electromagnetic EM 58 gravity gradiometry 58 Fugro Ground 58 sulphide mineralized 58 ground truthing 58 Reconnaissance prospecting 58 Sudbury Breccia 58 felsic volcanic 58 electromagnetic conductor 58 carbonatite complex 58 Juanicipio Vein 58 AHGZ 58 jasperoid 58 mineralogical 58 Fayolle Deposit 58 #WR# 58 epithermal quartz veins 58 mineralized corridor 58 Cordero Porphyry Belt 58 volcanogenic massive sulfide VMS 58 magnetite ilmenite mineralization 58 Aeroquest Limited 58 Mineralized Zone 58 Ni Cu 58 Kay Tanda 58 resistivity lows 58 Renard cluster 58 copper porphyry 58 borehole Pulse 58 uranium vanadium mineralization 58 NE trending 58 skarn zones 58 EW trending 58 Anuri kimberlite 58 geotechnical drilling 58 Pellivuoma 58 rockchip 58 Drill Targets 58 alaskite bodies 58 Cordero Porphyry 58 massive sulfide mineralization 58 Tagpura 58 km induced polarization 58 Sulfato 58 Bellechasse Timmins 58 porphyries 58 Thelon Basin 58 Kirana Break 58 chromite occurrences 58 Kitenge Prospect 58 Preliminary metallurgical testwork 58 calcrete 58 deformation corridor 58 spectrometric 58 rock geochemistry 58 Kutcho 58 Goldpines North 58 Sulphide Shear Zone 58 Haquira East 58 Rojo Grande 58 epithermal gold silver 58 Rare Earth Element 58 quartz veined 58 mineralogical studies 58 magnetic lineaments 58 stockwork zone 58 RC drillholes 58 meter spacings 58 ANIT 58 volcanic sedimentary 58 Diamond Drilling 58 Induced Polarization anomaly 58 silicic 58 Airborne Magnetic 58 NSAMT 58 Nyafe 58 vein swarms 58 geophysics geochemistry 58 airborne radiometric anomaly 58 Dioulafoundou zone 58 Siribaya mega structure 58 Norlartic 58 bulk minable 58 Kipawa deposit 58 Piaba 58 Tatajuba 58 Induced polarization IP 58 Geophysical Surveys 58 reprocessed seismic 58 mafic ultramafic rocks 58 magnetite bearing 58 Hadal Awatib 58 Rovina porphyry 58 El Domo deposit 58 soil sampling trenching 58 kimberlite pipes 58 Hotish 58 El Domo 58 mineralized breccia 58 kimberlite pipe 58 sulphide occurrences 58 vein stockworks 58 Los Zorros 58 quartz stockworks 58 Promontorio 58 glacial overburden 58 ultrabasic 58 Talat Gadalla 58 intrusive breccia 58 Golouma West 58 VMS Ventures 58 Cu Zn 58 Amarc 58 massive sulphide intersections 58 porphyry copper 58 Wellgreen 58 heliborne magnetic 58 Au Cu 58 sulphide deposits 58 laterite mineralization 58 bulk tonnage gold 58 Rusk Zone 58 Kierens 58 Zafranal Main Zone 58 Induced Polarization IP chargeability 58 Clementine vein 58 iron carbonate alteration 58 #m@#.#g t Au [001] 58 anomalous copper 58 skarn deposits 58 uranium radiometric anomalies 58 Reverse circulation 58 eluvial 58 epithermal gold 58 Akasaba Mine 58 volcanogenic massive sulphide 58 mineralized porphyry 58 Mistassini property 58 Magistral deposits 58 Jahodna 58 skarn mineralization 58 Leprechaun Deposit 58 wireline logging 58 Douay Ouest 58 Okohongo 58 Falea 58 Fiskenaesset 58 Fayolle deposit 58 TSX VENTURE VMS 58 Pinguino property 58 East Acma 58 silica breccias 58 Sleeping Giant Zone 58 Reverse Circulation 58 rhyolite tuffs 58 molybdenum mineralization 58 litho geochemical 58 crestal 58 Gradient Array 58 quartz vein 58 Senior Geochemist 58 aircore drill 58 hematite mineralization 58 ultramafic rock 58 Etango deposit 58 Homestake Silver 57 intrusives 57 geophysical interpretations 57 Solotomo 57 Cerro de Oro 57 Suuri zone 57 SGH anomalies 57 Kahuna kimberlite 57 geologic interpretation 57 Skarn 57 IOCG mineralization 57 Gramalote 57 Naciente Quebrada Pedregosa 57 Alaskite Zone 57 coreholes 57 underground mineable 57 stockwork mineralization 57 Cumpie Hill 57 magnetometer surveying 57 Klappibacken 57 Kiaka 57 MMI soil geochemistry 57 Las Bolas 57 geochemistry 57 kilometer airborne geophysical 57 metavolcanic 57 Quebrada Verde 57 Kelex 57 Kangaluwi 57 Bonanza Ledge 57 Tres Or 57 stratigraphy 57 massive sulphide lenses 57 airborne EM conductors 57 Nucleus Zone 57 chromitite 57 infill drilling 57 coincident chargeability 57 bulldozer trenching 57 Laterite 57 chromite mineralization 57 flotation testwork 57 Pidgeon Molybdenum Deposit 57 Drill Hole Locations 57 Chucara 57 hole GF# 57 gamma logging 57 stratigraphic horizons 57 massive sulphide horizon 57 coincident induced polarization 57 JVX 57 Yaramoko 57 supergene copper 57 Aeroquest 57 Curipamba 57 kimberlitic bodies 57 #m@#.#g t gold [002] 57 disseminated magnetite 57 Bellekeno deposit 57 Spider KWG 57 Southeast Pediment 57 massive sulphides 57 outcropping quartz veins 57 Emba Derho deposit 57 Lac Levac 57 Nakru 57 lateritic 57 holes RR# 57 anomalous soil geochemical 57 mineralizations 57 sq km 3D seismic 57 kimberlite 57 volcanogenic massive sulfide