Related by context. All words. (Click for frequent words.) 81 #m@#.# g t [002] 81 #m@#.# % [001] 80 #m@#.# g t Au [002] 80 #m@#.# % [007] 79 #m@#.#g t Au [003] 79 #m@#.# % [004] 79 #m@#.#g t Au [001] 78 #m@#.#g t Au [005] 78 @ #.#g t [002] 78 #m@#.# g t Au [006] 78 #m@#.#g t [002] 78 #m@#.#g t Au [004] 77 @ #.#g t [001] 77 #m@#.#g t [006] 77 #m@#.#g t Au [006] 77 #m@#.#g t [004] 77 intersected #.#m [002] 76 #m@#.#g t gold [001] 76 m@#.# g t Au [002] 76 #m@#.# % [006] 76 m@#.# g t [003] 76 g t PGM 76 #.#g t gold [005] 76 #.#g t silver [003] 76 intersected #.#m [001] 75 metres@#.# % [002] 75 g t Pt 75 #.#g t silver [004] 75 averaging #.#g t [001] 75 @ #.#g t [004] 75 #.#g t [005] 75 #.#g t gold [001] 75 #m@#.# g t Au [001] 75 #m@#.#g t [001] 74 @ #.#g t [003] 74 metres@#.# % [003] 74 #g t Ag [001] 74 #TR# 74 oz t Ag 74 #m@#.#g t Au [002] 74 t Au 74 #WR# 74 m@#.# g t [004] 74 Au Cu 73 #m@#.# g t Au [007] 73 #m@#.#g t gold [002] 73 Calandria Norte 73 #.#g t Ag [004] 73 Cu Zn 73 #m@#.# % [005] 73 #m@#.# g t [003] 73 metres@#.# % [001] 73 #m@#.# g t Au [003] 73 #ppm Mo 73 #m@#.# g t [004] 73 hole MJV 73 grading #.#g t [002] 73 #.#g t Au [003] 73 #.#gpt [002] 73 #.#g t [002] 73 #m grading #.#g [002] 73 interval assaying 73 #g t Au [001] 73 #.#g t Au [004] 72 #.#g t Ag [005] 72 Intersected 72 metres@#.# g t Au [002] 72 #m@#.#g t [003] 72 #.#g t Au [002] 72 Kavola East 72 metres@#.# g t Au [003] 72 grading #.#g t [001] 72 mineralized pegmatite 72 #m@#.# % [002] 72 Significant intersections 72 % Nb#O# 72 meters grading #.#g [001] 72 averaging #.#g t [003] 72 Copper Mineralization 72 #m@#.# g t Au [004] 72 intersected #m@#.# 72 #.#g t [003] 72 + Pd 72 averaging #.#g t [002] 72 ZFDDH# 72 Alaskite 72 Cu Zn Ag 72 ppm eU#O# 72 #m@#.# g t [001] 72 + Pd + 72 MPD# 72 metres@#.# g t [003] 71 ppm Ag 71 Au t 71 Metres Averaging 71 pyrite pyrrhotite chalcopyrite 71 g t Pd 71 #.#gpt gold [002] 71 copper #.#g t [002] 71 #.#m grading #.#g [001] 71 KRC# [001] 71 #.#gpt gold [001] 71 Mineralised 71 t Ag 71 BRAZD 71 #.#gpt Au [001] 71 Hole intersected 71 Ni Cu PGM mineralization 71 Tres Juanes Norte 71 #.#g t [004] 71 Au Cu Ag 71 #m@#.# g t Au [005] 71 weakly anomalous 71 Kelex 71 #.#gpt [001] 71 Au Cu mineralization 71 Drilling Extends 71 Pt + Pd 71 #,# g t 71 Drill intersections 71 DDD# 71 #.#g t silver [002] 71 3E PGM 71 Mineralized Zone 71 #ppm molybdenum [002] 70 #.#gpt [003] 70 silicified breccia 70 metres@#.#g t gold 70 Footwall Zone 70 KDH# [001] 70 drilled thicknesses 70 chalcocite chalcopyrite 70 @ #ppm U#O# 70 Cu Ni 70 variably mineralized 70 Y Zr 70 Near Surface 70 -Expandable Memory 70 intersected mineralized 70 excavator trenches 70 intersected anomalous 70 mineralized zones intersected 70 Assay Results 70 sulfide bearing 70 KDH# [002] 70 Takom 70 Dienemera 70 Quebrada Verde 70 Stepout 70 Ciresata deposit 70 Drill Hole Results 70 sericitic 70 NQ diamond 70 + Y#O# 70 Drill Holes 70 Tungsten Molybdenum 70 Chiis 70 phyllic altered 70 DUB# 70 AngloGold Ashanti Titiribi 70 mineralization encountered 70 #JD# 70 #g t [001] 70 #g t Ag [002] 70 hole ZFRC# 70 Cu Au porphyry 70 mineralized quartz 70 Ni Cu PGM 70 veins stockworks 70 sericite pyrite 70 Banded Iron Formation 70 Significant intercepts 70 surface outcrops 70 #m@#.#g t [005] 70 vein stockwork 70 sedex 70 #.#g Au t [003] 70 outcrop sampling 70 intersected variably 70 gm Au 69 Kau# 69 Drill Intersections 69 quartz feldspar 69 DDH# [001] 69 Mt@#.# % [002] 69 trace chalcopyrite 69 Pokukrom West 69 Stockwork 69 grading #.#g t Au [001] 69 carbonate veins 69 TC# #d 69 #g t [002] 69 #m@#.# g t [006] 69 hypogene mineralization 69 section #E [004] 69 Pb Zn Ag 69 Trench TKB# 69 WDC# 69 intersected disseminated 69 Mineralized intercepts 69 bearing sulphide mineralization 69 Colnic 69 Bornite 69 Rare Earth Element REE 69 Ag Pb Zn 69 strongly silicified 69 aircore drill holes 69 induced polarization anomalies 69 % Cu #.#g 69 Cu Au mineralization 69 drill hole NAD# 69 Cu Zn Au Ag 69 Juanicipio Vein 69 Kay Tanda 69 Skarn Zone 69 #.#g t gold [004] 69 sulphide breccia 69 Cu Au 69 Zn Ag 69 Massive Sulphides 69 Cu Ag 69 intercept grading 69 Cu Ni Co 69 anomalous soil geochemistry 69 Hangingwall 69 Zn mineralization 69 trenching sampling 69 Fobiri 69 True Width 69 #WA 69 #m@#.# g t [005] 69 adit sampling 69 diorite porphyry 69 downdip extension 69 meters@#.# g t [002] 69 ppm cobalt 69 chalcopyrite bornite 69 stratigraphically below 69 Mt Penck 69 KBDD# 69 zinc #.#g t 69 % MoS2 69 #.#g t Ag [002] 69 Sulphides 69 UG2 Reef 69 diamond drillholes 69 #.#oz t [002] 69 tungsten mineralization 69 Kerekounda 69 SIN# 69 intersected anomalous gold 69 sheeted quartz 68 Drilling Intersects 68 oz t Au 68 Massive Sulphide 68 intersected sulphide mineralization 68 vein stockworks 68 garnet skarn 68 #.# gpt silver 68 #ppm Cu 68 Merensky Reef 68 Tres Juanes 68 Drilling Underway 68 mineralized skarn 68 WDD# 68 UG2 Chromitite Layer 68 Sulphide Zone 68 Nueva Caledonia 68 lamprophyre 68 pyrite altered 68 #ppm molybdenum [001] 68 mineralized dykes 68 Amun Deeps 68 #.#g t Ag [003] 68 Bejucosa 68 vein outcrops 68 metres@#.# g t Au [001] 68 #.#Mt grading [001] 68 gossans 68 Zn Au 68 Ntaka Hill 68 g t grammes 68 hematite goethite 68 Geophysical surveys 68 #ppm U 68 Golouma West 68 g Ag 68 metres@#.# g t [001] 68 mylonite 68 TGDH#D 68 Au CHL# 68 chloritized 68 intersect massive sulphides 68 disseminated sulphide mineralization 68 #.#g t Pt 68 silicified breccias 68 #.#gpt Au [002] 68 hole NAD# 68 quartz sericite pyrite 68 Massive sulphide 68 Reverse circulation 68 MRC# [002] 68 Zinc Zn 68 chalcopyrite mineralization 68 Anomalous values 68 Soil Anomaly 68 cobalt mineralization 68 Aircore drilling 68 Las Boquillas 68 intersected kimberlite 68 Felsic 68 -ActivClient 68 Golouma South 68 quartz ankerite 68 sulphide veins 68 downhole depth 68 Cumpie Hill 68 Silver Mineralization 68 Mt@#.# g t [001] 68 stockwork veining 68 Copper Cu 68 Porcupine Destor 68 Webbs Silver 68 Dioulafoundou 68 drill hole SADD# 68 Oshiveli 68 #.#g t Au [001] 68 Alaskite Zone 68 mineralized outcrops 68 #.#g t Ag [001] 68 #.#g t Au [005] 68 Ag Pb 68 #.#g Ag t 68 Breccia Zone 68 stockwork veined 68 gm t 68 Ag Au 68 hole SP# 68 sulphide mineralized 68 ZK# [002] 68 allanite 68 Hole EC# 68 Naciente Quebrada Pedregosa 68 stockwork breccia 68 silicified zones 68 Calandria Sur 67 aircore drilling 67 mineralized diorite 67 copper molybdenum mineralization 67 Surface sampling 67 Adi Nefas 67 Niakafiri 67 #.#Mt @ [002] 67 Marta Este 67 ppm Ta#O# 67 sulphide intersections 67 m@#.# g t Au [003] 67 #g t [003] 67 massive sulphide horizon 67 magnetite bearing 67 Molybdenum Mo 67 #.#g/tAu 67 m grading 67 abundant pyrite 67 Takom Zone 67 bearing quartz carbonate 67 MK RC 67 copper mineralization intersected 67 Gold Intersected 67 Ni Cu Co 67 Louvicourt 67 intersected sulphide 67 hole RC# 67 Section #E [004] 67 Butia prospect 67 ppm molybdenum 67 intersected anomalous radioactivity 67 sphalerite galena 67 airborne geophysical anomalies 67 itabirite 67 m@#.# g t [002] 67 -Wauk 67 HREO TREO 67 Massive Sulphide VMS 67 hole DDH# 67 copper molybdenum gold 67 Hole PXE 67 vein assayed 67 Gongondy 67 Njame 67 silicified quartz 67 #.#g t [006] 67 Cu Au Ag 67 Drilling Confirms 67 Hole WAT# 67 leachable copper 67 Pb Zn 67 DDH# [002] 67 intrusive breccia 67 Klaza Zone 67 nickel Ni 67 aircore drill 67 LC#C 67 Hypogene 67 Tantamaco 67 magnetite skarn 67 Initial Resource Estimate 67 m@#.# % 67 Laterite 67 Reverse Circulation 67 Metallurgical Testing 67 anomalous concentrations 67 outcropping mineralization 67 hematite mineralization 67 Drill Intercepts 67 intersected massive sulphides 67 Drillholes 67 Tortigny 67 Cu mineralization 67 ultramafics 67 Ultramafic 67 SLD# 67 Nueva Concepcion 67 alaskite 67 #m downhole 67 Au Ag Cu 67 hole BRAZD 67 meters grading #.#g [002] 67 EJD# 67 La Morocha 67 polymetallic Au Ag 67 Metres Grading 67 ppm Pb 67 gpt silver 67 PGM mineralization 67 palaeochannel 67 quartz veined 67 LURC# 67 copper skarn 67 #CBN 67 Gold Per Tonne 67 Malrok 67 leachable copper mineralization 67 Tonnes Au 67 variably altered 67 Langmuir Nickel Discovery 67 hole WAT# #A 67 sulphide zones 67 Reverse Circulation drilling 67 stockwork zones 67 Cu Pb Zn Ag 67 felsite 67 section #N [002] 67 ultramafic rock 67 epithermal silver 67 outcrop exposures 67 chalcopyrite pyrite 67 hole MWNE 67 cherty 67 Tonnes Au g t 67 manganese mineralization 67 scheelite bearing 67 bearing skarn 67 #W# [002] 67 BB# [002] 67 drillhole intersected 67 Zn Cu Ag 67 Kourouloulou 67 spodumene bearing 67 Au Cu Mo 67 Dubenski Shaft Zone 67 volcanic stratigraphy 67 Nickel Ni 67 Maybrun 67 Nfante West 67 TWDDH 67 subcrop 67 stringer sulphides 67 infill diamond 67 granodiorites 67 Cobrecon 67 Santa Pancha 67 Cu Eq 67 intersected massive sulphide 67 Footwall 67 -Dins 67 Cu Au Mo 67 anomalies coincident 67 alunite 67 Outcropping 67 hole WAT# 67 Confirms Continuity 67 SADD# 67 quartz muscovite 67 Real Viejo 67 WAT# 67 Tiriganiaq 67 diamond drillhole 67 #m grading #.#g [001] 67 Au Ag 67 Pokukrom East 67 Unconformity 67 Kanosak 66 disseminated sulphide 66 Ambrex 66 Uranium Mineralization 66 Ciresata 66 PdA Extension 66 disseminated stringer 66 excavator trenching 66 gossanous 66 Valle Hondo 66 Mala Noche Footwall Zone 66 Lithology 66 Letitna 66 ppm Zn 66 aircore 66 soil geochemical anomalies 66 magnetite mineralization 66 Geochemical sampling 66 g t Rubidium 66 Mt@#.# % [001] 66 Hondo Valle 66 Marge Vein 66 Syenite 66 GOLD EXPLORATION 66 g t Beryllium 66 Ouro Verde deposit 66 Au Eq 66 rich VMS mineralization 66 Meters Averaging 66 molybdenum tungsten 66 epidote 66 YAR# 66 geochemically anomalous 66 mineralized drill intercepts 66 Dombraly 66 Mineralisation 66 Cr#O# 66 Batoto 66 Bisha Main 66 Gwabe 66 TRD# 66 Grams Per Tonne 66 quartz hematite 66 Zn Cu 66 gold anomalism 66 Polymetallic 66 Drill Hole Locations 66 Cu porphyry 66 vein breccia 66 tonnes grading #.#g t [002] 66 IOCG mineralization 66 Silver Lead Zinc 66 Mankarga 66 ZrO2 66 El Cafetal La Virgen 66 Kierens 66 soil geochemical surveys 66 Cu Mo Au 66 Molybdenum Copper 66 bulldozer trenching 66 tuffaceous 66 Arsenopyrite 66 copper Cu 66 altered diorite 66 Nb#O# 66 per tonne gpt 66 Roughrider East 66 silica pyrite 66 Cerro Dorado 66 ppm U#O# 66 hole CJV 66 Au Ag mineralization 66 oz ton silver 66 talus fines 66 Infill Drilling 66 Pigiput 66 Ni Cu 66 drillhole spacing 66 tonnes@#.# % [003] 66 Cu Mo Au Ag 66 Encino Vein 66 REE bearing 66 Veta Minitas 66 % Cu #.#g/tAu 66 pyrophyllite 66 stockwork mineralization 66 massive sulphide zones 66 Ciresata Porphyry 66 quartz sericite 66 DDH IAX 66 #.#g Au t [002] 66 RC percussion 66 DUB#W# 66 To Length Au 66 diopside 66 Hugla Tepe 66 silicified limestone 66 Sleeping Giant Zone 66 calcrete sampling 66 hole GF# 66 auriferous zones 66 Orebody 66 El Compas vein 66 spodumene rich 66 massive sulfide mineralization 66 meters@#.# g t Au 66 hole NR# 66 El Cometa 66 #RB# 66 gm t Au 66 molybdenum rhenium copper 66 chalcocite covellite 66 Marban deposit 66 SPDD 66 uraniferous 66 ppm Nb 66 MR# #C 66 Yttrium Y 66 Sulfide 66 Southwest Oyu 66 Expands Mineralization 66 Huarabagoo 66 Drilling Continues 66 tungsten trioxide 66 Significant Intersections 66 gm tonne 66 gpt Ag 66 potassic altered 66 anomalous mineralization 66 m@#.# 66 Porphyry Zone 66 vein breccias 66 #.#Mt @ [003] 66 anomaly coincident 66 chlorite sericite 66 KBRC# 66 REE Y Zr 66 Diamond Drill Holes 66 Gold Intercepts 66 soil geochemical survey 66 % Fe#O# 66 mineralized shear zones 66 hematite magnetite 66 exhalite 66 bearing quartz tourmaline 66 hole #SWC 66 porphyry skarn 66 potash mineralization 66 Preliminary metallurgical testwork 66 greisen 66 Bananghilig 66 arsenopyrite mineralization 66 Muirs Reef 66 anomalous copper 66 wallrock 66 Tiriganiaq deposit 66 geological mapping trenching 66 sericite chlorite 66 extensional drilling 66 galena mineralization 66 #.#Mt grading [002] 66 oxidized mineralization 66 bearing breccias 66 massive sulphide intersections 66 Hurdman Property 66 chromitite 66 stockwork veins 66 hole LA# 66 mineralized breccia 66 Buriti trend 66 Grandroy 66 Drilling Resumes 66 chalcedonic 65 Mineralization intersected 65 Moz Au 65 Pegmatite 65 massive sulphide mineralization 65 TRK# 65 quartz stringers 65 #.#Mt @ [001] 65 MGZD# [002] 65 quartz molybdenite 65 Nd#O# 65 potentially open pittable 65 Grams Tonne Gold 65 Ag Eq 65 REE showings 65 Emba Derho 65 Zamora Batholith 65 sericite carbonate 65 antimony Sb 65 covellite 65 altered rhyolite 65 Junnagunna 65 Molybdenite 65 massive sulphide grading 65 % Cr#O# 65 Zn Pb 65 Simuku 65 mineralized intrusive 65 intensely silicified 65 #.# meters downhole 65 dacitic 65 gossan 65 geochemical soil 65 Aricheng West 65 Geological mapping 65 brecciated quartz 65 chalcocite mineralization 65 Central Mineralised Zone 65 Strike Length 65 Gold Mineralization 65 underground delineation drilling 65 surface trenching 65 1g t 65 anomalous uranium 65 Porphyry Target 65 Garrcon shaft 65 trench sampling 65 Zam Zam Shenkman 65 Klaza property 65 Copper Equivalent 65 soil geochemistry anomaly 65 holes MM# 65 gpt gpt 65 Molybdenum Mineralization 65 % Cu Eq 65 hole GW# 65 LREO 65 #m@#.# 65 molybdenum mineralization 65 mineralized intercept 65 ppm Mo 65 finely disseminated 65 Supergene 65 g t PGE 65 Guajes West 65 bornite chalcopyrite 65 Rusk Zone 65 holes IKD 65 vein intercepts 65 massive sulfides 65 #Mt grading [002] 65 footwall alteration 65 pyrite sphalerite 65 Thor Trend 65 silica carbonate 65 Beruang Kanan 65 Djambaye II 65 ppm Cu 65 #-# intersected 65 #.#gpt TPM 65 potassically altered 65 altered silicified 65 Assay Results From 65 Grab Samples 65 gAu tonne 65 Cu Mo 65 layered mafic 65 gold porphyry mineralization 65 Naybob 65 Gossan Hill 65 volcaniclastic rocks 65 Grade Mineralization 65 holes #WR# 65 Significant assay 65 Epithermal 65 sericite schist 65 Moly Brook 65 Cerro Moly 65 Adumbi prospect 65 copper #.#g t [001] 65 Las Bolas Los Hilos 65 Uranium mineralization 65 calcareous siltstones 65 Mineralized Zones 65 Onkelo 65 calc silicate 65 quartz alunite alteration 65 Sissingue 65 coincident geophysical 65 Marra Mamba 65 sulfidation style 65 % eU#O# 65 Haquira Cu Mo 65 silver #.#g t 65 soil geochemistry anomalies 65 AZS# 65 unoxidized 65 Diamond Drill Hole 65 Chert Ridge 65 alaskites 65 geophysical conductors 65 Cu Mo Ag 65 Jumping Josephine 65 Kangaluwi 65 quartz stockworks 65 anomalous molybdenum 65 altered felsic 65 uranium mineralization intersected 65 MMI anomalies 65 Calcite Hill 65 Anomalous gold 65 g t Gallium 65 quartz sulphide veins 65 auger drill 65 mineralizations 65 oxides TREO 65 subhorizontal 65 calcrete 65 hole NC# 65 Buffalo Ankerite 65 weakly mineralized 65 locally graphitic 65 epithermal quartz 65 Mbenge Zone 65 aircore holes 65 sulphide bearing 65 Azulitas 65 formation BIF 65 Ixtaca 65 Category Tonnes 65 Nakru 65 El Compas 65 #g t Au [002] 65 lithogeochemical 65 Diamond Drill 65 pyrite veins 65 pyritized 65 Caracucho 65 grading #g 65 soil geochemical 65 Drill Hole RCHE 65 % TCu 65 RC drillholes 65 mineable widths 65 molybdenite mineralization 65 quartz monzonite 65 Volcanogenic Massive 65 mafic intrusive 65 Significant Intercepts 65 polymetallic deposit 65 TiTac 65 drillholes totaling 65 REE mineralized 65 leucogranite 65 coincident geochemical 65 Mouchalagane 65 DB#B# 65 Zinc Mineralization 65 g t Au eq 65 Mantouchiche showing 65 silica breccia 65 Ce#O# 65 stockworked 65 Hole HB# 65 oz ton Ag 65 soil geochemical anomaly 65 Copper Molybdenum 65 mineralized widths 65 volcanogenic massive sulphides VMS 65 MMI soil geochemical 65 Ngayu 65 Quartz vein 65 Commences Drill Program 65 Dadiangou 65 magnetite BIF 65 #.# oz ton 65 massive sulphide lens 65 Puajanca Zone 65 Fayolle deposit 65 pyroxenite 65 Drill Hole 65 copper sulphide mineralization 65 intersected mineralized zones 65 semi massive sulphide 65 meta sedimentary 65 NN Zone 65 GPD# 65 #ppb [002] 65 drill intercepts 65 Dip Azimuth 65 Money Knob 65 infill holes 65 granitic pegmatites 65 magnetite ilmenite mineralization 65 Ounces -Recipe Chicken 65 % copper #.#g 65 g t Aueq 65 Planchas de Plata 65 Haquira Project 65 Niobium Nb 64 Discovery Outcrop 64 Extends Mineralization 64 copper sulphides 64 sulphidized 64 Chucara 64 basal till 64 quartz biotite 64 magnetite hematite 64 Hangingwall Zone 64 Y#O# 64 Au incl 64 Pozo Seco 64 Luhwaika 64 grams tonne 64 zinc sulphides 64 Bokan Dotson Ridge 64 Regcourt 64 GOLD COPPER 64 epithermal gold mineralization 64 Longshot Ridge 64 anomalous Au 64 pyrite arsenopyrite 64 ppm U 64 drill hole HR# 64 Cu Pb 64 molybdenum sulphide 64 Carbonatite 64 intense silicification 64 Drilling Intercepts 64 Meters Grading #.# 64 #.#g t Pd 64 kimberlite breccia 64 #CF# 64 lbs U#O# 64 Mt@#.# g t Au [001] 64 alunite alteration 64 tonne Au 64 Zinc Lead 64 Section #E [003] 64 disseminated sulfide 64 Shirotnaia 64 hole TL# 64 chemical metasedimentary rocks 64 epithermal quartz veins 64 Chalcopyrite 64 Megabuck Zone 64 EGD# 64 quartz tourmaline breccia 64 Quebradona 64 Osisko Intersects 64 Barre de Fer 64 gAu t 64 scheelite 64 meters downhole depth 64 potentially bulk mineable 64 stringer mineralization 64 polymetallic massive sulphide 64 Bulk Tonnage 64 Mineralized intersections 64 Dip -# 64 abundant quartz veining 64 anastomosing 64 lithium tantalum 64 quartz reef 64 mineralized occurrences 64 - -Gundberg 64 interval grading #.#g 64 sulphide deposits 64 chalcopyrite sphalerite 64 subvolcanic 64 rockchip 64 Interval m 64 -Greg Stoda Palm Beach 64 South Barnat 64 tin indium zinc 64 #.#g Au t [005] 64 mineralization assaying 64 porphyry deposit 64 Mineralized intervals 64 Leprechaun Pond 64 Quartz Vein 64 Silica Ridge 64 ppm antimony 64 #.#Mt grading [003] 64 saprolitic 64 Big Daddy Chromite 64 gold mineralization intersected 64 porphyries 64 Au Ag Cu Zn 64 grade drill intercepts 64 Nyafe 64 borehole geophysics 64 El Domo deposit 64 Massive Sulfide 64 El Cuatro 64 -Hisarcıklıoğlu 64 m@#.# g t Au [001] 64 mineralized lenses 64 previously unsampled 64 @ #ppm eU#O# 64 ankerite 64 Poly Metallic 64 Southeast Pediment 64 Ag Cu Zn 64 mafic intrusion