Related by context. All words. (Click for frequent words.) 77 #.#g t silver [004] 76 interval assaying 75 #m@#.#g t Au [001] 75 intersected #.#m [001] 74 #m@#.# g t Au [002] 74 metres@#.# g t Au [002] 74 #m@#.#g t Au [004] 74 #.#gpt [002] 74 #.#g t silver [003] 74 @ #.#g t [002] 73 m@#.# g t [003] 73 #m@#.# g t [002] 73 intersected mineralized 73 metres@#.# % [002] 73 intersected #.#m [002] 73 averaging #.#g t [003] 73 metres@#.# g t Au [003] 72 drilled thicknesses 72 #m@#.# % [004] 72 #m@#.#g t [002] 72 #m@#.# g t Au [006] 72 m@#.# g t Au [002] 72 #m@#.# g t Au [007] 72 g t PGM 72 averaging #.#g t [001] 72 #ppm Mo 72 @ #.#g t [001] 72 Dip Azimuth 72 #m@#.# g t Au [003] 72 #.#g Au t [003] 72 % Cu Eq 71 grading #.#g t [001] 71 #m@#.#g t Au [002] 71 #m@#.#g t Au [006] 71 LC#C 71 #.#g Au t [005] 71 KDH# [001] 71 @ #.#g t [003] 71 #m@#.# g t [003] 71 stratigraphically below 71 intercept grading 71 #m@#.# % [003] 71 grading #.#g t [002] 71 #m@#.#g t Au [005] 71 zinc #.#g t 71 @ #.#g t [004] 71 meters grading #.#g [001] 71 #.#g t gold [001] 71 BB# [002] 71 g t Pt 71 hole BRAZD 71 #m@#.#g t [006] 71 #m@#.# % [007] 71 meters@#.# g t [002] 71 #m@#.#g t Au [003] 71 #.#g t [002] 71 copper #.#g t [002] 71 Azimuth Dip 70 Metres Averaging 70 #.#g t [005] 70 #m@#.# g t Au [005] 70 m@#.# g t [004] 70 #-# intersected 70 #m@#.# g t Au [001] 70 #.#gpt [003] 70 grading #.#g t Au [001] 70 #.#g Ag t 70 Massive Sulphide 70 #m@#.#g t [004] 70 % Nb#O# 70 #.#g t [004] 70 meters@#.# g t Au 70 #.#gpt [001] 70 Bisha Main 70 #g t Ag [001] 70 #.#g t [003] 70 oz t Ag 70 oz ton silver 70 metres@#.#g t gold 70 Pokukrom West 70 #m@#.# % [001] 70 KRC# [001] 70 #.#g t Ag [005] 70 Pt + Pd 70 Dienemera 70 g.Au t 70 -ActivClient 69 #.#g t Ag [001] 69 #.#gpt Au [001] 69 Gold Intersected 69 #.#g t Ag [004] 69 #ppm molybdenum [002] 69 Au t 69 + Pd + 69 #m@#.#g t gold [001] 69 t Ag 69 -Hisarcıklıoğlu 69 gm t 69 -Expandable Memory 69 intersected kimberlite 69 #.#g t gold [005] 69 metres@#.# % [003] 69 #g t Au [001] 69 Kavola East 69 @ #ppm U#O# 69 #m@#.# % [006] 69 #,# g t 69 Tonnes Cu 69 NQ diamond 69 3E PGM 69 downhole depth 69 metres@#.# g t [003] 69 quartz hematite 69 intersected variably 69 hole YD# 69 m@#.# 69 Gongondy 69 #m grading #.#g [002] 69 Mineralized Zone 69 True Width 69 ppb Pd 69 HREO TREO 69 Zinc Zn 69 intersected massive sulphides 69 Langmuir Nickel Discovery 69 vein stockwork 69 Stockwork 69 #m@#.# % [005] 69 % MoS2 69 ppm Ag 69 SADD# 69 Key Tuffite horizon 68 #m@#.#g t [001] 68 pyrite altered 68 + Pd 68 t Au 68 hypogene mineralization 68 % Cu #.#g 68 -Joel bro Benji 68 #m@#.# g t [004] 68 #.#m grading #.#g [001] 68 averaging #.#g t [002] 68 #m@#.# g t [006] 68 Drilling Extends 68 intersected weakly mineralized 68 #m downhole 68 To Length Au 68 g t PGE 68 intersected disseminated 68 intersected anomalous 68 metres@#.# g t Au [001] 68 Tiriganiaq 68 Djambaye II 68 intersected anomalous radioactivity 68 Drilling Intersects 68 sphalerite galena 68 Expands Mineralization 68 Strike Length 68 #JD# 68 Mt@#.# g t [001] 68 hole MJV 68 Length m 68 #.#oz t [002] 68 Intersected 68 massive sulphide horizon 68 #.#g t Ag [002] 68 Metres Grading 68 hematite goethite 68 Bracemac Zone 68 mineralization encountered 68 g t Pd 68 drillhole intersected 68 intersected anomalous gold 68 #m@#.#g t [003] 68 % TCu 68 interval grading #.#g 68 TGDH#D 68 ppm cobalt 68 #.#gpt TPM 68 g t grammes 68 silver #.#g t 68 #m@#.#g t gold [002] 68 meters grading #.#g [002] 68 ppm eU#O# 67 TCu 67 Hole EC# 67 silicified porphyry 67 #WR# 67 section #N [002] 67 Gwabe 67 Meters Averaging 67 Dip -# 67 #m@#.# g t [005] 67 massive sulphide grading 67 -Wauk 67 Chiis 67 m@#.# % 67 Unconformity 67 sericitic 67 bearing skarn 67 Hondo Valle 67 phyllic altered 67 #.#Mt @ [002] 67 pyrite pyrrhotite chalcopyrite 67 #m@#.# g t [001] 67 section #E [004] 67 altered silicified 67 mineralized pegmatite 67 Interval m 67 KBDD# 67 Hangingwall 67 #.#Mt grading [002] 67 Mineralised 67 volcaniclastic rocks 67 intensely silicified 67 Luhwaika 67 #.#gpt gold [002] 67 #m@#.# % [002] 67 gm tonne 67 Moz Au 67 vein assayed 67 quartz feldspar 67 Confirms Continuity 67 chalcopyrite pyrite 67 gm Au 67 metres@#.# % [001] 67 gpt gpt 67 Azulitas 67 #.#m #.#m [004] 67 g t 4E 67 hole MWNE 67 g t TPM 67 vein stockworks 67 intersected #m@#.# 67 bearing sulphide mineralization 67 quartz molybdenite 67 #.#g t gold [004] 67 Near Surface 67 #ppm U 67 #.#gpt gold [001] 67 Cu Zn Ag 67 Skarn Zone 67 Mineralized intercepts 67 Zn mineralization 67 #.# gpt silver 67 carbonate veins 67 Mt@#.# g t Au [001] 67 Li# 67 chloritized 67 % Fe#O# 66 Mt@#.# % [002] 66 Cu Zn 66 Extension Occurrence 66 aircore drill holes 66 ZFDDH# 66 KBRC# 66 weakly anomalous 66 TRK# 66 gt Au 66 Sulphide Zone 66 diorite porphyry 66 Soil Anomaly 66 Au Cu 66 AZS# 66 #RB# 66 AngloGold Ashanti Titiribi 66 Ag Pb Zn 66 Cu Eq 66 Syenite 66 Ciresata deposit 66 Ag Pb 66 sericite pyrite 66 Grams Per Tonne 66 Anomalous uranium 66 Cu Au Mo 66 Y#O# 66 Chalcopyrite 66 -Dins 66 Drill Hole 66 Bornite 66 copper #.#g t [001] 66 sedex 66 intersected mineralized zone 66 gm t Ag 66 Drill Intersections 66 DB#B# 66 spodumene rich 66 -Living Independently 66 #.#Mt @ [003] 66 #m@#.# 66 Marta Este 66 Diamond Drill Hole 66 Copper Mineralization 66 m@#.# g t [002] 66 #.#m grading #.#g [002] 66 % Cu #.#g/tAu 66 Massive Sulphides 66 Kelex 66 m@#.# g t Au [003] 66 #.#m #.#m [005] 66 g t Au eq 66 stockwork veined 66 #.#g t Au [002] 66 trace chalcopyrite 66 DDH# [001] 66 #.# oz ton 66 Drilling Confirms 66 UG2 Chromitite Layer 66 Hugla Tepe 66 chalcopyrite bornite 66 #m@#.#g t [005] 66 Mala Noche Footwall Zone 66 Trench TKB# 66 metres@#.# g t [001] 66 copper molybdenum mineralization 66 Gold Oxide Skarn 66 -Baralt 66 #.#oz t [001] 66 #TR# 66 VVGD 66 ppm Ta#O# 66 Copper Equivalent 66 Drilling Intercepts 66 + Y#O# 66 -Keichi 66 Longshot Ridge 66 Fobiri 66 Cr#O# 66 Pt Pd Au 66 Drilling Underway 66 Million ozs 66 Southwest Oyu 66 Kau# 66 g t Gallium 66 #CF# 66 potassically altered 66 veins stockworks 66 #.#g Au t [002] 66 #ppm molybdenum [001] 66 Njame 66 - -Anne Milling 66 Drill Hole Results 66 bearing quartz carbonate 66 drill hole SADD# 66 #g t [001] 65 Easting Northing 65 Suuri 65 mineralized skarn 65 GOLD EXPLORATION 65 Gramalote Ridge 65 Felsic 65 Pt g t 65 -LeCureux 65 Malrok 65 Section #E [004] 65 Takom 65 Au Cu mineralization 65 Hole PXE 65 Y Zr 65 Bejucosa 65 -Patney 65 Pivert East 65 chalcopyrite copper 65 ppb Pt 65 Ni Cu Co 65 #.#g t Pd 65 -Whitsunday Regional 65 quartz sericite pyrite 65 Alaskite 65 CuT 65 t Pd 65 Assay Results 65 -Beth Kimmerle author 65 Uranium Mineralization 65 hole NAD# 65 #/-# 65 Ounces -Recipe Chicken 65 #.#g t PGM 65 stringer mineralization 65 Au CHL# 65 #ppm Cu 65 chalcocite chalcopyrite 65 SLD# 65 Drill intercepts 65 Onkelo 65 #.#gpt Au [002] 65 Hangingwall Zone 65 #g t [002] 65 -ALBANY NY AP/# WINS 65 strongly silicified 65 Golouma West 65 gm t Au 65 pyrite galena sphalerite 65 Drill Holes 65 #.#g t Ag [003] 65 Indicated Category 65 Ag Cu 65 LURC# 65 m Width m 65 Au Ag Cu 65 chlorite sericite 65 Silver Mineralization 65 oz Au ton 65 Calandria Norte 65 Kanosak 65 g t Beryllium 65 Drill intersections 65 Moly Brook 65 FMR dikes 65 Las Boquillas 65 Ntaka Hill 65 Zn Ag 65 Outcropping 65 intersected sulphide 65 shearing alteration 65 Cobrecon 65 Zamora Batholith 65 Footwall Zone 65 Hypogene 65 granitoid bodies 65 Category Tonnes 65 Northing Easting 65 drillhole spacing 65 Meters Grading #.# 65 ppm Pb 65 OTD# 65 % eU#O# 65 Adi Nefas 65 Mantouchiche showing 65 Artavasdes 65 chalcedonic 65 Reverse Circulation 65 Tonnes g t 65 MPD# 65 GG6 65 Upper Bracemac 65 Zam Zam Shenkman 65 #g t Ag [002] 65 Ag Au 65 Footwall 65 granitic gneiss 65 silicified zone 65 #.#Mt grading [003] 65 garnet skarn 65 mineralized alteration 65 zinc sulphides 65 mineralized zones intersected 65 Grota Seca 65 advanced argillic 65 Cu Mo Au Ag 65 -Greg Stoda Palm Beach 65 Significant Intersections 65 Osisko Intersects 65 #.#g t Au [003] 65 g t Au Eq 65 Silicified 65 galena mineralization 65 quartz calcite 65 diopside 65 -Dropper 65 wallrock 65 #.# meters downhole 65 breccia mineralization 65 #g t Ag [003] 65 potassic altered 65 ultramafics 65 Hervieux East 65 KDH# [002] 65 Sulphides 65 #.#g t Au [004] 65 #g t Au [002] 65 copper mineralization intersected 65 quartz sericite 65 Extends Mineralization 65 Ni Cu PGM mineralization 65 altered diorite 65 Nyafe 65 variably mineralized 65 -original Hitlist 65 silica carbonate 65 Au Eq 65 mineralization grading 65 hole #VK 65 Kerekounda 65 t Au #.#g t [001] 65 Gold Per Tonne 65 #.#Mt grading [001] 65 stratigraphic horizon 64 Dioulafoundou 64 Twangiza Main 64 drilled widths 64 silicified breccia 64 Kileba 64 quartz ankerite 64 epithermal quartz 64 g tg t 64 Au Cu Ag 64 - -Schwenkler 64 brecciated quartz 64 alunite 64 intersected massive sulphide 64 Zn Cu Ag 64 polymetallic Au Ag 64 Langmuir Discovery 64 EMD# encountered #.# 64 hematized 64 Diamond Drill Holes 64 t U#O# 64 quartz monzonite 64 #E [002] 64 ZK# [002] 64 Bellechasse Timmins 64 quartz alunite alteration 64 Grab Samples 64 Grade Mineralization 64 Ni Cu PGM 64 silicified zones 64 Nakru 64 Tonnes Au g t 64 anomalous mineralization 64 Garrcon shaft 64 GPD# 64 Maybrun 64 Heruga copper gold 64 Ouro Verde deposit 64 Ag Cu Zn 64 Porphyry Zone 64 Nb#O# 64 #Mt grading [002] 64 rockchip 64 pyrite veins 64 Anomalous values 64 grading #g 64 Copper Cu 64 Pb Zn Ag 64 Puajanca Zone 64 Grandroy 64 g t Ag Eq 64 tonne Au 64 BRAZD 64 intersected sulphide mineralization 64 oz ton Au 64 meters downhole 64 Announces Assay Results 64 #m grading #.#g [001] 64 intersected #.#g t 64 #ppb gold 64 Zirconium Zr 64 hematite mineralization 64 quartz muscovite 64 #W# [002] 64 WDC# 64 RC drillholes 64 hole LL# 64 ultramafic unit 64 Suuri zone 64 Bulk Tonnage 64 massive sulphides grading 64 epithermal stockwork 64 veinlet 64 -Lightning goaltender Nikolai 64 sylvinite 64 ppm indium 64 #.#g t Au [005] 64 Lomita Pina 64 mineralization assaying 64 #N [003] 64 El Cafetal La Virgen 64 mineralized diorite 64 allanite 64 Yttrium Y 64 Rare Earth Element REE 64 #.#g/tAu 64 Terrane Mt 64 grade massive sulphides 64 gr t Au 64 Nueva Concepcion 64 mineable widths 64 Lower Carboniferous 64 #CBN 64 eU 3 64 quartz arsenopyrite 64 FNX# 64 #.#g t silver [002] 64 disseminated fine grained 64 hole GW# 64 silicified quartz 64 gossanous 64 pyrite arsenopyrite 64 tourmaline veins 64 volcanic breccias 64 intersected widths 64 Quartz Vein 64 footwall rocks 64 g t Aueq 64 mineralized peridotite 64 #KV# 64 Tres Juanes Norte 64 gold arsenic antimony 64 Kunche 64 oz Au t 64 sulphide mineralized 64 mafic intrusives 64 quartz porphyry 64 graphitic schist 64 Tonnes Au 64 Matoush fault 64 g t Ounces 64 #.#gpt [004] 64 fracture fillings 64 quartz stringers 64 vein breccias 64 Pigiput 64 g Ag 64 stockwork veining 64 #m@#.# g t Au [004] 64 Molybdenum Mo 64 MAG Silver Reports 64 adit sampling 64 Ag Eq 64 Ag g t 64 quartz veins containing 64 Cu Zn Au Ag 64 granodiorites 64 magnetite skarn 64 per tonne gpt 64 Kourouloulou 64 -Kosslyn 64 TRDH 64 quartz veinlet 64 MS Veins 64 hole CJV 64 sulphide veins 64 manganese mineralization 64 hematite mafic 64 + Pd g t 64 QAP DDH 64 drill hole NAD# 64 Porphyry Target 64 Au g t 64 ODAE 64 m@#.# g t Au [001] 64 macrocrystic 64 g mt 64 Quebradona 64 Niakafiri 64 Pokukrom East 64 Lupita Mine 64 Grams Tonne Gold 64 fuchsite 64 Limosna 64 Palaeozoic sedimentary 64 - -Linda Shrieves Orlando Sentinel 64 stringer sulphides 64 Significant intercepts 64 potentially mineable widths 64 gpt Ag 64 TC# #d 64 Tin Lode 64 Massive Sulfide 64 AgEq 63 quartz pyrite 63 DDD# 63 gm mt 63 -human papilloma viruses 63 TW Incl 63 mineralized quartz 63 silica breccia 63 meters@#.# g t [001] 63 SIN# 63 Djambaye 2 63 TC# #c 63 RC# intersected 63 Significant Intercepts 63 mineralized intercept 63 Stepout 63 aircore drilling 63 chalcocite mineralization 63 quartz sulphide veins 63 hole EC# 63 Cerro Vetas 63 Infill Drilling 63 scheelite bearing 63 #COM# 63 vein outcrops 63 altered rhyolite 63 metavolcanic 63 nickel Ni 63 Au incl 63 Cu Au 63 Parbec 63 Au Ag Cu Zn 63 Gold Intercepts 63 Medrizien 63 sub Athabasca unconformity 63 granodiorite porphyry 63 Djambaye 63 #WA 63 Massive sulphide 63 ppm molybdenum 63 pelitic gneisses 63 hole GF# 63 spodumene bearing 63 DUB# 63 % copper #.#g 63 sulphide breccia 63 #,#-#,# ft. Loc 63 Cu Ni Co 63 geochemically anomalous 63 epidote 63 quartz tourmaline breccia 63 Miminiska 63 massive sulphide intersections 63 tonnes@#.# g t Au [001] 63 Reverse circulation 63 Inferred Category 63 Cu Mo Au 63 anomalous Au 63 Roughrider East 63 downdip extension 63 m@#.# g t Au [004] 63 Cu Pb Zn 63 silica pyrite 63 magnetic geophysical anomaly 63 Saprolite mafic intrusive 63 Breccia Zone 63 quartz adularia veins 63 % Cu eq 63 potentially bulk mineable 63 Cerro Moly 63 Commences Drill Program 63 #.# oz Au 63 ZrO2 63 altered granodiorite 63 g t AuEq 63 Epithermal Gold 63 Naciente Quebrada Pedregosa 63 Oshiveli 63 #.#m #.#m [003] 63 Longitudinal Section 63 previously unsampled 63 Significant intersections 63 #.#Mlbs U#O# [001] 63 bornite chalcopyrite 63 Hole WAT# 63 chemical metasedimentary rocks 63 Orebody 63 vein breccia 63 ICE# [002] 63 Golouma South 63 Ultramafic 63 Au Ag 63 abundant pyrite 63 Key Tuffite 63 Koshaj 63 metavolcanic rocks 63 m grading 63 Lamothe Showing 63 3PGE + Au 63 Skarn 63 chalcopyrite mineralization 63 felsite 63 K2O 63 calc silicate 63 Birkhead Formation 63 TiTac 63 lamprophyre 63 intense silicification 63 anomalous Cu 63 Tatajuba 63 MGZD# [002] 63 Hole IKD 63 Lower Acacus Formation 63 felsic intrusive rocks 63 Lac Shortt 63 mineralized dykes 63 sulfidation style 63 #.#-#.# m [001] 63 1g t Au 63 uraniferous 63 #.#m #.#m #.#m [003] 63 hole DDH# 63 biotite chlorite 63 garnet biotite 63 Kierens 63 tungsten mineralization 63 biotitic 63 sheeted quartz 63 leached capping 63 ppm Nb 63 serpentinized 63 #SH# 63 Colnic 63 intersected silicified 63 subcrop 63 syenite intrusive 63 Aricheng West 63 induced polarization geophysical surveys 63 oxidized mineralization 63 feldspar porphyry 63 #ppm eU#O# 63 Nd#O# 63 Core Length 63 leachable copper 63 Supergene 63 Cerro la Paila 63 Zn Au 63 pentlandite 63 - -Staehely 63 altered volcanics 63 sulfide bearing 63 volcanogenic 63 quartz magnetite chalcopyrite 63 Porcupine Destor 63 mafic tuffs 63 holes DDH 63 Ouro Roxo 63 Pb Zn Cu 63 Junnagunna 63 # mN 63 gAu tonne 63 anomalous antimony 63 Gold Mineralization 63 vuggy silica alteration 63 #ppb Au [002] 63 hole RL# 63 Mineralization Extended 63 Ambrex 63 mafic intrusion 63 disseminated sulphide 63 Pegmatite 63 Once Bocas 63 silicified rhyolite 63 drill hole MWNE 63 magnetite BIF 63 mineralized gabbro 62 Banded Iron Formation 62 Epithermal 62 carbonatized 62 norite 62 Skouries copper gold 62 -Revolutionary Girl Utena 62 Ayelen Vein 62 -about.me 62 Nueva Caledonia 62 gpt Pt 62 anomalous soil geochemistry 62 Barite Hill 62 Cu Au mineralization 62 Fula Tepe 62 disseminated pyrrhotite 62 Norlartic 62 Cu Mo 62 Sorowar 62 Volcanogenic Massive 62 Tiriganiaq deposit 62 diamond drillholes 62 ppm Zn 62 kimberlite breccia 62 hole HR# 62 Selodong 62 stockwork mineralization 62 @ #ppm eU#O# 62 RC percussion 62 Plata Diatreme 62 South Miwah Bluff 62 DG# #C 62 Molybdenite 62 Nfante West 62 REE showings 62 downhole intervals 62 Huarabagoo 62 Mineralisation 62 Targets Identified 62 Drillhole 62 tonnes@#.# % [003] 62 Delineation Drilling 62 mineralized interval 62 Initial Resource Estimate 62 outcropping mineralization 62 shallowly dipping 62 Mineral Resource Summary 62 gossans 62 CMR# 62 Cu Ag 62 Fold Nose 62 Drilling Continues 62 Qavvik 62 -#/# [002] 62 bearing quartz tourmaline 62 g t palladium 62 hole FC# 62 sericitized 62 hole BR# 62 pyritized 62 felsic intrusive 62 NK# [002] 62 Assays Pending 62 LJ#r 62 vuggy quartz 62 Batoto 62 Mineralized Zones 62 tungsten WO 3 62 ft TW 62 clastic rocks 62 sheared mafic 62 eU#O# 62 arsenopyrite mineralization 62 footwall zone 62 BCGE# 62 Adit Block 62 As Sb Hg 62 Valle Hondo 62 ankerite 62 oz ton gold 62 silicified breccias 62 Quartz vein 62 sericite chlorite 62 mineralized stockwork 62 diamond drillhole 62 g t Au Ounces 62 pyrite galena 62 Naybob 62 stockwork breccia 62 cobalt mineralization 62 quartz stockworks 62 quartz veined 62 mineralized shear zone 62 Section #E [003] 62 Hallnor 62 excavator trenches 62 Adumbi prospect 62 grammes tonne 62 E#/# [002] 62 To Width Au 62 kimberlitic material 62 Las Naves 62 tungsten trioxide 62 Tungsten Molybdenum 62 hole RC# 62 altered dacite 62 stockworked 62 Drill hole GCL# 62 metres@#.# g t [002] 62 cherty 62 hole DH# 62 anomaly coincident 62 silicified outcrops 62 andesite flows 62 tin indium zinc 62 Width m 62 altered felsic 62 copper anomalism 62 #,#-#,# ft. 62 minor chalcopyrite 62 finely disseminated 62 Riscos de Oro 62 1g t 62 GPGR 62 vein intercepts 62 sheared ultramafic 62 Dombraly 62 Villeta U 62 Section #NE [002] 62 Riscos 62 DDH# [002] 62 Arap Tepe 62 chalcopyrite sphalerite 62 phyllites 62 South Minita 62 -#:# GMT/# 62 carbonate vein 62 mineralizations 62 Section #N [002] 62 felsic dike 62 pelite 62 antimony Sb 62 Au Ag Pb Zn 62 Athabasca unconformity 62 strongly altered mafic 62 -NTRA Thoroughbred Poll 62 altered andesitic 62 calcareous siltstones 62 secondary chalcocite 62 Timmins Porcupine West 62 Lac Pivert 62 ppm U 62 intermediate metavolcanics 62 ppm Ta 62 - -Informed Consent 62 Guajes West 62 pyrite chalcopyrite sphalerite 62 -stephen lawson@idg.com 62 g t g t 62 #.#g t [006] 62 andesite volcanics 62 Muirs Reef 62 gms tonne 62 footwall alteration