GEOLOGICAL SURVEY OF WESTERN AUSTRALIA REPORT 92 PLATE 1
117^00' 116°41À ê00ôôôÜE 117°30À 118°00À 118°15À è80 ê20 ê40 ê60 ê80 ì00ôôôÜE ì20 20°17À 20°17À SYMBOLS MINERAL OCCURRENCES
? Geological boundary...... MINERALIZATION STYLESÝ* MINERAL AND ROCK COMMODITY GROUPS Fault or shear...... Porphyry, pegmatite, greisen, and skarn Precious mineral ? thrust, triangle on upthrown side...... Cape Thouin Precious metal è60 concealed...... Orthomagmatic mafic and ultramafic Steel industry metal concealed, interpreted from aeromagnetic data...... ? ? Vein and hydrothermal Base metal ? Fold, showing axial trace and generalized plunge direction Cape Legendre Stratabound volcanic and sedimentary Iron ìMW-od anticline...... Stratabound sedimentary and/or Industrial mineral syncline...... sedimentary banded iron-formation ìMW-od ? aterial ñFFgi-gv overturned syncline...... Construction m COHEN I LEGENDRE I Regolith hosted Bedding, showing strike and dip 40 Undivided KEAST I inclined...... ? I N D I A N O C E A N PILBARA M.F. vertical...... MINERAL AND ROCK COMMODITIES Collier Rocks RIVER ñMRhe-gmp MARBLE BAR DISTRICT horizontal...... Antimony...... Sb ? 80 overturned...... Asbestos, chrysotile (serpentine)...... Asbs ìMW-od HAUY I ìRH-od 116°30À ìMW-od ? ìMW-od ìMW-od îî40 strike and dip estimated from aerial photography...... Bentonite...... Bent îî40 ? horizontal...... Bismuth...... Bi BRIGADIER I GIDLEY I ìMW-od ñMRmi-gm ñMRhe-gmp DELAMBRE I 50 igneous banding, showing strike and dip...... Beryl...... Brl LADY NORA I ? REEF I Way-up indicator Chert...... Chrt ROSEMARY I QUARTERMAINE I ñMR-gm ? pillow structure...... Chromium...... Cr ìMW-od DOLPHIN I COSSIGNY HILL YULE Ti,Cr,Fe KENDREW I ñMR-gm sedimentary structure...... Clay...... Cy 10 ìMW-od Cape Cossigny ROAD ñFO-xb-s ANGEL I ? ? graded bedding...... Cobalt...... Co A R C H I P E L A G O ñCDbl-xb-s è40 25 ìMW-od CREEK cross-bedding...... Copper...... Cu 20°30À MALUS I ñFFgi-og I S L A N D S 20°30À Metamorphic foliation, showing strike and dip Corundum...... Cor ìMW-od WHIM 118°15À ìMW-od inclined...... 50 Mundabullangana Dolerite...... Dl MAWBY I ? RONSARD I vertical...... ? 45 Sloping Point Garnet...... Grt ? ñMR-gm YULE RIVER ? ? 60 ñMRhe-gmp Cleavage, showing strike and dip Gold...... Au GOODWYN I CONZINC I WEST 75 inclined...... WHITTAKER I ñmyyPWP Iridium...... Ir ? ? 15 ñFFgi-gv Mineral or stretching lineation, showing trend and plunge Bore Rock MOUNT BURRUP BEZOUT I ñCDc-s Iron...... Fe D 10 inclined...... WEST LEWIS I Lead...... Pb 45 ? ñFO-xb-s ILLINCOTHERRA HILL od 30 ? Fracture, joint, or extension vein, showing strike and dip D A M P I E R 45 m Limesand...... Lsd 50 ìMW-od ? Iron Ore Loader inclined...... ? Nickel...... Ni od ? ñMR-gm ? ? ìMW-od 118964 ìMW-od Cape Lambert SABLE Is Isotopic age determination site with identification number...... Osmium...... Os ? ñCDbl-xb-s ñFO-xb-s od 20 ìMW-od BURRUP PENINSULA ? ìMW-od Palladium...... Pd ENDERBY I ? F O R E S T I E R ñSTop-xo-a ìMW-od 10 ñWCr-f Highway with national route marker...... 1 ìMW-od ? ì20 Platinum...... Pt ìMW-od 60 ñMRhe-gmp ñre-b 80 ñMRhe-gmp ñFFgi-gv 30 15 25 70 ñSTpt-gfd Road, sealed...... ñMRhe-gmp Hearson ? ? îî20 Platinum Group Elements...... PGE îî20 DEPUCH I 80 50 ? 30 DIXON I Point Samson ñWCr-f Road, unsealed...... Quartz (crystal)...... Qzt EAST LEWIS I ìMW-od ñSTse-xo-a ñSTse-xo-a od MW93Ê10 WEST MOORE Is Major track...... 35 ? ñSTse-xo-a 80 ìMW-od Ruby...... Ruby ? ? ñMRhe-gmp 80 EAST INTERCOURSE I ìMW-od 20 ñMR-gm Railway...... od ìMW-od ? ? 10 ìMW-od PEAWAH HILL Sandstone...... Sdst ? MISTAKEN I ? ìMW-od ? ? od EAGLEHAWK I ? ? ? ? 76 m Airport...... ìMW-od od WALCOTT I 127330 ñFO-xb-s ñFO-xb-s Silver...... Ag INTERCOURSE I ? 75 ñFFgi-gv causeway ? ñre-b JARMAN I ? ñCDm-s od 10 N I C K O L B A Y 75 45 Townsite ñMRhe-gmp 25 od 20 85 Titanium...... Ti è20 EAST MID INTERCOURSE I od ? PEMBERTON I WICKHAM ñCDbl-xb-s ? 45 ñMRca-gm population more than 10Ý000...... KARRATHA WEST MID INTERCOURSE I 80 Vanadium...... V DAMPIER Cossack DAMPIER 15 ? 30 ñOPbl-gm 1Ý000Ê10Ý000...... ? ? Zinc...... Zn
od ñMR-gm ROAD WEST INTERCOURSE I Rocky 45 PICARD I S H E R L O C K B A Y 25 70 ìMW-od 40 ñSTpt-gf less than 1000...... Whim Creek ? 40 75 DAMPIER ñMRmi-gm ñGCe-ca 136899 Balla 40 SHARP PEAK 80 55 ñGCe-ca Fault Pb,Zn Sb PEEWAH Homestead...... Mallina od ñOPmw-fdp Fe ñCDbl-xb-s Balla Mineral occurrences are from the GSWA WAMIN database. ìMW-od ? ìMW-od ìRH-od 65 127327 ? ñMR-gm Cu,Ag,Au 75 ñMRhe-gmp ? 30 ñOPmw-fdp 80 Au,Sb National park boundary...... *ÝLarger symbols represent mines or deposits also in the DoIR MINEDEX database. ìRH-od ? 85 Creek ñFFgi-gv 70 Au od STATION HILL Fe 60 ñre-b 75 ñre-b Levee...... 50 ñCDi-xs-fnv SANDY I 60 Au ROAD 30 144224 ñROr-xb-u 70 ñCDbl-xb-s KARRATHA Cy 80 ñOPbl-gm 80 CREEK ìMW-od ìRH-od ñFFgi-gv ? 80 25 ñOPmw-fdp Au,Sb DEEP WELL HILL 50 45 Sb,Zn,Cu Watercourse...... SALT 50 ñWCr-f ìMW-od y 45 25 od 80 RIVER ìMW-od ñFFgi-og Au Cy ìMW-od 70 ? wa 80 Os,Ir,Pt,Pd ñre-b MOUNT WANGEE ñSTop-xo-a ìMW-od 70 80 118966 Pb,Zn EVAPORATION 70 70 BALLA Cu,Pb,Sb ñFO-xb-s ìMW-od 116°08À K 136819 Pb,Zn od ARRATH Au cause Au ìMW-od ? ñFFgi-og Bent ìMW-od 1 ñOPan-xo-a Zn Mineral field boundary...... 50 Au ñCDi-xs-fnv 20°45À 136844 ñCDbn-b WHIM ìMW-od ìRH-od PONDS ñROn-xca-f ìMW-od od Poverty 60 Qzt ìMW-od ñmyyPWP od ñSTpt-gfm Mine, abandoned mine, or deposit...... Nickol River (Godlonton) ? ñMRhe-gmp 30 A25 70 Qzt Qzt ìMW-od 60 70 70 ìMW-od ñMR-gm Pb,Cu,Zn,Ag V,Ti BALLA ñWCr-fdp 118°00À (Names are filtered for clarity) ìMW-od Au Roebourne ìMW-od V,Ti,Fe Loudens V,Ti 30 35 ñROr-xb-uROAD ñOPbl-gm NORTH EAST REGNARD I Ag Cu, 75 ñSTse-xo-a Karinha ñMRer-gm 25 ñOPfo-gg Creek ñFFgi-og ñFFgi-fai Ag ñCEkr-gg Cu ìMW-od Pb BALLA Pb,Cu ñFFgi-og N4438 Cy ìMW-od 70 60 MOUNT HALL V,Ti,Fe MOUNT NEGRI Qzt Cy ñoP 50 ñROn-xca-f Ti,V,Cu Cu ñOP-xo-a od ìMW-od 176 m ìMW-od Qzt 45 ìMW-od May Rock 60 35 60 30 îî00ôôôÜN 35 50 BALLA îî00ôôôÜN ìMW-od 70 70 ìMW-od ñWCr-fdp ì00ôôôÜE ñMRer-gm BOODANMURRA HILL Cor Cor,Ruby Whim ñFFgi-og ñMRmi-gm Chrt Zn ñFFgi-og ñFFgi-og 40 Grt Roebourne South Brl Mount Hall ìMW-od Sherlock Bay WHITE QUARTZ 118975 ñoP 70 MOUNT MARIE Asbs 70 NORTH 50 ROAD 75 Chrt Carlow 20 Ti,V Asbs ñWH-mus HILL N4413 ìMW-od Ni,Cu Asbs Brl Cu RIVER 30 SOUTH WEST REGNARD I 75 70 Castle ñOP-xo-a ñSTse-xo-a 142950 ìMW-od MOUNT REGAL 45 JS17(N4179) Cu,Co Cu,Au ñOPan-xo-a Ni,Cu,Fe Creek Whim ìRH-od Cu NICKOL 20 Asbs Zone 170 m ñFFgi-fai 70 Cu,Au,Ag WEST ìMW-od PRESTON I 65 142433 Au Au,Ag od 45 Cu,Ni Creek Cu,Au ìRH-od 45 Bent 80 Port Hedland 113 km 75 Au Cu,Au 45 169080 od ñMRca-gm ñSTse-xo-a 80 Cu Cape Preston ìMW-od 35 Ni,Zn ñOPmg-gh Grt ñCDr-mlv Ni 60 30 Shear ñRA-mgmn Bookingarra 80 80 60 ROAD ìMW-od Cu COASTAL 118964 Whim Creek FORTY MILE BEACH 75 Au ñOPre-fdp Cu,Pb,Zn,Ag Lsd ñMRer-gm Andover 15 MOUNT PRESTON 50 55 Cu 75 85 ìMW-od ñOPmg-gh 30 5 Cu,Zn, Cu Bent 70 94 m Au 20 Creek DIAGRAMMATIC SECTIONS 59 m ìMW-od 60 Cu 70 65 MOUNT GREGORY80 Sholl ìMW-od ñWCr-fdpPb,Ag ? ? N4028 RIVER 70 V,Ti,Fe,Dl 168924 MOUNT PRINSEP Ni,Cu 118979 ñOPmg-gh 168936 LITTLE 80 Cu,Ni Sholl Shear ñFFgi-fai ìMW-od MOUNT BROWN ñFFgi-og 45 ñOPsn-gg ìMW-od ñMRto-mgta 118965 155 m Mons 35 od 80 Pb,Zn,Ag ìMW-od Cu 5 MAITLAND Cockatoo Zone 70 N4128 od ñWH-mus A B C ìMW-od YERWARARRON HILL N3188 HIGH Cupri Cu 60 ñOPan-xo-a od Andover WA ìMW-od Cu 142949 72 m 50 N4097 Y 80 ñSTse-xo-a NORTH WEST Bent 60 70 JS43(N4329) 70 142430 Pb,Ag, ñSTop-xo-a Cu,Zn, Cu,Ag,Zn ìRH-od Karratha RIVER Asbs 75 Eramurra Creek McKay Creek COASTAL HIGHWAY C 75 N3214 ñROr-xb-u ìMW-od Zn,Cu Pb Pb,Au Byong Creek orring 60 ñRAtw-gf V,Ti 118976 ñGCe-ca SHERLO od ROAD 118974 Creek Asbs 75 SHERLOCK HILL Comstock Lode od 15 er 45 75 Fe JS25 ñROr-xb-u 75 Pb,Ag,Cu,Au,Zn od JS20(N4201) 85 White Quartz Well Hill Asbs ñMRer-gm TWIN TABLE Au ñmyyPWP 70 80 144256 SHERLOCK ìHAU-xca-fr ñmyyPWP 50 CHERRATTA CK ñCDbc-ona SEA LEVEL SEA LEVEL ñOP-o 15 80 Au Sherlock Creek 30 ? 75 HILLS Au,Cu 60 Loudens Patch ñFO-xb-s 15 ìMW-od ñMRje-gg Cu Au ñWHw-f 20 Jones River ìRH-od ñOPbu-xo-a E 60 ñGCe-ca 60 Cu,Pb,Zn,Ag Au ñWH-mba Y Woodbrook 20 ñWCw-s MOUNT OSCAR Asbs ñST-gmb 75 ñFO-xb-s 85 AN 65 ìMW-od ñRAtw-gf Ni,Cu Cu 75 Cu,Au,Ag,Zn 15 127320 Bent ñWHn-b MOUNT RIVER ñSTop-xo-a ìMW-od 70 Cu ñWCw-b 60 Sherlock ñCDbl-xb-s od ìMW-od ñWHn-b Bi 127378 Basset 15 5 Creek YARE 70 80 80 142830 65 ñCDbl-xb-s ñWHw-f ñWHb-b FISHER Cr Pb,Ag ìMW-od ñre-b 30 65 Ni,Cu ñCDbn-b od Cu,Pb,Ag MOUNT ADA ñSTop-xo-a 144210 ñSTse-xo-a Cy ñHAL-xkt-ci ìMW-od ñMRje-gg ñWH-mba Creek 25 MOUNT ROUGH Creek ñRApi-mgtn ìMW-od 40 114305 MOUNT ROE Ti,V 75 ? ìMW-od 50 Au Ni,Cu 60 ìMW-od ñSTop-xo-a 30 Cr ñMRer-gm C 114350 114358 W197 20 ñGCe-ca ìMW-od POTTER I ? Cu,Zn 60 ñWCr-f 40 ìMW-od CAREY I od MOUNT POTTER 70 ñSTms-xo-a 60 Bend 15 25 Au 25 ñWCr-f 87 m od 80 45 88 70 8 MOUNT SHOLL ìMW-od MOUNT FRASER ñROn-xca-f ìMW-od ñMRwh-ggp ìMW-od PGE 55 Au ñWCw-b ñWCr-fdp ñSTop-xo-a 75 5 km 5 km od Barrawanga 45 ìMW-od ìMW-od 88 m 10 35 MOUNT WILKIE 55 ñFFgi-fai Creek Warambie ñWCr-f ñSTse-xo-a ñWH-mus ñCDr-mlv 80 ñRApi-mgtn Cu,Au,Ag ñWHb-b 25 ñCDbl-xb-s ñCDi-xs-fnv ìHAU-xca-fr 25 35 114356 ìMW-od 20 ìMW-od 80 10 Creek Pb,Zn, 45 Asbs Cherratta 50 5 10 25 144261 141936 ? 10 Eramurra 88 ìMW-od 15 70 ñSTop-xo-a RIVER Cu,Ag ? Harding Dam 15 ìMW-od ñWHt-xb-f GEORGE 35 James Point ñMRer-gm 80 ñSTdi-xo-a 50 15 ñCDk-frb ñCDbl-xb-s RED HILL ñSTop-xo-a 45 od 35 Cu,Zn,Co,Ag 80 ìMW-od 60 131 m 45 ñCDbn-b ñCDi-xs-fnv 34 ìRH-od 136826 od 20 ñSTop-xo-a ìMW-od 5 45 30 îì80 20 70 60 45 40 D E F G îì80 55 10 Creek 65 40 15 ñSTop-xo-a 85 15 od N4325 ROEBOURNE ñWCr-f 118972 Cu,Zn 250 m ìMW-od Mount ê80 Sholl Shear 5 20 od 20 ñWHt-xb-f MOUNT DICK ñCDi-xs-fnv NICKOL HARDING RIVER 10 ìRH-od ñMRje-gg Ni,Cu,Co ìMW-od ñSTnw-o 60 JONES ñSTop-xo-a Karratha NORTH WEST Regal Thrust Regal Thrust Zone Western Creek HIGHWAY Creek 10 10 MOUNT LEOPOLD 35 Regal Thrust RIVER 20 D A M P I E R A R C H I P E L A G O DAMPIER Aerodrome KARRATHA COASTAL HIGHWAY 54 15 70 ìMW-od ìMW-od 15 ñWH-mba ñSTrh-xo-a Cu 60 F 5 Pd,Pt,Au ñCDbl-xb-s A 58 56 45 30 ñCDm-s 21°00À B ñWHb-b Cu,Ni,PGE RIVER 21°00À 85 5 60 ñre-b Byong 50 50 YANNERY 70 N4450 LAKE POONGKALIYARRA ñFO-xb-s ñmyyPWP ìMW-od ìMW-od ñMRwh-ggp 277 m 30 10 65 Cu,Pb SEA LEVEL ñOPan-xo-a ñWHb-b SEA LEVEL COASTAL Zn ñSTya-gfh 5 60 MOUNT McLEOD ìMW-od Sherlock Crossing ñne-gfbt ñFO-xb-s ñFO-xb-s 10 ñWH-mba MOONDLE HILL ñWHt-xb-f ìMW-od ñFO-xb-s ñoP ìMW-od McKay ìRH-od 40 50 RIVER RIVER ñWHt-xb-f Ni Sb,Au ñre-b 60 15 ñFFgi-gv ñFFgi-og ñre-b Pb,Ag WEST ìMW-od Ag,Pd 10 ìMW-od ìHAU-xca-fr ìMW-od 50 ìMW-od ìMW-od 25 ñMRje-gg N3162 ìMW-od ìMW-od ñWHb-b ñROr-xb-u 12 50 ñOP-o ñWHn-b Cooya Pooya ìMW-od ìMW-od ìMW-od Cu ìMW-od 30 TABLE HILL ìMW-od ñCEkr-gg ñROn-xca-f ìMW-od ìMW-od ñWH-mba ñWH-mba ñmyyPWP RIVER BEEDINA HILL 40 80 10 ìMW-od ASHBURTON M.F. ìMW-od 3 ñMRto-mgta 280 m DARLING PEAK ìMW-od Wellard 50 od ñMRmi-gm ñOP-o ñMRje-gg N3132 ìMW-od 75 ìMW-od ñROr-xb-u ñROr-xb-u ìMW-od NORTH HILLSñSTma-xo-a HAMERSLEY 60 ìMW-od ñROn-xca-f ñROr-xb-u ñWH-mba ñFO-xb-s WITTENOOM ñWHn-b ñOPso-gm ñOP-o Devil 8 65 BLUFF HILL ñMRmi-gm ñROr-xb-u ñEHcl-mgt 142893 10 PURRAGURRA ñFO-xb-s ñCEkr-gg ñoP ñWHn-b ñOP-o ìMW-od ñMRwa-gm 50 ñFO-xb-s ìMW-od 5 W E S T P I L B A R A M I N E R A L F I E L D 181 m ìMW-od ñOPbl-gm Pb,Zn,Ag 50 25 HILL 15 Pyramid 5 km ñWHn-b ñWHt-xb-f ñRApi-mgtn ìMW-od 5 km 20 Cu 15 ìMW-od HILLS Creek 5 ìMW-od ñFO-xb-s Cu,Zn Dl 15 ìMW-od ñCDc-swa 75 60 15 50 60 od ñWHt-xb-f 20 ìMW-od 10 Fault, showing relative displacement Asb 5 50 70 Sdst 25 60 YATHALA HILL ñMRbr-gmp 5 MOUNT WELLARD 60 N4357 ìMW-od ñROn-xca-f 10 50 142438 80 ñRApi-mgtn 10 ìMW-od ñFO-xb-s 255 m 15 Cu 60 Cu,Zn od 21°05À ìMW-od Cu,Ni 20 ìRH-od od Creek ROAD ê60 50 ñFO-xb-s 10 PINDERI Au,Pb,Ag JS35(N4350) ìMW-od 40 Au ìMW-od 10 117°30À 117°40À LESLIE ñRApi-mgtn 15 10 10 ìRH-od ìMW-od Asbs 40 Cu,Ni 15 ìMW-od 15 ñFO-xb-s ìMW-od ìMW-od ñOP-o ìRH-od 10 25 ìMW-od od Brill 10 ìRH-od ìRH-od ìMW-od Pd,Cu,Au,Ni 65 142835 Au,Cu 15 10 od ñMRje-gg Armstrong 35 10 ìMW-od 60 35 5 6 103227 ñOPso-gm ìMW-od 15 ìMW-od od 40 55 25 142832 75 ìMW-od 5 HARDING 20 ìMW-od Creek JS33(N4332) Cu 10 142657 Cr 70 10 168932The Springs od ñMRje-gg 142436 40 ñMRje-gg ìMW-od 15 ñEHcl-mgt 20 ñMRma-gg ìRH-od PGE,Au,Cu PGE,Au Creek ìMW-od MOUNT VIRCHOW ñOP-o ñZH-xod-ax 15 ìMW-od 50 PGE,Au,Cu ìRH-od ìMW-od 50 4 8 10 45 ñWH-mba ê40 3 ñMRbr-gmp Creek ñSTmu-xo-a od 10 ìMW-od 5 ìMW-od 50 ìMW-od RIVER 50 45 IRON Fortescue River Roadhouse 20 km 142661 ñRApi-mgtn RAILWAY ñMRwa-gm RIVER ìMW-od REFERENCE ìMW-od 10 5 ìMW-od ìMW-od od Millstream Homestead 73 km 10 20 5 C 8 ìMW-od ìMW-od 15 Fish reek è20 ìMW-od 20 15 10 MOUNT SABINE ìMW-od ìMW-od od 60 ìMW-od ñZH-xod-ax Moondle îì60 îì60 3 70 20 5 10 MILLSTREAM _ CHICHESTER ìMW-od ìMW-od ìRH-od Creek od 8 4 ìMW-od NATIONAL PARK ñFO-xb-s Creek ìMW-od 10 od Dolerite or gabbro dyke of uncertain age; interpreted from aeromagnetic data where dashed ñFO-xb-s ìMW-od 10 ìMW-od EAST 15 60 ñMRwa-gm 10 ñSTmu-xo-a ñZH-xod-ax ñEHcl-mgt 50 Western ìMW-od ñZH-xod-ax 50 15 ìMW-od IRON ñMRbr-gmp 15 ZEBRA HILL 50 ñFO-xb-s ìMW-od ìMW-od ìMW-od 20 60 5 ê20 15 ñMRwa-gm ìMW-od ñMRje-gg 168934 HARDING ìMW-od 12 50 10 ìMW-od 30 60 RA ìMW-od PGE ILW STEWART PEAK PROTEROZOIC 10 246 m Creek od ìMW-od ñMRje-gg AY ñMRbr-gmp 5 5 RIVER Hamersley Group, upper part: banded iron-formation, chert, siltstone, shale, dolerite, ìMW-od 60 ìHAU-xca-fr ìRH-od ìMW-od 50 ìMW-od10 G and rhyolite ìMW-od 35 ìMW-od ìMW-od 10 ìMW-od 8 ñMRbr-gmp 5 ìMW-od 5 10 60 Tanga ìMW-od Hamersley Group, lower part: carbonate rock with lesser siliciclastic sedimentary ìRH-od ìMW-od od ìMW-od ROBE ñHAL-xkt-ci Round Hummock Dolerite Suite: dolerite dyke, fine to medium grained; interpreted from aeromagnetic data Munni ñMRbr-gmp rocks, banded iron-formation, and chert ìMW-od ìMW-od ìMW-od ìMW-od c. 755 Ma â Mundine Well Dolerite Suite: dolerite dyke with locally abundant granitic xenoliths and potassic alteration of wallrocks; local syenite; interpreted from aeromagnetic data Tanga ìMW-od ìRH-od NERRELY LEUCOGRANITE: biotite(Êtourmaline)-bearing 5 Tom Price 204 km ñFFgi-gv c. 2765 Ma ê ñne-gfbt ìMW-od c. 2724 Ma å ñFFgi-og ñFFgi-fai leucogranite; unfoliated ìMW-od Munni ñFO-xb-s
ìMW-od Mount Bruce Supergroup ñFO-xb-s ê00ôôôÜE 2775Ê2629 Ma ì è ä ñFO-xb-s Fortescue Group: undivided basaltic and sedimentary rocks 5 10 117^00' ñFFgi-gv GIDLEY GRANOPHYRE: fine- to medium-grained granophyre; commonly porphyritic 70 5 ìMW-od ìMW-od ñFFgi-og Gabbro; interpreted from aeromagnetic data HAMERSLEY BASIN ìMW-od ìMW-od Flying Foam Suite ìMW-od 5 ñFFgi-fai Granophyric, xenolith-rich dyke; generally andesitic ìMW-od 3 Pannawonica 105 km West Pilbara Superterrane, Gorge Creek Basin, Whim Creek Basin, and intrusive rocks Mallina Basin and intrusive rocks ìRH-od ìMW-od od Stratigraphic succession ìMW-od Intrusive rocks Stratigraphic succession, NW margin of basin Stratigraphic succession, centre of basin Intrusive rocks ìMW-od ìMW-od ìMW-od ìMW-od ìRH-od od Booyeema od è80 îì40 ìRH-od Creek îì40 ñoP Gabbro or dolerite dyke ìMW-od BOOYEEMA HILL ìMW-od ìRH-od ìMW-od ìMW-od 5 ñZH-xod-ax Zebra Hill Suite: dolerite and pyroxenite dyke FORTESCUE ñCEta-mgt 65 ìMW-od 30 < 3024 Ma èê ñmyyPWP Mylonite and mylonitic gneiss; chiefly in Sholl Shear Zone od Zebra Hill Suite 60 ìMW-od ñFO-xb-s 142535 5 ñCEta-mgt RIVER 10 3 ìMW-od TECTONIC UNITS è60 ñST-gmb ñSTse-xo-a ñSTdi-xo-a ñSTms-xo-a ñSTma-xo-a ìMW-od 60 7 ñCEta-mgt ñCEta-mgt od ìMW-od 4 10 è40 70 ñSTmu-xo-a ñSTrh-xo-a ñSTya-gfh ñSTnw-o ìMW-od I N D I A N O C E A N OPALINE WELL INTRUSION: gabbro and dolerite; ñSTop-xo-a local dunite, peridotite, pyroxenite, NORTHERN c. 2925 Ma ò ñST-gmb Biotite monzogranite; medium to coarse grained; metamorphosed and basaltic rock; metamorphosed CARNARVON Radley Suite c. 2931 Ma âä ñSTse-xo-a SHERLOCK INTRUSION: gabbro, and minor pyroxenite and granophyre; metamorphosed 116°30À BASIN ñSTdi-xo-a DINGO INTRUSION: gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and minor 21°28À anorthosite; metamorphosed Z o n e
116°27À Radley Suite ñSTms-xo-a MOUNT SHOLL INTRUSION: gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and
Gorge Creek Whim Creek Sisters Supersuite minor anorthosite; metamorphosed Basin Basin ñSTma-xo-a MAITLAND INTRUSION: gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and minor T e c t o n i c anorthosite; metamorphosed c. 2925 Ma î ð ñSTmu-xo-a MUNNI MUNNI INTRUSION: gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and Karratha Karratha Terrane Terrane a r a minor anorthosite; metamorphosed West Pilbara Superterrane P i l b c. 2929 Ma âô ñSTrh-xo-a RADIO HILL INTRUSION: gabbro, pyroxenite, and minor peridotite; metamorphosed Sholl Terrane P I L B A R A C R A T O N TOTAL MAGNETIC INTENSITY IMAGE Regal Terrane c. 2930 Ma ââ ñSTya-gfh YANNERY GRANITE: hornblende granite; massive; iron oxide and hornblende replaced by chlorite Mallina Lalla Rookh Basin Sholl Terrane Basin ñSTnw-o NORTH WHUNDO INTRUSION: gabbro, leucogabbro, and dolerite; metamorphosed Sisters Supersuite Gorge Creek Whim Creek Gorge Creek Basin Basin Basin C e n t r a l KIALRAH RHYOLITE: MALLINA FORMATION: interbedded shale, flow-banded porphyritic rhyolite and minor PILBARA CRATON c. 2943 Ma âå ñCDk-frb ñCDm-s ñSTpt-gf dacite; metamorphosed siltstone, sandstone, and medium- to ñSTpt-gfd ñSTpt-gfm fine-grained wacke; metamorphosed I N D I A N O C E A N ñSTpt-gf PORTREE GRANITE: pyroxene-bearing, foliated to massive ñCDbn-b ñCDbc-ona alkali granite; metamorphosed
NORTHERN Portree Suite ñSTpt-gfd Alkali granite, coarse grained; massive; metamorphosed CARNARVON c. 2946 Ma âè ñSTpt-gfm Alkali granite, medium grained; pyroxene bearing; 20°30À BASIN East Pilbara Terrane 20°30À ñCDbl-xb-s foliated to massive; metamorphosed
ASHBURTON HAMERSLEY BASIN BOOKINGARRA FORMATION BASIN ñCDbn-b Mount Negri Volcanic Member: basalt, komatiitic basalt, and basaltic andesite;
Croydon Group local siliciclastic sedimentary rocks; metamorphosed NICKOL BAY ñCDbc-ona Comstock Member: fine-grained intrusive rock; vesicular, with rare MOUNT SHERLOCK BAY pyroxene spinifex-texture; metamorphosed
MINNIE Mallina Basin ñCDbl-xb-s Louden Volcanic Member: basalt and komatiite, with locally thick siliciclastic Croydon Group
BASIN De Grey Superbasin De Grey Supergroup sedimentary intercalations; metamorphosed Modified after Tyler, I. M., and Hocking, R. M., 2001, Tectonic units of Western Australia (scale 1:2 500 000): Western Australian Geological Survey
ñCDr-mlv RUSHALL SLATE: metamorphosed shale and siltstone; minor SCALE 1:2Ý500Ý000 sandstone; graded beds; locally well developed slatey cleavage 0 25 50 75 100 CISTERN FORMATION: siliciclastic and felsic volcaniclastic Kilometres < 2964 Ma âê ñCDi-xs-fnv ñCDc-s rocks; metamorphosed ñCDc-swa
CONSTANTINE SANDSTONE 21°00À 21°00À ñCDc-s Sandstone and wacke, locally arkosic; local Age (Ma) Sedimentary and Igneous and ñMR-gm conglomerate; includes quartzite; metamorphosed volcanic rocks metamorphic rocks ñCDc-swa Wacke and subarkose, with local shale; metamorphosed 0 PHANEROZOIC ñMRbr-gmp ñMRca-gm ñMRer-gm ñMRhe-gmp ñMRje-gg 1000 MESOPROTEROZOIC ñMRma-gg ñMRmi-gm ñMRto-mgta ñMRwa-gm ñMRwh-ggp 2000 PALEOPROTEROZOIC PROTEROZOIC ñMR-gm Monzogranite, and lesser granodiorite; locally K-feldspar porphyritic; local gneissic granitic rocks; metamorphosed 3000 ñWCr-f ñWCr-fdp ñWCw-b ñWCw-s ARCHEAN ñMRbr-gmp BRILL MONZOGRANITE: porphritic monzogranite, and lesser granodiorite; microcline phenocrysts; SHEET INDEX weakly foliated; metamorphosed <3016Ê3009 Ma åê äì ñWCr-f RED HILL VOLCANICS: felsic volcaniclastic rocks, intrusive porphyritic dacite and dacitic to c. 2990 Ma äâ ñMRca-gm CAINES WELL GRANITE: biotite(Êhornblende) monzogranite; foliated; local xenoliths of granitic 4000 rhyolitic lava; includes debris-flow, turbidite and fluvial facies; metamorphosed gneiss; metamorphosed
ARCHEAN ñWCr-fdp Porphyritic dacite in subvolcanic intrusions; metamorphosed c. 2982 Ma âì ñMRer-gm ERAMURRA MONZOGRANITE: seriate biotite monzogranite containing mafic schlieren and veins of RANKIN BANK POISSONNIER BEDOUT ISLAND Whim Creek Basin
Whim Creek Group ñWCw-b WARAMBIE BASALT: vesicular basalt and basaltic andesite, locally porphyritic, volcaniclastic pegmatite; metamorphosed SE 50-14 SE 50-15 SE 50-16 and siliciclastic sedimentary rocks; metamorphosed Maitland River Supersuite ñMRhe-gmp HEARSON COVE MONZOGRANITE: monzogranite and syenogranite containing microcline megacrysts; NORTH TURTLE POISSONNIER KERAUDREN 21°30À 21°30À 116°00À 116°30À 117°00À 117°30À 118°00À ñWCw-s Sandstone, conglomerate, siltstone, and shale; metamorphosed metamorphosed I N D I A N O C E A N 2658 2758 2858 2990Ê2988 Ma äô âð ñMRje-gg JEAN WELL GRANODIORITE: Granodiorite and lesser monzogranite; foliated and weakly compositionally banded; locally sparsely porphyritic; metamorphosed MONTEBELLO LEGENDRE DELAMBRE COSSIGNY THOUIN PORT HEDLAND DE GREY PARDOO SCALE 1:1Ý000Ý000 N.T. c. 3006 Ma äê ñMRma-gg MARDEBURRA GRANODIORITE: porphyritic biotite granodiorite; foliated and weakly banded; intruded by 2057 2257 2357 2457 2557 2657 2757 2857 0 10 20 30 40 50 DAMPIER ROEBOURNE PORT HEDLAND pegmatitic leucocratic microgranite; metamorphosed Qld
Kilometres c. 2997 Ma äè ñMRmi-gm MIAREE GRANITE: monzogranite and syenogranite; foliated; metamorphosed PILBARA CRATON SF 50-2 SF 50-3 SF 50-4 SHOLL PRESTON DAMPIER ROEBOURNE SHERLOCK YULE WALLARINGA CARLINDIE COONGAN 2995Ê2985 Ma äå âî ñMRto-mgta TOORARE TONALITE: hornblende metatonalite and metagranodiorite; foliated and locally gneissic MALLINA AND WHIM CREEK BASINS W.A. 2056 2156 2256 2356 2456 2556 2656 2756 2856 c. 2988 Ma âò ñMRwa-gm WALOO WALOO MONZOGRANITE: biotite monzogranite; medium grained; weakly foliated; metamorphosed S.A. c. 2994 Ma ää ñMRwh-ggp WHYJABBY GRANODIORITE: foliated, microcline-porphyritic hornblende granodiorite; local GSWA REPORT 101 PLATES 1 & 2 xenoliths of tonalite gneiss; metamorphosed MARDIE FORTESCUE PINDERI HILLS COOYA POOYA MOUNT WOHLERSATIRIST WODGINA NORTH SHAW MARBLE BAR De Grey Superbasin N.S.W.
De Grey Supergroup 2055 2155 2255 2355 2455 2555 2655 2755 2855 YARRALOOLA PYRAMID MARBLE BAR GEOCHRONOLOGY FROM MAP AREA AND ADJACENT AREAS A.C.T. ñOPsn-gg ñOPst-gv SF 50-6 SF 50-7 SF 50-8 SAMPLE No. * AGE EASTING NORTHING OTHER ZIRCON POPULATIONS REFERENCE ñOPso-gm ñOPfo-gg ñOPmg-gh YARRALOOLA PANNAWONICA ELVIRE MILLSTREAM MOUNT BILLROTH HOOLEY WHITE SPRINGS TAMBOURAH SPLIT ROCK Vic. M. T. D. Wingate and J. W. Giddings, 2000, Precambrian Research, v. 100, p. 335Ê357. 2054 2154 2254 2354 2454 2554 2654 2754 2854 (1) ANUÊB7 * 755 û 3 Ma 393317 7465287 +1^ +1^30' BOUGUER GRAVITY IMAGE _ NOMINAL STATION SPACING 11 KM (2) 120048 * 2629 û 6 Ma 667300 7450700 A. F. Trendall et al., 2004, Australian Journal of Earth Sciences, v. 51, p. 621Ê644. Tas. (3) MW93Ê10 2724 û 3 Ma 478913 7718950 M. T. D. Wingate, in prep. 1:100Ý000 maps shown in black (4) 94792 2763 û 13 Ma 565400 7675700 N. T. Arndt et al., 1991, Australian Journal of Earth Sciences, v. 38, p. 261Ê281. ñOPre-fdp ñOPbl-gm ñOPmw-fdp Published 1:100Ý000 geological mapping used in compilation (5) 118972 2765 û 5 Ma 575091 7679276 D. R. Nelson, 1997, GSWA Record 1997/2, p. 167Ê170. 1:250Ý000 maps shown in brown (6) 86738 * 2775 û 10 Ma 436600 7598700 N. T. Arndt et al., 1991, Australian Journal of Earth Sciences, v. 38, p. 261Ê281. Non-series maps used in compilation shown in green (7) 142436 2924 û 5 Ma 485773 7664743 D. R. Nelson, 1998, GSWA Record 1998/2, p. 90Ê92. Search for current GSWA map products online (www.doir.wa.gov.au/ebookshop) I N D I A N O C E A N (8) 103227 2925 û 16 Ma 484558 7665086 N. T. Arndt et al., 1991, Australian Journal of Earth Sciences, v. 38, p. 261Ê281. ñOP-xo-a ñOP-o ñOPan-xo-a ñOPbu-xo-a (9) 118964 2925 û 4 Ma 581548 7694679 D. R. Nelson, 1997, GSWA Record 1997/2, p. 163Ê166. (10) N4450 2929 û 13 Ma 487919 7677260 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. CLEAVERVILLE FORMATION: chert and banded iron-formation; The lines indicate magnetic declination, 1995 3022Ê3018 Ma èå èô ñGCe-ca + means declination is east and correction must be (11) N3162 2930 û 4 Ma 492528 7674908 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. minor felsic volcaniclastic rock; metamorphosed 3017Ê3012 Ma åð åì åô äî ñOPsn-gg SNELL WELL GRANODIORITE: foliated granodiorite; metamorphosed added to compass bearing to give true bearing (12) 169080 2931 û 8 Ma 547720 7695670 D. R. Nelson, 2004, GSWA geochronology dataset, 2005, GSWA 169080. - means declination is west and correction must be 3023Ê3012 Ma èè åâ äð ñOPst-gv STONE YARD GRANOPHYRE: quartz-rich granophyre and quartz and feldspar-porphyritic dacite; metamorphosed subtracted from compass bearing to give true bearing 20°30À (13) 144261 2943 û 7 Ma 536754 7681956 (c. 2975 Ma), (c. 3083Ê3043 Ma), (c. 3150Ê3107 Ma) D. R. Nelson, 1998, GSWA Record 1998/2, p. 129Ê132. Gorge Creek Basin 20°30À Gorge Creek Group c. 3014 Ma åå ñOPso-gm SOUTH WHUNDO MONZOGRANITE: massive, medium- to coarse-grained monzogranite; metamorphosed (14) 142889 * 2946 û 5 Ma 611242 7696354 (c. 2978 Ma) D. R. Nelson, 1999, GSWA Record 1999/2, p. 144Ê147. Annual change is 3' easterly (15) 142949 < 2964 Ma 586791 7691486 (c. 2985 Ma), (c. 3020 Ma), (c. 3150 Ma) D. L. Huston et al., 2002, Economic Geology, v. 97, p. 733Ê755. c. 3013 Ma äò ñOPfo-gg FORESTIER BAY GRANODIORITE: biotite granodiorite and monzogranite, sparsely porphyritic; metamorphosed
(16) 142893 2982 û 5 Ma 421405 7672709 D. R. Nelson, 1999, GSWA Record 1999/2, p. 152Ê156. c. 3014 Ma åä Orpheus Supersuite ñOPmg-gh MOUNT GREGORY MONZODIORITE: massive, medium- to coarse-grained monzodiorite; metamorphosed
(17) N3132 2985 û 7 Ma 484604 7673467 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. G IC A L S c. 3016 Ma åî ñOPre-fdp REA DACITE: quartzÊfeldspar porphyry, rhyolite, and dacite; chiefly intrusive; metamorphosed O U R L V O E (18) 142438 2988 û 4 Ma 486347 7668402 (c. 3014 Ma) D. R. Nelson, 1999, GSWA Record 1999/2, p. 112Ê114. ñOPbl-gm BLACK HILL WELL MONZOGRANITE: E Y c. 3018 Ma èâ weakly foliated monzogranite Department of Geological Survey of G (c. 3050 Ma), (c. 3104Ê3087 Ma), (c. 3184 Ma) (c.3266 Ma) W
(19) 168934 2988 û 7 Ma 507500 7654430 D. R. Nelson, 2001, GSWA Record 2001/2, p. 171Ê172. A E 3021Ê3015 Ma èä åò åè ñOPmw-fdp MOUNT WANGEE DACITE: quartzÊfeldspar porphyry, rhyolite, and dacite; chiefly intrusive; metamorphosed I Industry and Resources L Western Australia S (20) 142657 2990 û 3 Ma 479089 7664705 D. R. Nelson, 1999, GSWA Record 1999/2, p. 115Ê118. T A R NICKOL BAY ñOP-xo-a Gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and minor anorthosite; metamorphosed DATA DIRECTORY E R T (21) 142950 2990 û 5 Ma 579422 7697364 (c. 3009 Ma) D. R. Nelson, 2000, GSWA Record 2000/2, p. 117Ê120. N A U S SHERLOCK BAY ñOP-o (22) 118974 2994 û 2 Ma 465539 7690455 D. R. Nelson, 1997, GSWA Record 1997/2, p. 150Ê153. Gabbro and dolerite; metamorphosed Theme Data Source Data Currency Agency (23) 136826 2995 û 11 Ma 475856 7680534 D. R. Nelson, 1997, GSWA Record 1997/2, p. 158Ê162. ñOPan-xo-a ANDOVER INTRUSION: gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and minor JOHN BOWLER, M.L.A. TIM GRIFFIN (24) 136844 2997 û 3 Ma 471136 7704936 (c. 3106 Ma), (c. 3255 Ma) D. R. Nelson, 1998, GSWA Record 1998/2, p. 105Ê107. anorthosite; metamorphosed Geology GSWA MARÝ 2006 Dept of Industry and Resources MINISTER FOR RESOURCES EXECUTIVE DIRECTOR (25) 168932 3006 û 12 Ma 519190 7664990 (c. 3127 Ma), (c. 3221 Ma), (c. 3279 Ma) D. R. Nelson, 2001, GSWA Record 2001/2, p. 167Ê170. ñOPbu-xo-a BULLOCK HIDE INTRUSION: gabbro, leucogabbro, serpentinized peridotite and dunite, pyroxenite, and minor (26) 141936 3009 û 4 Ma 554448 7682126 (c. 3154Ê3141 Ma) D. R. Nelson, 1998, GSWA Record 1998/2, p. 56Ê58. anorthosite; metamorphosed Structural data WAROX 2002 Dept of Industry and Resources (27) N4128 3012 û 3 Ma 487750 7691320 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. (28) 142832 3012 û 4 Ma 492148 7665331 D. R. Nelson, 2000, GSWA Record 2000/2, p. 66Ê69. Mineral occurrences MINEDEX* NOV 2005 Dept of Industry and Resources (29) JS35(N4350) 3013 û 4 Ma 492070 7667437 J. B. Smith et al., 1998, Precambrian Research, v. 88, p. 143Ê171. (non-confidential) c. 3068 Ma èì ñEHcl-mgt CLIFF POOL TONALITE: weakly foliated to gneissic biotite tonalite; metamorphosed WAMIN NOV 2005 Dept of Industry and Resources (30) N4097 3013 û 8 Ma 486790 7691630 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295.
(31) 118979 3014 û 2 Ma 497076 7693217 D. R. Nelson, 1997, GSWA Record 1997/2, p. 179Ê182. Supersuite PRODUCT OF THE NATIONAL Elizabeth Hill Bouguer Gravity AGSO/GSWA FEB 2004 Australian Geological Survey Organization (32) 118966 3014 û 3 Ma 572550 7705942 D. R. Nelson, 1997, GSWA Record 1997/2, p. 138Ê141. GEOSCIENCE AGREEMENT (33) 127320 3014 û 6 Ma 517037 7687214 (c. 3100 Ma) D. R. Nelson, 1997, GSWA Record 1997/2, p. 183Ê186. Dept of Industry and Resources (34) 136899 3015 û 5 Ma 509020 7712521 (c. 3063Ê3049 Ma), (c. 3178 Ma), (c. 3251 Ma) D. R. Nelson, 1998, GSWA Record 1998/2, p. 120Ê122. REGAL FORMATION: massive and pillowed basalt, with local komatiitic peridotite; 21°00À 21°00À ñre-b (35) 168924 <3016 Ma 587580 7693380 (c. 3127 Ma) D. R. Nelson, 2001, GSWA Record 2001/2, p. 164Ê166. minor chert; metamorphosed Total Magnetic Intensity AGSO/GSWA SEP 2005 Australian Geological Survey Organization SCALE 1:Ý250Ý000 (36) N3188 3016 û 2 Ma 486340 7691950 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. (37) 168936 3016 û 4 Ma 511610 7693320 D. R. Nelson, 2001, GSWA Record 2001/2, p. 178Ê180. Regal Terrane Dept of Industry and Resources 5000 0 5 10 15 20 25 (38) N4028 3017 û 6 Ma 483815 7693043 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. (39) 127327 3018 û 2 Ma 501614 7711232 D. R. Nelson, 1998, GSWA Record 1998/2, p. 136Ê138. Cadastre TENGRAPH* MAR 2004 Dept of Industry and Resources Metres Kilometres (40) 142830 3018 û 3 Ma 516986 7686774 D. R. Nelson, 1998, GSWA Record 1998/2, p. 63Ê65. UNIVERSAL TRANSVERSE MERCATOR PROJECTION (41) 142430 3018 û 19 Ma 507940 7691525 (c. 2970 Ma) D. R. Nelson, 1999, GSWA Record 1999/2, p. 108Ê111. Topographic nomenclature GEONOMA 2005 Dept of Land Information HORIZONTAL DATUM: GEOCENTRIC DATUM OF AUSTRALIA 1994 (42) 144224 3021 û 3 Ma 519893 7709130 D. R. Nelson, 1999, GSWA Record 1999/2, p. 157Ê159. (43) 127330 3022 û 12 Ma 502453 7715689 (c. 3058 Ma), (c. 3287 Ma), (c. 3461 Ma) D. R. Nelson, 1998, GSWA Record 1998/2, p. 52Ê55. Topography DLI and GSWA field survey 2004 Dept of Land Information VERTICAL DATUM: AUSTRALIAN HEIGHT DATUM (44) 118976 3023 û 9 Ma 495747 7690542 (c. 3129 Ma) D. R. Nelson, 1997, GSWA Record 1997/2, p. 175Ê178. Grid lines indicate 20Ý000 metre interval of the Map Grid Australia Zone 50 (45) JS25 3024 û 4 Ma 494944 7689462 J. B. Smith et al., 1998, Precambrian Research, v. 88, p. 143Ê171. * GSWA and DoIR databses can be viewed online (www.doir.wa.gov.au/aboutus/geoviewÝÊ launch.asp) or can be downloaded from the (46) 142661 3068 û 4 Ma 486599 7661905 (c. 3095 Ma), (c. 3169Ê3149 Ma) D. R. Nelson, 1998, GSWA Record 1998/2, p. 96Ê98. ñWH-mba ñWH-mus GSWA Data and Software Centre (www.doir.wa.gov.au/GSWA/downloadcentre) The Map Grid Australia (MGA) is based on the Geocentric Datum of Australia 1994 (GDA94) (47) 118965 3093 û 4 Ma 562407 7692425 D. R. Nelson, 1997, GSWA Record 1997/2, p. 171Ê174. GDA94 positions are compatible within one m (48) W197 3112 û 6 Ma 497300 7685900 R. C. Horwitz and R. T. Pidgeon, 1993, Precambrian Research, v. 60, p. 175Ê183. etre of the datum WGS84 positions ñWH-mba GEOCENTRIC DATUM OF AUSTRALIA (49) JS20(N4201) 3114 û 5 Ma 483556 7689663 J. B. Smith et al., 1998, Precambrian Research, v. 88, p. 143Ê171. Amphibolite derived from basalt Gneissic metamonzogranite; locally migmatitic and veined by younger granitic rocks; (50) JS33(N4332) 3114 û 5 Ma 489626 7665832 J. B. Smith et al., 1998, Precambrian Research, v. 88, p. 143Ê171. ñWH-mus c. 3093 Ma èî ñRA-mgmn Ultramafic schist locally contains large mafic and ultramafic xenoliths Compiled by A. H. Hickman 2005 (51) 114305 3115 û 5 Ma 501583 7686300 D. R. Nelson, 1996, GSWA Record 1996/5, p. 160Ê163. (52) 144210 3116 û 3 Ma 548490 7686138 D. R. Nelson, 1998, GSWA Record 1998/2, p. 117Ê119. Geology by A. H. Hickman 1996Ê99, R. H. Smithies 1996Ê99, C. A. Strong 1997Ê98, WOODBROOK FORMATION: rhyolitic tuff and agglomerate; minor basalt and rare (53) 127378 3117 û 3 Ma 508890 7686913 D. R. Nelson, 1998, GSWA Record 1996/2, p. 111Ê113. c. 3117 Ma êå ñWHw-f C. J. Kojan 1997Ê98, and G. Pike 1999Ê2000 (54) 144256 3118 û 2 Ma 535179 7688293 D. R. Nelson, 1998, GSWA Record 1998/2, p. 114Ê116. thin banded iron-formation; metamorphosed 3123Ê3114 Ma êî èò ñRAtw-gf TWIN TABLE MONZOGRANITE: monzogranite and alkaliÊfeldspar granite; metamorphosed (55) 114356 3118 û 3 Ma 492602 7683255 D. R. Nelson, 1996, GSWA Record 1996/5, p. 156Ê159. GSWA geochronology data are available online at www.doir.wa.gov.au/aboutus/geoviewÊ Ýlaunch.asp 21°30À 21°30À (56) 114358 3122 û 7 Ma 492055 7678459 D. R. Nelson, 1997, GSWA Record 1997/2, p. 134Ê137. BRADLEY BASALT: or on disk 116°00À 116°30À 117°00À 117°30À 118°00À pillow basalt, massive basalt, dolerite sills, and minor felsic Sholl Terrane (57) N4413 3123 û 2 Ma 483637 7698171 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. c. 3115 Ma êâ Whundo Group ñWHb-b tuff, sandstone, shale, and chert; metamorphosed Railway Supersuite (58) 114350 3125 û 4 Ma 491706 7685038 (c. 3449 Ma) D. R. Nelson, 1996, GSWA Record 1996/5, p. 164Ê167. Gravity data processed by J. Watt PINNACLE HILL GNEISS: banded tonalite to granodiorite gneiss with xenoliths of amphibolite (59) N4357 3126 û 4 Ma 491236 7669357 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. 3130Ê3114 Ma ìâ êô ñRApi-mgtn Aeromagnetic data processed by J. Watt SCALE 1:1Ý000Ý000 TOZER FORMATION: basalt, and dacitic to rhyolitic lava and pyroclastic rocks; facies mafic gneiss, and sheets of leucocratic gneiss West Pilbara Superterrane (60) N4325 3128 û 4 Ma 492917 7678874 J. B. Smith, 2003, Chemical Geology, v. 194, p. 275Ê295. 3128Ê3118 Ma ìô êò êì êê êè ñWHt-xb-f 0 10 20 30 40 50 (61) 142835 3130 û 4 Ma 490150 7663950 (c. 3149 Ma) D. R. Nelson, 1999, GSWA Record 1999/2, p. 119Ê121. variable silicification and carbonate alteration; metamorphosed Edited by C. Strong, G. Hall, and N. Tetlaw GEOLOGICAL SURVEY OF WESTERN AUSTRALIA Kilometres (62) 142535 3236 û 3 Ma 448628 7634826 D. R. Nelson, 1998, GSWA Record 1998/2, p. 93Ê95. Cartography by P. Backhouse, A. Francois, P. Taylor, and K. Greenberg (63) 118975 3251 û 6 Ma 475039 7698055 D. R. Nelson, 1997, GSWA Record 1997/2, p. 154Ê157. NALLANA FORMATION: metabasalt, with minor metamorphosed ultramafic, felsic, c. 3125 Ma êð ñWHn-b REPORT 92 PLATE 1 (64) JS17(N4179) 3261 û 4 Ma 484659 7696864 (