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Interpreted Bedrock Geology of the Northwestern Pilbara Craton

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Interpreted Bedrock Geology of the Northwestern Pilbara Craton 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
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