Mineral Resources Tasmania Tasmanian Geological Survey Tasmania DEPARTMENT of INFRASTRUCTURE, Record 2005/05 ENERGY and RESOURCES Additional map compilation and review of existing maps in western Tasmania Michael Vicary CONTENTS Introduction ……………………………………………………………………………… 1 Acknowledgements………………………………………………………………………… 1 New map compilations …………………………………………………………………… 3 Other revised map sheets …………………………………………………………………… 8 Extra modifications to maps revised by Corbett ……………………………………………… 10 Conclusion………………………………………………………………………………… 12 References ………………………………………………………………………………… 12 Introduction 1. Standardisation of rock code mnemonics. 2. Standardisation of legend and responsibility This report documents the final phase of a project format. within the Western Tasmanian Regional Minerals Program (WTRMP) to update the geology of the 3. Reappraisal of rock unit colours. Mount Read Volcanics belt using the new WTRMP It is hoped that these changes will greatly assist the geophysical data and additional geological data from user and aid in interpretation and readability. other available sources. It supplements work commenced by Dr Keith Corbett on the reappraisal of Modifications to the MRT 1:250 000 and 1:500 000 scale the stratigraphic subdivisions of the Mount Read geological maps have been made to accommodate the Volcanics and Owen Group and correlates in western revisions to the 1:25 000 scale series. and northwestern Tasmania. All grid coordinates are referenced to AGD66 – AMG Zone 55. Figure 1 shows the distribution of the 1:25 000 scale geological map sheets reviewed and/or compiled as part of the WTRMP. These maps essentially cover all Ac knowl edg ments the areas of the Cambrian Mt Read Volcanics and/or The author wishes to acknowledge the enormous Cambrian to Ordovician Owen Group in western and contributions that Dr Keith Corbett and Mr Chris northern Tasmania and in the Adamsfield area. Map Meech made to this part of the WTRMP Project. Mrs sheets revised by Corbett have been documented in the Amanda Mayne and Ms Joanne Bowerman are following reports and maps (Corbett, 2002a,b,c; sincerely thanked for their superb cartographic efforts. Corbett, 2003a,b; Corbett, 2004; Corbett and Dr David Seymour, Dr Marcus McClengahan, Mr McClenaghan, 2003). Steve Forsyth, Mr John Everard, Dr Clive Calver and Dr David Green provided valuable professional and Thirty-two new maps were compiled and an technical advice. The support of Dr Geoff Green, Dr additional 23 existing maps were revised by this Tony Brown and Mr Ken Bird has been greatly author. Significant geological revisions to these map appreciated. sheets are documented below. In addition, a number of significant changes have been made to the final map sheets, including those reviewed by Corbett. These include: Tasmanian Geological Survey Record 2005/05 1 WICKHAM SISTER NEW YEAR EGG LAGOON PALANA ARTHURS REEKARA SALTWATER TANNER WINGAROO PATRIARCHS LOORANA SEA ELEPHANT EMITA MEMANA SELLARS CURRIE NARACOOPA Compiled and revised MJV WYBALENNA LEVENTHORPE REEF WHITEMARK LOGAN PEARSHAPE GRASSY Revised MJV CHAPPELL LOCCOTA FISHER STOKES Revised KDC BADGER ANDERSON PUNCHEON KERAUDREN ROCHON BARRETTS KERFORD THIRSTY Other existing maps as at 4 February 2005 ADAMSON CUVIER PRESERVATION PASSAGE BIRD WALKER MORIARTY GRIM ROBBINS MONTAGU STANLEY STUDLAND LYME REGIS SMITHTON CAMERON MELLA ROCKY CAPE WATERHOUSE TOMAHAWK MUSSELROE NATURALISTE MARRAWAH EAST LILEAH & WEST (2 MAPS) TOGARI MAWBANNA WYNYARD TAM O'SHANTER BRIDPORT OXBERRY MONARCH GLADSTONE EDDYSTONE TAYATEA BLUFF ROGER MILABENA CALDER BURNIE LOW HEAD WEYMOUTH BOWOOD PEARLY BROOK PIONEER LANKA ANSONS BAY PORT SORELL (NORTH & SOUTH) SUNDOWN SUMAC HOLDER FOLLY YOLLA STOWPORT ULVERSTONE DEVONPORT 2 MAPS BELL BAY RETREAT NABOWLA SCOTTSDALE DERBY SPURRS RIVULET THE GARDENS BERYL TEMMA DEMPSTER KEITH TEWKESBURY RIANA KINDRED LATROBE HARFORD BEACONSFIELD LILYDALE LISLE SPRINGFIELD RINGAROOMA BLUE TIER BINALONG BERTHA ORDNANCE BALFOUR BARETOP PARRAWE LOYETEA CASTRA RAILTON W FRANKFORD EXETER DILSTON PATERSONIA MAURICE VICTORIA PYENGANA ST HELENS DONALDSON KENNETH LILY WARATAH GUILDFORD LOONGANA WILMOT SHEFFIELD PARKHAM BRIDGENORTH LAUNCESTON NUNAMARA BEN NEVIS SADDLEBACK BRILLIANT BEAUMARIS SAVAGE RIVER JOHNSONS LAGOON LUINA PEARSE LEA CETHANA GOG DELORAINE WESTBURY PROSPECT BLESSINGTON GIBLIN MATHINNA DUBLIN TOWN FALMOUTH MEREDITH INTERVIEW RAMSAY CHARTER PENCIL PINE LIENA MOLE CREEK MONTANA CLUAN LONGFORD EVANDALE STACKS MANGANA ST MARYS IRONHOUSE LIVINGSTONE HARDWICKE PARSONS BLOCK CRADLE BORRADAILE LAKE MACKENZIE QUAMBY BLUFF LIFFEY CRESSY NILE STANHOPE ROSSARDEN FINGAL PICCANINNY STRINGER AHRBERG ROSEBERY TULLAH WILL ROWALLAN PILLANS BREONA POATINA DELMONT CLEVELAND HANLETH ST PAULS DOME ST JOHN SEYMOUR HEEMSKIRK EAST & WEST (2 MAPS) DUNDAS SELINA ACHILLES CATHEDRAL ADA SPLIT ROCK BRADYS LO O'CONNORS CONARA DIAMOND ROYS HENRY BICHENO TRIAL OCEANA TYNDALL DOME DU CANE OLIVE MIENA ARTHURS LAKE MILLERS JACOBS CAMPBELL TOWN SNOW APSLAWN LODI MALLANNA PROFESSOR GORMANSTON GOULDS OLYMPUS INA MONPEELYATA WIHAREJA PENNY ELLINTHORP ROSS LEAKE CRANBROOK FRIENDLY STRAHAN EAST & OWEN WEST (2 MAPS) COLLINGWOOD RUFUS BRONTE WADDAMANA STEPPES INTERLAKEN TUNBRIDGE MORRISTON COLONELS SWANSEA COLES BAY KELLY LISDILLON TEEPOOKANA DARWIN LODDON ARROWSMITH D?ARCYS ECHO HERMITAGE TABLE VINCENTS FADDENS TOOMS GRAHAM TABLE HEAD MAYFIELD PHILIPS ENGINEER VERA MAJORS TARRALEAH DEE CLUNY DENNISTOUN OATLANDS LEMONT ROYALTY SCHOUTEN ALBINA GRINDSTONE SARAH McCALL WARNES ALGONKIAN WAYATINAH STRICKLAND CAWOOD BOTHWELL STONOR WHITEFOORD RAVENSDALE VARNA LIMEKILN KEMPTON COLEBROOK BOUGANVILLE BIRCHS ABEL SPIRES WYLDS OUSE MONTACUTE WOODSDALE TRIABUNNA HIBBS E & W D'AGUILAR ELDERSLIE BAINS BUCKLAND DARLINGTON (2 maps) LANCELOT POKANA GORDONVALE ELLENDALE HAMILTON ORFORD ENDEAVOUR E & W (2 maps) INNES OLEGAS WINGS TIGER DOBSON BUSHY PARK BROADMARSH TEA TREE RUNNYMEDE SANDSPIT RIEDLE MOORES STRATHGORDON NEW NORFOLK RICHMOND SORELL PERON MONTGOMERY SERPENTINE ADAMSFIELD MAYDENA UXBRIDGE KELLEVIE MAINWARING OSMUND VIEW McPARTLAN BOWES SKELETON LLOYD COLLINSVALE HOBART CARLTON DUNALLEY VERIDIAN MURDUNNA NORTH & LEWIS ROOKERY SOLITARY ANNE NEVADA LONNAVALE LONGLEY TAROONA CREMORNE SOUTH (2 MAPS) KOONYA ELLIOTT PROPSTING MACONOCHIE SCOTTS WELD GLEN HUON HUONVILLE BLACKMANS BAY COMMUNICATION TARANNA CYGNET PORT ARTHUR HIPPOLYTE MULCAHY DAVEY CROSSING RAZORBACK PICTON GEEVESTON BARNES LYMINGTON GREAT BAY RAOUL TASMAN SETTLEMENT LEGGE GLOVERS BURGESS WATERLOO BOBS RAMINEA DOVER ADVENTURE BAY BREAKSEA RUGBY FEDERATION BISDEE HASTINGS PARTRIDGE FLUTED CAPE HILLIARD MEL RAY COX LOUISA PRECIPITOUS LEPRENA CLOUDY TELOPEA DE WITT PRION RECHERCHE u:\urep\2005_05\map_index_25.cdr Figure 1 1:25 000 scale geological maps updated as part of the Western Tasmanian Regional Minerals Program. Tasmanian Geological Survey Record 2005/05 2 New map compilations Ahberg produced in May, 2005. Explanatory notes are in preparation. 1. The compilation was largely based on original mapping by Brown et al. (1994), Turner et al. (1991) Cluan and Gee et al. (1969). 1. The compilation was largely based on Barton et al. 2. Modification to the Proterozoic geology at the (1969) with additional information from Matthews southern end of the Arthur Lineament was based (1983). on the interpretation of WTRMP aeromagnetic data. 2. Additional changes to the eastern edge of the map sheet will be required once the recent remapping of Bridgenorth the Longford map sheet (Forsyth, in prep.) has been compiled. 1. The compilation was largely based on Gulline et al. (1973). Collingwood 2. Several air photo and magnetic lineaments have 1. The compilation was largely based on Calver et al. been added to the map. These are typically (1987) and Gulline et al. (1963). post-Jurassic in age, but they could represent reactivated older basement structures. 2. Some modification to the Quaternary geology in the Alma River–Cardigan Flats–Cheyne Range 3. The Owen Group stratigraphy has been revised areas has been made and is largely based on air following Laurie (1996). photo interpretation. Burnie 3. The Proterozoic and Lower Palaeozoic geology is unmodified from original source material. 1. The compilation was largely based on Gee et al. (1967) and Burns (1963). Cra dle 2. Point Tertiary basalt locations are from the MRT 1. The compilation was largely based on Barton et al. geochemistry database (J. Everard, pers. comm.). (1966) and Jennings and Burns (1958). 3. The location of pillow basalt within the Burnie 2. The Permian stratigraphy was recompiled from Formation at Sulphur Creek was taken from Burns Gee and Burns (1968). (1964). 3. The distribution of Cambrian Mt Read Volcanics in Cas tra the Sumer Spur area was taken from Vicary and Pemberton (1988). 1. The compilation was largely based on Burns (1963) 4. Revisions to the Pleistocene deposits in the Cradle and Jennings et al. (1959). Mountain–Waterfall Valley area were based on air 2. The Cambrian geology has been updated from the photo interpretation with additional information original sources with additional information form from Derbyshire (1968). Vicary (1995), Vivian (1984), Corbett (2003b), 5. Minor revision was made to the Proterozoic Poltock (2002) and additional air photo and geology in the Hounslow Heath area, based on WTRMP geophysics interpretation. additional information presented in Collins et al. 3. The dominant Cambrian sequence in the Castra (1981). area has been correlated with the Western Volcano-sedimentary Sequence (Corbett, 2003b). Deloraine 4. Tyndall