W I L D E Department of Mineral and Petroleum Resources RECORD JIMPERDING AND CHITTERING 2001/12 METAMORPHIC BELTS, SOUTHWESTERN J YILGARN CRATON, WESTERN AUSTRALIA i m p — A FIELD GUIDE e r d i n g by S. A. Wilde a n d C h i t TTHH t W e r e i n s g t e 4 M r I n A e S A t a u E m s X 44 t o C r r a U p INTERNATIONAL l INTERNATIONAL R h i a i S c — I O B N e AARRCCHHAAEEAANN a l G t f s U i , e I s l D d SYMPOSIUM o SYMPOSIUM E u g t u h i w d e e s t e r n Y i l g a r n 4th International Archaean Symposium C r a t o n , Further details of geological publications and maps produced by the Geological Survey of Western Australia can be obtained by contacting: R E Information Centre C O Department of Mineral and Petroleum Resources R D 100 Plain Street 2 0 East Perth WA 6004 0 1 Geological Survey of Western Australia / Phone: (08) 9222 3459 Fax: (08) 9222 3444 1 www.dme.wa.gov.au 2 GEOLOGICAL SURVEY OF WESTERN AUSTRALIA Record 2001/12 JIMPERDING AND CHITTERING METAMORPHIC BELTS, SOUTHWESTERN YILGARN CRATON, WESTERN AUSTRALIA — A FIELD GUIDE by S. A. Wilde1 1 Curtin University of Technology, Western Australia Perth 2001 MINISTER FOR STATE DEVELOPMENT Hon. Clive Brown MLA DIRECTOR GENERAL DEPARTMENT OF MINERAL AND PETROLEUM RESOURCES Jim Limerick DIRECTOR, GEOLOGICAL SURVEY OF WESTERN AUSTRALIA Tim Griffin Notice to users of this guide: This field guide is one of a series published by the Geological Survey of Western Australia (GSWA) for excursions conducted as part of the 4th International Archaean Symposium, held in Perth on 24–28 September 2001. Authorship of these guides included contributors from AGSO, CSIRO, tertiary academic institutions, and mineral exploration companies, as well as GSWA. Editing of manuscripts was restricted to bringing them into GSWA house style. The scientific content of each guide, and the drafting of the figures, was the responsibility of the authors. REFERENCE The recommended reference for this publication is: WILDE, S. A., 2001, Jimperding and Chittering Metamorphic Belts, southwestern Yilgarn Craton, Western Australia — a field guide: Western Australia Geological Survey, Record 2001/12, 24p. National Library of Australia Card Number and ISBN 0 7307 5700 5 Grid references in this publication refer to the Australian Geodetic Datum 1984 (AGD84). Locations mentioned in the text are referenced using Australian Map Grid (AMG) coordinates, Zone 50. All locations are quoted to at least the nearest 100 m. Printed by Image Source, Perth, Western Australia Published 2001 by Geological Survey of Western Australia Copies available from: Information Centre Department of Mineral and Petroleum Resources 100 Plain Street EAST PERTH, WESTERN AUSTRALIA 6004 Telephone: (08) 9222 3459 Facsimile: (08) 9222 3444 This and other publications of the Geological Survey of Western Australia are available online through dme.bookshop at www.dme.wa.gov.au ii Contents Introduction ...................................................................................................................................................................... 1 Geological setting ............................................................................................................................................................ 1 Crustal evolution of the southwestern Yilgarn Craton ............................................................................................. 1 The Yilgarn Craton ................................................................................................................................................... 1 Southwestern Yilgarn Craton ............................................................................................................................. 2 Major geological units .................................................................................................................................. 2 Terrane model .............................................................................................................................................. 2 Geochronology of the southwestern Yilgarn Craton ................................................................................................ 5 Overview ............................................................................................................................................................ 5 Recent geochronological data ............................................................................................................................ 8 Terrane geology ........................................................................................................................................................ 9 Balingup Terrane ............................................................................................................................................... 9 Boddington Terrane ......................................................................................................................................... 10 Lake Grace Terrane ......................................................................................................................................... 12 Murchison Terrane ........................................................................................................................................... 13 Terrane assembly .................................................................................................................................................... 13 Excursion localities ........................................................................................................................................................ 16 Balingup Terrane ..................................................................................................................................................... 16 Chittering Metamorphic Belt ........................................................................................................................... 16 Locality 1: Kyanite schist, South Chittering .............................................................................................. 16 Locality 2: Granofels, Chittering Lake ...................................................................................................... 16 Boddington Terrane ................................................................................................................................................ 18 Jimperding Metamorphic Belt ......................................................................................................................... 18 Locality 3: Windmill Hill railway cutting, Toodyay ................................................................................. 18 Locality 4: Poison Creek, Toodyay ............................................................................................................ 19 Locality 5: Andalusite schist, Lovers Lane ................................................................................................ 19 Locality 6: Morangup Greenstone Belt, Morangup Hill ............................................................................ 19 Locality 7: Mountain Quarry, Boya ........................................................................................................... 20 Acknowledgements ........................................................................................................................................................ 21 References ...................................................................................................................................................................... 22 Figures 1. Regional geology of the southwestern Yilgarn Craton, showing location of the geophysical traverse line ............................................................................................................................................................ 3 2. Line diagram of major reflection events from the deep seismic traverse, simplified to show the preferred interpretation of the deep seismic data ............................................................................................. 4 3. Terranes of the southwestern Yilgarn Craton ........................................................................................................ 6 4. Simplified geological map of the PERTH 1:250 000 sheet, showing the excursion localities .............................. 17 Tables 1. Characteristic features of the Balingup, Boddington, and Lake Grace Terranes ..................................................7 2. Timing of major Archaean events in the southwestern Yilgarn Craton within the Balingup, Boddington, Lake Grace, and Murchison Terranes ............................................................................................ 15 iii Record 2001/12 Jimperding and Chittering Metamorphic Belts Excursion Age (Ma) 0 PHANEROZOIC Bonaparte Basin NEOPROTEROZOIC 1000 MESOPROTEROZOIC KING LEOPOLD Kimberley and OROGEN Speewah Basins 2000 Igneous and PALAEOPROTEROZOIC metamorphic rocks Sedimentary and volcanic rocks Hooper Complex 3000 ARCHAEAN Ord greenstones – Basin and gneisses 4000 Granite Birrindudu HALLS CREEK OROGEN Basin Northern Carnarvon Lamboo Complex Basin Granites– Tanami Canning Basin Complex North Pilbara Terrain Yeneena Basin Northern Carnarvon P Basin P I L B A R A C R A T O N A CENTRALIAN T SUPERBASIN E R ARUNTA S OROGEN Hamersley Basin O Rudall Complex N Ashburton Basin O R O G E C Officer Basin N A P Amadeus R Edmund Basin I Basin C O Southern Carnarvon