1887
Volume 24, Issue 2
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

Recent ideas on the structural development of the Lachlan Orogen have interpreted fold and fault geometry in terms of thrust and strike-slip tectonics, in which steep surface faults shallow with depth to sole into subhorizontal detachments in the upper and middle crust. This concept of thin-skinned tectonics has provided a new framework for the generation of terrane models in the orogen involving translation and possible rotation of crustal blocks. These conceptual models should be tested, with palaeomagnetism being potentially the best tool with which to do this. Previous palaeomagnetic work in the Lachlan Orogen has, however, highlighted several barriers to obtaining successful palaeomagnetic results. Problems caused by late Palaeozoic and Mesozoic overprints, multiple deformation, uncertainty about deformation ages, and uncertainty about the Australian Apparent Polar Wander Path all need to be overcome before models of terrane accretion, some of which are described here, can be successfully tested.

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1993-06-01
2026-01-13

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References

  1. Beck, Jr., M.E., (1980), ‘Paleomagnetic record of plate-margin tectonic processes along the western edge of North America’. J. Geophys. Res., 85, 7115–7131.
  2. Bischoff, G.C.O., and Prendergast, E.I., (1987), ‘Newly-discovered Middle and Late Cambrian fossils from the Wagonga Beds of New South Wales, Australia’. N. Jb. Geol. Paläont. Abh., 175, 39–64.
  3. Brown, I.A., (1933), ‘The geology of the south coast of New South Wales, with special reference to the origin and relationships of the igneous rocks’. J. Proc. Roy. Soc., N.S.W., 58, 334–362.
  4. Cas, R.A.F., Powell, C.McA., and Crook, K.A.W., (1980), ‘Ordovician palaeogeography of the Lachlan Fold Belt: a modern analogue and tectonic constraints’. J. Geol. Soc. Aust., 27, 19–32.
  5. Coney, P.J., Edwards, A., Hine, R., Morrison, F., and Windrim, D., (1990), ‘The regional tectonics of the Tasman orogenic system, eastern Australia’, pp 519–543, in, Grady, A.E., James, P.R., Parker, A.J., and Platt, J.P., (Eds.), Australasian Tectonics. J. Struct. Geol., 12.
  6. Cooper, R.A., and Tulloch, A.J., (1992), ‘Early Palaeozoic terranes in New Zealand and their relationship to the Lachlan Fold Belt’, pp 129–144, in, Fergusson, C.L. and Glen, R.A., (Eds.), The Palaeozoic eastern margin of Gondwanaiand: Tectonics of the Lachlan Fold belt of eastern Australia and related orogens. Tectonophysics, 214.
  7. Cox, S.F., Etheridge, M.A., Cas, R.A.F., and Clifford, B.A., (1991), ‘Deformational style of the Castlemaine area, Bendigo-Ballarat Zone: Implications for evolution of crustal structure in central Victoria’. Aust J. Earth Sci., 38, 151–170.
  8. Embleton, B.J.J., McElhinny, M.J., Crawford, A.R., and Luck, G.R., (1974), ‘Palaeomagnetism and the tectonic evolution of the Tasman Orogenic Zone’. J. Geol. Soc. Aust., 21, 187–194.
  9. Etheridge, M.A., Ransom, D.M., Williams, P.F., and Wilson, C.J.L., (1973), ‘Structural evidence of the age of folded rocks on the south coast of New South Wales’. J. Geol. Soc. Aust., 19, 465–470.
  10. Fergusson, C.L., Gray, D.R. and Cas, R.A.F., (1986), ‘Overthrust terranes in the Lachlan Fold Belt, southeastern Australia’. Geology, 14, 519–522.
  11. Glen, R.A., (1985), ‘Basement control on the deformation of cover basins: an example from the Cobar district in the Lachlan Fold Belt, Australia’, pp 301–314, in, Hancock. P.L. and Powell, C. McA., (Eds.), Multiple Deformation in Ductile and Brittle Rocks. J. Struct. Geol., 7.
  12. Glen, R.A., (1992), ‘Thrust, extensional and strike-slip tectonics in an evolving Palaeozoic orogen — a structural synthesis of the Lachlan Orogen of southeastern Australia’, pp 341–380, in, Fergusson, C.L. and Glen, R.A. (Eds.), The Palaeozoic eastern margin of Gondwanaland: Tectonics of the Lachlan Fold belt of eastern Australia and related orogens. Tectonophysics, 214.
  13. Glen, R.A., and VandenBerg, A.H.M., (1987), ‘Thin-skinned tectonics in part of the Lachlan Fold Belt near Delegate, southeastern Australia: Geology, 15, 1070–1073.
  14. Glen, R.A., Dallmeyer, R.D., and Black, L.P., (1992a), ‘Isotopic dating of basin inversion — the Palaeozoic Cobar Basin, Lachlan Orogen, Australia’, pp 249–268, in, Fergusson, C.L. and Glen, R.A., (Eds.), The Palaeozoic eastern margin of Gondwanaland: Tectonics of the Lachlan Fold belt of eastern Australia and related orogens. Tectonophysics, 214.
  15. Glen, R.A., Drummond, B.D., Goleby, B.R., Palmer, D., and Wake-Dyster, K.D., (1992b), ‘Deep seismic of the Cobar Basin-I: Structure and implications for mineral prospectivity’. Geol. Soc. Aust. Abstr., 32, 43.
  16. Glen, R.A., Scheibner, E., and VandenBerg., A.H.M., (1992c), ‘Paleozoic intraplate escape tectonics in Gondwanaiand and major strike-slip duplication in the Lachlan Orogen of southeastern Australia’. Geology, 20, 795–798.
  17. Goleby, B.R., (1980), ‘Early Palaeozoic palaeomagnetism in south eastern Australia’. J. Geomag.Geoelect. supplement III, 32, 11–21.
  18. Gray, D.R., and Willman, C.E., (1991), ‘Deformation in the Ballarat Slate Belt, central Victoria, and implications for crustal structure across southeast Australia’. Aust. J. Earth Sci., 38, 171–201.
  19. Gray, D.R., Wilson, C.J.L., and Barton, T.J., (1991), ‘Intracrustal detachments and implications for crustal evolution within the Lachlan Fold Belt, southeastern Australia’. Geology, 19, 574–577.
  20. Hagstrum, J.T., (1993), ‘North American Jurassic APW: the current dilemma. EOS (Transactions American Geophysical Union), 74, 65,66, 68–69.
  21. Jenkins, C.J., Kidd, P.R., and Mills, K.J., (1982), ‘Upper Ordovician graptolites from the Wagonga Beds near Batemans Bay, New South Wales’. J. Geol. Soc. Aust., 29, 367–373.
  22. Jones, D.L., Howell, D.J., Coney, P.J., and Monger, J.W.H., (1983), ‘Recognition, character and analysis of tectonostratigraphic terranes in western North America’, pp, 21–35, in, Hashimoto, M. and Uyeda, S., (Eds.), Accretion Tectonics in Circum-Pacific regions, Terra, Tokyo.
  23. Klootwijk, C., (1988), ‘Palaeomagnetism, pp 25-30, in, Finlayson, D.M., (Ed.), Eromanga-Brisbane Geoscience Transect. BMR Record, 1988/10.
  24. Klootwijk, C., (1991), pp 88–90, in, Abell, R.S., Geology of the Canberra 1:100 000 sheet area, New South Wales and Australian Capital Territory. BMR Bulletin, 233.
  25. Klootwijk, C., and Giddings, J., (1993a), ‘Palaeomagnetic results of Upper Palaeozoic volcanics, northeastern Queensland, and Australia’s Late Palaeozoic APWP. pp 617–627, in, Flood, P.G. and Aitchison, J.G., (Eds.), New England Orogen 1993, eastern Australia, University of New England, Armidale.
  26. Klootwijk, C. and Giddings, J., (1993b), ‘The dilemma of Australia’s Late Palaeozoic pole path: Y-front or G-string’, pp 35–39 in Klootwijk, C. (compiler), Palaeomagnetism in Australia: dating, tectonic and environmental applications. AGSO Record, 1993/20.
  27. Lackie, M.A., and Schmidt, P.W., (1993), ‘Remagnetisation of Strata during the Hunter-Bowen Orogeny’, this volume.
  28. Leitch, E.C. and Scheibner, E., (1987), ‘Stratotectonic terranes of the eastern Australian Tasmanides’. pp 1–19, in, Leitch, E.C. and Scheibner, E., (Eds.), Terrane Accretion and Orogenic Belts. Am. Geophys. Union, Geodynamics Series, 19.
  29. Lewis, PC., and Glen, R.A., (1991), ‘Bega-Mallacoota 1:250 000 geological map. Geol. Surv. NSW., Sydney.
  30. Li, Z.X., (1993), ‘A new palaoemagnetic quality filter: implications for Gondwanan Palaeozoic Apparent Polar Wander path’, pp 33–34, in, Klootwijk, C. (compiler), Palaeomagnetism in Australia: dating, tectonic and environmental applications. AGSO Record, 1993/20,.
  31. Li, Z.X., Powell, C.McA., Thrupp, G.A., and Schmidt, P.W., (1990), ‘Australian Palaeozoic palaeomagnetism and tectonics-ll. A revised apparaent polar wander path and palaeogeography’. pp 567–575, in, Grady, A.E., James, P.R., Parker, A.J. and Platt, J.P., (Eds.), Australasian Tectonics. J. Struct. Geol, 12.
  32. Li, Z.X., Chen, Z., and Powell, C.McA., (1993), ‘New Late Palaeozoic palaeomagnetic results from Australia and revision of the Gondwanan Apparent Polar Wander Path, this volume.
  33. McElhinny, M.J., and Embleton, B.J.J., (1974), ‘Australian palaeomagnetism and the Phanerozoic plate tectonics of eastern Gondwanaiand. Tectonophysics, 22, 1–29.
  34. Morand, V.J., and Gray, D.R., (1991), ‘Major fault zones related to the Omeo Metamorphic Complex, northeastern Victoria’. Aust. J. Earth Sci., 38, 203–221.
  35. Morel, P. and Irving, E., (1978), ‘Tentative paleocontinental maps for the Early Phanerozoic and Proterozoic’. J. Geol., 86, 535–561.
  36. Oversby, B., (1971), ‘Palaeozoic plate tectonics in the southern Tasman Geosyncline’. Nature, Physical Sciences, 234, 45–48.
  37. Owen, M., and Wyborn, D., (1979), ‘Geology and geochemistry of the Tantangara and Brindabella 1:100,000 Sheet areas, BMR Bulletin, 204, pp52.
  38. Packham G.H., (1987), ‘The eastern Lachlan Fold Belt of southeastern Australia: A possible Late Ordovician to Early Devonian sinistral strike-slip regime’, pp 67–82, in, Leitch, E.C. and Scheibner, E. (Eds), Terrane Accretion and Orogenic Belts. American Geophysical Union, Geodynamic Series, 19.
  39. Powell, C.McA., (1983), ‘Geology of N.S.W., South Coast’. Geol. Soc. Austr. SGTSG Field Guide, 1, pp118.
  40. Powell, C.McA., (1984), ‘Uluru and Adelaide Regimes (f) Ordovician to earliest Silurian marginal sea and Island arc’, pp 290–303, in, Veevers, J.J. (Ed.), Phanerozoic Earth History of Australia, Oxford University Press.
  41. Powell, C.McA., Baillle, P.W., Conaghan, P.J., and Turner, N.J., (1993), ‘The mid-Palaeozoic turbiditic Mathinna Group, northern Tasmania’. Aust. J. Earth Sci., 40, 169–196.
  42. Powell, C.McA., Li, Z.X., Thrupp, G.A., and Schmidt, P.W., (1990), ‘Australian Palaeozoic palaeomagnetism and tectonics-l. Tectonostratigraphic terrane constraints from the Tasman Fold Belt’, pp 553–565, in, Grady, A.E., James, P.R., Parker, A.J., and Platt, J.P., (Ed.), Australasian Tectonics. J. Struct. Geol.12.
  43. Powell, C.McA., Li, Z.X., and McElhinny, M. W., (1993), ‘Palaeomagnetic tests of tectonic models of the Tasman Fold Belt during the Neoproterozoic and Palaeozoic’, this volume.
  44. Ron, H., Aydin, A., and Nur, A., (1986), ‘Strike-slip faulting and block rotation in the Lake Mead fault system’ Geology, 14, 1020–1023.
  45. Scheibner, E., (1972). ‘Geology of the Taralga 1:100,000 Geological Sheet 8829’. Geol. Surv. N.S.W., Sydney.
  46. Scheibner, E., (1973), ‘A plate tectonic model of the Palaeozoic history of New South Wales. J. Geol. Soc. Aust., 20, 405–426.
  47. Scheibner, E., (1985), ‘Suspect terranes in the Tasman Fold Belt System’, pp 493–514, in, Howell, D.G., (Ed.), Tectonostratigraphic Terranes in the Circum-Pacific Region. Circum-Pacific Council for Energy and Mineral Resources Earth Science Series, 1.
  48. Scheibner, E., (1989), ‘The tectonics of New South Wales in the second decade of application of the plate tectonic paradigm’. J. Proc. Roy. Soc. NSW., 122, 35–74.
  49. Scheibner, E., Sato, T. and Craddock, C., (compilers), (1991), Tectonic map of the Circum-Pacific Region, Southwest Quadrant, 10 million scale (map and explanatory notes)’. US Geol. Surv. Map CP-37.
  50. Schmidt, P.W. and Embleton, B.J.J., (1981), ‘Magnetic overprinting in Southeastern Australia and the thermal history of its rifted margin’. J. Geophys. Res., 86, 3998–4008.
  51. Schmidt, P.W., and Embleton, B.J.J., (1987), ‘A critique of palaeomagnetic results from Australian Palaeozoic fold belts and displaced terranes’. pp 21–30, in, Leitch, E.C. and Scheibner, E. (Eds.), Terrane Accretion and Orogenic Belts. Am. Geophys. Union, Geodynamics Series, 19.
  52. Schmidt, P.W., and Morris, W.A., (1977), ‘An alternative view of Gondwana Palaeozoic apparent polar wander path’. Can. J. Earth Sci., 14, 535–561.
  53. Schmidt, P.W., Clark, D.A., and Rajagopalan, S., (1993), ‘An historical perspective of the early Palaeozoic APWP of Gondwana: New results from the Early Ordovician Black Hill Norite, South Australia’, this volume.
  54. Schmidt, P.W., Embleton, B.J.J., and Palmer, H.C., (1987), ‘Pre- and post-folding magnetizations from the Early Devonian Snowy River Volcanics and Buchan Caves Limestone, Victoria’. Geophys. J. Roy. Astron. Soc., 91, 155–170.
  55. Schmidt, P.W., Powell, C.McA, Li, Z.X., and Thrupp, G.A., (1990), ‘Reliability of palaeomagnetic poles and APWP for Gondwanaland’. Tectonophysics, 184, 87–100.
  56. Solomon, M., and Griffiths, J., (1972), ‘Tectonic evolution of the Tasman Orogenic Zone, eastern Australia’, Nature Phys. Sci., 237, 3–6.
  57. Stanton, R.L., (1956), ‘The Palaeozoic rocks of the Wisemans Creek- Burraga area, NSW’. J. Proc. Roy. Soc. NSW, 89, 131–145.
  58. Stewart, I.R., and Glen, R.A., (1991), ‘New Cambrian and Early Ordovician ages from the New South Wales south coast’. Quart. Notes. Geol. Surv. NSW., 85, 1–6.
  59. Stubley, M.P., (1989), ‘Structural analysis of the Mystery Bay area, New South Wales’. Aust. J. Earth Sciences, 36, 479–493.
  60. VandenBerg, A.H.M., and Stewart, I.R., (1992), ‘Ordovician terranes of southeastern Lachlan Fold Belt: stratigraphy, structure and palaeogeographic reconstruction’, pp 177–192, in, Fergusson, C.L. and Glen, R.A. (Eds.), The Palaeozoic eastern margin of Gondwanaland: Tectonics of the Lachlan Fold Belt of eastern Australia and related orogens. Tectonophysics, 214.
  61. Webby, B.D. and Packham, G.H., (1982), ‘Stratigraphy and regional setting of the Cliefden Caves Limestone Group (Late Ordovician), central-western New South Wales’. J. Geol. Soc. Aust., 29, 297–317.
  62. Wilson, C.J.L., (1968), The geology of the Narooma area, NSW’. J. Proc. Roy. Soc. NSW, 101, 147–157.
  63. Wyborn, D., (1992), The tectonic significance of Ordovician magmatism in the eastern Lachlan Fold Belt’, pp 177–192, in, Fergusson, C.L. and Glen, R.A. (Eds.), The Palaeozoic eastern margin of Gondwanaland: Tectonics of the Lachlan Fold Belt of eastern Australia and related orogens. Tectonophysics, 214.
  64. Wyborn, D., Turner, B.S., and Chappell, B.W., (1987), The Boggy Plains Supersuite: a distinctive belt of l-type igneous rocks of potential economic significance in the Lachlan Fold Belt’. Aust. J. Earth Sci., 34, 21–43.
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  • Article Type: Research Article
Keyword(s): Lachlan Orogen; palaeomagnetic tests; terrane models

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