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ABSTRACT: Sequence Stratigraphy of the Paleozoic Graveyard Creek Basin, Broken River Province, Northeastern Australia

LANG, SIMON C., Geological Survey of Queensland, Brisbane, Queensland, Australia, CHRISTOPHER R. FIELDING, and JOHN S. JELL, Department of Geology and Mineralogy, University of Queensland, Brisbane, Queensland, Australia, and JOHN A. TALENT and RUTH MAWSON, Earth Sciences, Macquarie University, Sydney, New South Wales, Australia

In the northern part of the Tasman Orogen, northeastern Australia, up to 9000 m of almost continuous Silurian, Devonian and Early Carboniferous carbonate and siliciclastic rocks are preserved in the Graveyard Creek basin, which lies at the western end of prominent re-entrant in the Tasman Orogen, known as the Broken River Province. During recent geological mapping of the region, sedimentological and biostratigraphical studies recognized both local and regional unconformities, marine transgressions, and marine to nonmarine regressions. These have been interpreted as the erosional and depositional effects of regional tectonics and global sea level fluctuations. As a result, the stratigraphic record of the basin ha been re-evaluated, and a sequence stratigraphic framework proposed involv ng at least ten major unconformity- or disconformity-bounded sequences ranging in age from the late Llandoverian to the early Tournaisian. Facies range from marine slope and shelf to continental. Although the basin is overmature with respect to hydrocarbons, its sequence stratigraphy may prove useful as a reference for exploration in the potentially hydrocarbon rich, Paleozoic basins of offshore northern Australia (e.g., Arafura and Bonaparte Basins).


AAPG Search and Discovery Article #91015©1992 AAPG International Conference, Sydney, N.S.W., Australia, August 2-5, 1992 (2009)