1887
2nd Australasian Exploration Geoscience Conference: Data to Discovery
  • ISSN: 2202-0586
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Abstract

Summary

The structural context and Australian versus Asian affinity of regional outcrop of Timor’s Lolotoi Metamorphic Complex are critical to the interpretation of hydrocarbon prospectivity but are obscured by complex geology and still strongly debated. Timor Resources and Geomage used Common-Offset Multi-Focus (CO-MF) processing to vastly improve imaging of legacy onshore seismic surveys. These are interpreted by integration with surface geology mapping, wells, offshore seismic and gravity data, providing the first geophysical insight and possible resolution of the Lolotoi conundrum. Beneath a bland zone interpreted as allochthonous Lolotoi lies reflectivity interpreted as faulted blocks within a large sub-allochthon anticline. Closure up to 90 km2 occurs to a modest total depth around 2500 mSS, providing a viable drill target to test the sub-thrust reflectivity package.

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2019-12-01
2026-01-13

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References

  1. AUDLEY-CHARLES M. G. 1968 The Geology of Portugese Timor. Geological Society of London, London.
  2. CHARLTON T. R. 1989 Stratigraphic correlation across an arc-continent collision zone: Timor and the Australian Northwest Shelf, Australian Journal of Earth Sciences, vol. 36, no. 2, pp. 263-274.
  3. --- 2002 The structural setting and tectonic significance of the Lolotoi, Laclubar and Aileu metamorphic massifs, East Timor, Journal of Asian Earth Sciences, vol. 20, no. 7, pp. 851-865.
  4. DUFFY B., KALANSKY J., BASSETT K., HARRIS R., QUIGLEY M., VAN HINSBERGEN D. J., STRACHAN L. J. & ROSENTHAL Y. 2017 Melange versus forearc contributions to sedimentation and uplift, during rapid denudation of a young Banda forearccontinent collisional belt, Journal of Asian Earth Sciences, vol. 138, pp. 186-210.
  5. DUFFY B., QUIGLEY M. C., HARRIS R. & RING U. 2013 Arcparallel extrusion of the Timor sector of the Banda arccontinent collision, Tectonics, vol. 32, no. 3, pp. 641-660.
  6. HAIG D. W. & MCCARTAIN E. 2007 Carbonate pelagites in the post-Gondwana succession (Cretaceous - Neogene) of East Timor, Australian Journal of Earth Sciences, vol. 54, no. 6, pp. 875-897.
  7. HARRIS R. A. 2006 Rise and fall of the Eastern Great Indonesian arc recorded by the assembly, dispersion and accretion of the Banda Terrane, Timor, Gondwana Research, vol. 10, no. 3-4, pp. 207-231.
  8. HARRIS R. A., SAWYER R. K. & AUDLEY-CHARLES M. G. 1998 Collisional melange development: geologic associations of active melange-forming processes with exhumed melange facies in the western Banda orogen, Indonesia, Tectonics, vol. 17, no. 3, pp. 458-479.
  9. KAYE S. K. 1990 The structure of eastern Indonesia: an approach via gravity and other geophysical methods. pp. 282. London: University of London.
  10. KEEP M. & HAIG D. W. 2010 Deformation and exhumation in Timor: Distinct stages of a young orogeny, Tectonophysics, vol. 483, no. 1-2, pp. 93-111.
  11. NGUYEN N., DUFFY B., SHULMEISTER J. & QUIGLEY M. C. 2013 Rapid Pliocene uplift of Timor, Geology, vol. 41, no. 2, pp. 179-182.
  12. PARK S.-I., KWON S. & KIM S. W. 2014 Evidence for the Jurassic arc volcanism of the Lolotoi complex, Timor: Tectonic Implications, Journal of Asian Earth Sciences, no. 0.
  13. PEDLEY K. L., BARNES P. M., PETTINGA J. R. & LEWIS K. B. 2010 Seafloor structural geomorphic evolution of the accretionary frontal wedge in response to seamount subduction, Poverty Indentation, New Zealand, Marine Geology, vol. 270, no. 1-4, pp. 119-138
  14. PETKOVIC P., COLLINS C. D. N. & FINLAYSON D. M. 2000 A crustal transect between precambrian Australia and the Timor trough across the Vulcan sub-basin, Tectonophysics, vol. 329, no. 1-4, pp. 23-38.
  15. POYNTER S., GOLDBERG A. & HEARTY D. 2013 Sedimentary and Structural Features of the Plio-Pleistocene Timor Accretionary Wedge, Timor-Leste. In MOSS S. J. & KEEP M. eds. West Australian Basins Symposium 2013 proceedings. Perth Convention Centre, Western Australia: Petroleum Exploration Society of Australia.
  16. STANDLEY C. E. & HARRIS R. A. 2009 Tectonic Evolution of Forearc Nappes of the Active Banda Arc-Continent Collision: Origin, Age, Metamorphic History and Structure of the Lolotoi Complex, East Timor, Tectonophysics, vol. doi:10.1016/j.tecto.2009.01.034.
  17. TATE G. W., MCQUARRIE N., VAN HINSBERGEN D. J. J., BAKKER R. R., HARRIS R. & JIANG H. 2015 Australia going down under: Quantifying continental subduction during arccontinent accretion in Timor-Leste, Geosphere.
  18. VEEVERS J. J. 1971 Shallow stratigraphy and structure of the Australian continental margin beneath the Timor Sea, Marine Geology, vol. 11, no. 4, pp. 209-249.
  19. VON HUENE R. & RANERO C. R. 2003 Subduction erosion and basal friction along the sediment-starved convergent margin off Antofagasta, Chile, Journal of Geophysical Research: Solid Earth, vol. 108, no. B2, p. 2079.
  20. ZIMMERMANN S. & HALL R. 2016 Provenance of Triassic and Jurassic sandstones in the Banda Arc: Petrography, heavy minerals and zircon geochronology, Gondwana Research, vol. 37, pp. 1-19.
/content/journals/10.1080/22020586.2019.12073217
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  • Article Type: Research Article
Keyword(s): allochthon; legacy seismic; sub-thrust; Timor-Leste

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