The Hv11 3-D Seismic Survey: Skua – Swift Area Geology Revealed?

Fittall, A.M.; Cowley, R.

doi:10.1071/aj91013

Cited by 2 publications

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“…(A) Simplified structural elements map of the southern Timor Sea region. (B) Schematic cross-section through the Rowan, Skua and Swift fault blocks (modified fromFittall & Cowley, 1992).…”

mentioning

confidence: 99%

Fault intersections as critical hydrocarbon leakage zones: integrated field study and numerical modelling of an example from the Timor Sea, Australia

Gartrell

Zhang

Lisk

et al. 2004

Marine and Petroleum Geology

107

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“…(A) Simplified structural elements map of the southern Timor Sea region. (B) Schematic cross-section through the Rowan, Skua and Swift fault blocks (modified fromFittall & Cowley, 1992).…”

mentioning

confidence: 99%

Fault intersections as critical hydrocarbon leakage zones: integrated field study and numerical modelling of an example from the Timor Sea, Australia

Gartrell

Zhang

Lisk

et al. 2004

Marine and Petroleum Geology

107

View full text Add to dashboard Cite

“…In both areas a significant proportion of the accommodation volume was due to subsidence rather than extension. In the Skua and Jabiru areas the final burial of the horsts can be timed by the Santonian transition from erosion of the uplifted horsts to drape by sediments in a rapidly deepening environment (Fittall & Cowley 1992). Significantly, fault dips became steeper in both areas in the Tithonian, but particularly in the south, indicating oblique extension probably trending 310–330°.…”

Section: Summary Of the Geological Evolution Of The Vulcan Sub‐basinmentioning

confidence: 99%

Geodynamic evolution of the Vulcan Sub‐basin, Timor Sea, northwest Australia: A pre‐compression New Guinea analogue?

Chen

Hill

Hoffman

et al. 2002

Australian Journal of Earth Sciences

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The Vulcan Sub‐basin lies immediately inboard of the incipient arc–continent collision in the Timor Sea and comprises part of the Bonaparte Basin system, the northernmost basin on Australia's North West Shelf. Given the high level of preservation of its extensional fabric, the region can provide important analogues for the likely pre‐orogeny architecture of New Guinea, which enables a better understanding of the onset of, and response to, orogenesis. Structural restoration of regional, depth‐converted 2‐D seismic lines shows that although the Late Jurassic Swan Graben is significant and contains a thick source‐rock section, the principal phase of crustal extension took place in the Triassic to Middle Jurassic. Within the Vulcan Sub‐basin, the southern Tilted Fault Block Domain records ∼10% Triassic to Middle Jurassic extension, whereas <5% upper crustal extension has been measured in the northern Hourglass Domain. Similarly, while Jurassic extension in the Tilted Fault Block Domain is both deep and focused, the Hourglass Domain is expressed as a broad sag to the northeast, indicating a strong underlying basement influence on compartmentalisation. The Vulcan Sub‐basin shows four principal stages of evolution: (i) regional, evenly spaced crustal faulting and subsidence in the Triassic – Middle Jurassic; (ii) focused faulting in the Late Jurassic that created grabens with uplift of the shoulders; (iii) regional subsidence from the Middle Valanginian; and (iv) minor extensional and contractional reactivation in the Mio‐Pliocene. The measured brittle extension is much less than that suggested by modelling of lithospheric subsidence, which suggests long wavelength distribution of strain in the ductile lower crust, with upper crustal extension mainly focused along the continent–ocean boundary. Along the North West Shelf and on a smaller scale within the Vulcan Sub‐basin per se, the obvious, basement‐involved, rectilinear compartments defined by prominent offsetting of both extensional fault systems and abyssal plains have important implications for the development of the New Guinea orogen. Similar scale compartments are recognised in New Guinea and display different structural styles and hydrocarbon prospectivity. The transfer zones separating the compartments are the sites of the major copper–gold deposits in New Guinea. Using the Vulcan Sub‐basin – Timor area as an analogue, it can be seen that an arc could originally collide with a promontory, such as what is now Timor, and reactivate the lineaments allowing local extension and mineralisation. In addition, interpretation of the structure of the New Guinea Fold Belt may be aided by considering the effects of compression on the geometry of the Vulcan Sub‐basin and of the similar Carnarvon Basin and adjacent extended and broken Exmouth Plateau.

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The Hv11 3-D Seismic Survey: Skua – Swift Area Geology Revealed?

Cited by 2 publications

References 0 publications

Fault intersections as critical hydrocarbon leakage zones: integrated field study and numerical modelling of an example from the Timor Sea, Australia

Fault intersections as critical hydrocarbon leakage zones: integrated field study and numerical modelling of an example from the Timor Sea, Australia

Geodynamic evolution of the Vulcan Sub‐basin, Timor Sea, northwest Australia: A pre‐compression New Guinea analogue?

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