Structural style in a young flexure-induced oblique extensional system, north-western Bonaparte Basin, Australia

Saqab, Muhammad Mudasar; Bourget, Julien

doi:10.1016/j.jsg.2015.06.002

Cited by 20 publications

(4 citation statements)

References 74 publications

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“…Midcrustal to deep‐crustal seismicity (>20 km) occurs along the outer continental margin of the Australian plate, south of Timor trough (Figure ), and available events yield normal focal mechanism solutions (Figure b). Geophysical data from the outer Australian continental shelf also show that the dominant style of crustal deformation involves normal faulting related to downward flexure of the continental lithosphere as it becomes involved with the Banda collision [ Langhi et al ., ; Saqab and Bourget , ]. Deep focus events occur north of the inner Banda arc (Flores and Wetar islands) and are characterized by normal and normal‐oblique slip related to deformation of the subducted slab (Figure ).…”

Section: Regional Tectonic Settingmentioning

confidence: 96%

“…Geophysical data from the outer Australian continental shelf also show that the dominant style of crustal deformation involves normal faulting related to downward flexure of the continental lithosphere as it becomes involved with the Banda collision [Langhi et al, 2011;Saqab and Bourget, 2015]. Deep focus events occur north of the inner Banda arc (Flores and Wetar islands) and are characterized by normal and normaloblique slip related to deformation of the subducted slab ( Figure 4).…”

Section: 1002/2015tc004103mentioning

confidence: 99%

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Transcurrent reactivation of Australia's western passive margin: An example of intraplate deformation from the central Indo‐Australian plate

Hengesh

Whitney

2016

Tectonics

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Australia's northwestern passive margin intersects the eastern termination of the Java trench segment of the Sunda arc subduction zone and the western termination of Timor trough along the Banda arc tectonic collision zone. Differential relative motion between the Sunda arc subduction zone and the Banda arc collision zone has reactivated the former rifted margin of northwestern Australia evidenced by Pliocene to Quaternary age deformation along a 1400 km long offshore fault system. The fault system has higher rates of seismicity than the adjacent nonextended crustal terranes, has produced the largest historical earthquake in Australia (1941 M L 7.3 Meeberrie event), and is dominated by focal mechanism solutions consistent with dextral motion along northeast trending fault planes. The faults crosscut late Miocene unconformities that are eroded across middle Miocene inversion structures suggesting multiple phases of Neogene and younger fault reactivation. Onset of deformation is consistent with the timing of the collision of the Scott Plateau part of the passive continental margin with the former Banda trench between 3.0 Ma and present. The range of estimated maximum horizontal slip rates across the zone is~1.4 to 2.6 mm yr À1 , at the threshold of geodetically detectable motion, yet significant with respect to an intraplate tectonic setting. The folding and faulting along this part of the continental margin provides an example of intraplate deformation resulting from kinematic transitions along a distant plate boundary and demonstrates the presence of a youthful evolving intraplate fault system within the Indo-Australian plate.

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Section: Regional Tectonic Settingmentioning

confidence: 96%

Section: 1002/2015tc004103mentioning

confidence: 99%

Transcurrent reactivation of Australia's western passive margin: An example of intraplate deformation from the central Indo‐Australian plate

Hengesh

Whitney

2016

Tectonics

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“…In contrast, during the Late Triassic, the Bonaparte Basin was under compressional forces (Longley et al, 2002;Saqab and Bourget, 2015a;Saqab and Bourget, 2015b).…”

Section: Tectonic Settingmentioning

confidence: 99%

Distribution and growth styles of isolated carbonate platforms as a function of fault propagation

Espejel

Alves

Blenkinsop

2019

Marine and Petroleum Geology

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Fault control on the position and distribution of isolated carbonate platforms is investigated in Northwest Australia using high quality 3D seismic and borehole data from the Bonaparte Basin. Specifically, we address the relationship between carbonate productivity and fault growth so as to understand what the primary controls on the growth of isolated carbonate platforms are. Throw-depth (T-Z) and throw-distance (T-D) profiles for normal faults suggest they formed fault segments that were linked at different times in the study area. This caused differential vertical movements: some of the normal faults have propagated to the surface, while others have upper tips 19 to 530 ms two-way-time below the sea floor, with the largest values comprising faults underneath isolated carbonate platforms. As a result, four distinct zones correlate with variable geometries and sizes of carbonate platforms, which are a function of topographic relief generated by underlying propagating faults. Some relay ramps form a preferred location for the initiation and development of carbonate platforms, together with adjacent structural highs. Due to the complex effect of fault propagation to the palaeosurface, and soft-linkage through relay ramps, three distinct models are proposed. Two models explain carbonate platform growth and one explains changes in its internal structure: (1) in the first model, fault throw is larger than carbonate productivity; (2) the second model considers fault throw to be equal or less than carbonate productivity; and (3) the third model,

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“…Structural style refers to the specific combination of structures that have a close connection with each other in terms of profile shapes, plane layouts, arrangements and response mechanisms. Such structures have similar structural characteristics and deformational mechanisms (Yang, 2006;Missenard et al 2007;Tripodi et al 2013;Saqab & Bourget, 2015). The increasing relevance of structural-style-controlled petroleum traps to exploration in deeper basins has increased interest in deciphering how the structural style influences the basin formation and filling process (Harding & Lowell, 1979;Allen et al 1997;Polonia & Camerlenghi, 2002;Sepehr & Cosgrove, 2004;Hickman et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Structural styles and tectonic evolution of Mesozoic–Cenozoic faults in the Eastern Depression of Bayanhaote Basin, China: implications for petroleum traps

Zhou

Ding

Zhang³

et al. 2022

Geol. Mag.

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The Eastern Depression in the Bayanhaote Basin in western Inner Mongolia has experienced multi-stage Meso-Cenozoic tectonic events and possesses considerable exploration potential. However, structural deformation patterns, sequences and the genesis of oil-bearing structures in the basin are still poorly understood. In this study, based on high-quality 2D seismic data and drilling and well-logging data, we elucidate the activities and structural styles of faults, the tectonic evolution and the distribution characteristics of styles, as well as assessing potential petroleum traps in the Eastern Depression. Five types of faults that were active at different stages of the Meso-Cenozoic faults have been recognized: long-lived normal faults active since the late Middle Jurassic; reverse faults and strike-slip faults active in the late Late Jurassic; normal faults active in the Early Cretaceous; normal faults active in the Oligocene; and negative inverted faults active in the Early Cretaceous and Oligocene. These faults constituted 12 geometric styles in NE-trending belts at various stratigraphic levels, and were formed by compression, strike-slip, extension and inversion. The temporal development of structural styles promoted the formation and reconstruction and finalization of structural traps, while regional unconformities and open reverse and strike-slip faults provided migration pathways for petroleum to fill the traps. In general, potential traps that formed by compressional movement and strike-slip movement in the late Late Jurassic are primarily faulted anticlines. Those traps developed in Carboniferous rocks and are located in the southwestern region of the Eastern Depression, being controlled by NNE-NE-striking reverse and transpressive faults.

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Structural style in a young flexure-induced oblique extensional system, north-western Bonaparte Basin, Australia

Cited by 20 publications

References 74 publications

Transcurrent reactivation of Australia's western passive margin: An example of intraplate deformation from the central Indo‐Australian plate

Transcurrent reactivation of Australia's western passive margin: An example of intraplate deformation from the central Indo‐Australian plate

Distribution and growth styles of isolated carbonate platforms as a function of fault propagation

Structural styles and tectonic evolution of Mesozoic–Cenozoic faults in the Eastern Depression of Bayanhaote Basin, China: implications for petroleum traps

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