Syndepositional fault control on lower Frasnian platform evolution, Lennard Shelf, Canning Basin, Australia

George, Annette D.; Chow, Nancy; Trinajstic, Kate

doi:10.1130/g25461a.1

Cited by 19 publications

(18 citation statements)

References 20 publications

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“…Syn‐sedimentary faulting is considered to have been a major control on accommodation and the evolution of the Hull platform (George et al ., ). General facies patterns in the Hull platform indicate that the major controlling structure was the north‐trending Mount Elma–Painted Rocks fault system to the east (Fig.…”

Section: Overview Of the Hull Platformmentioning

confidence: 97%

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Stratal architecture and platform evolution of an early Frasnian syn‐tectonic carbonate platform, Canning Basin, Australia

et al. 2013

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Facies architecture and platform evolution of an early Frasnian reef complex in the northern Canning Basin of north-western Australia were strongly controlled by syn-depositional faulting during a phase of basin extension. The margin-attached Hull platform developed on a fault block of Precambrian basement with accommodation largely generated by movement along the Mount Elma Fault Zone. Recognition of major subaerial exposure and flooding surfaces in the Hull platform (from outcrop and drillcore) has enabled comparison of facies associations within a temporal framework and led to identification of three stages of platform evolution. Stage 1 records initial ramp development on the hangingwall dip slope with predominantly deep subtidal conditions that prevented any cyclic facies arrangements. This stage is characterised by basal siliciclastic deposits and a major deepening-upward facies pattern that is capped by a sequence boundary towards the footwall (north-west) and a major flooding surface towards the hangingwall. Stage 2 reflects the bulk of platform aggradation, significant platform growth towards the hangingwall and the development of reef margins and cyclic facies arrangements. Thickening of this stage towards the hangingwall indicates that accommodation was generated by rotation of the fault block and overlying platform. Stage 3 records a major flooding and backstep of the platform margin. The Hull platform illustrates important elements of margin-attached carbonate platforms in a half-graben setting, including: (i) prominent, but limited, coarse siliciclastic input that does not have a major detrimental effect on carbonate production near the rift margin in arid to semi-arid settings; (ii) wedge-shaped accommodation created by syn-depositional rotation of fault blocks and tilting of the hangingwall dip slope, resulting in shallowwater facies and subaerial exposure up-dip of the rotational axis and deeper water facies down-dip; and (iii) evolution of a ramp to rimmed shelf, coincident with a sequence boundary-flooding surface, that is accelerated by tilting of the hangingwall dip slope during fault-block rotation.

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Section: Overview Of the Hull Platformmentioning

confidence: 97%

“…). The Hull platform is interpreted to have developed as a margin‐attached platform on a tilted basement block with differential subsidence and wedge‐shaped accommodation controlled by syn‐depositional faulting (George et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Stratal architecture and platform evolution of an early Frasnian syn‐tectonic carbonate platform, Canning Basin, Australia

et al. 2013

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“…The Hull platform (our collective term for Hull Range, Horse Spring Range and Guppy Hills) is important because it contains clear evidence of subaerial exposure and flooding events for which we have biostratigraphic control (microvertebrate and conodont biostratigraphy) to show that the entire platform succession is within Frasnian Zones 2-6 (George & Chow 1999;George et al 2009). This is in contrast to Hocking & Playford (2000) who considered Horse Spring Range and Guppy Hills to be largely Givetian.…”

Section: Hull Platform (Hull Range Guppy Hills and Horse Spring Range)mentioning

confidence: 99%

Frasnian reef evolution and palaeogeography, SE Lennard Shelf, Canning Basin, Australia

George

Trinajstic

Chow

2009

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Frasnian reef complexes of the southeastern Lennard Shelf (northern Canning Basin) developed on tilt-block highs and their evolution was controlled by fault-related subsidence. Tectonic control on relative sea-level changes was, therefore, a major factor influencing EarlyMiddle Frasnian palaeogeography of the Lennard Shelf. However, palaeogeographic reconstruction is not consistent with simple landward (northward) backstepping and younging of reef complexes in response to basin extension and subsidence of fault blocks. Using a sequencestratigraphic approach, in conjunction with sedimentological and biostratigraphic data, we propose that two neighbouring fault blocks (Lawford area on the eastern side of Bugle Gap and the Hull platform to the north) record a similar history and that the reef complexes on those blocks were initiated at similar times. Seven phases of Early-Middle Frasnian platform growth (Fr2-8) are identified. All are bounded by third-order flooding surfaces associated with backstepping of platform margins and three surfaces (defined by conodont Zone 4, Zone 6 and late Zone 6) correlate across the two fault blocks. Only one sequence boundary has been clearly identified and a second relative sea-level fall is proposed based on a major collapse event following progradation and associated coarse siliciclastic facies. We propose that the correlation of flooding events across the SE Lennard Shelf is related to episodes of basin-margin faulting centred on the large, long (c. 25 km) faults which border these blocks (shelf-parallel faults for the Lawford block and an oblique north-trending transfer zone for the Hull block). There is limited evidence for relative sea-level falls and those recognized most likely resulted from eustatic events. The correlation between the Lawford block and Hull platform suggests linkage between major NW-trending shelf-parallel and oblique transfer faults and an evolved rift system by the Early Frasnian.

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“…The F/F crisis shows regionally different physical stratigraphical expression, e.g. : (i) deposition of the well‐known Kellwaser limestones and associated anoxic beds during the Upper rhenana and linguiformis zones (Sandberg et al ., , ; Wendt and Belka, ; Schindler, ; Lazreq, ; Tribovillard et al ., ; Bond and Wignall, , ; Bond et al ., ; Riquier et al ., , ; Pujol et al ., ; Navas‐Parejo et al ., ); (ii) gaps and/or sharp changes in the conodont record related to stratigraphic discontinuity surfaces such as hardgrounds, omission surfaces, karstification and drowning of carbonate platforms due to sea‐level or climatic changes and/or to regional tectonics (Rodríguez‐Cañero, ; George et al ., , ; Girard and Feist, ; Becker and House, ; Racki, , ; Veimarn et al ., ; Hallam and Wignall, ; Streel et al ., ; Devleeschouwer et al ., ; Racki et al ., ; Yudina et al ., ; Chow et al ., ; Averbuch et al ., ; Hocking et al ., ; Morrow and Sandberg, ; Matyja, ); (iii) redeposited beds related to mass flows, tsunamites and/or tempestites recorded during the Lower triangularis zone (Sandberg et al ., , ; Wang et al ., ; Wang, ; Racki, ; Yazdi, ; Du et al ., ); (iv) stable isotopic and other geochemical excursions, sometimes associated with magnetic susceptibility changes (Buggisch, ; Wang et al ., ; Joachimski and Buggisch, ; Nicoll and Playford, ; Girard and Albarède, ; Joachimski et al ., ; Crick et al ., ; Racki et al ., ; Stephens and Sumner, ; Buggisch and Joachimski, ; Pujol et al ., ; Riquier et al ., ; Savage et al ., ; Xu et al ., ); and (v) putative microtektites related to comet shower impacts around the F/F (Sandberg et al ., ; ...…”

Section: Introductionmentioning

confidence: 99%

“…The F/F crisis shows regionally different physical stratigraphical expression, e.g. : (i) deposition of the well-known Kellwaser limestones and associated anoxic beds during the Upper rhenana and linguiformis zones (Sandberg et al, 1988(Sandberg et al, , 2002Wendt and Belka, 1991;Schindler, 1993;Lazreq, 1999;Tribovillard et al, 2004;Wignall, 2005, 2008;Riquier et al, 2005Riquier et al, , 2006Pujol et al, 2006;Navas-Parejo et al, 2009); (ii) gaps and/or sharp changes in the conodont record related to stratigraphic discontinuity surfaces such as hardgrounds, omission surfaces, karstification and drowning of carbonate platforms due to sea-level or climatic changes and/or to regional tectonics (Rodr ıguez-Cañero, 1993a;George et al, 1995George et al, , 2009Girard and Feist, 1996;Becker and House, 1997;Racki, 1997Racki, , 1998Veimarn et al, 1997;Hallam and Wignall, 1999;Streel et al, 2000;Devleesc-houwer et al, 2002;Racki et al, 2002;Yudina et al, 2002;Chow et al, 2004;Averbuch et al, 2005;Hocking et al, 2008;Morrow and Sandberg, 2008;Matyja, 2009); (iii) redeposited beds related to mass flows, tsunamites and/or tempestites recorded during the Lower triangularis zone (Sandberg et al, 1988(Sandberg et al, , 2002Wang et al, 1991;Wang, 1994;Racki, 1999;…”

Section: Introductionmentioning

confidence: 99%

Frasnian–Famennian crisis in the Malaguide Complex (Betic Cordillera, Spain)

Rodríguez-Cañero

Martín‐Algarra

2013

Terra Nova

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Devonian sediments of the Malaguide Complex potentially could include the Frasnian-Famennian boundary, one of the five greatest Phanerozoic biotic crises. Conodont biofacies and microfacies of carbonate clasts from a pebbly mudstone underlying Tournaisian radiolarites allows identification, for the first time in the Malaguide Complex, of Devonian shallow marine environments laterally grading to deeper realms. The clasts yielded Frasnian conodont associations of the falsiovalis to rhenana biozones, with six biofacies that reveal different environmental conditions in their source areas. Source sediments were dismantled and redeposited within the pebbly mudstone, whose origin is tentatively related to one of the events that are associated worldwide with the Frasnian-Famennian crisis. The latter is recorded, in two equivalent Malaguide pelagic successions, by stratigraphic discontinuities, and it was, probably, tectonically and/ or eustatically controlled, as in other Alpine-Mediterranean Paleotethyan margins.

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Syndepositional fault control on lower Frasnian platform evolution, Lennard Shelf, Canning Basin, Australia

Cited by 19 publications

References 20 publications

Stratal architecture and platform evolution of an early Frasnian syn‐tectonic carbonate platform, Canning Basin, Australia

Stratal architecture and platform evolution of an early Frasnian syn‐tectonic carbonate platform, Canning Basin, Australia

Frasnian reef evolution and palaeogeography, SE Lennard Shelf, Canning Basin, Australia

Frasnian–Famennian crisis in the Malaguide Complex (Betic Cordillera, Spain)

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