Continuation of the Ross–Delamerian Orogen: insights from eastern Australian detrital-zircon data

Shaanan, Uri; Rosenbaum, Gideon; Sihombing, F. M.H.

doi:10.1080/08120099.2017.1354916

Cited by 37 publications

(28 citation statements)

References 82 publications

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“…Ma, and 1300-900 Ma detrital zircon ages in the New Caledonian basement, suggest a contribution from reworked metasedimentary strata of the Tasmanides (Fergusson et al, 2017;Shaanan et al, 2018b). The occurrence of 16 older cores within zircon grains of Mesozoic rim ages also corresponds with the ages described above (335-1100 Ma; Fig.…”

Section: Early Permian To Middle Triassic Magmatism Is Evident In Thesupporting

confidence: 70%

“…Detrital zircon data of samples from each terrane that consisted of overlapping constraints for the time of deposition were merged. Merging multiple samples is shown to address the naturally occurring internal variations in the proportions of age populations (e.g., Shaanan et al, 2018b), as well as providing a sufficient yield of zircon ages to permit terrane analysis. The characteristic age spectra and temporal variations within each of the different New Caledonian terranes were then examined through cumulative proportion curves and kernel density estimates (Vermeesch, 2012).…”

Section: Data Handlingmentioning

confidence: 99%

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Permian rifting and isolation of New Caledonia: Evidence from detrital zircon geochronology

et al. 2018

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The island of New Caledonia is the second largest rock exposure of the continent Zealandia. The New Caledonian basement rocks have been interpreted as representing a late Paleozoic to Mesozoic intra-oceanic arc system that was possibly correlative to contemporaneous terranes in eastern Australia and New Zealand. In order to understand tectonic relationships between the basement rocks of New Caledonia and other eastern Gondwanan terranes, we obtained >2200 new U-Pb ages of detrital zircon grains from New Caledonia. Our new results, combined with a synthesis of previously published geochronological data, show abundant pre-Mesozoic zircon ages, but an absence of Early Permian to Middle Triassic ages, which are characteristic of eastern Gondwana magmatism. The results thus suggest that the

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Section: Early Permian To Middle Triassic Magmatism Is Evident In Thesupporting

confidence: 70%

Section: Data Handlingmentioning

confidence: 99%

Permian rifting and isolation of New Caledonia: Evidence from detrital zircon geochronology

et al. 2018

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“…The change in structural grain, from the NW‐trending Koonenberry Belt to the NE‐trending Gidgealpa‐Merrimelia‐Innamincka and Birdsville Track ridges (Figure ), marks another curvature in the contorted Delamerian belt (Figure a). Farther north, the recognition of “Delamerian” deformation and magmatism in the northeastern part of the Thomson Orogen (Fergusson, Henderson, Fanning, & Withnall, ; Withnall et al, ) led to suggestions that the two parts of the “Delamerian‐Thomson belt” (Shaanan et al, ) are segmented (Abdullah & Rosenbaum, ; Rosenbaum, ; Figures b and c). The inferred curvature in the eastern Warburton Basin is consistent with this segmentation, showing a possible dragging of the fold belt into a broad approximately E‐W dextral shear zone.…”

Section: Discussionmentioning

confidence: 99%

Evidence for Deformation in the Cambrian‐Ordovician Warburton Basin and Implications for the Evolution of the Tasmanides (Eastern Australia)

et al. 2019

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The Paleozoic tectonic history of the Tasmanides in eastern Australia was dominated by subduction‐related processes along the margin of eastern Gondwana. The earliest deformation event, Delamerian Orogeny, took place in the middle‐late Cambrian and is recorded in rocks within the Delamerian and Thomson orogens. The Cambrian‐Ordovician Warburton Basin covers the boundary between the Delamerian and Thomson Orogens, but very little is known about its origin and deformation history. Here we interpret geophysical data, including 2‐D seismic reflection transects, Bouguer gravity, and aeromagnetic data that provide new insights into the deformation in the eastern Warburton Basin and the kinematics of major faults. Our results show that curvilinear NE‐trending faults in the eastern Warburton Basin are basement reverse faults that experienced multiple phases of contractional deformation. Evidence for a syn‐kinematic Cambrian package (Kalladeina Formation) suggests that faulting commenced in response to the Delamerian Orogeny. A subsequent Early Devonian deformation in the eastern Warburton Basin is evident from K‐Ar geochronology of low‐grade (subgreenschist) metasedimentary rocks. We suggest that the NE‐trending Cambrian fold‐thrust belt within the eastern Warburton Basin marks the continuation of the curved Delamerian Orogen into the Thomson Orogen. This oroclinal structure may have developed in the Early Devonian in response to dextral transpression along the northern boundary of the Delamerian Orogen. Our results provide a demonstration for the complex interactions that can take place during the evolution of convergent plate boundaries, involving deformation in the fold‐thrust belt, development of sedimentary basins, and oroclinal bending.

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“…These include deformed metasedimentary rocks like those of the Greenvale Province. The Greenvale and Charters Towers provinces have been assigned to the Thomson Orogen, an early Paleozoic precursor to the mid Paleozoic Mossman Orogen in the architecture of the Tasmanides (Fergusson & Henderson, 2013Shaanan, Rosenbaum, & Sihombing, 2018).…”

Section: Geological Settingmentioning

confidence: 99%

Growth and provenance of a Paleozoic subduction complex in the Broken River Province, Mossman Orogen: evidence from detrital zircon ages

Henderson

Fergusson

2019

Australian Journal of Earth Sciences

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A Paleozoic subduction complex dominates the Mossman Orogen developed at the northern extremity of the Tasmanides, eastern Australia. Its southern part, displayed in the Broken River Province, is characterised by dismembered ocean-plate stratigraphy in which turbidite-dominated packages and widespread tectonic mélange development are characteristic. The Broken River complex is characterised by formations with quartzose sandstone alternating with those largely formed of sandstone of more labile character. The two compositional groups are considered to reflect separate, age-significant sedimentary regimes, but their ages have hitherto been poorly constrained. With the use of 1082 concordant detrital zircon ages from 13 samples we provide age control for the complex and track its sedimentary provenance. Of quartzose units, the Tribute Hills Arenite and Pelican Range Formation are late Cambrian-Early Ordovician, and the Wairuna Formation is Middle to Late Ordovician, in age. The more labile units (Greenvale, Perry Creek and Kangaroo Hills formations) are collectively of late Silurian-mid-Devonian age. Development of the complex spanned some 130 Myr. Continent-derived sediment involved in accretion of much the complex, from mid-Ordovician to mid-Devonian, was largely sourced from a nearby magmatic arc of late Cambrian-Devonian age, now represented by granitoid plutons of the Macrossan and Pama igneous associations. An older far-field Pacific-Gondwana sediment source is characteristic of early-phase (late Cambrian-Early Ordovician) accretion, in common with sedimentary units of this age generally developed in the Tasmanides. We consider the complex to have grown largely by underplating that positioned younger components beneath those that are older, with out-of-sequence thrust interleaving of these components occurring late in the accretionary history. A Late Devonian contractional folding and cleavage development (Tabberabberan orogenesis) is uniformly expressed across the entire complex and reflects an abrupt change in plate engagement with imposition of a compressional stress regime.

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Continuation of the Ross–Delamerian Orogen: insights from eastern Australian detrital-zircon data

Cited by 37 publications

References 82 publications

Permian rifting and isolation of New Caledonia: Evidence from detrital zircon geochronology

Permian rifting and isolation of New Caledonia: Evidence from detrital zircon geochronology

Evidence for Deformation in the Cambrian‐Ordovician Warburton Basin and Implications for the Evolution of the Tasmanides (Eastern Australia)

Growth and provenance of a Paleozoic subduction complex in the Broken River Province, Mossman Orogen: evidence from detrital zircon ages

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