Complex regional fault history of the Badger Head region, northern Tasmania

Elliott, C. G.; Woodward, Nicholas B.; Gray, David

doi:10.1080/08120099308728072

Cited by 17 publications

(20 citation statements)

References 18 publications

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“…9f). The location of this feature coincides with that of the Northeast Tasmania Element (Brown et al 1998), a tectonic element with a distinct surface geology that was juxtaposed with western Tasmania during the Mid-Devonian Tabberabberan Orogeny (Elliot et al 1993). Evidence from coincident reflection data (Barton 1999) and a previous refraction survey (Richardson 1980) also indicates a thinning of the crust beneath the Northeast Tasmania Element.…”

Section: Discussionsupporting

confidence: 68%

Irregular interface parametrization in 3-D wide-angle seismic traveltime tomography

Rawlinson

Sambridge

2003

Geophysical Journal International

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SUMMARY We investigate the potential advantages and pitfalls of using an irregular interface parametrization in 3‐D wide‐angle seismic traveltime tomography. Several synthetic tests are performed using an interface surface consisting of a mosaic of cubic B‐spline surface patches and a source–receiver array designed to produce a highly variable distribution of refracted and reflected ray paths. In such circumstances, an irregular parametrization can be adapted to suit the data coverage, resulting in fewer parameters being needed to describe the solution model, faster computation time and a better determined inverse problem. We demonstrate that a judicious parameter distribution can also result in a solution that is well constrained everywhere, satisfies the data to an acceptable level and extracts more information from the data than a regular parametrization. However, introducing an irregular parametrization means that the minimum wavelength of structure permitted in the model will vary both spatially and directionally. Careful consideration of surface patch size and shape, in addition to resolution estimates and data fit, is therefore required to meaningfully interpret this class of solution. An application of the irregular parametrization method to 3‐D wide‐angle data collected in Tasmania is also presented, and reveals several features consistent with the known geology that were not recovered with a regular parametrization.

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Section: Discussionsupporting

confidence: 68%

Irregular interface parametrization in 3-D wide-angle seismic traveltime tomography

Rawlinson

Sambridge

2003

Geophysical Journal International

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“…The tectonic environment necessary to create these features may have been provided by the Late Cambrian Tyennan Orogeny. During this time, substantial E-W shortening was experienced throughout much of Tasmania [Elliot et al, 1993]. The Rocky Cape Element behaved as a resistant cratonic block during this compressional episode [Turner et al, 1998] and was not substantially thickened; in this scenario, the Arthur Lineament represents the NW limit of the Orogeny.…”

Section: Tectonic Implicationsmentioning

confidence: 97%

New evidence of Tasmania's tectonic history from a novel seismic experiment

Rawlinson¹,

Houseman²,

Collins³

et al. 2001

Geophysical Research Letters

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“…He recalled an earlier suggestion by Green (1959) that rocks then exposed in Beaconsfield (the Grubb Beds) were also similar to rocks in the Mathinna Supergroup, but the Grubb Beds have subsequently been correlated with the Johnston Creek Siltstone and the Eldon Group of western Tasmania. The Mathinna Supergroup correlation was recognised by Elliott et al (1993), a correlation discounted by Powell et al (1993), but the sedimentological correlation has now been accepted after further examination in the field by Baillie (pefs. comm.).…”

Section: Discussionmentioning

confidence: 97%

“…The thrust model used by Gee & Legge (1971, 1979 to explain the structural setting of the Palaeozoic rocks of the Beaconsfield district has stood the test of time (Elliott et at. 1993 and is not reiterated here.…”

Section: Discussionmentioning

confidence: 99%