The Gippsland Basin Top Latrobe Unconformity, and Its Expression in Other Se Australia Basins

Holdgate, G. R.; Rodriquez, C.; Johnstone, E.M.; Wallace, Malcolm W.; Gallagher, Stephen

doi:10.1071/aj02007

Cited by 18 publications

(21 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Offshore structures that initiated at this time include the Tuna and Flounder anticlines (Brown, 1986). This initial phase of compression was coincident with the erosion of the Flounder Channel and the development of the Mackerel Unconformity (Holdgate et al, 2003a). Apatite fission track samples collected from the Furneaux Islands located along the Bassian Rise to the south of the Gippsland Basin provide evidence for broadly coeval cooling and exhumation beginning between ~65 and 45 Ma (O'Sullivan et al 2000).…”

Section: Gippsland Basinmentioning

confidence: 98%

“…It comprises four subgroups (Emperor, Golden Beach, Halibut and Cobia) that are bounded by basin-wide unconformities (Bernecker et al, 2003). Of particular relevance to this study are a series of Eocene unconformities that have been documented in detail by Holdgate et al (2003a). The most significant of these is the Top Latrobe Unconformity.…”

Section: Gippsland Basinmentioning

confidence: 99%

“…8) (Holdgate and Gallagher, 2003). The majority of these structures are anticlines and monoclines that have developed above ~E-W to ~NE-SW striking normal faults reactivated in compression (Holdgate et al, 2003a;Power et al, 2003). The basin experienced extensional deformation until the latest early Eocene, with growth faulting terminating just prior to the onset of compressional deformation and inversion in the Basin Deep and Northern Terrace ~52 Ma (Johnstone et al, 2001).…”

Section: Gippsland Basinmentioning

confidence: 99%

“…The most significant of these is the Top Latrobe Unconformity. This angular (up to 5°), composite unconformity has locally removed >20 Myr of sedimentary section, and is characterised by significant topography that reflects substantial localised erosion (up to 600 m) associated with incision of the Flounder and Marlin channels (Holdgate et al, 2003a). The age of the Top Latrobe unconformity is constrained to between 44 and 40 Ma based on the ages of the sediments that fill the incised channels, whilst an earlier unconformity (the Mackerel Unconformity) is dated at 53 to 51 Ma (Holdgate et al, 2003a).…”

Section: Gippsland Basinmentioning

confidence: 99%

“…Margin wide deformation and uplift beginning around ~43 Ma (Lutetian) is recorded by regional unconformities observed in the Otway, Torquay and Gippsland basins (Holdgate et al, 2003a;McGowran et al, 2004), and by inversion structures in the western Otway Basin that witness major localised exhumation constrained by AFTA data (e.g. Duddy et al, 2003) to beginning between 55 to 40 Ma (Fig.…”

Section: Early-to-mid Eocene Deformation and Plate Tectonic Settingmentioning

confidence: 99%

See 4 more Smart Citations

Cenozoic post-breakup compressional deformation and exhumation of the southern Australian margin

Holford

Hillis²,

Duddy³

et al. 2011

The APPEA Journal

View full text Add to dashboard Cite

We present results from a margin-wide analysis of the history of post-breakup Cenozoic compressional deformation and related exhumation along the passive southern margin of Australia based on a regional synthesis of seismic, stratigraphic and thermochronological data. The Cenozoic sedimentary record of the southern margin contains regional unconformities of intraLutetian and late Miocene-Pliocene age, which coincide with reconfigurations of the boundaries of the Indo-Australian Plate. Seismic data show that post-breakup compressional deformation and sedimentary basin inversion, characterised by reactivation of syn-rift faults and folding of post-rift sediments, is pervasive from the Gulf St Vincent to Gippsland basins, and occurred almost continually since the early-to-mid Eocene. Inversion structures are absent from the Bight Basin which we interpret to be the result of both the unsuitable orientation of faults for reactivation with respect to post-breakup stress fields, and the colder, stronger lithosphere that underlies that part of the margin. Compressional deformation along the southeastern margin has mainly been accommodated by reactivation of syn-rift faults resulting in folds with varying ages and amplitudes within the post-rift Cenozoic succession. Many hydrocarbon fields in the Otway and Gippsland basins are located within these folds, the largest of which are often associated with substantial localised exhumation. Our results emphasise the importance of constraining the timing of Cenozoic compression and exhumation in defining hydrocarbon prospectivity of the southern margin.

show abstract

Section: Gippsland Basinmentioning

confidence: 98%

Section: Gippsland Basinmentioning

confidence: 99%

Section: Gippsland Basinmentioning

confidence: 99%

Section: Gippsland Basinmentioning

confidence: 99%

Section: Early-to-mid Eocene Deformation and Plate Tectonic Settingmentioning

confidence: 99%

See 3 more Smart Citations

Cenozoic post-breakup compressional deformation and exhumation of the southern Australian margin

Holford

Hillis²,

Duddy³

et al. 2011

The APPEA Journal

View full text Add to dashboard Cite

show abstract

Spatial and temporal patterns of Australian dynamic topography from River Profile Modeling

Czarnota

Roberts

White

et al. 2014

J. Geophys. Res. Solid Earth

128

View full text Add to dashboard Cite

Despite its importance, the temporal and spatial evolution of continental dynamic topography is poorly known. Australia's isolation from active plate boundaries and its rapid northward motion within a hot spot reference frame make it a useful place to investigate the interplay between mantle convection, topography, and drainage. Offshore, dynamic topography is relatively well constrained and can be accounted for by Australia's translation over the mantle's convective circulation. To build a database of onshore constraints, we have analyzed an inventory of longitudinal river profiles, which is sensitive to uplift rate history. Using independently constrained erosional parameters, we determine uplift rates by minimizing the misfit between observed and calculated river profiles. Resultant fits are excellent and calculated uplift histories match independent geologic constraints. We infer that western and central Australia underwent regional uplift during the last 50 Myr and that the Eastern Highlands have been uplifted in two stages. The first stage from 120 to 80 Ma, coincided with rifting along the eastern margin and its existence is supported by thermochronological measurements. A second stage occurred at 80–10 Ma, formed the Great Escarpment, and coincided with Cenozoic volcanism. The relationship between topography, gravity anomalies, and shear wave tomographic models suggest that regional elevation is supported by temperature anomalies within the lithosphere's thermal boundary layer. Morphology and stratigraphy of the Eastern Highlands imply that these anomalies have been coupled to the base of the plate during Australia's northward motion over the last 70 Myr.

show abstract

Observational Estimates of Dynamic Topography Through Space and Time

Hoggard

Austermann

Randel

et al. 2021

Mantle Convection and Surface Expressions

View full text Add to dashboard Cite

The Gippsland Basin Top Latrobe Unconformity, and Its Expression in Other Se Australia Basins

Cited by 18 publications

References 15 publications

Cenozoic post-breakup compressional deformation and exhumation of the southern Australian margin

Cenozoic post-breakup compressional deformation and exhumation of the southern Australian margin

Spatial and temporal patterns of Australian dynamic topography from River Profile Modeling

Observational Estimates of Dynamic Topography Through Space and Time

Contact Info

Product

Resources

About