The tectonic history of Tasmania

Solomon, M.; Banks, Maxwell R.; Burns, K.L.; Jennings, I. B.; Spry, Alan

doi:10.1080/00167616208728530

Cited by 13 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis of longitudinal river profiles is generally applied to tectonically active regions where surface uplift rates can be estimated independently and compared with bedrock erosion rates (Schoenbohm et al, 2004, Snyder et al, 2000. Recently, Pritchard et al (2009) and Roberts and White (2010) suggested that the present--Flinders Ranges (Célérier et al, 2005) and Tasmania (Solomon et al, 1962) where this effect is considered eclipsed by shorter--wavelength tectonic processes. Tectonically induced vertical motions are generally much larger than that produced by mantle convective processes, making the latter difficult to identify (e.g.…”

Section: Introductionmentioning

confidence: 99%

Cenozoic uplift of south Western Australia as constrained by river profiles

et al. 2014

View full text Add to dashboard Cite

The relative tectonic quiescence of the Australian continent during the Cenozoic makes it an excellent natural laboratory to study recent large--scale variations in surface topography, and processes that influence changes in its elevation.Embedded within this topography is a fluvial network that is sensitive to variations in horizontal and vertical motions. The notion that a river acts as a 'tape recorder' for vertical perturbations suggests that changes in spatial and temporal characteristics of surface uplift can be deduced through the analysis of longitudinal river profiles. We analyse 20 longitudinal river profiles around the Australian continent. Concave upward profiles in northeast Australia indicate an absence of recent surface uplift. In contrast, the major knickzones within longitudinal profiles of rivers in southwest Australia suggest recent surface uplift. Given the lack of recent large--scale tectonic activity in that region, this uplift requires an explanation. Applying an inverse algorithm to river profiles of south Western Australia reveals that this surface uplift started in the Eocene and culminated in the mid--late Neogene. The surface uplift rates deduced from this river profile analysis generally agree with independent geological observations including preserved shallow--marine sediment outcrops across the Eucla Basin and south Western Australia. We show that the interplay between global sea level and long--wavelength dynamic topography associated with south Western day geometry of longitudinal river profiles contains time--dependent information pertaining to the evolution of landscape vertical motions over larger spatial and temporal scales (i.e., ~1-100+ Myr, 10-1000 km; Roberts et al., 2012) in tectonically quiescent regions. In this method, time--dependent surface uplift rates are estimated by parameterizing the elevation of a river profile as a function of its length (Pritchard et al., 2009). Indeed, surface uplift results in rapid changes in gradient near the river mouth that, over time, migrate upstream as knickpoints (Whipple and Tucker, 1999). Depending on retreat rate, knickpoints may be preserved in present--day longitudinal river profiles, providing information on past uplift events.

show abstract

Section: Introductionmentioning

confidence: 99%

Cenozoic uplift of south Western Australia as constrained by river profiles

et al. 2014

View full text Add to dashboard Cite

show abstract

“…These are Tabberabberan W.N.W. folds in the Pre-Cambrian rocks and have been regarded as break-thrusts (Spry, 1957;Solomon, 1962). All of the large scale structures shown in Text- fig.…”

Section: Devonian Structures In the Pre-cambrian Rocksmentioning

confidence: 97%

“…A meridional structural high occurs within the Tyennan Geanticline at Frenchmans Cap where the Pre-Cambrian rocks of the Frenchman Anticlinorium (Spry, 1962;Solomon, 1962) are flanked to east and west by synclinal areas. The major Palaeozoic structures, such as the King-Sophia Syncline immediately to the west and the adjacent West Coast Range Anticlinorium, trend north-south but are cut by oblique folds and faults which trend west to W.N.W.…”

Section: Devonian Structures In the Pre-cambrian Rocksmentioning

confidence: 99%

“…The major Palaeozoic structures, such as the King-Sophia Syncline immediately to the west and the adjacent West Coast Range Anticlinorium, trend north-south but are cut by oblique folds and faults which trend west to W.N.W. (Solomon, 1962).…”

Section: Devonian Structures In the Pre-cambrian Rocksmentioning

confidence: 99%

“…THE Frenchmans Cap area lies at the western edge of the Tyennan Geanticline, an important tectonic unit (Carey, 1953;Solomon, 1962). This region of Pre-Cambrian rocks acted as a positive element in the early Palaeozoic and was an emergent land mass (at least during Cambrian times) in the Tasman Geosyncline which extended throughout Eastern Australia (David, 1950, p. 694).…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Some Effects of Palaeozoic Folding on the Pre-Cambrian Rocks of the Frenchmans Cap Area, Tasmania

Spry

Gee

1964

Geol. Mag.

View full text Add to dashboard Cite

Small-scale isoclinal folds in Pre-Cambrian schists and quartzites near Frenchmans Cap, Tasmania, were formed during the PreCambrian Frenchman Orogeny but the large open folds were produced during the Devonian Tabberabberan Orogeny. The Mary Antiform (Devonian) at the Raglan Range can be " unrolled " to leave the foliations almost horizontal, indicating that the isoclinal folds were recumbent prior to the Palaeozoic.

show abstract

Chemistry of Tasmanian Inland Waters

Buckney

Tyler

1973

Intl Review of Hydrobiology

View full text Add to dashboard Cite

A few of Tasmania's several thousand lakes and rivers have been sampled in a preIiminary survey of water chemistry. They range in concentration from extremely dilute glacial lakes (TDS < I0 ppni) to hypersaline lagoons (TDS > 85";0), the majority being dilute (TDS < 50 ppm).The 3 mechanisms controlling water chemistry proposed by GIBBS (1970) are seen to operate and the 3 terminal water types showing precipitation-dominance, roclr-dominance and solubilitylimited composition are found, together with a range of intermediates. The majority of waters have seawater ionic composition or moderate geochemical modification of this.

show abstract

The tectonic history of Tasmania

Cited by 13 publications

References 0 publications

Cenozoic uplift of south Western Australia as constrained by river profiles

Cenozoic uplift of south Western Australia as constrained by river profiles

Some Effects of Palaeozoic Folding on the Pre-Cambrian Rocks of the Frenchmans Cap Area, Tasmania

Chemistry of Tasmanian Inland Waters

Contact Info

Product

Resources

About