Corona Formation and Heat Loss on Venus by Coupled Upwelling and Delamination
@article{Smrekar1997CoronaFA, title={Corona Formation and Heat Loss on Venus by Coupled Upwelling and Delamination}, author={Suzanne E. Smrekar and Ellen R. Stofan}, journal={Science}, year={1997}, volume={277}, pages={1289-1294} }
Coronae are volcanotectonic features that are unique to Venus and are interpreted to be small-scale upwellings. A model in which upwelling causes delamination at the edge of the plume head, along with deformation of a preexisting depleted mantle layer, produced the full range of topographic forms of coronae. If half of the coronae are active, delamination of the lower lithosphere could account for about 10 percent of Venus9 heat loss, with another 15 percent due to upwelling. Delamination may…
114 Citations
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References
SHOWING 1-10 OF 32 REFERENCES
Mechanisms for lithospheric heat transport on Venus: Implications for tectonic style and volcanism
- Geology
- 1982
The tectonic and volcanic characteristics of the surface of Venus are poorly known, but these characteristics must be closely related to the mechanism by which Venus rids itself of internal heat. On…
Mantle convection and crustal evolution on Venus
- Geology
- 1990
Venus is probably similar to the Earth in that recycling of basaltic crust has been induced by the development of cratons: combinations of siliceous crust with high Mg:Fe mantle. Venus has less…
Evidence for Retrograde Lithospheric Subduction on Venus
- GeologyScience
- 1992
It is proposed that retrograde lithospheric subduction may be occurring on the margins of the large Venus coronae while compensating back-arc extension is occurring in the expanding coronae interiors.
Tectonics and evolution of venus.
- GeologyScience
- 1981
The global tectonics of Venus differs significantly from that of Earth, most markedly in that the surface is covered predominately by gently rolling terrain; there apparently are no features like…
Hot-Spot Evolution and the Global Tectonics of Venus
- GeologyScience
- 1991
The global tectonics of Venus may be dominated by plumes rising from the mantle and impinging on the lithosphere, giving rise to hot spots, and crust on Venus is produced by gradual vertical differentiation with little recycling rather than by the rapid horizontal creation and consumption characteristic of terrestrial sea-floor spreading.
The interaction of mantle plumes with surface thermal and chemical boundary layers: Applications to hotspots on Venus
- Geology, Physics
- 1996
Large volcanic swells on Venus are believed to be a manifestation of mantle upwelling, or hotspots. The study of these regions provides important information on the interior of the planet. Numerical…
The Geomorphology and Evolution of Hecate Chasma, Venus
- Geology
- 1996
Abstract Hecate Chasma is a discontinuous trough and fracture system extending from Atla Regio through Asteria Regio. A detailed examination of Hecate Chasma using Magellan image and altimetry data…
The spatial distribution of coronae and related features on Venus
- Geology
- 1993
Coronae are large quasi-circular geologic features that are common on Venus. They appear to be the surface tectonic and volcanic expressions of mantle diapirs that have impinged on the underside of…
Corona structures on Venus: Models of origin
- Geology
- 1987
Coronae on Venus are circular to elongate structures with maximum widths of 150–1000 km characterized by annuli of concentric ridges surrounding complex interiors. The features have raised topography…
Mean age of rifting and volcanism on Venus deduced from impact crater densities
- Geology, PhysicsNature
- 1994
UNLIKE the extensively cratered highlands of the Moon and Mars, the surface of Venus does not preserve a record of heavy bombard-ment from the early history of the Solar System1-3. Those craters that…