dc.contributor.author |
Ghent, Rebecca R. |
en |
dc.contributor.author |
Tibuleac, Ileana M. |
en |
dc.date.accessioned |
2008-10-28T18:00:45Z |
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dc.date.available |
2008-10-28T18:00:45Z |
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dc.date.issued |
2002 |
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dc.identifier.citation |
Ghent, Rebecca R. and Tibuleac, Ileana M. 2002. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F6366">Ribbon spacing in Venusian tessera: Implications for layer thickness and thermal state</a>." <em>Geophysical Research Letters</em>. 29 (20):2000–2000. |
en |
dc.identifier.issn |
0094-8276 |
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dc.identifier.uri |
http://hdl.handle.net/10088/6366 |
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dc.description.abstract |
We report on measurements of characteristic extensional wavelength represented by ribbons in Venusian tessera terrain. Fourier power spectra for ribbons in 35 areas from 9 geographic regions show dominant wavelengths of 2 to 6 km. We used these values to estimate mechanical layer thickness during ribbon formation at 0.6 to 2.9 km. Because ribbons accommodate extension of a single strong layer overlying a ductile substrate, we conclude that the base of this mechanical layer corresponded to the local brittle-ductile transition (BDT) during ribbon formation. Maintaining a BDT at <3 km depth for a significant length of time requires a locally hot environment, as over a plume impinging on thin lithosphere. These results indicate that locally hot conditions prevailed at widely distinct locations in the past. |
en |
dc.format.extent |
175868 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en_US |
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dc.relation.ispartof |
Geophysical Research Letters |
en |
dc.title |
Ribbon spacing in Venusian tessera: Implications for layer thickness and thermal state |
en |
dc.type |
Journal Article |
en |
dc.identifier.srbnumber |
71489 |
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rft.jtitle |
Geophysical Research Letters |
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rft.volume |
29 |
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rft.issue |
20 |
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rft.spage |
2000 |
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rft.epage |
2000 |
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dc.description.SIUnit |
NASM |
en |
dc.description.SIUnit |
NASM-CEPS |
en |
dc.citation.spage |
2000 |
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dc.citation.epage |
2000 |
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