Evidence for retrograde lithospheric subduction on Venus

Details Evidence for retrograde lithospheric subduction on Venus Evidence for retrograde lithospheric subduction on Venus

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sci...257..766s&link_type=abstract

Science (ISSN 0036-8075), vol. 257, no. 5071, Aug. 7, 1992, p. 766-770.

Other

41

Lithosphere, Planetary Geology, Subduction (Geology), Tectonics, Venus (Planet), Planetary Mantles, Topography

Scientific paper

Annular moats and outer rises around large Venus coronas such as Artemis, Latona, and Eithinoha are similar in arcuate planform and topography to the trenches and outer rises of terrestrial subduction zones. On earth, trenches and outer rises are modeled as the flexural response of a thin elastic lithosphere to the bending moment of the subducted slab; this lithospheric flexure model also accounts for the trenches and outer rises outboard of the major coronas on Venus. Accordingly, it is proposed that retrograde lithospheric subduction may be occurring on the margins of the large Venus coronas while compensating back-arc extension is occurring in the expanding coronas interiors. Similar processes may be taking place at other deep arcuate trenches or chasmata on Venus such as those in the Dali-Diana chasmata area of aestern Aphrodite Terra.

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