Mathematics – Logic
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991em%26p...53..109a&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 53, May 1991, p. 109-116.
Mathematics
Logic
1
Domes (Geology), Earth Surface, Miranda, Satellite Surfaces, Structural Properties (Geology), Venus Surface, Planetary Structure, Solar System, Stress Distribution, Taylor Instability, Thermal Analysis, Volcanoes
Scientific paper
A comparison is made of Venus and Miranda coronas and the earth ovoidal structures suggesting that Venusian coronas, thermal structures associated with important compressional fields, could be compared to Archaean gneiss domes. All the structures compared to coronas (thermal diapirs, hotspots, salt diapirs, ring complexes) begin as Rayleigh-Taylor instabilities, i.e., low density 'drops' rising or sinking through the earth lithosphere, following a lithological (salt diapirs) or thermal instability (other cases). The salt diapir hypothesis appears to be invalid for Venus due to the presence of frequent volcanic reliefs in and around the coronas. On earth, volcanic constructs are associated with hotspots, although on the continents hotspots are inclined to form thermal domes (as in East Africa) and are also crowned with volcanoes.
Anguita Francisco
Chicarro Agustin F.
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