Are Coronae Restricted to Venus?: Corona-Like Tectonovolcanic Structures on Earth

Details Are Coronae Restricted to Venus?: Corona-Like Tectonovolcanic Structures on Earth Are Coronae Restricted to Venus?: Corona-Like Tectonovolcanic Structures on Earth

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997em%26p...77..125l&link_type=abstract

Earth, Moon, and Planets, v. 77, Issue 2, p. 125-137 (1997).

Physics

Venus, Earth, Coronae, Plumes, African Plate, Venus, Earth, Coronae, Plumes, African Plate

Scientific paper

Coronae may not be tectonovolcanic features ‘unique to Venus’ because both the processes that lead to corona formation, and their final tectonovolcanic output (formation of domes, plateaus, extensional rings, etc.), are also found on Earth. Large-scale corona formation processes on Earth may be restricted (because of plate motion) but not absent. The same applies to resurfacing processes. We here suggest that at least, the early stages of corona formation can be recognized in intraplate tectonic settings on Earth. The African plate displays many Cenozoic examples of plume-related domal uplifts and volcanism (e.g., Hoggar, Tibesti, Darfur, Ethiopia). Furthermore, the east African rift system (EARS) around lake Victoria displays many striking features that resemble those of the Venus coronae associated with extensional belts. Among these are the following: (1) an overall elliptical shape; (2) the existence of a mantle plume (Kenya plume) centered beneath lake Victoria; (3) a central plateau (east African plateau); (4) an external extensional belt (the EARS east and west branches); (5) doming processes (Kenya dome); and last but not least (6) volcanism.

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