Igneous and tectonic evolution of Venusian and terrestrial coronae

Computer Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Domes (Geology), Earth Surface, Lava, Lithosphere, Magma, Planetary Geology, Structural Properties (Geology), Tectonics, Venus Surface, Volcanoes, Buoyancy, Folding, Intrusion, Plumes, Stratigraphy, Venus (Planet), Volcanology

Scientific paper

A great variety of tectonic and volcanic features have been documented on Venus. It is widely appreciated that there are close spatial associations among certain types of tectonic structures and some classes of volcanic flows and constructs. Coronae are endowed with a particularly rich variety of volcanism. It is thought that coupled tectonic and volcanic aspects of coronae are cogenetic manifestations of mantle plumes. An outstanding feature of most venusian coronae is their circular or elliptical shape defined by peripheral zones of fracturing and/or folding. Some coronae are composite, consisting of two or more small coronae within a larger enclosing corona, suggesting complex histories of structured diapirism analogous in some ways to salt dome tectonics. Coronae range widely in size, from smaller than 100 km to over 1000 km in diameter. Volcanic features associated with venusian coronae include lunar-like sinuous rilles, thin lava flows, cinder cone-like constructs, shield volcanos, and pancake domes. Several types of volcanic features are often situated within or near a single corona, in many instances including land-forms indicating effusions of both low- and high-viscosity lavas. In some cases stratigraphic evidence brackets emplacement of pancake domes during the period of tectonic development of the corona, thus supporting a close link between the igneous and tectonic histories of coronae. These associations suggest emplacement of huge diapirs and massive magmatic intrusions, thus producing the tectonic deformations defining these structures. Igneous differentiation of the intrusion could yield a range of lava compositions. Head and Wilson suggested a mechanism that would cause development of neutral buoyancy zones in the shallow subsurface of Venus, thereby tending to promote development of massive igneous intrusions.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Igneous and tectonic evolution of Venusian and terrestrial coronae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Igneous and tectonic evolution of Venusian and terrestrial coronae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Igneous and tectonic evolution of Venusian and terrestrial coronae will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1138483

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.