Crustal analysis of Venus from Magellan satellite observations at Atalanta Planitia, Beta Regio, and Thetis Regio
نویسندگان
چکیده
منابع مشابه
Structural and Kinematic Analysis of Eastern Ovda Regio,Venus: Implications for Crustal Plateau Formation
Crustal plateaus on Venus constitute one of that planet’s most intriguing tectonic features. They host so-called “tessera” terrain, or deformed crust exhibiting two or more sets of intersecting tectonic lineaments, which comprises ∼8% of Venus’ surface. Major questions surrounding crustal plateaus and tessera terrain include: (1) What is the nature of crustal plateau deformation? What structure...
متن کاملVenus: volcanism and rift formation in Beta regio.
A new high-resolution radar image of Beta Regio, a Venus highland area, confirms the presence of a major tectonic rift system and associated volcanic activity. The lack of identifiable impact craters, together with the apparent superposition of the Theia Mons volcanic structure on the rift system, suggest that at least some of the volcanic activity occurred in relatively recent geologic time. T...
متن کاملGeology and Structure of Beta Regio, Venus' Results from Arecibo Radar Imaging
Arecibo radar images of a portion of the equatorial region of Venus provide the first high resolution (1.5to 2.0kin) synoptic coverage of Beta Regio. Within this area, tessera, complex deformed terrain, is identified as a major 40' geologic unit with the largest region corresponding to a plateau on the east flank of the highland. Three models are proposed to explain the origin and evolution of ...
متن کاملBeta Regio, Venus: Evidence for uplift, rifting, and volcanism due to a mantle plume
Geophysical data have led to the interpretation that Beta Regio, a 2000×25000 km wide topographic rise with associated rifting and volcanism, formed due to the rise of a hot mantle diapir interpreted to be caused by a mantle plume. We have tested this hypothesis through detailed geologic mapping of the V-17 quadrangle, which includes a significant part of the Beta Regio rise, and reconnaissance...
متن کاملUplift of Beta Regio: Three-dimensional models
[1] Three-dimensional models of the uplift of Beta Regio caused by a mantle plume satisfy constraints on gravity, topography, rheology, and the uplift rate substantially better than two-dimensional models. In particular, the uplift time of Beta Regio is reduced to an acceptable 800 million years. Three-dimensional models give the plume formation depth around 3000 km, which approximately corresp...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research: Planets
سال: 1999
ISSN: 0148-0227
DOI: 10.1029/1999je900007