CONVECTION-DRIVEN TECTONICS ON VENUS

被引:86
作者
PHILLIPS, RJ [1 ]
机构
[1] SO METHODIST UNIV, DEPT GEOL SCI, DALLAS, TX 75275 USA
来源
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS | 1990年 / 95卷 / B2期
关键词
D O I
10.1029/JB095iB02p01301
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
An analysis is presented for convective stress coupling to an elastic lithosphere as it applies to tectonic deformation on Venus. The results predict that dynamic uplift of Venusian topography must be accompanied by extensive brittle failure and viscous flow in the lithosphere. Geoid anomalies and geoid-to-topography ratios for Venusian topographic features are large compared to values for thermal swells in Earth's ocean basins; this suggests that dynamic support of topography must be an important process on Venus. Further, a low-viscosity zone is probably not present beneath the Venusian lithosphere. A comparative analysis suggests that tectonic deformation of the lithosphere associated with dynamically supported topography on Earth is unimportant. -from Author
引用
收藏
页码:1301 / 1316
页数:16
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