[1] The seafloor is characterized by numerous seamounts and oceanic islands which are mainly volcanic in origin. Relatively few of these features (< 0.1%), however, have been dated, and so little is known about their tectonic setting. One parameter that is sensitive to whether a seamount formed on, near, or far from a mid-ocean ridge is the elastic thickness, Te, which is a proxy for the long-t...

This paper searches for a connection between volcanoes and solar variability. Solar events have been investigated as possible interference with hazardous natural on Earth. The first results pointed out that during the minimum, frequency strength of increased. However, variability is not only factor disturbing volcanic eruptions; there also seasonality. There double from Sun volcanoes, one cycle...

We explore the connections between crustal shortening, volcanism, and mantle dynamics in Atlas of Morocco. In response to compressional forces strain localization, this intraplate orogen has evolved far from convergent plate margins. Convective effects, such as lithospheric weakening plume-related contributed important ways building high topography. seek better understand how processes interact...

The range of surface ages on Venus and the rate of recent volcanism are two major questions that can be addressed through an analysis of Magellan images. We report on a 3-D Monte Carlo resurfacing model that seeks to explain the resurfacing history of Venus by simulating the evolving surface under the competing processes of impact cratering and volcanism. By incorporating the observed size dist...

The time around 3.7 Ga ago was an epoch when substantial changes in Mars occurred: a substantial decline in aqueous erosion/degradation of landscape features; a change from abundant phyllosilicate formation to abundant acidic and evaporitic mineralogy; a change from olivine-rich volcanism to olivine-pyroxene volcanism; and maybe the cessation of the martian dynamo. Here I show that Mars also ex...

Abstract Intraplate basaltic volcanism commonly exhibits wide compositional ranges from silica-undersaturated alkaline basalts to silica-saturated tholeiitic basalts. Possible mechanisms for the transition involve variable degrees of partial melting a same source, decompression at different mantle depths (so-called ‘lid effect’), and melt-peridotite interaction. To discriminate between these me...

Regional tectonism and volcanism affect crater modification and crater loss on Venus, but a comparison of Venusian craters to lunar floor-fractured craters uggests that a third style of more localized, crater-controlled magmatism also may occur on Venus. Based on lunar models for such magmatism, Venusian crustal conditions hould generally favor crater-filling volcanism over crater-centered floo...