A. The rotation of the Earth. B. The gravitational pull of the Moon. C. Convection currents in the mantle. D. The impact of asteroids. 相关知识点: 试题来源: 解析 C。解析:地幔中的对流运动是地幔运动并导致地球表面变化的主要原因。A选项,地球的自转不是地幔运动的主要原因;B选项,月球的引力主要...
Key Points: We derive new scaling laws for the sluggish‐lid mantle convection modes with the aid of a new non‐dimensional numberThe stability of these modes is established, which reveals that one of these regimes is thermodynamically stableWe construct a phase space regime diagram fo...
What layer of the Earth is part crust and part mantle? How do plate tectonics affect ocean currents? Is convection related to deep ocean currents and thermohaline circulation? What is a trench in plate tectonics? What is a plate in plate tectonics?
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In order to take the next step in a more accurate interpretation of this data, a forward model is needed that delimits the bounds of chemical variability and isotopic correlations expected to arise from the major processes operative during terrestrial mantle convection. In this talk, we will ...
The Earth, our home planet, is geologically active. The upper layer of the Earth, called the crust, is broken into several pieces, which are constantly moving, giving rise to new land or destroying it. The crust floats on a huge lake of lava called t...
aGeodynamics is a subfield of geophysics dealing with dynamics of the Earth. It applies physics, chemistry and mathematics to the understanding of how mantle convection leads to plate tectonics and geologic phenomena such as seafloor spreading, mountain building, volcanoes, earthquakes, faulting and so...
Convection currents are circulation patterns that occur in the atmosphere, ocean, and the Earth's mantle as a result of this flow. Convection is the movement of gas caused by the flow of heated materials. The matter is present around in different forms solid, liquid, and gas. ...
The Terra project at the University of Liverpool run computational simulations of the Earths ' mantle on the RAY T3E-200E at Manchester. The data from the simulations is distributed over a unique and complex grid structure. We will present the results of our work for this group in providing ...
“The germanate is an analogue for the silicate. So, we expect to see a silicate eight-coordinated phase in the deep mantle of large super-earth planets. Having an eight-coordinated phase suggests a tighter, denser crystal structure.”