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,月球的引力主要影响潮汐等现象,与地幔运动关系不...
The driving force behind plate tectonics is convection in the mantle. Hot material near Earth's core rises, and colder mantle rock sinks. "It's kind of like a pot boiling on a stove," said Van der Elst. Meanwhile, geologists imagine the plates above this roiling mantle as bumper cars; ...
How do plates move where convection currents are rising? Where does the heat that drives mantle convection come from? Who discovered convection currents? What is the pressure of the Earth's mantle? How do scientists know there is convection in the mantle?
The motion of Earth's tectonic plates is the surface expression of mantle convection beneath. Analytical convection models have attempted to relate observables, such as plate velocities and surface heat flow, with the thermo‐mechanical state of the mantle, and remain deeply influential in global ...
How does the mantle affect the Earth's crust? What is the density of the upper mantle? What are the three main layers of Earth? What are convection currents in the Earth's mantle? What system includes the core, mantle, and crust of the Earth?
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The extreme radiogenic isotope compositions seen in Sao Miguel are dominantly a result of age rather than extreme parent daughter fractionation, and the rarity of such signatures reflects the efficiency of mantle convection in either hiding or homogenising similar compositions. 展开 ...
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 ...
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. ...
Numerical simulations of two-dimensional time-dependent thermal convection in a Boussinesq, isoviscous, infinite Prandtl number fluid with isothermal, stre... SA Weinstein,PL Olson,DA Yuen - 《Geophysical Fluid Dynamics》 被引量: 85发表: 1989年 Magnetic and viscous coupling at the core—mantle bou...