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曾于1970年左右听到有一种说法,认为“板块运动似乎并不直接反映地幔热对流”,亦即主张地幔上升产生海岭,而不是载于热对流之上的板块运动——古典的地幔对流论的说法,道理就是地幔物质在板块的间隙中自下而上被动上升成为中央海岭.但板块之间究竟为什么出现间隙呢?这乃是板块构造学说的根本问题.研究这一问题,会起到两点重要的作用.弄清板块到底是什么?从目前说最合理的答案将是“板块乃是地幔制造出的热对流中热的边界层”.表面冷却固化的边界层(板块)的密度,应较部分熔融的下层(岩石圈)的密度大.因此板块本身重量很大.不是可浮起的物质.根据东京大学吉井敏尅等人研究得出的,随着
There was a saying around 1970 that “the plate motion does not seem to directly reflect the thermal convection of the mantle”, that is, advocating the rise of the mantle to produce a ridge rather than the plate movement contained on the convection of heat - classical mantle convection Theory, the reason is that mantle material in the plate gap from bottom to top passively rose to become the central ridge, but what exactly gap between the plates it? This is the fundamental tectonic plate tectonics theory .To study this problem, will play The two most important roles are to figure out what exactly the plate is in. The most plausible answer for now is that “the plate is the thermal boundary layer in the convection created by the mantle.” The surface-cooled, solidified boundary layer (plate) Density, should be more partial melting of the lower (lithosphere) density, so the plate itself is a huge weight, not a floating material.According to the Tokyo University Yoshihime Minki et al study, with the