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地球在漫长演变过程中积累起来的巨大热能称地热。分散的地热在一定的地质条件下富集起来,就成为可利用的地热资源——地热能。在科学地球史的早期,人们对地热的认识是建立在康德—拉普拉斯假说基础上,认为地热是地球从炽热的太阳分离出来时承袭而来的,即“残余热说”后来,人们对地热的认识是以“星云说”为依据的,认为地球起初并不热。其内部热量是在它走上独立演变过程以后,才渐渐积累起来的。主要来自两个方面:一是岩石中所含的铀、钍等放射性元素在蜕变过程中所产生的热能一是当地球内部物质接近熔融状态时,就有可能发生重物质下沉,轻物
The huge heat that the Earth has accumulated during its long evolution is called geothermal. Scattered geothermal enrichment in certain geological conditions, it becomes available geothermal resources - geothermal energy. In the early days of the science earth’s history, people’s understanding of geothermal was based on the Kant-Laplace hypothesis that geothermal was inherited when the earth was separated from the hot sun, that is, “residual heat” , People’s understanding of geothermal is based on “nebula theory”, that the Earth is not hot at first. Its internal heat is gradually accumulated after it embarked on an independent evolutionary process. Mainly from two aspects: First, contained in the rock of uranium, thorium and other radioactive elements in the process of metamorphism heat generated by the first when the Earth’s internal material near the melting state, there may be heavy material sinking, light