苏联科学院有关研究所近数十年来的研究,揭示出火山喷发不仅有破坏性力量,而且有创造性力量,并作为强大的地质因素起着重要作用。火山发育的历史,可以看出火山喷发有一个激烈向上的阶段和一个逐渐衰退阶段。前一阶段,强烈爆发震撼地球并伴之以熔岩溢出。熔岩的数量逐渐减少时,火山活动也就表现为喷出蒸气、气和火山灰。后一阶段,即停息阶段,其特点基本上可称为火山期后过程,例如长时间地从地内分离出炽热的、矿化的、有化学性质活动力的气体和热液。由火山生成的这些热液从地球内部带出各种元素,其中也包括一些金属。火山成因的这些热液,当其上升时含在其中的大部分元素沉淀在地球深部,或者 The Soviet Academy of Sciences on the Institute for decades of research revealed that volcanic eruptions not only destructive forces, but also creative forces, and as a powerful geological factors play an important role. The history of volcanic development shows that the volcanic eruptions have a fierce upward phase and a gradual decline phase. The previous stage, a strong explosion shocked the earth and accompanied by lava overflow. When the number of lava gradually decreases, the volcanic activity also appears as steam, gas and ash. The latter phase, the phase of rest, is characterized essentially as a post-volcano post-process, such as the permanent separation of glowing, mineralized, chemically active gases and hydrothermal fluids from the ground over a long period of time. These hydrothermal fluids, which are generated by volcanoes, carry various elements from within the Earth, including some metals. These hydrothermal fluids, which are caused by volcanoes, deposit most of the elements contained in these volcanoes deep in the earth as they rise, or