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解释已有的地球物理和地质数据,最重要的问题之一是:当涉及到断裂带时,岩浆储量便降低。在这意义上,“岩浆储量”这一术语可用以描述输送到每一扩张中心下的岩浆房或岩浆通道的岩浆的数量。这一量的变化的起因可能是地幔部分融熔和/或熔浆提取效率的差异。岩浆贮量的降低被认为有下列原因:1.地壳变薄(由地震折射确定和由地震反射研究推测);2.地壳玄武质熔岩壳厚度降低,辉长质岩石和蛇纹石化橄榄岩出露;3.某种地球化学效应(由断裂带附近喷出的玄武岩砚察得知)。海底扩张过程中产生的地壳扰动被认为是热边
Interpretation of existing geophysical and geological data, one of the most important issues is: when it comes to fracture zones, magmatic reserves will be reduced. In this sense, the term “magma reserve” can be used to describe the amount of magma delivered to the magma chamber or magma passage under each expansion center. This amount of variation can be attributed to differences in mantle partial melting and / or slurry extraction efficiency. The reduction of magmatic reserves is believed to be due to the following reasons: 1. The crust is thinned (determined by seismic refraction and speculated by seismic reflection studies); 2. The crustal basaltic lava crust is reduced in thickness, and the gabbro and serpentinized peridotites are exposed ; 3. Some kind of geochemical effect (known by the basalt rock explosion erupting near the fault zone). The crustal disturbances that occur during the seafloor expansion are considered hot sides