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在汇聚边界,海洋地壳下降到大陆地壳之下形成复杂的构造接合带。这种接合带由海沟开始向地壳深部延伸,当两个板块相对运动时产生高地震活动带。海洋地壳下降到地球深部(称为俯冲)的地方呈现高动力特征。现代的例子有这种类似过程;出露于地表的目前是静止的古老边界的遗迹的形成过程。在俯冲带前缘(此处下降的洋壳较浅),地球物理勘探技术能够确定沉积岩层的构造。现代地震反射技术可以求出海沟沉积岩剖面上部2—6公里范围内的百米间隔。这种海沟沉积物的岩心取样深度达到0.5—1.2公里。本文侧重介绍有关现代汇聚边界前缘研究的进展。
At convergent boundaries, the oceanic crust dropped below the continental crust to form complex structural zones. This zone of joint starts from the trench to the deep crust, producing high seismic activity zones when the two plates move relative to each other. Where the oceanic crust has dropped deep into the Earth (known as subduction), it exhibits high dynamic characteristics. The modern example has such a similar process; the formation of relics on the ancient boundary that are now standing still on the surface of the earth is exposed. On the front of the subduction zone where the descending oceanic crust is shallow, geophysical prospecting techniques can determine the structure of the sedimentary strata. Modern seismic reflection techniques can be used to find the interval between two hundred and sixty meters in the upper part of the trench sedimentary rock. This trench sediment core sampling depth of 0.5-1.2 km. This article focuses on the progress of research on the frontier of the convergence of the modern world.