back arc spreading

简明释义

弧后扩张;

英英释义

例句

1.The theory of back arc spreading 后弧扩张 helps explain the formation of certain island arcs.

关于后弧扩张后弧扩张的理论有助于解释某些岛弧的形成。

2.Volcanologists are particularly interested in how back arc spreading 后弧扩张 affects magma generation.

火山学家特别关注后弧扩张后弧扩张如何影响岩浆生成。

3.Researchers are studying the effects of back arc spreading 后弧扩张 on oceanic crust formation.

研究人员正在研究后弧扩张后弧扩张对海洋地壳形成的影响。

4.The back arc spreading 后弧扩张 process is crucial for understanding plate tectonics in this area.

理解该地区的板块构造，后弧扩张后弧扩张过程至关重要。

5.The geological survey indicated that the region is experiencing back arc spreading 后弧扩张, which could lead to increased volcanic activity.

地质调查显示，该地区正在经历后弧扩张后弧扩张，这可能导致火山活动增加。

作文

The geological processes that shape our planet are both fascinating and complex. One such process is back arc spreading, which occurs in specific tectonic settings and plays a significant role in the formation of oceanic crust. Understanding this phenomenon requires a grasp of plate tectonics and the dynamics of subduction zones. In a typical subduction zone, one tectonic plate is forced under another, leading to the creation of a volcanic arc on the overriding plate. However, in certain circumstances, the area behind this volcanic arc experiences extension, leading to back arc spreading.

During back arc spreading, the lithosphere is pulled apart, allowing magma to rise from the mantle and create new oceanic crust. This process is often associated with the development of mid-ocean ridges and can result in the formation of new ocean basins over geological time scales. The concept of back arc spreading is crucial for understanding how oceanic plates interact and evolve, particularly in regions where tectonic forces are at play.

One of the most well-known examples of back arc spreading is found in the western Pacific Ocean, particularly in areas like the Mariana Trough. Here, the Pacific Plate is being subducted beneath the smaller Philippine Sea Plate, resulting in a volcanic island arc and a back arc basin characterized by extensive spreading. This region has been extensively studied by geologists, as it provides valuable insights into the processes that govern plate tectonics and the formation of oceanic features.

The significance of back arc spreading extends beyond just geological interest; it also has implications for understanding seismic activity and potential hazards. The movement of tectonic plates can lead to earthquakes, and regions experiencing back arc spreading are often associated with heightened seismicity. Researchers monitor these areas closely to better predict and mitigate the risks associated with such natural disasters.

In conclusion, back arc spreading is a vital geological process that contributes to our understanding of the Earth's dynamics. By studying this phenomenon, scientists can gain insights into the formation of oceanic crust, the behavior of tectonic plates, and the associated risks of seismic activity. As we continue to explore and learn about our planet's geology, the role of back arc spreading will remain an important area of research, shedding light on the intricate workings of the Earth beneath our feet.

塑造我们星球的地质过程既迷人又复杂。其中一个过程是后弧扩张，它发生在特定的构造环境中，并在海洋地壳的形成中发挥着重要作用。理解这一现象需要掌握板块构造和俯冲带的动态。在典型的俯冲带中，一个构造板块被迫在另一个板块之下，导致在覆盖板上形成火山弧。然而，在某些情况下，这个火山弧后面的区域经历了拉伸，导致后弧扩张。

在后弧扩张过程中，岩石圈被拉开，允许来自地幔的岩浆上升并形成新的海洋地壳。这个过程通常与中洋脊的发展相关，并且可能导致在地质时间尺度上形成新的海洋盆地。后弧扩张的概念对于理解海洋板块如何相互作用和演变至关重要，特别是在构造力量起作用的地区。

最著名的后弧扩张实例之一可以在西太平洋找到，特别是在马里亚纳海沟等地区。在这里，太平洋板块正在被较小的菲律宾海板块俯冲，导致形成火山岛弧和以广泛扩张为特征的后弧盆地。该地区已被地质学家广泛研究，因为它提供了关于控制板块构造和海洋特征形成过程的宝贵见解。

后弧扩张的重要性不仅仅限于地质兴趣；它还对理解地震活动和潜在危险有影响。构造板块的运动可能导致地震，而经历后弧扩张的地区往往与更高的地震活动有关。研究人员密切监测这些地区，以更好地预测和减轻与自然灾害相关的风险。

总之，后弧扩张是一个至关重要的地质过程，有助于我们理解地球的动态。通过研究这一现象，科学家可以深入了解海洋地壳的形成、构造板块的行为以及与之相关的地震活动风险。随着我们继续探索和了解我们星球的地质，后弧扩张的作用将仍然是一个重要的研究领域，揭示我们脚下地球的复杂运作。