back arc

简明释义

1. 后弧; 2. 弧后;

英英释义

例句

1.Understanding the dynamics of the back arc 后弧 can help predict seismic activity.

理解后弧 back arc 的动态有助于预测地震活动。

2.The researchers discovered that the back arc 后弧 region was rich in mineral deposits.

研究人员发现，后弧 back arc 区域富含矿物沉积。

3.The formation of a back arc 后弧 is often associated with the subduction of tectonic plates.

一个后弧 back arc 的形成通常与构造板块的俯冲有关。

4.The geologists studied the volcanic activity in the region, particularly focusing on the back arc 后弧 zone.

地质学家研究了该地区的火山活动，特别关注后弧 back arc 区域。

5.In plate tectonics, a back arc 后弧 basin can form behind a volcanic island arc.

在板块构造中，后弧 back arc 盆地可以在火山岛弧后形成。

作文

The concept of a back arc is often encountered in the field of geology, particularly when discussing tectonic plate movements and volcanic activity. A back arc refers to an area of extension and volcanic activity located behind a volcanic arc, which is formed at a convergent plate boundary where an oceanic plate subducts beneath a continental plate or another oceanic plate. This geological phenomenon can lead to the formation of a back arc basin, characterized by a variety of geological features and processes. Understanding back arcs is crucial for geologists as it helps them comprehend the complex interactions between tectonic plates and the resulting geological formations.In many cases, the formation of a back arc is closely linked to the dynamics of subduction zones. As the oceanic plate descends into the mantle, it creates a significant amount of pressure and heat, which can lead to the melting of mantle materials and the subsequent rise of magma. This process not only contributes to the volcanic activity in the region but also influences the development of a back arc basin. The resulting basin can become a site for sediment accumulation, further altering the landscape and contributing to the geological diversity of the area.One of the most notable examples of a back arc is found in the western Pacific Ocean, particularly in the area surrounding the Mariana Islands. Here, the Mariana Trench serves as a prime example of a subduction zone, while the adjacent Mariana Islands represent the volcanic arc. Behind this arc lies the Mariana back arc basin, which has been the subject of extensive geological research. Scientists have discovered that the processes occurring within this basin are vital for understanding the broader implications of plate tectonics and volcanic activity in the region.The study of back arcs is not only limited to geological research but also has significant implications for understanding natural hazards. Regions with active back arc systems are often prone to earthquakes and volcanic eruptions, making it essential for scientists and local authorities to monitor these areas closely. By studying the patterns of seismic activity and volcanic eruptions associated with back arcs, researchers can develop better predictive models and risk assessments, ultimately helping to safeguard communities living in these geologically active regions.In conclusion, the term back arc encompasses a range of geological phenomena that are crucial for understanding the Earth's dynamic processes. From its role in the formation of volcanic arcs to its implications for natural hazards, the study of back arcs provides valuable insights into the intricate workings of our planet. As research continues to evolve, the importance of back arcs in the broader context of geology and tectonics will undoubtedly remain a focal point for scientific inquiry and discovery.

“back arc”这一概念常常出现在地质学领域，尤其是在讨论构造板块运动和火山活动时。“back arc”指的是位于火山弧后方的一个扩展和火山活动区域，该区域在一个海洋板块向大陆板块或另一个海洋板块俯冲的汇聚板块边界上形成。这个地质现象可以导致“back arc”盆地的形成，其特征是各种地质特征和过程。理解“back arc”对地质学家至关重要，因为它帮助他们理解构造板块之间复杂的相互作用及其产生的地质形态。在许多情况下，“back arc”的形成与俯冲带的动态密切相关。当海洋板块下降到地幔中时，会产生大量的压力和热量，这可能导致地幔材料的熔化，并随之上升的岩浆。这个过程不仅有助于该地区的火山活动，还影响“back arc”盆地的发展。形成的盆地可能成为沉积物积累的地点，进一步改变景观并促进该地区的地质多样性。“back arc”的一个显著例子可以在西太平洋找到，特别是在马里亚纳群岛周围。在这里，马里亚纳海沟是一个俯冲带的典型例子，而相邻的马里亚纳群岛则代表了火山弧。在这个弧的后面是马里亚纳“back arc”盆地，已成为广泛地质研究的主题。科学家们发现，该盆地内发生的过程对于理解板块构造和该地区火山活动的更广泛影响至关重要。“back arcs”的研究不仅限于地质研究，而且对理解自然灾害也具有重要意义。活跃的“back arc”系统区域通常容易发生地震和火山喷发，因此科学家和地方当局必须密切监测这些地区。通过研究与“back arcs”相关的地震活动和火山喷发模式，研究人员可以开发更好的预测模型和风险评估，从而帮助保护生活在这些地质活跃地区的社区。总之，“back arc”一词涵盖了一系列对理解地球动态过程至关重要的地质现象。从它在火山弧形成中的作用到它对自然灾害的影响，对“back arcs”的研究提供了对我们星球复杂运作的宝贵洞察。随着研究的不断发展，“back arcs”在地质学和构造学更广泛背景下的重要性无疑将继续成为科学探究和发现的焦点。