pleochroic halo

简明释义

多向色晕环

英英释义

例句

1.Geologists often study pleochroic halos to understand the history of radiation exposure in rocks.

地质学家经常研究偏色光晕以了解岩石的辐射暴露历史。

2.In the lab, we observed a pleochroic halo that suggested the mineral had been subjected to significant radiation over time.

在实验室中，我们观察到一个偏色光晕，这表明该矿物在一段时间内经历了显著的辐射。

3.The mineral sample displayed a striking pleochroic halo, indicating the presence of different colored zones around the radioactive inclusions.

该矿物样本展示了一个引人注目的偏色光晕，表明在放射性包裹体周围存在不同颜色的区域。

4.Research on pleochroic halos has revealed important information about the age and environment of certain minerals.

对偏色光晕的研究揭示了有关某些矿物的年龄和环境的重要信息。

5.The pleochroic halo around the zircon crystal provided insights into its geological formation conditions.

锆石晶体周围的偏色光晕为其地质形成条件提供了见解。

作文

In the fascinating world of geology and mineralogy, there are numerous concepts and phenomena that capture the imagination of scientists and enthusiasts alike. One such phenomenon is the pleochroic halo, a striking visual effect observed in certain minerals that contain radioactive inclusions. Understanding pleochroic halo not only enriches our knowledge of mineral properties but also provides insights into the geological processes that shape our planet.To begin with, the term pleochroic halo refers to the color variations that can be seen in a mineral when it is viewed from different angles, particularly in the presence of radiation. This effect is most commonly associated with minerals like biotite and muscovite, which are part of the mica group. The pleochroic halo occurs due to the interaction of light with the crystal structure of these minerals, which can absorb light differently depending on the orientation of the crystal. As a result, a single mineral specimen may display a spectrum of colors, ranging from deep greens to rich browns, depending on how it is illuminated and observed.The formation of pleochroic halo is closely linked to the presence of radioactive elements, such as uranium or thorium, within the mineral. These elements emit radiation, which causes the surrounding minerals to undergo a process known as ionization. The ionized areas around the radioactive inclusions can create localized damage to the crystal lattice, leading to the unique color patterns that characterize pleochroic halo. This phenomenon not only highlights the intricate relationship between minerals and their environments but also serves as an important indicator of geological conditions over time.Moreover, the study of pleochroic halo has practical implications in various fields, including geology, archaeology, and even nuclear science. For geologists, analyzing the characteristics of pleochroic halo can provide valuable information about the age and formation processes of rocks. By understanding the distribution and intensity of these halos, scientists can infer the history of radiation exposure and the thermal evolution of the geological formations in which they are found.In archaeology, pleochroic halo can aid in dating artifacts made from mineral-rich materials. By examining the halos present in these materials, researchers can gain insights into the environmental conditions at the time of their formation, offering clues about ancient civilizations and their interactions with the landscape. Additionally, in the realm of nuclear science, the study of pleochroic halo can help in assessing the safety and stability of materials used in nuclear reactors, as well as in understanding the long-term effects of radiation on geological formations.In conclusion, the pleochroic halo is more than just a beautiful optical phenomenon; it is a window into the complex interplay between minerals and their environments. By exploring the intricacies of pleochroic halo, we not only deepen our appreciation for the natural world but also enhance our ability to interpret the geological history of our planet. As we continue to study and understand this captivating aspect of mineralogy, we unlock the secrets of the Earth’s past and pave the way for future discoveries in the fields of science and technology.

在地质学和矿物学的迷人世界中，有许多概念和现象吸引着科学家和爱好者的想象力。其中一个现象是偏光晕，这是在某些含有放射性包裹体的矿物中观察到的显著视觉效果。理解偏光晕不仅丰富了我们对矿物特性的知识，还提供了关于塑造我们星球的地质过程的洞察。首先，偏光晕这个术语指的是当从不同角度观察矿物时可以看到的颜色变化，特别是在存在辐射的情况下。这种效应最常与黑云母和白云母等云母组矿物相关联。偏光晕的发生是由于光与这些矿物晶体结构的相互作用，这些矿物根据晶体的取向能够以不同的方式吸收光。因此，单个矿物标本可能会显示出一系列的颜色，从深绿色到丰富的棕色，具体取决于其照明和观察的方式。偏光晕的形成与矿物中放射性元素（如铀或钍）的存在密切相关。这些元素发出辐射，导致周围矿物经历一种称为电离的过程。放射性包裹体周围的电离区域可能会对晶体晶格造成局部损伤，从而导致表征偏光晕的独特颜色模式。这种现象不仅突显了矿物与其环境之间错综复杂的关系，而且还作为地质条件随时间变化的重要指标。此外，研究偏光晕在地质学、考古学甚至核科学等多个领域具有实际意义。对于地质学家来说，分析偏光晕的特征可以提供有关岩石年龄和形成过程的宝贵信息。通过了解这些晕的分布和强度，科学家可以推断辐射暴露的历史以及它们所在地质构造的热演化。在考古学中，偏光晕可以帮助对由富含矿物材料制成的文物进行年代测定。通过检查这些材料中存在的晕，研究人员可以获得有关其形成时环境条件的见解，为古代文明及其与景观的互动提供线索。此外，在核科学领域，对偏光晕的研究可以帮助评估用于核反应堆的材料的安全性和稳定性，以及理解辐射对地质构造的长期影响。总之，偏光晕不仅仅是一种美丽的光学现象；它是矿物与其环境之间复杂相互作用的窗口。通过探索偏光晕的细微差别，我们不仅加深了对自然世界的欣赏，还增强了我们解释地球地质历史的能力。在我们继续研究和理解这一迷人的矿物学方面时，我们揭开了地球过去的秘密，并为未来在科学和技术领域的发现铺平了道路。