calcic-alkalic plagioclase

简明释义

1. 钙纳长石; 2. 钙碱性长石;

英英释义

例句

1.In the petrology course, we learned how to identify calcic-alkalic plagioclase 钙碱性斜长石 in thin sections of rocks.

在岩石学课程中，我们学习了如何在岩石的薄片中识别calcic-alkalic plagioclase 钙碱性斜长石。

2.The presence of calcic-alkalic plagioclase 钙碱性斜长石 suggests a high temperature of formation for the granite sample.

样品中存在calcic-alkalic plagioclase 钙碱性斜长石表明该花岗岩样品的形成温度较高。

3.Researchers found that calcic-alkalic plagioclase 钙碱性斜长石 plays a crucial role in the evolution of alkaline magmas.

研究人员发现calcic-alkalic plagioclase 钙碱性斜长石在碱性岩浆的演化中起着至关重要的作用。

4.The study revealed that the volcanic rock contained significant amounts of calcic-alkalic plagioclase 钙碱性斜长石, indicating a specific formation environment.

研究显示，这种火山岩中含有大量的calcic-alkalic plagioclase 钙碱性斜长石，这表明了一种特定的形成环境。

5.Geologists often analyze calcic-alkalic plagioclase 钙碱性斜长石 to understand the crystallization processes of igneous rocks.

地质学家常常分析calcic-alkalic plagioclase 钙碱性斜长石以理解火成岩的结晶过程。

作文

The study of igneous rocks reveals a fascinating array of mineral compositions, one of which is calcic-alkalic plagioclase. This term refers to a specific type of plagioclase feldspar that exhibits both calcic and alkalic characteristics. Understanding calcic-alkalic plagioclase is essential for geologists who seek to comprehend the formation processes and evolutionary history of various geological environments. Plagioclase feldspar is a critical component of many igneous rocks, especially those formed in volcanic environments. It is a solid solution series between two end-member minerals: albite (sodium-rich) and anorthite (calcium-rich). The term 'calcic' indicates a higher concentration of calcium, while 'alkalic' suggests a presence of sodium and potassium. Therefore, calcic-alkalic plagioclase falls within a specific range of this solid solution, often found in rocks that have undergone varying degrees of crystallization and differentiation. Geologically, calcic-alkalic plagioclase is commonly observed in basaltic and andesitic lavas, which are characterized by their relatively low silica content compared to more evolved rocks like rhyolites. The presence of calcic-alkalic plagioclase in these rocks can provide insights into the magma's origin and the tectonic setting in which it formed. For instance, calcic-alkalic plagioclase is frequently associated with subduction zones, where oceanic plates descend beneath continental plates, leading to the generation of magma rich in both calcium and alkali elements. Moreover, the crystallization of calcic-alkalic plagioclase occurs at specific temperatures and pressures, making it a valuable indicator for understanding the thermal history of a given rock body. By studying the textures and compositions of calcic-alkalic plagioclase grains, geologists can infer the cooling rates of the magma and the conditions under which the crystals formed. This information is crucial for reconstructing past volcanic activity and assessing potential hazards in regions prone to eruptions. In addition to its geological significance, calcic-alkalic plagioclase also plays a role in economic geology. Some deposits containing this mineral can be valuable sources of aluminum and other industrial minerals. Understanding the distribution and formation of calcic-alkalic plagioclase can thus contribute to resource exploration and mining efforts. In conclusion, the term calcic-alkalic plagioclase encapsulates a specific category of plagioclase feldspar that is integral to the study of igneous rocks. Its unique properties and formation conditions provide critical insights into geological processes and the evolution of the Earth's crust. As geologists continue to explore the complexities of mineral compositions, calcic-alkalic plagioclase will undoubtedly remain a focal point of research, enriching our understanding of the planet’s dynamic systems.

对火成岩的研究揭示了多种矿物成分，其中之一是钙碱性斜长石。这个术语指的是一种特定类型的斜长石长石，表现出钙和碱的特征。理解钙碱性斜长石对于地质学家来说至关重要，他们试图理解各种地质环境的形成过程和演化历史。斜长石长石是许多火成岩的重要组成部分，特别是在火山环境中形成的岩石。它是两种端元矿物之间的固体溶液系列：铝长石（富含钠）和斜方石（富含钙）。术语“钙性”表示钙的浓度较高，而“碱性”则表明存在钠和钾。因此，钙碱性斜长石落在这一固体溶液的特定范围内，通常出现在经历了不同程度结晶和分异的岩石中。从地质学的角度来看，钙碱性斜长石通常在玄武岩和安山岩熔岩中观察到，这些岩石的特点是相对低的二氧化硅含量，与更演化的岩石如流纹岩相比。钙碱性斜长石在这些岩石中的存在可以提供关于岩浆起源和形成的构造背景的见解。例如，钙碱性斜长石经常与俯冲带相关联，在那里，海洋板块在大陆板块下沉，导致富含钙和碱元素的岩浆生成。此外，钙碱性斜长石的结晶发生在特定的温度和压力下，使其成为理解给定岩体热历史的宝贵指标。通过研究钙碱性斜长石颗粒的纹理和成分，地质学家可以推断岩浆的冷却速率及晶体形成的条件。这些信息对于重建过去的火山活动和评估易发喷发地区的潜在危险至关重要。除了其地质意义外，钙碱性斜长石在经济地质学中也发挥着作用。一些含有这种矿物的矿床可以是铝和其他工业矿物的宝贵来源。因此，理解钙碱性斜长石的分布和形成可以有助于资源勘探和采矿工作。总之，术语钙碱性斜长石概括了一类特定的斜长石长石，它对火成岩的研究至关重要。其独特的性质和形成条件为理解地质过程和地壳演化提供了关键见解。随着地质学家继续探索矿物成分的复杂性，钙碱性斜长石无疑将继续成为研究的重点，丰富我们对地球动态系统的理解。