blastic texture

简明释义

变晶结构;

英英释义

例句

1.When studying metamorphic rocks, identifying blastic texture can help determine their formation conditions.

在研究变质岩时，识别晶粒结构可以帮助确定其形成条件。

2.In petrology, blastic texture refers to the interlocking nature of mineral grains in a rock.

在岩石学中，晶粒结构指的是岩石中矿物颗粒的互锁特性。

3.The geologist noted the presence of blastic texture in the granite sample, indicating a high degree of metamorphism.

地质学家注意到花岗岩样本中存在晶粒结构，这表明其经历了高度的变质作用。

4.The blastic texture of the marble is a result of recrystallization during metamorphism.

大理石的晶粒结构是变质过程中再结晶的结果。

5.The blastic texture observed in the schist suggests that it underwent significant pressure and temperature changes.

在片岩中观察到的晶粒结构表明它经历了显著的压力和温度变化。

作文

The study of geology reveals a vast array of textures and structures found in rocks, each telling a unique story about the Earth's history. Among these textures, the term blastic texture refers to a specific type of crystalline structure that forms during the metamorphic processes. This texture is characterized by the interlocking crystals that develop when minerals recrystallize under conditions of high pressure and temperature. Understanding blastic texture is essential for geologists as it provides insights into the conditions under which the rock was formed and its subsequent geological history.To illustrate, consider the formation of schist, a metamorphic rock known for its pronounced blastic texture. As shale undergoes metamorphism, the original clay minerals transform into larger mica crystals, resulting in the distinctive foliation seen in schist. The presence of this blastic texture indicates that the rock has experienced significant changes, including increased temperature and pressure, which promotes the growth of larger mineral grains. This process not only enhances the rock's physical properties but also affects its chemical composition, making the study of blastic texture crucial for understanding metamorphic processes.Moreover, the identification of blastic texture can help determine the metamorphic grade of a rock. Higher-grade metamorphic rocks typically exhibit more pronounced blastic textures, indicating that they have undergone more intense metamorphic conditions. For instance, gneiss, another metamorphic rock, often displays a well-developed blastic texture with alternating bands of light and dark minerals, showcasing a higher degree of metamorphism compared to schist. By studying these textures, geologists can reconstruct the metamorphic history of a region, providing valuable information about tectonic activity and the geological evolution of the Earth.In addition, blastic texture can also be observed in igneous rocks, where it refers to the texture formed by the crystallization of minerals from a molten state. In this context, the term takes on a slightly different meaning, emphasizing the importance of cooling rates and the environment in which the rock solidifies. Rapid cooling may lead to a fine-grained texture, while slower cooling allows for the development of larger crystals, contributing to a blastic texture that can be studied to infer the conditions of magma formation and ascent.In conclusion, the concept of blastic texture is integral to the field of geology, bridging the gap between mineralogy and petrology. It serves as a key indicator of metamorphic conditions and processes, allowing geologists to interpret the complex history of rocks. By examining the blastic texture in various rock types, researchers can gain a deeper understanding of the dynamic processes that shape our planet. Thus, mastering the significance of blastic texture not only enriches one's knowledge of geology but also enhances our appreciation for the intricate workings of the Earth’s crust.

地质学的研究揭示了岩石中存在着各种纹理和结构，每一种都讲述着地球历史的独特故事。在这些纹理中，术语blastic texture指的是在变质过程中形成的一种特定类型的晶体结构。这种纹理的特点是，当矿物在高压和高温条件下重新结晶时，形成的互锁晶体。理解blastic texture对于地质学家至关重要，因为它提供了有关岩石形成条件及其后续地质历史的见解。例如，考虑片岩的形成，这是一种以明显的blastic texture而闻名的变质岩。当页岩经历变质作用时，原始的粘土矿物转变为较大的云母晶体，导致片岩中独特的层理的形成。这种blastic texture的存在表明，岩石经历了显著的变化，包括温度和压力的增加，这促进了较大矿物晶体的生长。这个过程不仅增强了岩石的物理性质，还影响了其化学成分，使得研究blastic texture对于理解变质过程至关重要。此外，blastic texture的识别可以帮助确定岩石的变质级别。高变质级别的变质岩通常表现出更明显的blastic textures，表明它们经历了更强烈的变质条件。例如，花岗岩，另一种变质岩，通常展示出明显的blastic texture，具有明暗矿物交替带，显示出与片岩相比更高程度的变质。通过研究这些纹理，地质学家可以重建一个地区的变质历史，提供关于构造活动和地球地质演化的宝贵信息。此外，在火成岩中也可以观察到blastic texture，在这种情况下，它指的是矿物从熔融状态结晶形成的纹理。在这个背景下，该术语有着稍微不同的含义，强调冷却速率和岩石固化环境的重要性。迅速冷却可能导致细粒纹理，而缓慢冷却则允许较大晶体的发展，从而形成可以研究的blastic texture，以推断岩浆形成和上升的条件。总之，blastic texture的概念对地质学领域至关重要，架起了矿物学与岩石学之间的桥梁。它作为变质条件和过程的关键指标，使地质学家能够解读岩石的复杂历史。通过检查各种岩石类型中的blastic texture，研究人员可以更深入地理解塑造我们星球的动态过程。因此，掌握blastic texture的重要性不仅丰富了人们对地质学的知识，也增强了我们对地壳复杂运作的欣赏。