poikilitic

简明释义

英[ˌpɔɪkɪˈlɪtɪk]美[pɔɪkəˈlɪtɪk]

adj. 嵌晶结构的

英英释义

单词用法

同义词

反义词

例句

1.Grains of carbonate experienced marmorization show pseudo - hexagonal poikilitic structure with poorly developed secondary pores.

经历过碳酸盐化作用的碳酸盐颗粒显示出伪六边形的微晶结构，其次生孔隙发育不良。

2.Poikilitic in the poikiloblastic texture of metamorphic rock most concentrate in the middle part of host and the grain size of crystal is large;

变质岩中包含变品结构中的嵌晶多数集中于主晶中部，且晶粒大；

3.Poikilitic in the poikiloblastic texture of metamorphic rock most concentrate in the middle part of host and the grain size of crystal is large;

变质岩中包含变品结构中的嵌晶多数集中于主晶中部，且晶粒大；

4.In the field of petrology, identifying poikilitic textures can help classify igneous rocks.

在岩石学领域，识别斑状纹理有助于对火成岩进行分类。

5.The rock sample exhibited a poikilitic texture, indicating the presence of larger crystals within a finer-grained matrix.

该岩石样本显示出斑状的纹理，表明在较细颗粒基质中存在较大晶体。

6.During our field trip, we encountered several poikilitic basalts that sparked our interest.

在我们的实地考察中，我们遇到了一些引起我们兴趣的斑状玄武岩。

7.The poikilitic structure of the granite suggested it formed from slow crystallization.

花岗岩的斑状结构表明它是通过缓慢结晶形成的。

8.Geologists often study poikilitic rocks to understand the cooling history of magmas.

地质学家常常研究斑状岩石以了解岩浆的冷却历史。

作文

In the study of geology, understanding the various textures and structures of rocks is crucial for interpreting their formation and history. One such term that often comes up in this context is poikilitic, which refers to a specific texture found in certain igneous rocks. The poikilitic texture is characterized by larger crystals, known as phenocrysts, that are embedded within a finer-grained matrix of smaller crystals. This unique arrangement can provide valuable insights into the cooling history and conditions under which the rock formed.The formation of poikilitic rocks typically occurs during the slow cooling of magma beneath the Earth's surface. As the magma cools, larger crystals have more time to grow, resulting in the distinct appearance of these phenocrysts. For instance, a granite rock with a poikilitic texture may contain large feldspar crystals surrounded by a matrix of quartz and biotite. This contrasts sharply with other igneous textures, such as aphanitic, where the crystals are too small to be seen without magnification.One of the most fascinating aspects of poikilitic textures is how they can indicate the geological history of an area. By studying these rocks, geologists can infer the temperature and pressure conditions present during their formation. For example, if a poikilitic rock is found in a region that has undergone significant tectonic activity, it may suggest that the area was once part of a volcanic system where magma was trapped and cooled slowly over time.Moreover, the presence of poikilitic textures can also help in identifying the mineral composition of the rock. Different minerals have varying crystallization temperatures, and by analyzing the size and distribution of phenocrysts within the matrix, geologists can make educated guesses about which minerals were present during the rock's formation. This is particularly useful in economic geology, where understanding the mineral content of rocks can lead to the discovery of valuable resources like gold or copper.In addition to its scientific significance, the poikilitic texture adds aesthetic value to rocks, making them sought after by collectors and enthusiasts. The striking contrast between the large and small crystals can create visually stunning specimens that highlight the beauty of geological processes. Collectors often seek out poikilitic rocks for their unique appearances, which can serve as a testament to the intricate and dynamic nature of our planet's geology.In conclusion, the term poikilitic encapsulates a fascinating aspect of igneous rock formation that is rich in both scientific and aesthetic value. By understanding this texture, we gain deeper insights into the geological processes that shape our world. Whether through academic study or personal collection, appreciating the poikilitic texture allows us to connect with the history of the Earth and the complex systems at play beneath our feet.

在地质学研究中，理解岩石的各种纹理和结构对于解释其形成和历史至关重要。其中一个常见的术语是poikilitic，指的是某些火成岩中发现的一种特定纹理。poikilitic纹理的特点是较大的晶体，称为斑晶，嵌入在较小晶体的细粒基质中。这种独特的排列可以提供有关岩石形成的冷却历史和条件的宝贵见解。poikilitic岩石的形成通常发生在地球表面下的岩浆缓慢冷却过程中。当岩浆冷却时，较大的晶体有更多的时间生长，从而导致这些斑晶的明显外观。例如，一块具有poikilitic纹理的花岗岩可能包含大型长石晶体，周围是石英和黑云母的基质。这与其他火成纹理，如微晶纹理形成鲜明对比，在微晶纹理中，晶体太小，无法用肉眼观察。poikilitic纹理最令人着迷的方面之一是它们如何指示一个地区的地质历史。通过研究这些岩石，地质学家可以推断出形成时的温度和压力条件。例如，如果在经历过重大构造活动的区域发现了poikilitic岩石，这可能表明该地区曾经是一个火山系统的一部分，岩浆被困住并缓慢冷却。此外，poikilitic纹理的存在还可以帮助识别岩石的矿物组成。不同矿物具有不同的结晶温度，通过分析基质中斑晶的大小和分布，地质学家可以对岩石形成时存在的矿物做出合理的推测。这在经济地质学中尤为有用，了解岩石的矿物含量可以导致发现金、铜等宝贵资源。除了科学意义之外，poikilitic纹理还为岩石增添了美学价值，使其成为收藏家和爱好者所追求的对象。大晶体和小晶体之间的鲜明对比可以创造出视觉上令人惊叹的标本，突显出地质过程的美丽。收藏家常常寻找poikilitic岩石，以其独特的外观作为我们星球地质动态和复杂性的一种证明。总之，poikilitic这一术语概括了火成岩形成的一个迷人方面，其在科学和美学上都具有丰富的价值。通过理解这种纹理，我们可以更深入地洞察塑造我们世界的地质过程。无论是通过学术研究还是个人收藏，欣赏poikilitic纹理使我们能够与地球的历史以及我们脚下复杂的系统建立联系。