anhydritic dolomite

简明释义

硬石膏白云岩;

英英释义

例句

1.The presence of anhydritic dolomite can indicate past environmental conditions in sedimentary basins.

无水白云岩的存在可能表明沉积盆地中的过去环境条件。

2.In the laboratory, we analyzed the mineral composition of the anhydritic dolomite sample.

在实验室中，我们分析了无水白云岩样本的矿物成分。

3.The geologist identified the rock formation as anhydritic dolomite due to its unique crystalline structure.

地质学家根据其独特的晶体结构将该岩层识别为无水白云岩。

4.During the field study, we collected several samples of anhydritic dolomite for further testing.

在野外研究中，我们收集了几份无水白云岩样本以便进一步测试。

5.The anhydritic dolomite found in this region is known for its high magnesium content.

该地区发现的无水白云岩以其高镁含量而闻名。

作文

In the study of sedimentary rocks, one term that often arises is anhydritic dolomite. This unique rock type is a variant of dolomite, which itself is a carbonate mineral composed primarily of calcium magnesium carbonate. The term 'anhydritic' refers to the absence of water in the mineral structure. Understanding anhydritic dolomite requires knowledge of both its formation and its significance in geological processes.Dolomite forms through a process called dolomitization, where limestone, primarily composed of calcite, undergoes chemical changes to convert into dolomite. This transformation typically occurs in environments where magnesium-rich fluids are present. However, when these fluids lack water, the resulting rock is classified as anhydritic dolomite. This process can happen in various geological settings, including shallow marine environments, evaporitic basins, and during the burial of sediments.The significance of anhydritic dolomite extends beyond its formation. It plays a crucial role in the petroleum industry, particularly in reservoir characterization. Many oil and gas reservoirs are found within dolostones, and understanding the properties of anhydritic dolomite can help geologists predict the behavior of hydrocarbons within these formations. The porosity and permeability of anhydritic dolomite can differ significantly from other types of dolomites due to the absence of water, making it an essential factor in resource exploration.Furthermore, anhydritic dolomite can influence the geochemistry of groundwater systems. The dissolution of this rock type can lead to the release of magnesium and other elements into groundwater, affecting water quality and ecosystem health. In agricultural contexts, the presence of anhydritic dolomite can impact soil chemistry and fertility, as the leaching of magnesium can alter nutrient availability.In terms of identification, anhydritic dolomite can be distinguished from other carbonate rocks through various methods, including thin section petrography and X-ray diffraction analysis. These techniques allow geologists to observe the mineralogical composition and structural characteristics of the rock, confirming its classification as anhydritic dolomite.In conclusion, anhydritic dolomite is a fascinating rock type that exemplifies the complexity of geological processes. Its formation through dolomitization without water highlights the dynamic nature of sedimentary environments. Moreover, its implications for natural resources and environmental health underscore the importance of understanding this mineral. As research continues, the role of anhydritic dolomite in various geological and ecological contexts will likely become even more significant, further enriching our knowledge of Earth’s geology.

在沉积岩的研究中，常常会出现一个术语——无水白云石。这种独特的岩石类型是白云石的一种变体，而白云石本身是一种主要由碳酸钙镁组成的碳酸盐矿物。术语“无水”指的是矿物结构中缺乏水分。理解无水白云石需要了解其形成过程及其在地质过程中的重要性。白云石通过一种称为白云化的过程形成，在这个过程中，主要由方解石组成的石灰岩经历化学变化转变为白云石。这一转化通常发生在富含镁的流体存在的环境中。然而，当这些流体缺乏水分时，所产生的岩石被归类为无水白云石。这一过程可以发生在各种地质环境中，包括浅海环境、蒸发盆地以及沉积物的埋藏过程中。无水白云石的重要性不仅限于其形成过程。它在石油工业中发挥着至关重要的作用，特别是在储层特征的研究中。许多油气储层位于白云岩中，理解无水白云石的特性可以帮助地质学家预测这些构造中烃类的行为。由于缺乏水分，无水白云石的孔隙度和渗透率可能与其他类型的白云石显著不同，这使其在资源勘探中成为一个重要因素。此外，无水白云石可以影响地下水系统的地球化学。该岩石类型的溶解可能导致镁和其他元素释放到地下水中，从而影响水质和生态系统健康。在农业背景下，无水白云石的存在可能影响土壤化学和肥力，因为镁的淋溶可能改变养分的可用性。在识别方面，无水白云石可以通过各种方法进行区分，包括薄片岩石显微镜观察和X射线衍射分析。这些技术使地质学家能够观察岩石的矿物成分和结构特征，从而确认其分类为无水白云石。总之，无水白云石是一种引人入胜的岩石类型，充分体现了地质过程的复杂性。它通过没有水的白云化形成，突显了沉积环境的动态特性。此外，它对自然资源和环境健康的影响强调了理解这种矿物的重要性。随着研究的不断深入，无水白云石在各种地质和生态背景中的作用可能会变得更加重要，从而进一步丰富我们对地球地质的认识。