The development of stylolites, from small-scale heterogeneities to multi-scale roughness

在这个项目中，我们的目的是了解花柱石形成的原因和它们的粗糙度。其目的是表征针纹岩的粗糙度，并利用这些信息来提取针纹岩形成时的条件，即主岩的压实量、针纹岩形成时的应力和压实率。花柱石在自然界中非常常见，具有相当大的经济价值，但人们对其表面粗糙度的增长知之甚少。这一研究结果可以提高风云石在构造和盆地分析中的有用性。我们的方法包括三个方面：1)研究整个形状范围内天然线纹石的标度特性；2)研究线纹岩寄主岩石的颗粒分布(EBSD)和化学变化；3)利用EBSD和化学分析数据对线纹岩粗化进行数值模拟，并将数值统计与自然图样进行比较。这将使我们更透彻地了解花柱石的发育，我们计划利用这些信息来开发花柱石作为微构造分析的新工具。

In this project we aim to obtain an understanding of the reasons for the development of stylolites and their roughness. The goal is to characterize the roughness of stylolites and use this information to extract conditions at stylolite formation, namely the amount of compaction of the host-rock, the stress at stylolite formation and compaction rates. Stylolites are very common in nature and are of considerable economic interest but little is known about the growth of their surface roughness. The results of this study can enhance the usefulness of styolites for tectonic- and basin analysis. Our approach is threefold: 1) to study the scaling properties of natural stylolites across the whole range of shapes, 2) to study the grain distribution (EBSD) and chemical variation of the stylolite host-rock and 3) to perform numerical simulations of stylolite roughening using data from EBSD and chemical analysis and compare the statistics of the numerical with the natural patterns. This will lead to a more thorough understanding of the development of stylolites and we plan to use this information to develop stylolites as a new tool in microtectonic analysis.