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On weathering understanding and its characterization by petrographic indices: a study case about the criterion establishment for the texturai classification of rock-forming minerals under weathering

机译：岩体指数的风化理解及其表征：一种关于风化下岩石成型矿物质Texturai分类标准建立的研究案例

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摘要

Several studies have addressed the elaboration of petrographic indices, applicability, and their execution in the characterization of weathering grades. Petrographic indices directly depend on a visual criterion used to distinguish fresh mineral from weathered mineral, which is usually not shown. As investigated, this causes a lack of coherence among petrographic indices data for mechanical properties estimation aiming at engineering geology applications. This paper involved a readjustment of technique for the calculation of weathering indices and the establishment of criteria to gather the minerals under weathering into the petrographic index's formula based on a standardized classification of textural and micromorphological modifications. The results have shown that varying the criteria influence indices values for the same physical-mechanical properties, resulting in different types of best-fit lines, but with reasonable coefficients of determination along the weathering grades. This in part explains the variability of literature correlations. The use of a standardized classification of rock-forming minerals contributed to finding closely related mechanical degradation tendencies among literature data.
机译：若干研究已经解决了阐述了岩石指数，适用性及其在风化成绩的表征时的执行。岩帘指数直接取决于用于区分新鲜矿物的视觉标准，该矿物通常未显示出来的风化矿物质。如研究所示，这导致岩手索引数据缺乏连贯性，用于瞄准工程地质应用的机械性能估计。本文涉及重新调整用于计算风化指数的技术以及建立标准，以基于纹理和微晶修饰的标准化分类，将矿物质的矿物质收集到岩体指数的配方中。结果表明，改变标准对相同物理机械性能的指数值改变，导致不同类型的最佳拟合线，但是沿着风化等级的合理系数系数。这部分地解释了文献相关性的变化。使用标准化的岩石形成矿物分类有助于在文献数据中找到密切相关的机械降解趋势。

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