Anortosite_Manuscritp

Weathering of anorthosite saprolites and their influence on soil formation and mineralogy in the Borborema province, northeastern Brazil
Our study explores regoliths formed from the weathering of anorthosite, a rock of significant interest in earth sciences concerning surface processes.
Utilizing an interdisciplinary approach, our research investigates the interface between the lithosphere and the pedosphere by combining saprolithology and pedology. We selected representative regolith profiles in a stable landscape with minimal anthropogenic interference.
Among the primary novelties, we highlight that the main pedogenetic process forming soils derived from anorthosite is clay enrichment, primarily through the weathering of plagioclases. Additionally, our findings reveal that the porosity system of the saprolite significantly influences the intensity of pedogenetic processes and the formation of clay minerals, leading to soil differentiation, we described the first evidence of smectite formation in soils from this rock in tropical regions.
Thus, this methodology provided valuable insights into soil formation processes occurring throughout the entire anorthosite regolith, emphasizing the importance of the interdisciplinary whole regolith approach.

本研究探讨巴西东北部博罗雷马省中，由正长石片麻岩风化形成的风化壳及其对土壤形成和矿物学的影响。我们的研究采用跨学科方法，通过结合片麻岩学和土壤学，探究地壳与土壤圈之间的界面。在人类活动干扰极小的稳定景观中，我们选取了具有代表性的风化壳剖面。在众多创新发现中，我们强调，形成来自正长石的土壤的主要成土过程是粘土富集，主要通过斜长石的风化实现。此外，我们的研究结果揭示，片麻岩的孔隙系统显著影响成土过程的强度和粘土矿物的形成，导致土壤分异。我们描述了该岩石在热带地区土壤中首次发现蒙脱石形成的证据。因此，这种方法为我们提供了对整个正长石风化壳土壤形成过程的宝贵见解，强调了跨学科整体风化壳方法的重要性。