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.

巴西东北部博尔博雷马省（Borborema Province）斜长岩残积土风化及其对土壤形成与矿物学的影响
本研究聚焦斜长岩风化形成的风化壳（regolith）——斜长岩是地表过程相关地球科学领域极具研究价值的岩石类型。
本研究采用跨学科研究方法，结合残积岩石学（saprolithology）与土壤学（pedology），探究岩石圈（lithosphere）与土壤圈（pedosphere）之间的界面过程。研究团队在受人为干扰极小的稳定地貌区选取了具有代表性的风化壳剖面。
本研究的主要创新点包括：其一，斜长岩母质发育土壤的主要成壤过程为黏土富集，该过程主要通过斜长石（plagioclase）的风化作用实现；其二，研究发现残积土的孔隙系统显著影响成壤过程强度与黏土矿物形成，进而驱动土壤分异——本研究首次报道了热带地区该类岩石发育土壤中蒙脱石（smectite）的形成证据。
综上，本研究方法为完整斜长岩风化壳范围内的成壤过程提供了重要科学认知，凸显了全风化壳跨学科研究路径的重要价值。