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首页> 外文期刊>Environmental Geology >Geochemical characteristics of the slip zones of a landslide in granitic saprolite, Hong Kong: implications for their development and microenvironments
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Geochemical characteristics of the slip zones of a landslide in granitic saprolite, Hong Kong: implications for their development and microenvironments

机译：香港花岗岩腐泥土滑坡滑带的地球化学特征：对其发育和微环境的影响

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摘要

Geochemical investigations of the slip zones of a landslide in granitic saprolite revealed that they have signatures distinct from their host materials. These distinctions include stronger Si depletion, higher Al enrichment, greater LOI, significant fixations of Mn, Ba and Ce, stronger negative Eu anomalies, and greater accumulations of other rare earth elements (REE). Altogether, these geochemical characteristics indicate that: (a) the slip zones have greater abundance of clays, consistent with field and microscopic observations; (b) concentration of clay size particles within the slip zones may have been from downward leaching and deposition, and lateral transportation of Al-Si solutions and colloids through pores and fractures within the saprolite; and (c) there were prevailing oxidation and poor drainage, and occasional reduction conditions within the slip zones. It was concluded that geochemical analyses could be effective in gathering clues for understanding the development and nature of slip zones in landslide investigations.
机译：对花岗岩腐泥土中滑坡滑移带的地球化学研究表明，它们具有与基质不同的特征。这些区别包括更强的Si耗竭，更高的Al富集，更大的LOI，Mn，Ba和Ce大量固着，更强的Eu负负异常以及其他稀土元素（REE）的积累。总的来说，这些地球化学特征表明：（a）滑移带具有大量的粘土，这与野外观察和微观观察一致； （b）滑移区内粘土颗粒的集中可能来自向下的浸出和沉积，以及铝硅溶液和胶体通过腐泥土中的孔隙和裂缝的横向输送； （c）滑移区内普遍存在氧化作用，排水不畅，偶有还原条件。结论是，地球化学分析可以有效地收集线索，以了解滑坡调查中滑带的发育和性质。

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