Chemical Water-rock Interaction Of Basaltic Landslide

This is very important influences of water-rock interaction on the strength formation and development of landslides, that is always the research focus of many scholars. However, these studies had focused mainly on physics and mechanics water-rock interaction.It is relatively few to research on chemical water-rock interaction of the Strength formation and development of landslides. According to the research on Lannigou landslides of Yunnan Zhaotong Touzhai in this paper, analyzing the chemical composition,micro structure,dissolution mechanism of Emeishan basalt (P2β) and the characteristics of element migration on landslides area,it is explained that very important influences of water-rock interaction on the strength formation and development of landslides.The analysis results of full-chemical analysis for fresh core and saprolite shell of Emeishan basalt show that loss or enrichment of the chemical composition exhibits consistency.Reflecting different weathering degree rocks,chemical composition show a significant difference.The analysis results of casting thin sections and SEM of Emeishan basalt show that mineral composition and microstructure have a significant difference.The analysis results of solubility test of Emeishan basalt show that rain water and distilled water have certain dissolve ability for fine broken rock,have weaker dissolve ability for larger rock.The analysis results of distilled water had certain dissolve ability show that condensate in unsaturated zone have certain dissolve ability.The analysis results of leaching test of weathering crust show that element migration in weathering crust mainly concentrate surface soil of oxidizing environment, SiO2 from dissolution of aluminosilicate minerals is mainly migration element.The analysis results of spring water dynamic monitoring show that migrated component amount is controlled of spring flow,the greater spring water flow of the larger component migration.The cocentration of SiO2 in spring water always keep invariant,migration accounts for the year 28.5 percent of total migration.Hydrogeochemical modeling can be used to simulate geochemical process in groundwater system,it can reflect geochemical reaction and ionic states in groundwater system. According to the research on chemical total analysis of rain water and spring water of Yunnan Zhaotong Touzhai landslides area and thermodynamic principle.First,it is builded that component distribution model of rain water and spring water,determined the speciation forms and content of solution when the ion complexation reached equilibrium,then builded mass transfer model.According to the different on chemical total analysis of rain water and spring water,determine the exchange phase of mass transfer mode,finally, it can calculate various of minerals dissolved or precipitated volume in simulation process.