Discussion on physico - mechanical properties and deformation characters of eluvial soil of granite 花岗岩残积土物理力学性质及变形特性的探讨
2.
Eluvial tantalite : eluvial tantalite is found in rubble consisting of fragments and pebbles of varied composition 残积层钽铁矿：残积层钽铁矿发现于由碎片和小鹅卵石成分的碎矿中。
3.
The tantalite mineralisation at portee appears to be associated with quartz core zones , zones of k - metasomatism and with eluvial concentrations 钽铁矿的矿物性质是由石英核心带、 k长石同化矿带和残积层部分组合而成的。
4.
( 3 ) the spatial analysis results showed that the variation of soil clay content was moderate at the direction of vertical section . the soil clay content was highest at the layer of 20 - 40cm , which showed that it is an eluvial accumulation horizon according to long - term cultivation , irrigation and rainfall ( 3 )土壤粘粒含量在垂直方向上呈中等变异，整个土体在20 - 40cm土层处的粘粒含量最高，说明土壤表层由于长期耕作、灌溉降雨，土壤粘粒含量有一个淋溶淀积过程。
