论文部分内容阅读
玄武岩和橄榄玄武岩上发育的土壤粘粒部分的7矿物以埃洛石为主,高岭石居次,且结晶不良。花岗闪长岩和紫色凝灰岩上发育的土壤粘粒中高岭石含量较低,结晶度也较低。其余土壤粘粒部分的高岭石含量均较高,结晶度也较高。部分剖面中有14过渡矿物。三水铝石仅出现于少数剖面中。伊利石最大量地出现于紫色凝灰岩上发育的土壤中,在其它几个母质中含较多云母的土壤中,也含有少量伊利石。橄榄玄武岩发育的土壤粘粒中含氧化铁矿物最多,以赤铁矿为主。玄武岩上发育的土壤粘粒中也含有较多的氧化铁矿物,赤铁矿和针铁矿兼而有之。第四纪红土和花岗闪长岩上发育的土壤粘粒中也有一定量的氧化铁矿物。
The 7 minerals of clay fractions developed on basalt and olivine basalts are mainly halloysite, with kaolinite secondary and poor crystallinity. The clay minerals developed on granodiorite and purple tuff have lower content of kaolinite and lower crystallinity. The clay content in the rest of the soil is higher kaolinite content, higher crystallinity. Part of the section has 14 transitional minerals. Gibbsite appears only in a few sections. Illite is most abundant in soils developed on purple tuffs and contains a small amount of illite in soils containing mica in several other parent materials. Soil clay in the development of olivine basalts contains the most iron oxide minerals, mainly hematite. Soil clay in the development of basalts also contain more iron oxide minerals, hematite and goethite both. There is also a certain amount of iron oxide minerals in soil clay developed on Quaternary lateritic and granodiorite.