摘要
本文对浙南变质岩发育的１６个土壤剖面中氧化铁矿物的组成特性、红度与赤铁矿含量的关系及母质对铁矿物的影响等作了研究．结果表明，变质岩发育土壤的晶态氧化铁主要为针铁矿和赤铁矿，铁游离度较高（Ｂ层土壤为５１．６８％～８５．５３％），活化度较低（Ｂ层土壤为０．９５％～５．８３％）．土色常比同纬度同海拔的其它土壤红，粘粒的赤铁矿含量较高，这与变质岩中矿物晶格能低、易风化、铁释放快等有关．土壤红度与赤铁矿含量明显相关，因此根据土壤红度可粗略地估测其赤铁矿含量．
Sixteen soil profiles derived form metamorphic rock in southern Zhejiang were analyzed to clarify the mineralogical properties of the iron oxides,the relationships between redness and hematite content,and between parent material and iron oxide mineralogy. The results showed that goethite and hematite were the main crystalline iron oxides detected in B horizons studied. A high proportion (51.68 to 85.53%)of the total iron could be extracted by dithionite,and the oxalate-extractable Fe was less than 6% of the free iron in the B horizons of the samples. The hematite content in soils on metamorphic rock was more than that in other soils,this suggests that parent material influences the development of iron oxides in soils. Redness rating,as determined with Munsell colour charts, was positively correlated (r=0.8698) with hematite content. Redness rating could provide a crude estimate of hematite content in the soils.
出处
《科技通报》
1996年第1期54-58,共5页
Bulletin of Science and Technology
关键词
变质岩
土壤
红度
发育
氧化铁
发生学
iron oxide mineralogy
metamorphic rock
soil
redness rating
