Mobility sequence of chemical elements during loess weathering-pedogenesis, Weinan, shaanxi province, China

摘要

The distribution of chemical elementsin the Weinan loess section shows that:(1) carbonate is the critical constituent affecting loess chemistry. The leaching of carbonates may cause "apparent" enrichment of some other constituents. (2)CaCO_3, SiO-2, FeO, MgO, K_2O and NaO are mobile while Al_2O_3, Fe_2O_3 and TiO_2 are inert components. The mobility se- quence may follow the order of CaCO_3 > FeO > MgO > Na_2O > K_2O > SiO_2 > Al_2O_3 > TiO_2 > Fe_2O_3.