淮河源区中更新世黄土堆积的元素地球化学特征及其古气候意义

利用地球化学元素分析方法,对淮河源区中更新世黄土、古土壤剖面含有的化学元素及多种化学元素指标进行了分析。研究表明:区内中更新世以来的气候变化,主要以湿热气候为主,淋溶及氧化作用较强;表现在气温上HT-1~HT-3的气温较低,HT-4~HT-7的气温高,HT-8的气温又相对较低,其变化趋势表现为中更新世经历了从早期寒冷转湿热转温干,中期凉干转暖湿到晚期温湿转暖湿。

Geochemical Changes in Source Area of Huaihe River and Its Implications for Variations of Paleoclimate in Middle Pleistocene

By geochemical analysis,the chemical elements and a variety of chemical element indicators contained in the Middle Pleistocene Epoch loess-paleosoil sequence of the source area of Huaihe River are analyzed.It is found that since Middle Pleistocene Epoch the climate change of the region is dominated by hot humid climate,strong oxidation and leaching and shows lower temperature during HT-1~HT-3,higher temperature during HT-4~HT-7,and relatively lower temperature during HT-8.During Middle Pleistocene Epoch,the climate experienced a change from the early cold dry to damp-heat,and a turn from middle humidity-cap to later warm and moist.