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中文摘要：
为了解大别山北麓自中更新世以来黄土-古土壤的沉积环境及物质来源,对其地球化学元素进行了测定。结果表明,研究区沉积物的地球化学元素组成具有富硅、铝、铁,贫钙,低钠、镁、钾、钡、锶的特点。通过对气候特征元素变化的进一步分析,表明大别山北麓自中更新世以来是以温湿为主且从老至新气候由温湿向干冷趋势发展,与洛川黄土相比,大别山黄土经历了更强烈的化学风化作用。选择化学性质稳定的Ti、Sc、Th、Nb作为参比元素,运用富集因子法进行地球化学元素研究进而判别物质来源,结果表明,大别山北麓黄土-古土壤与洛川黄土同源,均来自西北的风尘堆积。
英文摘要：
In order to understand the sedimentary environment and provenance of the loess-palaeosols from the northern slope of Dabie Mountain,the geochemical elements are determined.The result indicates that it is rich in SiO2,Al2O3,Fe2O3 and poor in CaO,Na2O,MgO,K2O,Ba,and Sr.The studies of geochemistry characteristic and their curves show that Dabie Mountain is characterized with hot humid regional climate and the climate is changing with fluctuation from warm humid in the early stage into cool dry in the late stage.By comparative analysis,Dabie Mountain loess-palaeosols shows stronger weathering properties comparing with Luochuan loess.Taking stable chemical elements such as Ti,Sc,Th,Nb and Co as reference element,the provenance of the loess-palaeosols from the northern slope of Dabie Mountain is analyzed by enrichment factor.The results of research indicate that the source of the loess-palaeosols from the northern slope of Dabie Mountain is the same as Luochuan loess.So it is concluded that they come from the northwest aeolian-dust deposit.
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