• 责任者：Shi Huanzhi (College of Resources and Environmental Sciences ; Nanjing Agricultural University ; Nanjing 210095 ; China) ; Li Fuchun
• 刊名：Geology in China
• 出版年：2011
• 卷期：38(5)
• 关键词：黄土 ; loess ; 古土壤 ; paleosols ; 有机碳 ; organic carbon ; 陕西 ; Shaanxi Province
• 页码：p.1355-1362
• 图表：6 illus., 1 table, 17 refs.
• 分类号：1400
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

The total organic carbon (TOC) and its major components, i.e., stable organic carbon (StOC), mineral-protected organic carbon (MOC), and chemical resistant organic carbon (COC), were analyzed for both loess and paleosol layers in Luochuan profile, and the correlations between the clay particle content, clay mineral content and TOC content were studied. The results are as follows: 1) the content of TOC is higher in paleosol(except for S4) than in loess; 2) the loess and paleosol needed different time spans to reach the stabilization of the values of TOC; 3) the clay particle content is well correlated with TOC content and COC content(r=0.46, r=0.54), whereas the slit content and the fine sand particle content are poorly corrected with TOC content and COC content; and 4) kaolinite content is highly correlated with TOC content and COC content (r=0.74, r=0.61), whereas illite and montmorillonite are not correlated or poorly correlated with TOC content and COC content.