CAJ | 학술논문

对甘肃西峰（X）黄土剖面L1-L6共163个样品进行总有机碳（TOC）和Rock-Eval热解分析，对比分析了西峰和陕西段家坡（D）剖面L5～S5-1层段及其中趋磁细菌的正烷烃与脂肪酸组成。结果显示西峰剖面的TOC与磁化率呈良好的对数关系；两个剖面L5～S5-1层段正烷烃和脂肪酸的分布表明，黄土地区当时古气候偏干冷，黄土高原由西北而东南，古气候呈变暖趋势。西峰剖面从S5-1形成到L5堆积，其古湿度可能有一个突变，即古气候由较湿润突然转变为极干燥，而段家坡地区当时的古气候变化则可能较为缓和。
대감숙서봉（X）황토부면L1-L6공163개양품진행총유궤탄（TOC）화Rock-Eval열해분석，대비분석료서봉화협서단가파（D）부면L5～S5-1층단급기중추자세균적정완경여지방산조성。결과현시서봉부면적TOC여자화솔정량호적대수관계；량개부면L5～S5-1층단정완경화지방산적분포표명，황토지구당시고기후편간랭，황토고원유서북이동남，고기후정변난추세。서봉부면종S5-1형성도L5퇴적，기고습도가능유일개돌변，즉고기후유교습윤돌연전변위겁간조，이단가파지구당시적고기후변화칙가능교위완화。
The total organic carbon (TOC) were measured and Rock-Evalpyrogenetion were carried out for 163 loess and paleosol samples collected from Xifeng loess section, Gansu Province. Composition of n-alkanes and fatty acid were also analyzed contrastively for L5-S5-1 layer samples of both Xifeng and Duanjiapo (Shaanxi Province) sections. Good logarithmic relationship was found between TOC and magnetic susceptibility， which shows that TOC can also used as paleoclimatic proxy in loess area. It is indicated by the composition of n-alkanes and fatty acid of L5-S5-1 layers of both Xifeng and Duanjiapo sections that it was relatively cold and dry in loess areas then, and the climate might became colder and dryer from southeast to northwest along the Loess Plateau. A more obvious paleo-humidity variation might exist from S5-1 formation to L5 accumulation in Xifeng.