【摘要】 利用细颗粒热释光技术对渭南剖面重要地层界线处的 7个样品进行了年龄测定 ,并在此基础上 ,结合已发表数据利用多项式回归方法建立了渭南剖面高分辨率的古气候时间标尺 ,其中S0 /L1- 1,L1- 1/L1- 2 ,L1- 4/L1- 5 ,L1- 5 /S1,S1/L2的界线年龄分别为 1.1,2 .5 ,5 .1,7.6 ,12 .8ka ,除了L1- 4/L1- 5的界线年龄与氧同位素 3阶段的起始年龄差距较大之外 ,它们与SPECMAP深海氧同位素 5以上各阶段的界线年龄可进行较好的对比 ,而L1- 4/L1- 5的界线年龄与北太平洋风尘记录的氧同位素年龄却有很好的一致性 .更多还原

【Abstract】 Seven samples of loess and paleosol collected from the major stratigraphic boundaries of the Weinan section, Shaanxi Province, have been dated using the fine_grain TL technique. Based on the TL results and previously ages_published from this section, the polynomial regression methods are applied to developing the high resolution timescale for the Weinan loess section in the Late Quaternary. According to this timescale, the ages of S0/L1-1, L1₁/L1₂, L1₄/L1₅, L1-5/S1 and S1/L2 stratigraphic boundary of Weinan section are 1.1, 2.5, 5.1,7.6 and 12.8?ka. With exception of the maximum difference between the ages of L1₄/ L1₅ and the ages of 3/4 stage boundary of the deep_sea oxygen isotopes, they are generally consistent with the ages of 1/2, 2/3, 4/5 and 5/6 stage boundary of the deep_sea oxygen isotopes in the SPECMAP curve.更多还原