摘要
利用细颗粒(4—11μm)热释光技术对陕西渭南介子村(34°20’N,109°34’E)剖面晚更新世和全新世黄土、古土壤的11个样品作了年龄测定。通过光晒退实验确定各个样品的残留热释光强度,并用再生热释光方法测定古剂量值。除S_1埋藏古土中部粘化层及下伏红亚粘土层的两个样品的年龄测定值偏小外,其余9个样品的年龄测定值可视为样品所在层位的沉积年龄。它们与相应层位的有机碳^(14)C测年结果相吻合,也与深海沉积物氧同位素阶5以上各阶段的年龄可对比。
Eleven samples oi loess and paleosol collected from the late Quaternary strata of the Jiezhichun section (34°20′N, 109°34′E), Weinan, Shaanxi Province, have been dated using the fine-grain (4-11μm) TL technique. By comparing the data of the bleaching experiment with the TL measurements of the surface Samples, the residual TL level of the samples was tested. Paleodose values were determined by the regeneration method. The TL ages of these samples, with exception of samples ZH-04 and ZH-03 taken from the middle and lower parts of the paleosol S_1, might be considered as the age estimates for the horizons from which the samples were collected, and are coincident with the ^(14)C dates of organic matter of the paleosols. It may be suggested that the S_0, L_(1-1), L_(1-8), L_(1-1) and S_1 of the loess-paleosol sequence in the Loess Plateau cau be correlated with δ^(18)O stages 1, 2, 3, 4 and 5 of the deep-sea sediments respectively, on the basis of the dates and climatic records.
出处
《地质论评》
CAS
CSCD
北大核心
1991年第4期356-362,共7页
Geological Review
基金
中国科学院西安黄土与第四纪地质开放实验室基金资助课题8820的一部分
