基于磁化率建立黄土时间标尺的探索  

Establishment of the time scale for loess based on magnetic susceptibility

作　　者：曹新光[1] 甘婷[1] 

机构地区：[1]黄冈师范学院旅游文化与地理科学学院,湖北黄州438000

出　　处：《黄冈师范学院学报》2013年第6期77-80,89,共5页Journal of Huanggang Normal University

摘　　要：古地磁或稳定同位素方法为提高沉积物定年精度提供了可能,但若将两种方法在很多地点大范围应用是不可能的。本文采用了来自黄河中游河流阶地的黄土磁化率数据,建立一种与海洋氧同位素记录相互关联的年代-深度关系,并且为黄土堆积物提供了一种较高精度相对定年方法。Even though paleomagnetism method and isotopic tecchnology can provide us with the possibility of the accura- cy of the geologic age for loess, it is impossible to apply the methods mentioned in a wide range of areas with a large num- ber of survey points. Data of magnetie susceptibility were adopted from the terrace loess in the mid-reach of the yellow River, and a time-depth relationship that is correlated to the marine oxygen isotopic record was established. Therefore, a new geological dating method with high accuracy for loess formation was introduced in this paper.

关 键 词：张家湾 磁化率 深海氧同位素 

分 类 号：P532[天文地球—古生物学与地层学] P951[天文地球—地质学]