塬堡黄土剖面15万年以来磁化率气候记录及黄土磁化率时空特征  

Temporal and Spatial Characteristics of Loess Magnetic Susceptibility in the Yuanbao Loess Section and the Climatic Change over the Past 150000 Years

作　　者：曹继秀[1] 张宇田[1] 王建民 陈发虎[1] 

机构地区：[1]兰州大学地理科学系

出　　处：《兰州大学学报（自然科学版）》1997年第1期124-132,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金

摘　　要：将塬堡剖面１５万年以来的黄土磁化率气候记录与其它气候记录信息如孢粉、有机质含量、粒度、ＣａＣＯ３含量进行了对比，其结果十分吻合．文章还运用吕厚远的黄土磁化率关于降水、温度的回归方程，推算塬堡地区的古温度、古降水，其结果也较为理想．但是，黄土磁化率随地区而异，还随埋藏深度发生变化。The magnetic susceptibility(MS) record of Yuanbao loess since 150 ka B.P. has been demonstrated to have good correlations with records of pollen spores, organic carbon content, grain size, and CaCO 3 content. The paleo precipitation and paleo temperature are calculated on the basis of Lu Houyuan regressive equation of MS in relation to rainfall and temperature. Nevertheless, MS values of loess vary from site to site, and at different depths as well. Further research is necessary for the reconstruction of the palaeo environment by means of MS.

关 键 词：黄土 磁化率气候记录 磁化率时空特征 古气候 

分 类 号：P532[天文地球—古生物学与地层学]