摘要
通过固城湖沉积物中高分辨率的岩石磁学取样及其实验研究，取得了环境磁学参数及各种磁参数的比值随深度的变化曲线，结合其他气候指标和同位素年龄结果，表明湖泊沉积中磁参数及其比值的变化能与末次晚冰期以来的古气候变化很好地相对应，尤其是在４．００ｍ和１２．０３ｍ的气候转折点上，沉积物中环境磁参数及其比值同样出现明显的变化，有力地说明沉积物中磁参数及其比值能很好地记录湖泊沉积物沉积时的古气候变化，并且可用来认识古环境突变的界线．
Based on the experimental study of high resolution environmental magnetism and radio-Carbon dating from Gucheng lake sediments, we tested that the downcore variations in various magnetic parameters exhibit coherent fluctuation with palaeoclimatic changes recorded by other palaeoclimatic information since the last lateglacial, in addition, the magnetic parameters also exhibit a definite response at the boundary (about 4.00m and 12.03m) of palaeoclimatic abrupt changes, these results suggest that rock-magnetic method can be used to detect and characterize the palaeoclimatic changes in the sediments.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期178-187,共10页
Chinese Journal of Geophysics
关键词
湖泊
沉积物
磁性矿物
环境意义
Environmental--magnetism, Lake sediments, Magnetic parameters,Palaeoclim ate.
