一、引言 大洋沉积岩芯的古地磁学研究工作,虽然从1938年就开始了,然而直到1964年由C.A.G.哈里森和B.M.芬内尔对太平洋一沉积岩芯进行古地磁测量时,才发现深海沉积岩芯能提供比火山岩更为完整的反映地球磁场极性变化的连续记录。 1966年拉蒙特地质研究所对南极洲周围海域的沉积岩芯进行古地磁学研究时,发现高纬 I. INTRODUCTION Although the paleomagnetic study of oceanic sedimentary cores started in 1938, it was not until 1964 when paleomagnetic measurements of the Pacific-Sediment core were made by CAG Harrison and BM Fenner that deep-sea sedimentary cores Can provide a more complete record of volcanic rocks that reflects changes in the polarity of the Earth’s magnetic field. In 1966, the Lamont Institute of Geology conducted an paleomagnetic study of sedimentary cores in the area around Antarctica and found that high latitudes