论文部分内容阅读
古地磁学是一门近年来蓬勃兴起的年轻学科.由于它在地质、地球物理等学科研究中作出卓越的贡献,引起地学界的极大重视,同时也带动了学科本身的迅速发展.磁性地层学是在地层学和年代学的基础上通过研究火山岩和沉积物序列中所记录的地球磁场和岩石单元磁性特征的一系列磁极性变化而逐步建立起来的一种新的地层研究方法.自1969年英国占地磁学家A·考克斯制定的最近450万年以来地磁极性变化的时间表以来,由于K-Ar法年龄测定的精度和古地磁测试技术水平的不断提高,使磁性地层学得到了较大的发展.七十年代初期,我们开始对中国第四纪磁性地层进行研究.通过多年工作,为解决中国第四系的划分和对比;第四纪下限;黄土时代;古人类化石年龄;第四纪冰期和海侵时代等问题,提出了一些新的看法,取得了一些成果.
Paleomagnetism is a young discipline that has been flourishing in recent years. Due to its outstanding contribution to the researches on geology and geophysics, it has aroused great attention of geosciences and also promoted the rapid development of the discipline itself. Learning is a new method of stratigraphic study that is gradually established on the basis of stratigraphy and chronology by studying a series of magnetic polarity changes of the magnetic properties of the earth’s magnetic field and rock units recorded in volcanic rocks and sedimentary sequences.From 1969 Since the British geomagnetic surveyor A Cox developed the most recent 4.5 million years of geomagnetic polarity changes in the timetable, due to K-Ar dating accuracy and paleomagnetic testing technology continues to improve, so that magnetic stratigraphy We have started to study the Quaternary magnetic stratum in China in the early 1970s, and after many years of work, we are trying to solve the problem of the division and contrast of Quaternary in China, the lower limit of the Quaternary, the loess era, the ancient human fossils Age, Quaternary glacial period and transgression era, some new ideas were put forward and some achievements were achieved.