Magnetostratigraphy of ODP Leg 138 sites@en

The aims of this study are twofold. First, the study tries to provide the most reliable chronology possible for two critical sections by correlating the magnetic polarity stratigraphy measured in these sediments with a newly revised geomagnetic polarity time scale. Second, this study attempts to examine in detail the nature of seven short events not included in the shipboard standard time scale, but for which abundant magnetostratigraphic evidence was obtained during the Leg. […]本研究旨在达成双重目标。其一，本研究通过将在上述沉积物中测得的磁极性地层学（magnetic polarity stratigraphy）与最新修订的地磁极性年表（geomagnetic polarity time scale）开展对比关联，力求为两个关键剖面构建尽可能可靠的年代序列。其二，本研究尝试详细考察7个未被纳入船上标准年表的短期事件的本质；上述事件在航次Leg期间已获取了丰富的磁地层学证据。[…]