秦岭东部发育了一系列记录中、新生代转换时期化石演替历史的山间盆地，清晰地显示出这里保留了白垩纪—古近纪灭绝事件的重大生态环境变化记录。然而，受上述事件影响的恐龙大灭绝和哺乳动物大发展带来的全球环境变化记录存在年代学争论；我国南北区系受K-T灭绝事件的影响区别也未完全得到确认。项目设计在我国的南北缝合带-东秦岭山阳和石门盆地开展全面的磁性地层学和旋回地层学工作。通过对白垩纪—古近纪地层代表性剖面的高分辨率年代测定，辨别多处化石发育时代，建立我国中部地区白垩纪—古近纪陆相标准地层。对磁矿物组合和气候指标进一步的研究也将揭示该地千年到百万年尺度的气候和环境变化及对生物演替的影响，地层环境的变化境况和重大生态时间发生的特征，为K/T界线附近生物及环境演变的全球对比研究提供新依据。还将通过构造古地磁手段的古地理和构造作用过程的恢复，寻找存在于我国南北缝合带构造活动与环境变化和生物巨变之间的纽带。

The Eastern Qinling basin of Shaanxi Province preserves Late Cretaceous to Early Paleogene strata and fossils assignable to the remarkable Cretaceous-Paleocene extinction event and the dramatic Change of faunal succession from “Dinosaur era” to “Age of Mammals” conditions occurred across the Cretaceous-Paleocene boundary ( or K-T boundary, around 65 Ma) . It’s been a debate on the time of lag between the global transitions in between the different terrestrial biotic reorgnization. . We propose to measure the magnetostratigraphic sections and analyzed the cyclostratigraphy of the strata, through high-resolution and high-precision dating in the representative sections calibrating the mammalian fauna sequence within a chronostratigraphic framework, constrain the time of fossil horizons in the basin and established the Cretaceous-Paleocene continental standard stratigraphy in central China. .We are also trying to study the variations in magnetic mineral assemblages and grain size which reflect climatic and environmental changes during deposition in the continental sedimentary realms on a scale of thousands to millions years, revealing formation environment changes the situation and major ecological time feature for the K/T boundary in biological and environmental evolution of the land comparative study provides a new basis. Paleogeographical reconstruction will enable us find the missing link between the tectonic activity, environmental change and biotic reorganization.