CRETACEOUS MAGNETOSTRATIGRAPHY IN THE SONGLIAO BASIN, CHINA

This paper is the result of research on the Cretaceous magnetostratigraphy in the Songliao Basin. The palaeomagnetic experiment on 2235 specimens from 24 drills and an outcrop profile in Quantou shows that most specimens have stable remanent magnetization.The features of polarities associated with all the rock formations of the Cretaceous in the Songliao plain have been summarized. The reversed polarity zones have been found in the Yingcheng, Dcnglouku, Yaojia and Nenjiang Formations. These reserved-polarity zones and their geologic ages have been argued. Accordingly. the polarity columns for different drills and a comprehensive column have been compiled, and the classification and correlation of the Cretaceous stratigraphy in the Songliao Basin have been discussed.     

中国松辽盆地白垩系磁性地层

本文根据对松辽盆地白垩系24个钻井岩芯和泉头剖面,共2235块古地磁标本及样品测试结果,总结了松辽平原白垩系各岩组的极性特点,发现了存在于营城组、登娄库组、姚家组、嫩江组的反极性带,论证了这些反极性带的存在及其时代归属,编制了各钻井及白垩系综合极性柱,讨论了松辽盆地白垩系的划分与对比。