应用大地测量资料论证北京平原的现代构造运动和现代应变场

从测量资料的研究得知北京平原地区的现代构造形态与第三纪形成的京西北隆起、北京凹陷、大兴隆起等不相符合。由于出现一个北西向的下降带,使原来“两隆夹一凹”的构造形态可能解体。同时,应变场也起了变化,认为该地区目前处在南东方向的拉伸应力场中

ON THE RECENT TECTONIC MOVEMENT AND STRAIN FIELD IN BEIJING PLAIN AREA BY THE GEODETIC DATA

In Beijing plain area the tectonic settings during the Tertiary period having an upheaval in its northwestern part, a depression in its central part and Dai Xing upheaval suffered remarkable changes in the course of recent tectonic movement. From the repeated levelling data it is suggested that along the NW trending Nankou-Sunhe fault was generated a subsidence zone cutting across the NE trending Tertiary structure and destroying the original tectonic framework.In connection with this the recent