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冀东迁西地区位于河北省北部燕山山脉中段,北京以东200公里处,是我国古老太古界变质岩分布地区之一。为了从古老地层中分筛出燕山运动以来形成的山字型构造成分,从而获得该区构造变迁的总轮廓,早在1964年我们就开始对该区变质岩进行同位素年龄测定。1965年在迁西东荒峪测得变质岩钾-氩年龄值3106百万年,嗣后,又陆续取得10—20多亿年的数据,并测定了该
Jidong Qianxi area is located in the northern part of Hebei Province Yanshan Mountains in the middle, 200 kilometers east of Beijing, China is the ancient Archean metamorphic rock distribution area. In order to screen out the mountain-shaped tectonic components formed since the Yanshan movement from the ancient strata, the total contour of tectonic changes in the area was obtained. As early as 1964, we began to measure the isotopic age of metamorphic rocks in this area. In 1965, the metamorphic rock potassium-argon age value of 3106 million years was measured in the relocation of the Wutong River in the west-east of the country. Subsequently, more than 10-20 billion years of data were successively obtained and measured