摘要
棋子山运动是一次强烈的地质构造运动。它使老黄土下部及其同期异相的湖积层发生了一系列的构造变动——断层、褶曲(向斜、背斜)等;使我国北方的地貌条件有了很大的改变,许多大的湖泊如泥河湾古湖、三门古湖等都在此时灭亡;桑干河、汾河、渭河、黄河等都在此时形成。棋子山运动发生在老黄土下部堆积之后,老黄土上部堆积之初;在地磁柱上属安比拉亚时,其绝对年龄为距今0.49～0.50Ma。由于棋子山运动的发生,在河谷地带和山前平原生成了非常良好的蓄水构造,成为许多大、中城市的供水水源地和矿产生成地;同时也由于棋子山运动的发生,使断裂的复活、地震的发生、边坡的坍塌,给许多工程带来了不利因素和造成了严重后果。
The Qizishan movement is an intensive geotectonic movement, which lead to a series tectonic alteration of the lower part of the ＂Old Loess＂ and the contemporanous different facies——lacustrine formation, such as fault, fold （syncline and anticline）, etc. ; lead to a clearly change for the North China in ge0morphology, many large lakes, such as the Nihewan plaeolake, the Sanmen paleolake, etc. , disapeared in this times many rivers, such as the Sanggan River, Fenhe River, Weihe River and Yellow River, formed in this time, too. The Qizishan movement happened after sedimentation of the lower part of the ＂Old Loess＂, at the beginning of sedimentation of the upper part of the ＂Old Loess＂ ~ belongs to Emperor substage in geomagnetochronology, about 0. 49 - 0. 50 Ma BP. As results of the Qizishan movement, very good reservoir structure were formed in valleys and piedmont flats, provided water source for many cities; and fault reactive, earthquakes and landslides happened, were harmful to many construction objects.
出处
《地质论评》
CAS
CSCD
北大核心
2008年第3期335-342,共8页
Geological Review
关键词
棋子山运动
老黄土
湖相地层
安比拉事件
蓄水构造
The Qizishan movement
the ＂Old Loess＂
lacustrine formation
Emperor event
reservoir structure
