做为城乡建筑必不可少的砂石材料,在北京平原区有着广泛的分布。如永定河和潮白河冲洪积扇以及河道两侧均有储量较大,质量较高,岩性以中、粗砂夹少量卵石为主的砂石材料。为了进一步开采利用,满足首都建设需要,我们利用1:5万电测 As an indispensable urban and rural construction of gravel materials, in the Beijing Plain has a wide distribution. Such as Yongding and Chaobai alluvial fans and both sides of the river have large reserves, high quality, lithology in the sand, a small amount of gravel sand gravel-based materials. In order to further exploitation, to meet the capital construction needs, we use 1: 50000 electrical measurements