本省沿海地区砂质海岸发育,蕴藏丰富的滨海砂矿.有工业价值的砂矿床10处,矿点20余个.根据矿床形成的地理位置和矿床类型可划分为3个成矿区.这些矿床均形成全新世中、晚期的沿岸沙堤、海滩、水下沙坝中,个别砂矿床赋存于中更新世北海组冲积层中. There are 10 sand deposits with industrial value and more than 20 ore deposits, which can be divided into 3 metallogenic areas according to the geographical location and deposit type of the deposit. During the middle and late Holocene sand banks, beaches and submarine sand bars, individual sand deposits occur in the alluvial layer of the Middle Pleistocene Beihai Formation.