现在世界上有三十多个国家在浅海勘探和开采海滨砂矿。每年从海洋中取出的砂矿产值占海底矿产总产值的第三位,仅次于石油和煤。我国自五十年代以来,也已在海滨开采锆石等砂矿,但在研究和勘探海滨砂矿的工作方面,还不能适应当前国民经济的需要。我国有漫长的海岸线。对海滨砂矿最有利的砂砾质海岸范围辽阔:在北方主要是辽东半岛和山东半岛沿岸;在南方则是长江口以南的闽、浙(包括台湾省)沿岸。南方各 Now more than thirty countries in the world are exploring and mining seaside sand mines in shallow seas. The annual output of sand from the ocean accounts for the third largest total seabed mineral output, second only to oil and coal. Since the 1950s, China has also exploited zircons and other placer deposits at the seashore. However, it still can not meet the needs of the current national economy in terms of researching and exploring the work of seashore planing. My country has a long coastline. The most favorable gravel coasts for beach sands are vast: the Liaodong Peninsula and Shandong Peninsula coasts in the north, and the coasts of Fujian and Zhejiang (including Taiwan Provinces) south of the Changjiang Estuary in the south. South each