阿拉伯国有矿产公司日前宣布 ,沙特北部发了一个地下储量约 4亿ｔ、地表面积为 18ｋｍ2 居世界首位的优质磷酸盐矿床。该公司负责人说 ,矿区地层结构易于开采 ,而且储量丰富 ,预计可建年产 45 0万ｔ的磷矿 ;这个数字占目前沙特年产 112 0万ｔ磷酸盐总量的 32 .5 %。照这个产量 A state-owned mineral company in the Arab States announced recently that it has issued a world-class high-quality phosphate deposit with an underground reserve of about 400 million tons and a surface area of ​​18 km2 in the northern part of the country. The company official said that the strata structure in the mining area is easy to mine and abundant in reserves. It is estimated that an annual 4.5 million tons of phosphate rock can be built; this figure accounts for 32.5% of the current total annual output of 11,200,000 tons of phosphate in Saudi Arabia. According to this production