Beneath the relic sand of the outer shelf there is high grade of valuable heavy mineral sand ( for example ilmenite ) reaching the ii anomaly order of marine placers and it is of potential resource prospects 通过碎屑矿物判断，原岩应是中酸性岩浆岩和浅变质岩类。钛铁矿等有用矿物在细砂层位中出现较厚的砂矿异常，显示一定的浅海砂矿资源潜力。
