河砂（建筑用砂）

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主要分布于大汶河沿岸，河砂资源丰富，砂的来源主要是泰山群古老变质花岗岩类，经长期风化破碎后，再由流水搬运沉积而成。区内沉积的河砂分选性好，砂质硅含量高，硬度大，颗粒均匀，表面洁净，属优质建筑用砂。