根据硅岩的岩石学及地球化学特征，对其成因进行了系统研究。
The origins of the siliceous rocks have been researched systematically based on their lithological and geochemical characteristics.
该剖面岩以石灰岩为主，含少量的硅岩、泥岩、页岩和白云岩。
The rock types of this section include limestone, silicalites, mudstone, shale, dolomite.
某地区志留系中的铀矿床，主要受硅灰岩和硅岩含矿层形态变异部位和断裂构造控制。
The uranium deposit of Silurian age in a certain area is controlled mainly by fracture and morphologically changing parts of uranium bearing siliceous limestone and chert beds.
应用推荐