calcareous sandstone造句

• In lithology , the calcareous sandstone is of coarse grain and fairly well sorted
  岩性主要为粒度相对较粗、分选较好的碎屑岩。
• According to the analysis on the lithogeochemical features and the carbon and oxygen isotopes of calcareous sandstones , it is realized that there some genetic relation between the formation of calcareous sandstone and uranium mineralization in the oxidation - deoxidation transitional belt , that is the precipitation and enrichment of uranium is accompanied by the deposition of carbonate and formation of calcareous sandstone
  根据钙质砂岩的岩石地球化学特征，结合碳、氧同位素分析认为，氧化还原过渡带中钙质砂岩的发育与铀矿化的形成具有一定的成因联系，即在铀沉淀富集成矿的同时，伴随着碳酸盐的析出作用，形成钙质砂岩。
• Based on the observation and statistics on the calcareous sandstone in the ore host layer in shihongtan uranium deposit , this paper finds that the calcareous sandstone occurs on and off near the top or wash surface of the sandbody as beads - strings lens along the layer and concentres in the area where the orebodies are rich
  摘要通过对十红滩铀矿床容矿层钙质砂岩的观察和统计，发现钙质砂岩呈顺层、断续的串珠状透镜体分布，产出空间位置为砂体的顶底部或冲刷面，而且较集中的分布在矿体发育区。