江苏船山石灰石矿床沉积环境

根据每组石灰石中都含有大量的海洋沉积窄盐度生物及藻类化石,推断船山矿床为浅海碳酸盐沉积;从每组石灰石的粒度、颜色、结构构造,推断出该矿床在形成过程中有两次大规模海侵,两次沉积中断.沉积环境的变化决定了石灰石的质量,氧化环境罩形成的石灰石颜色较浅较纯可作为熔剂,还原环境里形成的石厌石颜色较深,有机质含龄高只能作为水泥原料.

Depositional environment of limestone deposit in Chuanshan of Jiangsu

The different beds of limestone in Chuanshan ore district were of varied sedimentary characters. The authors deduced Chuanshan limestone deposit was shallow sea carbonate deposition based on narrow salinity life-forms and algae fossils of marine deposition existed in each set of limestone; deduced there happened twice large-scale marine ingression and twice depositional intermit in lights of the particle, color, texture and structure. The variation of depositional environment determined the quality of limestone. The limestone formed in oxidized environment showed a shallow color and better purity and could be served as flux, the limestone formed in deoxidized environment showed a dark color and a high content of organic matter and only be served as cement raw material.