硅藻遗骸的稳定性对硅藻土形成环境的指示

Stability of diatom remains and their implications for forming environment.

硅藻遗骸的稳定性对于理解硅藻土矿的全球分布十分重要 .作者在不同 p H值和温度条件下 ,对硅藻遗骸的稳定性进行了研究 .结果表明 :温度高于 4 0℃或者 p H>12时 ,硅藻遗骸的溶解度成倍地增加 .它指示着硅藻土矿主要分布于中高纬度地区 ,不仅是因为那里的冷水域有丰富的营养盐 ,有利于硅藻的生长繁殖 ,还因为低温有利于硅藻遗骸的保存而不至于被溶解 .

An important goal in better understanding the globe distribution of diatomite is to understand the stability of diatom remains. An experiment of stability of diatom remains was performed. The results show that pH value and temperature dominantly influence the stability. When temperature reaches to 40℃ or pH>12, the solubility of diatom remains multiplies. This may indicate that the distribution of diatomite in cold area of middle to high latitude is not only where are rich in nutrition for diatom to flourish but also that the lower temperature favorites to diatomite's preservation and not being dissolved.