滇东地区是我国最重要的磷矿资源基地。长期以来,对本区磷矿成因曾有多种观点,但由于未发现大量藻类和微古植物化石,因而有关生物成磷作用问题,一直没有深入探讨。近年来,笔者在滇东一些主要磷块岩矿区发现大量藻类、微古植物化石和微植 East Yunnan is China’s most important phosphate rock resources base. For a long time, there have been many opinions on the genesis of phosphate rock in this area. However, no large amount of algae and micro-fossil plants fossils have been found. Therefore, the problem of biological phosphorus formation has not been discussed in depth. In recent years, I found a large number of algae, micro-fossil plants and micro-plant in some of the major phosphate rock blocks in eastern Yunnan