Diatomes and Diatomites Study in Azarbayjan Region (Tabriz,Maragheh and Mameghan)

Diatomites of Azarbayjan region are siliceous sediment formed by depositeion of diatom frustules.In this research we focused on systematics of diatomes and uesd polarizing and scanning electron microscope (SEM) to study the samples.Finally 17 genus and 33 species of diatoms were recognized and systematic determination of them presented.We found that the population of Centrales was less than that of Pennales and the age of the deposites determined as Late Pliocene to Pleiostocene. Study of nannofacies of diatomites made it clear that the samples of Mameghan region have better quality and samples of Maragheh need more processing. Systematic study of diatomes morphology by ultramicroscope, internal strucure, size and percentage abundance helped us to determine nannoporosity and the degree of Purity to use for multiple purposes such as filteration, medical, health, chemistry industries and etc…