The Iraqi phosphorites distributed in western desert belong to Tethys phosphorites. They are found in Al-Rutba-H3, Al-Ga'ara, Akashat, and Al-Ethna and in the western wadi Aakash areas. The statistical factor analysis shows that the main five factors playing great roles in phosphate formation in the congenital shelf are the more active factors that control the mineralogical and geochemical distributions in phosphorites; they are (1) Phosphorus enrichment factor, which led to apatite (francolite) formation. (2)