Abstarct: Majerad Iron ore deposit is a part of the Majerad Late Neoproterozoic (Ediacaran) –Early Cambrian baxsement complex which associated with mextacarbonate and mextabasites. In addition to the mentioned rock groups, this complex includes mextapelites, mextapsammites and mextarhyolites. In fact, the protolith of the Majerad complex has been a volcanosedimentary sequence which mextamorphosed during a Barrovian type regional mextamorphism event up to amphibolite facies (form P-T condition point of view). Really, Majerad Iron ore deposit is a mextamorphosed ore deposit. Ore forming minerals of this deposit are mainly hematite and goethite. Three XRD analyses confirm this subject and also refer to small amounts of calcite, gypsum or anhydrite, quartz and sericite (or barium bearing muscovite). Also, in situ analyses by using FESEM in more than 150 points confirmed the above mentioned and manifested very beautiful microstructures of the studied iron ore deposit, such as concentric, banded, laminated, spherical, botryoidally, frxamework and massive. These analyses also implicate on formation of manganese-bearing ore minerals (3-6.5% MnO), and rare case of Mn-rich minerals (pyrolusite or pesylumelane by up to 40% MnO), and meanwhile confirm the present small amounts of gunge minerals such as calcite, gypsum or anhydrite, Quartz and sericite (or barium bearing muscovite. Whole rock chemical analyses of six samples of ore bodies indicate that the concentrations of the FeO and Fe2O3 vary from 40 to 55% and 15 to 25%, in respectively. The other elements such as Co, V and Ti have low concentrations. Mn has valuable concentration and show positive correlation with Fe2O3. Small amounts of Al, Ba and S have been found in Majerad Iron ore deposit. In general, can be notice that Majerad deposit has mainly haematitic composition and high quality. The amounts of the other oxide elements such as BaO, SiO2, Al2O3 and CaO rarely exceed than five percent. With respect to Majerad ore deposit outcrop, and easy available to them and their easily for extraction in the form of open pit, this deposit has a good economic value. Primarily estimation refer to present at least 50000 tones Fe-ore minerals in this deposit. The preliminary ore minerals have been generated in relation to submarine volcanic activities and they resulted in the deposition or crystallization of rich in Fe or Mn fluids in aqueous media or environment. Gol Gohar iron ore deposit is one of the index case which has high similarities with Majerad Iron ore deposit. Mineralization of Fe and Mn in relation to Late Neoproterozoic (Ediacaran)–Early Cambrian baxsement complexes has been reported from south and southeast Shahrood from north of Par-O-Ball and Sorkh Tool sheepcotes (south of Do Chah), east and southeast of Abolhay sheepcote, and Halalan in west-northwest of Moalleman. Finally, we can consider that Majerad Iron ore deposit is an ore mineral formation in relation to submarine far from origin volcanic activities.