The calcite and quartz veins crosscut the NaCa altered rocks. The NaCa altered rocks and calcite veins Î´18O values (relative to SMOW) vary between to 12 â ° and between to â ° respectively, while their Î´13C values (relative to PDB) vary from to â ° and to â ° correspondingly.
nbsp;The Almoughlagh Batholith, consisting chiefly of quartzsyenite and syenogranite rocks, belong to the magnetite series granitoids, are mostly of... Mineral chemistry of index minerals and their implications in the genesis of the Baba Ali magnetite skarn deposit, western Iran
Banded iron formation. A sedimentary rock that was commonly deposited during the Precambrian. It was probably laid down as a colloidal ironrich chemical precipitate, but in its present compacted form it consists typically of equal proportions of iron oxides (hematite or magnetite) and silica in the finely crystalline form of quartz known as chert.