Ore mineralogy of the iron mineralizations in the contacts between Elaziğ magmatites and Keban metamorphic rocks

Granitic and dioritic rocks (diorite, quartz diorite, ± gabbro) of Elazig Magmatics (Upper Cretaceous), marbles belonging to Keban Metamorphics (Permo-Trias) (calcitic and dolomitic marbles) are southeast of the villages of Aşvan, Birvan, Meşeli and Tatlıpayam cuts intrusively. It is accompanied by significant iron mineralizations (magnetite, ilmenite and hematite) and generally intense scarning along the contacts. This shows that the solutions that make up the scarning and mineralization belong to a single function. Iron mineralizations are operated Three Trees, Aşvan, Dallıca, Fatmalı, Meşeli and in the south of Pertek. İn Demürek (Pertek-Tunceli) and in the Tuzbaşı-Kanatburun-Ayazpınar (Pertek-Tunceli) regions, magnetite and ilmenite mineralizations are generally accompanied by scarn rocks. Intrusive masses cause metasomatic events by reacting along their contacts with rocks in which they are inserted at deep and medium depths. With the effect of this intrusion, while exoscarns are formed in the side rock, endoscarns are formed in the intrusive mass and along the contact. During this contact, scarn minerals developed due to metasomatism. The main minerals are observed along the contact zone: Garnet, pyroxene, quartz, calcite, plagioclase, tremolite / actinolite, epidote, chlorite, spinel, apatite, sphene and also less olivines. In addition, magnetite, hematite, specularite, limonite are among the components with FeO, and in less proportions from the components with sulfur; pyrite, chalcopyrite, pyrrhotite, covelline, chalcosine. Magnetite mineralizations developed in contact zones of diorite and quartz diorite intrusions, and ilmenite mineralizations developed in contact zones of gabbro intrusions, and trace element contents are typical trace elements of the basic magmatism phase such as Ni, Co, Cr and Ti. Magnetite mineralization is the most common mineralization in the field. It is observed especially in dolomitic and calcitic marbles in intrusive contacts. It offers massive and scattered ore types. The main ore mineral of magnetite mineralization is self-shaped and zoned magnetite. Also, a small amount of hematite, limonite, specularite, pyrite and chalcopyrite are encountered. Ilmenite mineralizations are best observed in the northeast of Tuzbaşı Hill, very little in the southwest of Tuzbaşı Hill. It consists from ilmenite mostly and hematite, limonite, pyrite and chalcopyrite in less proportions than ilmenite. Specularite mineralizations are iron mineralizations in the north and northwest of the Baranlar Plant (Meşeli Village). The main ore mineral of hematite mineralizations is specular hematite, and these mineralizations developed along the granitic rock contacts. Very little and fine grained (10-20 microns) pyrite and chalcopyrite minerals are also observed in the mineralizations. The geochemical studies conducted on samples compiled from iron mineralizations, scarn zones and plutonic rocks show that these three formations have similar geochemical properties and are closely related.