Kisecik (Hatay) Hydrothermal Gold Veins

Yıl 1991, Cilt: 112 Sayı: 112, 17 - 38, 01.05.1991

Ahmet Çağatay İ.sönmez Sayılı Yavuz Ulutürk M.ziya Ateş

Öz

Solutions, forming Kisecik gold veins, were derived by amphibole bearing quartz-diorite which intruded into the metadiabascs. The solutions, placed along the various fractures with different strikes and dips developed in metadiabase due to the intrusion of quartz diorite brought about the formation of vein type mineralization. Besides the vein type of mineralization, contact metamorphism and hydrothermal alteration decreasing downward in intensity developed along the contact of metadiabase with amphibole-bearing quartz-diorite. Veins forming Kisecik gold deposits are seperated into two different groups; as "Kızıltepe and similar veins" and "Deliklikaya Tepe and similar veins". The former is rich in gold content with greater variety of ore minerals. The main ore minerals of this vein are arsenopyrite, pyritc, chalcopyrite, sphalerite, marcasite, loellingite, pyrotite, valleriite, cubanite, native gold, tcllurobismuthite, tellurobismuthite + hessite solid solution mineral, galenite, cinnabar, neodigenite, hematite, magnetite, rutile, anatase, sphene, chromite, ilmenite, tenorite, chalcocite, covellite, limonite, malachite, azurite, siderite, ankerite, scorodite and copper vitriol. Gangue minerals are quartz, chlorite, calcite, dolomite, clay minerals, muscovite and sericite. The ore minerals of Deliklikaya Tepe and similar veins are arsenopyrite, pyrite, sphalerite, marcasite, valleriite, pyrotite, galenite, hematite, rutile, anatase, chromite, sphene, tenorite, chalcocite, covellite, malachite, azurite, limonite, scorodite and copper vitriol. Gangue minerals of these veins are similar to those of Kızıltepe and similar veins, only with a higher amount. Chalcopyrite of Kisecik mineralization bear exsolution starlets of sphalerite and show oleander leaf-like twinnings. Such kind of structures indicate relatively high temperature of ore formations. The presence of cubanile and valleriite as geologic thermometers among the ore minerals points out that mineralization occurred at temperatures between 250° and 350° C. Moreover, occurrence of mushketovite in the mineralizations also indicates part of mineralization is a contact type. According to the field observations and laboratory investigations, Kızıltepe and similar veins of Kisecik gold deposits can be considered as an occurrence or a small deposit from the point of reserves and grades. On the other hand, Deliklikaya Tepe and similar veins contain poor gold mineralizations with non-economic amounts.

Anahtar Kelimeler

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Kaynakça

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