GEOLOGY, MINERALOGY AND GEOCHEMISTRY OF SULPHITE MINERALIZATION IN THE ISPENDERE REGION (MALATYA)

Year 1999, Volume: 121 Issue: 121, 57 - 82, 01.02.1999

Halide Dumanlılar Doğan Aydal Özcan Dumanlılar

Abstract

- In this study, the geology,
mineralogy, petrography, geochemistry, wallrock alteration, ore-wallrock
relations, micro structural and textural relations in the copper-pyrite
mineralization in Kızmehmet site (Ispendere-Malatya) and its vicinity were investigated.
Ispendere Ophiolite (Jurassic-Lower Cretaceous), Yüksekova complex (Upper
Cretaceous) and Kırkgeçit formation (Middle Eocene) crop out in the study area,
which is located in Malatya-Elazığ region of the Eastern Taurus orogenic belt.
Yüksekova complex is formed by Kuluşağı magmatites, Kapıkaya volcanics, Şişman
magmatites and Harabe hill magmatites. Harabe hill magmatites cut all of the
mentioned rocks in the complex and caused to form all of alteration types and
different mineralizations in the study area. When the mineralogical,
petrological and geochemical data are taken into consideration, the ore
minerals bearing Harabe hill magmatites and the other type magmatites in
Yüksekova complex were determined as product of I-type calcalcaline magmatism.The
copper-pyrite mineralization is generally located in the Harabe hill magmatites
and its contacts with the surrounding rocks. Four types of alterations related
with the mineralization processes were determined in the study area, namely;
weak potassic, phyllic, argillic and prophylitic. The ore mineralization is
generally surrounded by phyliic-prophylitic alteration and/or phyllic
alteration halous. The ore minerals are found within quartz-carbonate veins, as
coatings in joints and faults and as well as disseminated ore minerals in the
host rock. The main ore minerals are pyrite, chalcopyrite and magnetite, while
sphalerite, galenite, pyrotite. bornite. rutile-anatase and ilmenite is less
amount. Limonite, hematite, marcasite. chalcocite and covellite are found as
secondary ore minerals. Prophyry copper-pyrite and/or stokwork type
mineralization were detected in the study area according to the studies based
on geotectonic environment, ore mineralogy, ore type host rock-ore relation and
host rock alteration.

Keywords

Granitoid, porphyry, alteration, dacite, Kızmehmet Site (Malatya)

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