Chemico-mineralogical characterization of ancient slags from Rosen Ore Field. Part 2 – Korucheshme and Rosen deposits, metallurgical center „Atiya“

Author: Nikoleta, Published:

chrysocolla_slag

Tzankova, N., D. Stavrakeva, P. Leshtakov, K. Dimitrov. 2016. Chemico-mineralogical characterization of ancient slags from Rosen Ore Field. Part 2 – Korucheshme and Rosen deposits, metallurgical center „Atiya“ – Univ. Min. Geol., 59, 1, Geol., 61-66 (in Bulgarian with English abstract).

 

ABSTRACT. The ancient slags, found in the Rosen ore field were researched. They were collected from the surface of several ancient metal production centers located near the ancient mines in Medni rid. The mining of copper there is referred to the period 6th century B.C. – 4-5th century A.D. The chemical composition of the samples was determined based on data from ICP-OES. The slags have high Fe2O3 and SiO2 content. Their mineral composition was studied with the help of an optical microscope in transmitted and reflected light, with the methods of X-ray powder diffraction аnd with electron probe microanalyses. It was found that the slags consist mainly of iron-containing phases such as fayalite, magnetite, maghemite, wustite, kirschsteinite, the presence of copper drops and copper-sulfide aggregates. The studied materials are defined as by-products, produced from the heat treatment of copper-iron sulfide ore for copper mining in ancient times.

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