Topography and reconstruction of historical mines of the Kagarlinsk mining-metallurgical center (Bronze Age)

Abstract

Kagarlinsk copper deposits have been worked out since IV millennium BC and till the end of II millennium BC in the steppes of the South Urals and a huge amount of copper have been recovered from their ores in the Bronze Age. Geophysical studies have been conducted in the south periphery of the Kagarlinsk ore field not far from Belousovka village at the mining-processing complex with the length of 900—1000 m and 30—70 m size across. Something like a hundred of small open-cut mines from 3 to 12 m in diameter are fixed in this area with near side mine dumps, sites for assortment of extracted ore adjoined at stove pits 3—5 m in diameter for burning up lump ores. Thorough topographic, gradient magnetic and geo-radar surveys have been fulfilled in areas where typical objects: open-cut mine, a pit for pilot burning up ores, slime sites and ore store are situated. As a result new data have been obtained on the structure of ancient outputs and associated technological facilities. Numerous magnetic anomalies revealed near the open-cut mine and a pit testify that copper ore encloses sufficient amount of iron and pilot assortment of the burned up ore took place near the pits. According to the results of geo-radar survey special features of pit-stove have been reconstructed and 3D model of the ancient open-cut mine built. A pit for burning up ore was cone-shaped with steps for comfort of loading and unloading ore. Its bottom diameter was 5m, the principal mine was 1—1.5 m in diameter and depth rough 3 m, the volume of the pit did not exceed 13—15 m3. Transversal size of a mine was 7—9 m and the depth was up to 4 m. The open-cut mine had steep sides from the north, east and south and in the west the relief was mildly sloping. The entrance to the open-cut mine was from the west. Initial depth of the open-cut mine differed from the present day surface by 2—3 m. According to our appraisal the amount of extracted ore in this mine was 25—30 tons. Taking into account the overall number of mines some 2—2.5 thousand tons of bulk ore were extracted during operation of Belousovka mining-metallurgical complex.