Limnische Huntit-Hydromagnesit-Magnesit-Lagerstätten in Mazedonien/Nordgriechenland |
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| Authors: | W Wetzenstein |
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| Institution: | 1. Stuttgart, Bundesrepublik Deutschland
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| Abstract: | Lacustrine sediments of Plio-Pleistocene age in the intramontanous Servia basin /Northern Greece contain so-called microcrystalline magnesite in different areas of the basin. Dressing extremely finely “magnesites” from Aiani/Servia is very difficult. Looking for suitable methods of dispersion and using X-ray analysis, it appeared, that magnesite in the area of the Servia basin forms only a small amount of the total magnesium-carbonatic mineralization, and that huntite and hydromagnesite are predominant. Following analysis preliminary calculation of reserves of seamlike deposits in the area of Servia and Aiani have been made. Both deposits will at least amount to 50 mill. tons in an area of 15 km2. The amount of reserves of the total basin should reach several 100 mill. tons. — The following types of ore could be distinguished: 1. Clayey-silty huntite magnesite ores (most common type). 2. Hydromagnesite-huntite ores (50% of hydromagnesite are normally of gravel size). 3. Huntite ores (nodules in clayey matrix, mainly illites and saponite group minerals). 4. Magnesite ores (nodules with obvious shinkage cracks; relatively rare; can be mined selectively). — The Servia-Aiani Type of deposit is of limnic-sedimentary, Plio-Pleistocenic genesis, which received its Mg- and Ca- content through fluviatile transport from the ultramafic and serpentinized Vourios Mountains. Almost certainly the Servia-Aiani type of deposit has been overlooked because of its insignificant silty-clayey exterior, but it is by no means unique. |
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