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243:. Losses during calcination range from 12 to 20 percent. Gibbsite-boehmite ores predominate, although diaspore and gibbsite are also encountered. The ores are derived from deposits of the geosynclinal or Mediterranean type. Most scientists regard the bauxites of the Mediterranean province as talus and proluvial deposits having formed from the products of the erosion of the lateritic and subsequently having undergone the process of bauxitization.
211:. The deposits form pockets, lenses, chains of pockets or lenses, and sometimes extended sheets. The bauxite sheets tend to slope, either gently or steeply; only on the Hungarian Massif do the sheets lie almost horizontally. The sheets that are currently being mined range in thickness from 1 m to 8 m.
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The annual output of bauxite in the
Mediterranean province increased from 6 million to 10 million tons a year between 1961 and 1972. The most economically important deposits are in southern France and Yugoslavia.
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The
Mediterranean bauxite region, part of the Alpide geosynclinal belt of bauxite formation, includes geosynclinal depressions and the peripheral parts of platforms and median masses. The bauxites date from the
195:(Brignoles and elsewhere). The first bauxite ore was discovered in 1821 around Les Baux in southern France, from which the ore received its name. The major deposits were found in the 19th century.
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Bauxites of the
Mediterranean province generally overlie the karstic surfaces of
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ores that stretches for 3,000 km along the northern shore of the
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The ores have a chemical composition of 45–55 percent Al
191:(Gánt, Halimba, Iszkaszentgyörgy, Nyirád, Harsan), and
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43:but its sources remain unclear because it lacks
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179:The largest bauxite deposits are located in
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126:is a major region of high-quality
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305:Geology of Bosnia and Herzegovina
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345:Environment of the Mediterranean
275:The Free Dictionary Encyclopedia
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124:Mediterranean Bauxite Province
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290:Geologic formations of Europe
269:The Great Soviet Encyclopedia
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271:, 3rd Edition (1970–1979).
183:(Parnassus-Giona region),
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265:, 2nd ed. Moscow, 1975.
58:more precise citations.
239:, and 2–3 percent TiO
215:Chemical composition
325:Geology of Hungary
310:Geology of Croatia
300:Geologic provinces
263:Geologiia boksitov
261:Bushinskii, G. I.
231:, 15–23 percent Fe
227:, 2–10 percent SiO
31:list of references
335:Geology of Turkey
320:Geology of Greece
315:Geology of France
199:Types of deposits
132:Mediterranean Sea
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56:introducing
284:Categories
256:References
205:limestones
185:Yugoslavia
111:March 2023
209:dolomites
64:July 2011
175:Deposits
189:Hungary
169:Neogene
167:to the
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