BiCoNi formation

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The BiCoNi formation is a hydrothermal vein formation in which bismuth , cobalt , nickel and uranium ores have grown together. It occurs mainly in the Ore Mountains and is the youngest formation in the hydrothermal sequence (kb formation, eba formation, eb formation, fba formation, BiCoNi formation). Because of its association with uranium, it is sometimes referred to as the bismuth-cobalt-nickel-uranium formation.

genesis

The BiCoNi formation was formed during the contact metamorphic remodeling of the sedimentary schist as a result of varistic granite intrusions during the subhercyan-Australian cycle about 100–80 million years ago. It is the product of intracrustal, epithermal paragenesis . It has a quartz gangue as the main ores cobalt and nickel, which usually occur in connection with arsenides , as well as solid bismuth and pitchblende .

use

The BiCoNi formation had been the target of intensive mining since the late Middle Ages, initially for bismuth, later cobalt and nickel and, since the end of the 19th century, also for uranium, which became the subject of intensive mining by SDAG Wismut in the second half of the 20th century .

literature

  • Oscar Walter Oelsner : The Erzgebirge granites, their mineralization and the position of the BiCoNi formation within this mineralization (=  Geology . Vol. 7, No. 3-6 ). Berlin 1958, p. 682-701 .
  • G. Leithold et al .: Taschenbuch Bergbau . Civil engineering. Ed .: Chamber of Technology, Association of Mining. tape III . German publishing house for basic industry, Leipzig 1962, p. 30-35 .
  • U. Lipp, S. Flach: Bismuth, cobalt, nickel and silver ores in the northern part of the Schneeberg deposit district . Ed .: State Office for Environment, Agriculture and Geology (=  Mining in Saxony . Volume 10 ). ( publications.sachsen.de [accessed on February 26, 2014] several parts, linked).
  • Axel Hiller, Werner Schuppan: Geology and uranium mining in the Schlema-Alberoda district . Ed .: State Office for Environment, Agriculture and Geology (=  Mining in Saxony . Volume 14 ). 1st edition. December 31, 2007 ( publications.sachsen.de [PDF; 6.3 MB ; accessed on February 26, 2014]).

Web links

Individual evidence

  1. ↑ U. Lipp, S. Flach: Overview of the chronological sequence of mineral deposits and the formation of paragenesis . In: State Office for Environment, Agriculture and Geology (ed.): Bismuth, cobalt, nickel and silver ores in the northern part of the Schneeberg deposit district (=  mining in Saxony ). tape 10 , Appendix 1, Figure 90, p. 1 ( publications.sachsen.de [PDF; 7.0 MB ; accessed on February 26, 2014]).