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Publication Detail
Diagenetic Transformation of Sapropel from Lake Dukhovoe (East Baikal Region, Russia)
  • Publication Type:
    Conference
  • Authors:
    Bogush A, Leonova GA, Krivonogov SK, Bobrov VA, Tikhova VD, Kondratyeva LM, Kuzmina AE, Maltzev AE
  • Publisher:
    Elsevier
  • Publication date:
    06/2013
  • Pagination:
    81, 84
  • Published proceedings:
    Procedia Earth and Planetary Science
  • Volume:
    7
  • Name of conference:
    Water Rock Interaction [WRI 14]
  • Conference place:
    France
  • Conference start date:
    09/06/2013
  • Conference finish date:
    14/06/2013
  • Number of volumes:
    7
  • Keywords:
    geochemistry, biogeochemistry diagenesis, sapropel, element migration and accumulation
Abstract
The chemical and microbiological composition of sapropel was investigated in the 7 m Holocene sediment core of Lake Dukhovoe. Sapropel is mainly formed from phytoplankton. Heterotrophic bacteria play the main role in the decomposition of organic matter in this sapropel, with the formation of organic-mineral complexes. A reducing type of diagenesis was established in the sapropel. Processes of sapropel transformation under the influence of mechanical, biochemical, microbiological, and physicochemical processes l ead to the formation of geochemical barriers and new phases (organic-mineral complexes, diatomite, pyrite inside the cyst of ะก hrysophyceae, framboidal pyrite, vivianite, carbonates, etc.), as well as the accumulation and leaching of elements.
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