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Sedimentation History of Neogene Lacustrine Sediments of Suseocka Bela Stena Based on Geochemical Parameters (Valjevo-Mionica Basin, Serbia)

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2008
Authors
Šajnović, Aleksandra
Simić, Vladimir
Jovančićević, Branimir
Cvetković, Olga
Dimitrijević, Radovan
Grubin, Nenad
Article (Published version)
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Abstract
Sediments of the western part of the Valjevo-Mionica basin (Serbia) were examined both geochemically and mineralogically to explain, on the basis of their sedimentological characteristics, the causes of changes in their qualitative and quantitative composition. A total of 62 samples obtained from the drillhole at depths up to 400 m was investigated. Using correlation of the obtained data, six geochemical zones were defined, two of which being specially distinguished by their mineralogical, geochemical and sedimentological characteristics. The first one, upper zone A, consists of banded marlstones interbedded with clay and oil shales and is characterized by presence of analcite and searlesite. These minerals and very high contents of Na(2)O indicate sedimentation in alkaline conditions with increased salinity in and climate. That provided pronounced water stratification, as well as higher bioproductivity in the basin and sedimentary organic matter preservation. Therefore, the zone A sed...iments are characterized by high organic matter contents of the type which provides good potential for production of liquid hydrocarbons. Another specific zone, zone F, contains sediments with very high MgO, K(2)O and Li concentrations. Their geochemical correlation, as well as almost complete absence of illite in this zone, indicates the presence of interstratified clay mineral type illite-saponite (lithium-bearing Mg-smectite).

Keywords:
lacustrine sediments / geochemistry / searlesite / statistical analysis
Source:
Acta Geologica Sinica-English Edition, 2008, 82, 6, 1201-1212
Publisher:
  • Wiley-Blackwell Publishing, Inc, Malden
Projects:
  • Ministry of Science and Environmental Protection of the Government of the Republic of Serbia

DOI: 10.1111/j.1755-6724.2008.tb00722.x

ISSN: 1000-9515

WoS: 000262540000015

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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/384
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