Sval'nov, Vyacheslav N; Alekseeva, Tatyana N; Gazenko, Alexander O (2011): Grain size, mineral and chemical compositions of modern deposits fron the northern Caspian Sea and the Volga River delta [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.763888, Supplement to: Sval'nov, VN et al. (2011): Modern deposits of the northern Caspian Sea and the Volga delta. Translated from Okeanologiya, 2011, 51(1), 123-135, Oceanology, 51(1), 118-130, https://doi.org/10.1134/S0001437011010188
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Abstract:
Comprehensive investigations revealed that modern deposits in the northern Caspian Sea involve terrigenous sands and aleurites with admixture of detritus and intact bivalve shells, including coquina. Generally, these deposits overlay dark grayish viscous clays. Similar geological situation occurs in the Volga River delta; however, local deposits are much poorer in biogenic constituents. Illite prevails among clay minerals. In coarse aleurite fraction (0.100-0.050 mm) heavy transparent minerals are represented mostly by epidotes, while light minerals - mostly by quartz and feldspars. Sedimentary material in the Volga River delta is far from completely differentiated into fractions due to abundant terrigenous inflows. Comparatively better grading of sediments from the northern Caspian Sea is due to additional factors such as bottom currents and storms. When passing from the Volga River delta to the northern Caspian Sea, sediments are enriched in rare earth elements (except Eu), Ca, Au, Ni, Se, Ag, As, and Sr, but depleted in Na, Rb, Cs, K, Ba, Fe, Cr, Co, Sc, Br, Zr, ??, U, and Th. Concentrations of Zn remain almost unchanged. Sedimentation rates and types of recent deposits in the northern Caspian Sea are governed mainly by abundant runoff of the Volga River.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 45.518779 * Median Longitude: 47.985901 * South-bound Latitude: 44.953300 * West-bound Longitude: 47.535000 * North-bound Latitude: 46.186000 * East-bound Longitude: 48.725000
Event(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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6 datasets
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Datasets listed in this publication series
- Sval'nov, VN; Alekseeva, TN; Gazenko, AO (2011): (Table 1a) Heavy mineral composition of 0.100-0.050 mm sise fraction from modern deposits of the northern Caspian Sea. https://doi.org/10.1594/PANGAEA.763873
- Sval'nov, VN; Alekseeva, TN; Gazenko, AO (2011): (Table 1b) Light mineral composition of 0.100-0.050 mm sise fraction from modern deposits of the northern Caspian Sea. https://doi.org/10.1594/PANGAEA.763877
- Sval'nov, VN; Alekseeva, TN; Gazenko, AO (2011): (Table 2) Grain size composition of modern deposits from the northern Caspian Sea and the Volga River delta. https://doi.org/10.1594/PANGAEA.763875
- Sval'nov, VN; Alekseeva, TN; Gazenko, AO (2011): (Table 3) Contents of organic carbon and calcium carbonate in modern deposits from the northern Caspian Sea and the Volga River delta. https://doi.org/10.1594/PANGAEA.763885
- Sval'nov, VN; Alekseeva, TN; Gazenko, AO (2011): (Table 4) Chemical composition of deposits from the northern Caspian Sea and the Volga River delta. https://doi.org/10.1594/PANGAEA.763886
- Sval'nov, VN; Alekseeva, TN; Gazenko, AO (2011): (Table 5) Rare earth element contents in modern deposits from the northern Caspian Sea and the Volga River delta. https://doi.org/10.1594/PANGAEA.763887