Earthquake-induced turbidite deposition as a previously unrecognized sink for hydrogen sulfide in the Black Sea sediments

Yücel, Mustafa
Moore, Willard S.
The depth profiles of excess Pb-210, Cs-137, elemental sulfur, reactive iron and porewater hydrogen sulfide of a western central basin sediment core in the Black Sea collectively point to the presence of a 20 cm thick reactive iron rich turbidite layer. This layer was most probably deposited there after the 1999 earthquakes in Northwestern Turkey, which caused oxidation of porewater hydrogen sulfide and anomalous accumulation of the product elemental sulfur in the solid phase.


Sulfur speciation in the upper Black Sea sediments
Yücel, Mustafa; Moore, Tommy S.; Janzen, Christopher P.; Luther, George W. (2010-01-30)
We report solid phase sulfur speciation of six cores from sediments underlying oxic, suboxic and anoxic-sulfidic waters of the Black Sea. Our dataset includes the five sulfur species [pyrite-sulfur, acid volatile sulfides (AVS), zerovalent sulfur (S(0)), organic polysulfides (RS(x)), humic sulfur] together with reactive iron and manganese, as quantified by dithionite extraction, and total organic carbon. Pyrite - sulfur was the major phase in all cores [200-400 mu mol (g dry wt)(-1)] except for the suboxic ...
Observed basin-wide propagation of Mediterranean water in the Black Sea
Falina, Anastasia; Sarafanov, Artem; Özsoy, Emin; Turunçoğlu, Ufuk Utku (2017-04-01)
Mediterranean water entering the Black Sea through the Bosphorus Strait forms middepth intrusions that contribute to the salt, heat, and volume balances of the sea, ventilate its water column at intermediate depths and restrain the upward flux of hydrogen sulfide from deeper layers. Despite the importance for the Black Sea environment, the circulation of Mediterranean-origin water in the basin is fundamentally underexplored. Here we use hydrographic data collected from ships and Argo profiling floats to ide...
Seafloor Iron Mobilization Across The Deep-Water Redox Gradients Of The Black Sea And The Sea Of Marmara
Alımlı, Nimet; Yücel, Mustafa; Department of Chemical Oceanography (2022-8)
Iron is one of the key elements in the ocean which has wide interconnections with other essential elements (i.e., C, N, P, O, Mn, S) and fundamental mechanisms (i.e., photosynthesis, respiration, chemosynthesis). The critical role of iron, since the beginning of life until the modern oceans, was increasing with biogeochemical evolution creating new niches for iron. Despite iron is ubiquitous on land, its trace level presence in the ocean creates difficulties for iron studies. Hence, the complex cycle of iro...
A comparative study of spectrophotometric and iodometric back titration methods for hydrogen sulfide determination in anoxic basins
Basturk, O; Romanov, A; Gokmen, S; Konovalov, S (2000-01-01)
Iodometric Back Titration (TBT) and Spectrophotometric (SPM) methods are two common methods used in the determination of hydrogen sulfide concentrations in anoxic basins, like in the upper sections of the Black Sea anoxic waters. Although the results obtained by both methods are in agreement when the concentrations of sulfide are higher than 30 mu M/l, IBT analysis gives more reproducible results compared to SPM analysis. On the other hand, the reproducibility of the SPM is better than that of IBT method wh...
Cross-sectional anatomy and geodynamic evolution of the Central Pontide orogenic belt (northern Turkey)
Hippolyte, JC; Espurt, Nikolas; Kaymakcı, Nuretdin; SANĞU, ERCAN; Mueller, C. (2016-01-01)
Geophysical data allowed the construction of a similar to 250-km-long lithospheric-scale balanced cross section of the southern Black Sea margin (Espurt et al. in Lithosphere 6:26-34, 2014). In this paper, we combine structural field data, stratigraphic data, and fault kinematics analyses with the 70-km-long onshore part of the section to reconstruct the geodynamic evolution of the Central Pontide orogen. These data reveal new aspects of the structural evolution of the Pontides since the Early Cretaceous. T...
Citation Formats
M. Yücel and W. S. Moore, “Earthquake-induced turbidite deposition as a previously unrecognized sink for hydrogen sulfide in the Black Sea sediments,” MARINE CHEMISTRY, pp. 176–186, 2010, Accessed: 00, 2020. [Online]. Available: