The Effects of Neotectonic Movements on the Recent Sedimentation of the SW Black Sea

Konuk, Y. T.; Ergün, Mustafa; Avcı, Mert; Duman, Muhammet

doi:10.1007/978-94-011-2608-3_24

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…The impact of turbidity currents on Black Sea FeeS cycling 4.3.1. Changes in Fe chemistry during turbidite transport, deposition and burial The southwest margin of the Black Sea is seismically very active with frequent earthquake-related mass movement events (Konuk et al 1991;Konovalov et al 2007;Yücel et al 2010b). Our work adds to existing knowledge on the turbidite distribution and geochemistry of sediments in the deep Black Sea.…”

Section: Sediment Geochemistry On the Southwestern Black Sea Slope (Station 13)mentioning

confidence: 81%

“…These high rates contrast with the relatively low solid-phase S content of 99 ± 38 μmol g −1 . This would require sedimentation rates of several cm per year, which would be exceptionally high for non-turbidite Black Sea sediments (Konuk et al 1991;Crusius and Anderson 1992). We instead propose that periodic reworking of the mobile muds on the SW slope, possibly related to the same mass movement processes that drive turbidity currents, may help explain this mismatch between pore-water chemistry (high sulfide production) and sediment composition (low sulfide) that is in fact typical for non-steady state diagenesis (Aller 1998).…”

Section: Sediment Geochemistry On the Southwestern Black Sea Slope (Station 13)mentioning

confidence: 89%

“…In the northwest (NW) Black Sea, turbidites are the result of slope instability in the fan complexes of the major rivers (Danube, Dniepr/Dniestr) (Lericolais et al 2013). In the southwest (SW) Black Sea, seismic activity along the southern Black Sea margin associated with regional fracture zones (most notably the North Anatolian Fault) leads to earthquake-induced mass movements and turbidites (Konuk et al 1991;Konovalov et al 2007;Yücel et al 2010b). Turbidite-associated Fe transport and deposition differs fundamentally from the shelf-to-basin Fe shuttle.…”

Section: Introductionmentioning

confidence: 99%

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Turbidite deposition and diagenesis in the southwestern Black Sea: Implications for biogeochemical cycling in an anoxic basin

2019

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Section: Sediment Geochemistry On the Southwestern Black Sea Slope (Station 13)mentioning

confidence: 81%

Section: Sediment Geochemistry On the Southwestern Black Sea Slope (Station 13)mentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Turbidite deposition and diagenesis in the southwestern Black Sea: Implications for biogeochemical cycling in an anoxic basin

2019

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“…It was poised to mix upward and replace the then thin veneer of the brackish photic zone at ~7.8 ka, with little impetus. However, correlation of the event with the mudflow in GGC 66 and the 6 mm thick layer in GGC 79 raises the possibility that a seismic event along the North Anatolia Fault [ Konuk et al ., ] may have triggered the mudflow and disrupted the pycnocline that had maintained isolation of the Mediterranean‐derived bottom water for the previous 1.6 kyr.…”

Section: Element Sources and Accumulation Ratesmentioning

confidence: 99%

Geochemistry of the Black Sea during the last 15 kyr: A protracted evolution of its hydrography and ecology

Piper

2016

Paleoceanography

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The Black Sea is a 2200 m deep anoxic, marine sea connected to the Mediterranean Sea via the Dardanelles Strait, Marmara Sea, and the 3 km wide, 35 m deep Bosphorus Strait. The biogeochemistry of sediment from the Anatolia slope has recorded changes to the hydrography leading up to and following the input of Mediterranean water at ~9.4 ka (103 years B.P.), when global sea level rose to the level of the Bosphorus sill and high‐salinity water from the Mediterranean began to spill into the then brackish lake. The water initially mixed little with the lake water but cascaded to the bottom where it remained essentially isolated for ~1.6 kyr, the time required to fill the basin from the bottom up at its present input rate. The accumulation of Mo in the seafloor sediments, a proxy of bottom‐water anoxia, increased sharply at ~8.6 ka, when bacterial respiration in the bottom water advanced to SO42− reduction by the oxidation of organic detritus that settled out of the photic zone. Its accumulation remained elevated to ~5.6 ka, when it decreased 60%, only to again increase slightly at ~2.0 ka. The accumulation of Corg, a proxy of primary productivity, increased threefold to fourfold at ~7.8 ka, when upward mixing of the high‐salinity bottom water replaced the then thin veneer of the brackish photic zone in less than 50 years. From that time onward, the accumulation of Corg, Mo, and additional trace metals has reflected the hydrography of the basin and Bosphorus Strait, controlled largely by climate.

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Gravity analysis over the Aral, Black, and Caspian Seas from a combined GEOS 3/Seasat/Geosat altimeter data set

Welker¹,

Au²,

Brown³

1995

J. Geophys. Res.

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GEOS 3, Seasat and Geosat satellite altimetry data over the Aral, Black and Caspian Seas are processed using least squares collocation to predict geoid undulations and free‐air gravity anomalies on a 0.25° × 0.25° grid. A 180 × 180 geopotential model provides a reference surface for the collocation procedure and the framework for a regional map. Using local empirical covariance functions computed by an iterative numerical convolution technique, prediction accuracies of 24, 8, and 10 mGal were achieved for the Aral, Black, and Caspian Seas, respectively. Over the Caspian Sea, a hybrid theoretical/empirical covariance function was used to obtain reliable short‐wavelength gravity anomalies. The resulting regional gravity anomaly map confirms tectonic structures postulated by other investigators, reveals gravitational evidence of river sediments, and generally improves our knowledge of the geophysics of inland seas.

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The Effects of Neotectonic Movements on the Recent Sedimentation of the SW Black Sea

Cited by 3 publications

References 6 publications

Turbidite deposition and diagenesis in the southwestern Black Sea: Implications for biogeochemical cycling in an anoxic basin

Turbidite deposition and diagenesis in the southwestern Black Sea: Implications for biogeochemical cycling in an anoxic basin

Geochemistry of the Black Sea during the last 15 kyr: A protracted evolution of its hydrography and ecology

Gravity analysis over the Aral, Black, and Caspian Seas from a combined GEOS 3/Seasat/Geosat altimeter data set

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