Late Cenozoic fluvial development within the Sea of Azov and Black Sea coastal plains

Matoshko, Andrei V.; Gozhik, P.F.; Semenenko, V. N.

doi:10.1016/j.gloplacha.2009.03.003

Cited by 18 publications

(24 citation statements)

References 18 publications

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“…a, Popov et al ., ; Matoshko et al ., and references therein). Following a carbonatic‐clastic shallow marine deposition during the Sarmatian, uppermost Miocene‐Pliocene sediments in the corridor record an overall transition from near‐shore marine to fluvio‐deltaic deposition during transgressive and high‐stand intervals (Gozhik et al ., ; Matoshko et al ., ). This sedimentation was interrupted by two erosional periods during the (Lower?)…”

Section: Formation and Miocene‐pliocene Evolution Of The Dacian – Blamentioning

confidence: 98%

Effects of large sea‐level variations in connected basins: theDacian–Black Sea system of theEasternParatethys

et al. 2012

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Sea‐level changes provide an important control on the interplay between accommodation space and sediment supply, in particular, for shallow‐water basins where the available space is limited. Sediment exchange between connected basins separated by a subaqueous sill (bathymetric threshold) is still not well understood. When sea‐level falls below the bathymetric level of this separating sill, the shallow‐water basin evolution is controlled by its erosion and rapid fill. Once this marginal basin is filled, the sedimentary depocenter shifts to the open marine basin (outward shift). With new accommodation space created during the subsequent sea‐level rise, sediment depocenter shifts backwards to the marginal basin (inward shift). This new conceptual model is tested here in the context of Late Miocene to Quaternary evolution of the open connection between Dacian and Black Sea basins. By the means of seismic sequence stratigraphic analysis of the Miocene‐Pliocene evolution of this Eastern Paratethys domain, this case study demonstrates these shifts in sedimentary depocenter between basins. An outward shift occurs with a delay that corresponds to the time required to fill the remaining accommodation space in the Dacian Basin below the sill that separates it from the Black Sea. This study provides novel insight on the amplitude and sedimentary geometry of the Messinian Salinity Crisis (MSC) event in the Black Sea. A large (1.3–1.7 km) sea‐level drop is demonstrated by quantifying coeval sedimentation patterns that change to mass‐flows and turbiditic deposits in the deep‐sea part of this main sink. The post‐MSC sediment routing continued into the present‐day pattern of Black Sea rivers discharge.

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Section: Formation and Miocene‐pliocene Evolution Of The Dacian – Blamentioning

confidence: 98%

Effects of large sea‐level variations in connected basins: theDacian–Black Sea system of theEasternParatethys

et al. 2012

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“…documented at 110-140 m asl between Tuapse and Sochi vary from about 400 ka (Nesmeyanov, 1995) to about 600 ka (Matoshko, Gozhik & Semenenko, 2009). This would imply rock uplift rates of ∼ 0.2-0.3 mm a −1 .…”

Section: Previous Workmentioning

confidence: 99%

The exhumation of the western Greater Caucasus: a thermochronometric study

Vincent

Carter

Lavrishchev³

et al. 2010

Geol. Mag.

124

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-This study provides 39 new thermochronometric analyses from the western part of the Greater Caucasus, a region in which existing data are extremely limited and of questionable quality. The new results are consistent with field studies that identify Triassic to Middle Jurassic (Cimmerian) and Oligo-Miocene (Alpine) orogenic erosional events. An inverse relationship between the fission track and depositional ages of Oligo-Miocene sedimentary samples also implies some degree of Eocene erosion of the Greater Caucasus and intermediate sediment storage. Cooling ages and field relationships within the core of the range, west of Mt Elbrus, require ∼ 5 km of Permo-Triassic exhumation and restrict the overall amount of Cenozoic exhumation to ∼ 2.5 km. Current exhumation rates are typically low, and do not support a Plio-Pleistocene increase in climate-driven denudation. High (∼ 1 km Ma −1 ) rates of exhumation are restricted to the southern flank of the range in northwest Georgia. Despite a general lack of significant seismicity within the study region, this exhumation peak is close to the largest instrumentally recorded earthquake in the Caucasus (Ms = 7.0). This may suggest that exhumation is associated with the decoupling of the sedimentary succession from its crystalline basement in the southern part of the range and the inversion of the largely Jurassic fill of the Greater Caucasus basin. Rates of exhumation are compatible with this being driven by active shortening. Further sampling and analysis are required to provide a higher-resolution, low-temperature thermochronology of Alpine exhumation, to isolate the drivers for Palaeogene Dziruli Massif cooling and uplift, and to constrain better the extent of the current, localized phase of rapid exhumation.

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“…Establishing the water level at which the Black Sea stabilizes is difficult and will depend on the balance between precipitation, evaporation, and riverine input. On the basin margins, highstands are predominantly recorded and create a discontinuous record separated by erosional unconformities (Zubakov, 1988;Matoshko et al, 2004Matoshko et al, , 2009Popov et al, 2010). In the basinal part of the Black Sea deposition should be more continuous.…”

Section: Geological Setting Of the Black Seamentioning

confidence: 99%

A Greigite-Based Magnetostratigraphic Time Frame for the Late Miocene to Recent DSDP Leg 42B Cores from the Black Sea

et al. 2016

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Throughout the Late Neogene, the Black Sea experienced large paleoenvironmental changes, switching between (anoxic) marine conditions when connected to the Mediterranean Sea and (oxic) freshwater conditions at times of isolation. We create a magnetostratigraphic time frame for three sites drilled during Deep Sea Drilling Project (DSDP) Leg 42B to the Black Sea (drilled in 1975). At the time, magnetostratigraphic dating was impossible because of the presence of the little understood iron sulfide mineral greigite (in sediments a precursor to pyrite) as magnetic carrier. Our rock-magnetic results indicate that only anoxic conditions result in poor magnetic signal, likely as a result of pyrite formation in the water column rather than in the sediment. The magnetostratigraphic results indicate that Hole 379A, drilled in the basin center, has a continuous sedimentary record dating back to 1.3 Ma. Hole 380/380A is subdivided into three consistent intervals, 0-700 mbsf, 700-860 mbsf, and 860-1075 mbsf. The top unit covers the Pleistocene but the magnetostratigraphy is likely compromised by the presence of mass transport deposits. The middle unit spans between 4.3 and 6.1 Ma and records continuous deposition at ∼10 cm/kyr. The lower unit lacks the independent age constraints to correlate the obtained magnetostratigraphy. Hole 381 is drilled on the Bosporus slope and as a result, hiatuses are common. A correlation to the nearby Hole 380/380A is proposed, but indicates deposits cannot straightforwardly be traced across the slope. Our improved age model does not support the original interpretation based on these cores of a desiccation of the Black Sea during the Messinian salinity crisis.

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Late Cenozoic fluvial development within the Sea of Azov and Black Sea coastal plains

Cited by 18 publications

References 18 publications

Effects of large sea‐level variations in connected basins: theDacian–Black Sea system of theEasternParatethys

Effects of large sea‐level variations in connected basins: theDacian–Black Sea system of theEasternParatethys

The exhumation of the western Greater Caucasus: a thermochronometric study

A Greigite-Based Magnetostratigraphic Time Frame for the Late Miocene to Recent DSDP Leg 42B Cores from the Black Sea

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