Timing of arrival of the Danube to the Black Sea: Provenance of sediments from <scp>DSDP</scp> site 380/380A

Leeuw, Arjan de; Morton, Andrew; Baak, Christiaan van; Vincent, Stephen J.

doi:10.1111/ter.12314

Cited by 13 publications

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References 28 publications

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“…The specific mineral composition of the Dolynske Mb. sand is very similar to that of sand from the present-day Danube and its tributaries in the Western Dacian Basin (de Leeuw et al 2018). This means that the Dolynske Mb.…”

Section: Late Porat Substage: Appearance Of Dolynske Valley and Arrivmentioning

confidence: 56%

“…The heavy mineral assemblage of the Dolynske Mb. (hornblende-epidote, opaque minerals) is similar to that of the present-day Danube and to those of rivers in the western Dacian Basin, which are also rich in epidote and have a comparatively small garnet component (de Leeuw et al 2018). Epidote is, on the contrary, very scarce in the sediments GEOLOGICA CARPATHICA, 2019, 70, 2, 91-112 of the Balta and Porat formations that were sourced from the Outer Carpathians, while these sediments contain a very predominant garnet component.…”

Section: The River Of the Dolynske Mbmentioning

confidence: 76%

“…According to Olariu et al (2018), the Danube appeared on the Romanian Black Sea shelf at about 4 Ma, as indicated by an increase in sediment volume above an intra-Dacian erosional surface and a coincident change in the architectural style in the adjacent deepwater fan. The only available dated provenance record from the Black Sea Basin (de Leeuw et al 2018), indicates that Danube-supplied sediment first arrived sometime between 4 Ma and 1 Ma ago, but does not provide more conclusive age constraints either. A factor that has remained completely under-addressed in in this discussion is the geology of the final gateway of the Danube to the Black Sea, which we address in detail here.…”

Section: Introductionmentioning

confidence: 99%

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The Plio–Pleistocene Demise of the East Carpathian Foreland Fluvial System and Arrival of the Paleo-Danube To The Black Sea

Matoshko¹,

Matoshko²,

Leeuw³

2019

Geologica Carpathica

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This paper studies the Porat Formation (Fm.), which was deposited along the NE margin of the Dacian Basin part of the East Carpathian foreland (ECF) during the Pliocene and Early Pleistocene. We use a review of stratigraphic data in combination with lithofacies and sedimentary architecture analysis to interpret the Porat Fm. as a large sandy alluvial basin infill with an aggradational structure, consisting of cyclic successions of shallow sandy high-energy braided rivers. Aggradation of the Porat Fan was governed by subsidence of the Dacian Basin, along with a northerly supply of water and sediment from the Carpathians. Along the southern margin of the area the fan entered the Reni–Izmail-Trough, which formed the periodically active gateway between the Black Sea and Dacian basins. Along this trough, the Porat Fm. is developed in a different facies, discerned as the Dolynske Member (Mb. 1), which accumulated in the channel of a large river interpreted as the paleo-Danube. According to mammal stratigraphy of the Porat Fm. this continental-scale river had reached the area by the Gelasian to early Calabrian. The Porat alluvial infill indicates a stable water supply from the Carpathians, which explains the ecologically mixed fauna in its deposits: moistened forested alluvial plain-valleys were present between the zonally semi-arid steppe interfluves. The Porat Fm. and the previously studied late Miocene Balta Fm. are key elements for further in-depth study of the terrestrial evolution (tectonic–sedimentary–relief) of the ECF and north-western Black Sea coastal regions.

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Section: Late Porat Substage: Appearance Of Dolynske Valley and Arrivmentioning

confidence: 56%

Section: The River Of the Dolynske Mbmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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The Plio–Pleistocene Demise of the East Carpathian Foreland Fluvial System and Arrival of the Paleo-Danube To The Black Sea

Matoshko¹,

Matoshko²,

Leeuw³

2019

Geologica Carpathica

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“…4 Ma) indicates the arrival of the Danube‐transported sediments into the Black Sea sink (Figure e). The only available provenance study (de Leeuw, Morton, Baak, & Vincent, ) dates the arrival of the Danube to the Black Sea between 4.36 and 1 Ma and thus is in accord with the above hypothesis. Dating of the Late Neogene deposits of the Euxinian basin still holds significant uncertainty, and more reliable age data are needed to confirm these interpretations.…”

Section: Discussion: What Role Did the Proto‐danube Sedimentary Systementioning

confidence: 69%

Clinoforms as paleogeographic tools: Development of the Danube catchment above the deep Paratethyan basins in Central and Southeast Europe

2019

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The Miocene marine basins of Central and Southeast Europe, once comprising the Paratethys Sea, were gradually filled with sediments during the Neogene and turned to be the catchment area of the proto‐Danube and finally that of the modern Danube. Seismic data from various parts of the large Danube catchment area show that these several hundred meter deep basins were filled by lateral accretion of river‐transported sediments, appearing as shelf edge scale clinoform sets in seismic profiles. The direction of shelf edge progradation is NW to SE (N to S, W to E) in each basin, except for the Dacian basin where NE to SW direction prevails. The age of the clinoform sets is generally younging downstream: 19–18 Ma in the North Alpine Foreland basin, 14–13 Ma in the Vienna basin, 10–9 Ma in the Danube (Kisalföld) basin, 8.6–4 Ma in the Central Pannonian basin (Alföld), ?9–5 Ma in the Dacian basin, and 6–0 Ma in the Euxinian (Black Sea) basin. In spite of this geographical and temporal pattern, only the Danube (Kisalföld) and the western and central part of the Central Pannonian basin were filled by the proto‐Danube shelf accretion. Formation of the Danube, as a longitudinal river of the Alpine foreland that gradually elongated to the east and followed the retreating shoreline of the Paratethys, most probably took place at the beginning of the Late Miocene, ca. 11 Ma ago, thus the Early and Middle Miocene shelf advance in the North Alpine Foreland and Vienna basins, respectively, cannot be attributed to a „paleo‐Danube”. The clinoform systems of the Dacian basin are coeval with those of the upstream Central Pannonian basin, indicating that by the time the Danube sedimentary system reached the Dacian basin, it was already a shallow basin. The vast clinoforms of the northwestern Euxinian shelf also significantly overlap in age with the Pannonian basin ones; only the <4 Ma part of the shelf accretion can be attributed to the Danube sensu stricto.

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“…Subsurface and outcrop data can then be used to further recognize sediment pathways within the basin. The drainage pattern present today on the western margin of the Black Sea (dominated by the Danube) bears little relationship to the drainage planform that would have been present during Maykop Suite deposition, with the Danube only reaching the Black Sea in the relatively recent geological past (de Leeuw et al 2017). Instead, during the time of Maykop Suite deposition, a major river (the palaeoKamchia) can be envisaged running axially through the foredeep to the north of the Balkanides and transporting sediment derived from granitic, gneissic and older sandstone source areas.…”

Section: Hydrocarbon Plays Of the Western Black Seamentioning

confidence: 99%

Petroleum geology of the Black Sea: introduction

Simmons

Tari

Okay

2018

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Abstract:The exploration for petroleum in the Black Sea is still in its infancy. Notwithstanding the technical challenges in drilling in its deep-water regions, several geological risks require better understanding. These challenges include reservoir presence and quality (partly related to sediment provenance), and the timing and migration of hydrocarbons from source rocks relative to trap formation. In turn, these risks can only be better understood by an appreciation of the geological history of the Black Sea basins and the surrounding orogens. This history is not without ongoing controversy. The timing of basin formation, uplift of the margins and facies distribution remain issues for robust debate. This Special Publication presents the results of 15 studies that relate to the tectonostratigraphy and petroleum geology of the Black Sea. The methodologies of these studies encompass crustal structure, geodynamic evolution, stratigraphy and its regional correlation, petroleum systems, source to sink, hydrocarbon habitat and play concepts, and reviews of past exploration. They provide insight into the many ongoing controversies regarding the geological history of the Black Sea region and provide a better understanding of the geological risks that must be considered for future hydrocarbon exploration. The Black Sea remains one of the largest underexplored rift basins in the world. Although significant biogenic gas discoveries have been made within the last decade, thermogenic petroleum systems must be proven through the systematic exploration of a wide variety of play concepts.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.The Black Sea, located between Russia, Georgia, Turkey, Bulgaria, Romania and Ukraine, covers an area of approximately 423 000 km 2 with a maximum water depth of 2245 m. Sedimentary thickness can exceed 14 km. The Black Sea holds an abiding fascination for petroleum geologists and is a true frontier basin with very few wells drilled in its deepwater sector. Abundant seepage, outcrops of potential source rocks around its margins, large potential traps imaged on seismic data, and a variety of potential reservoir and play concepts point towards considerable potential to reward the successful explorer. This volume brings together several geoscience studies (Fig. 1) that provide additional information about the origins of the Western and Eastern Black Sea basins, their tectonostratigraphic history, sedimentary fill and petroleum potential.The Black Sea and its surrounding regions have a long history of geological research: for example, it has long been regarded as the type example of an euxinic basin in which bottom water anoxia and free hydrogen sulphide (H 2 S) result in an absence of benthonic life and the preservation of organic matter (Wignall 1994). Somewhat ironically, the term 'euxinic' is derived from an ancient Greek name for the sea, Pontus Euxinus, meaning the welcoming or hospitable sea. Another ancient Greek name (probably derived from an Iranian nam...

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Timing of arrival of the Danube to the Black Sea: Provenance of sediments from DSDP site 380/380A

Cited by 13 publications

References 28 publications

The Plio–Pleistocene Demise of the East Carpathian Foreland Fluvial System and Arrival of the Paleo-Danube To The Black Sea

The Plio–Pleistocene Demise of the East Carpathian Foreland Fluvial System and Arrival of the Paleo-Danube To The Black Sea

Clinoforms as paleogeographic tools: Development of the Danube catchment above the deep Paratethyan basins in Central and Southeast Europe

Petroleum geology of the Black Sea: introduction

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