Middle Holocene to present sedimentary environment in the easternmost Gulf of Finland (Baltic Sea) and the birth of the Neva River

Virtasalo, Joonas J.; Ryabchuk, Daria; Kotilainen, Aarno; Zhamoida, Vladimir; Grigoriev, A. G.; Sivkov, Vadim; Dorokhova, Evgenia

doi:10.1016/j.margeo.2014.02.003

Cited by 25 publications

(25 citation statements)

References 66 publications

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“…The well-preserved vertical burrows in cores PC-12, PC-14, and PC-07 can be interpreted as representing escape or survival paths due to rapid sedimentation (cf. Allison et al 2005;Virtasalo et al 2014). The high sedimentation rates suggest that sediment was supplied by storm-generated turbulent flows, which is consistent with the frequent passage of typhoons in summer.…”

Section: Sedimentation Historysupporting

confidence: 60%

“…The cyclic units of sharp troughs with high sedimentation rates in subaqueous delta clinoforms are interpreted as having originated from storm-generated currents (Allison et al 2005;Wang et al 2005;Virtasalo et al 2014). Cores PC-12 and PC-14 obtained from the central DMDs are characterized by laminated muds displaying distinct erosional surfaces (Fig.…”

Section: Sedimentation Historymentioning

confidence: 99%

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Late Holocene distal mud deposits off the Nakdong delta, SE Korea: evidence for shore-parallel sediment transport in a current-dominated setting

et al. 2015

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The distal mud deposits (DMDs) off the Nakdong delta represent a subaqueous delta on the inner continental shelf aligned parallel to the southeast coast of Korea and displaying a clinoform geometry. Hydrographically, the coast is characterized by a micro-tidal regime, the strong Korean Coastal Current (KCC) and the East Korean Warm Current (EKWC). Age models and sedimentary facies related to the clinoform geometries are based on high-resolution chirp subbottom profile data and have provided information on shore-parallel sediment transport and accumulation during the late Holocene sea-level highstand. The highest sedimentation rates (6.19-9.17 cm/year) produced steep foresets in the central DMDs at water depths of 35-50 m. Here, vertical burrows are repeatedly truncated by laminated mud packages displaying erosional surfaces. This region represents the main depocenter of the Nakdong subaqueous delta. The topset sediments of the southern DMD at~40 m water depth closer to the river mouth show relatively low sedimentation rates (0.01-0.12 cm/year). Here, the muds have a predominantly mottled character. Similarly, the foreset sediments of the northern DMD at~71-80 m water depth with sedimentation rates of 0.10-2.03 cm/year are also predominantly characterized by mottled muds. The spatial dispersal pattern of the DMDs is consistent with the coast-parallel front between the KCC and EKWC along the southeast Korean coast. In addition, the depocenter of the Nakdong subaqueous delta clinoform is affected by the nearbed turbulence generated by episodic storm events.

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Section: Sedimentation Historysupporting

confidence: 60%

Section: Sedimentation Historymentioning

confidence: 99%

Late Holocene distal mud deposits off the Nakdong delta, SE Korea: evidence for shore-parallel sediment transport in a current-dominated setting

et al. 2015

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“…According to the diffuse double layer theory, an increase in pore fluid salinity causes a decrease of diffuse double layer thickness and consequently an increase of attractive forces between fine particles [8] , finally increases the consolidation degrees on the early stage of consolidation. But as the salinity continues to increase, more valence cations rush into the adsorption layer to make the particle charge reversal.…”

Section: Discussionmentioning

confidence: 99%

Study on the sediment consolidation process under different salinity fields in the Yellow River Estuary

Xiong¹,

Shan

Zhang

et al. 2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract.A field experiment was carried out on an intertidal flat of the Yellow River delta to study the consolidation process of sediments under different salinity fields. Three test pits were excavated to simulate newly deposited seabed by backfilling well-mixed sediments with water in different salinities. Wave parameters and pore water pressure evolutions throughout the consolidation process were recorded. Results were listed as follows: during the rapid consolidation stage, salinity has a promoting effect on the increase of consolidation degree. While during the normal consolidation stage, there is an optimal salinity value to make the consolidation degree the highest.

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“…ka BP (Fig. ka BP (Yakovlev 1925;Koshechkin & Ekman 1993;Malakhovskiy et al 1993;Saarnisto & Gr€ onlund 1996;Dolukhanov et al 2009;Subetto 2009;Saarnisto 2012), although the precise timing remains under discussion (Kulkova et al 2014;Virtasalo et al 2014;Ludikova 2015). 2D).…”

Section: Temporal Changes In D 18 O Diatom Diatom Taxonomy and Lakementioning

confidence: 99%

“…The formation of the current lake water system began after deglaciation around 14 cal. ka BP (Saarnisto 2012;Kulkova et al 2014;Virtasalo et al 2014), resulting in the formation of the Neva River outlet in the southern part of the lake (Saarnisto & Gr€ onlund 1996;Subetto et al 1998Subetto et al , 2002Dolukhanov et al 2009). At about 10.7-10.3 cal.…”

mentioning

confidence: 99%

Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes

Kostrova

Meyer

Bailey

et al. 2019

Boreas

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This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (d 18 O diatom ) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The d 18 O diatom values range from +29.8 to +35.0&, and relatively higher d 18 O diatom values around +34.7& between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in d 18 O diatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8-0.2 cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower d 18 O diatom values, whereas lower lake levels cause higher d 18 O diatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4-4.0 cal. ka BP. Generally, overall high d 18 O diatom values around +33.5& characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga d 18 O diatom record is roughly in line with the 60°N summer insolation, a linkage to broader-scale climate change is likely.

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Middle Holocene to present sedimentary environment in the easternmost Gulf of Finland (Baltic Sea) and the birth of the Neva River

Cited by 25 publications

References 66 publications

Late Holocene distal mud deposits off the Nakdong delta, SE Korea: evidence for shore-parallel sediment transport in a current-dominated setting

Late Holocene distal mud deposits off the Nakdong delta, SE Korea: evidence for shore-parallel sediment transport in a current-dominated setting

Study on the sediment consolidation process under different salinity fields in the Yellow River Estuary

Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes

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