Formation of subsurface shallow gas accumulations in Amurskiy Bay (Peter the Great Bay, Sea of Japan) as a result of postglacial sea-level change, paleoceanographic conditions and hydrological activity

Karnaukh, V. N.; Астахов, А. С.; Vereshchagina, O. F.; Tsoy, I. B.; Kosmach, Denis; Sagalaev, S. G.; Volkova, T. I.; Dubina, V. A.; Prushkovskaya, I. A.

doi:10.1016/j.margeo.2015.12.004

Cited by 18 publications

(17 citation statements)

References 22 publications

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“…These were indicated by various kinds of fluid vents (e.g., by pinnacles and pockmarks). Sea level drop at the late Pleistocene along with intensive erosion, predefined a new position of a shallow gas horizon in the Amurskiy Bay (Sea of Japan) sediments, resulting from the deep rock coal degassing (Karnaukh et al, 2016).…”

Section: 1029/2019gl083100mentioning

confidence: 99%

Methane Bubble Escape From Gas Horizon in Muddy Aquatic Sediment Under Periodic Wave Loading

Katsman

2019

Geophysical Research Letters

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Ebullition of greenhouse methane (CH4) from the aquatic sediments is often observed at various hydrostatic pressure drops: at low tides, waves, and even at atmospheric pressure drops. It is especially pronounced at the different vent structures, for example, pockmarks, mud volcanoes, and cold seeps. The modeling conducted in the current study suggests that long timescale (glacial to centennial frequency) sea level drops may induce “stable” bubble ascent and control the position of the gas horizon in muddy aquatic sediment. Bubbles escape in the “dynamic” regime from the shallow gas horizon and subsequently to the water column is more feasible under shorter‐period waves of higher amplitude travelling in shallow water. These findings are illustrated by examples of various vent structures (e.g., pockmarks), pronounced in shallow straits and bays, described in the literature.

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Section: 1029/2019gl083100mentioning

confidence: 99%

Methane Bubble Escape From Gas Horizon in Muddy Aquatic Sediment Under Periodic Wave Loading

Katsman

2019

Geophysical Research Letters

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“…Карта Амурского залива и местоположение изученных колонок А12-4 и А12-5. Топографическая основа карты построена по данным SRTM (Karnaukh et al, 2016). Изобаты проведены через 2.5 м.…”

Section: геолого-географическая и океанологическая обстановкиunclassified

“…The map of Amur Bay and the location of the studied cores A12-4 and A12-5. The topography of the map is based on SRTM data (Karnaukh et al, 2016). Isobaths are drown each 2.5 m. воды также сильно варьирует в зависимости от сезона: весной минимальные значения (28‰) отмечены в кутовой части залива, летом соленость в заливе составляет около 20‰, а в целом не превышает 32.5‰, зимой соленость воды на всей акватории залива близка к 34‰ (Подорванова и др., 1989).…”

Section: геолого-географическая и океанологическая обстановкиunclassified

“…Этот индикатор был предложен для выявления палеотайфунов в шельфовых отложениях с однородным литологическим составом (Астахов и др., 2015). Диатомеи, являющиеся основным продуцентом экосистемы Амурского залива (Орлова и др., 2009;Рябушко, Бегун, 2015, 2016Стоник, Орлова, 1998;Stonik, Orlova, 2002) и многочисленные в его поверхностных осадках (Цой, Моисеенко, 2013, 2014), контролируют непрерывное биогенное осадконакопление в этом районе. Резкие изменения концентрации диатомей в осадках последних 150 лет связаны, вероятно, с экстремальными событиями в этом районе (Tsoy et al, 2015).…”

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The Impact of Typhoons on the Content of Diatoms in Sediments From Amur Bay (Sea of Japan) Over the Last 150 Years

Прушковская¹

2019

Bulletin of KRAESC. Earth Sciences

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“…Shallow gas features can be formed in diverse environments such as in sea-beds and on continental shelves (SCHROOT; SCHÜTTENHELM, 2003;EMEIS et al, 2004, respectively), loughs (LAFFERTY et al, 2006) or bays BENNIKE, 2009;KARNAUKH et al, 2016) and rías (DIEZ et al, 2007;GARCIA-GIL et al, 2002;DUARTE et al, 2007;IGLESIAS;, since these environments provide favorable conditions for their formation. In Brazil, the presence of these features has been described by various authors such as VITAL and STATTEGGER (1997) in the lowest stretch of the Amazon River; FIGUEIREDO and NITTROUER (1995) and FIGUEIREDO et al (1996) in the Amazon submarine delta and COSTA and FIGUEIREDO (1998) on the Amazon Continental Shelf; BAPTISTA NETO et al (2011) in Rodrigo de Freitas Lagoon -Rio de Janeiro; BENITES et al (2015) in Saco do Mamangua, Rio de Janeiro; BAPTISTA NETO et al (1996), QUARESMA et al (2000) and CATANZARO et al (2004) in Guanabara Bay, Rio de Janeiro; WESCHENFELDER et al (2006) in Patos Lagoon -Rio Grande do Sul associated with low-lying paleotopographical features such as paleo river channels and/or valleys; SCHWARZER et al (2006) in the Rio Açu Canyon and FRAZÃO and VITAL (2007) in the Potengy estuary, both in Rio Grande do Norte; FÉLIX (2012) in the Bertioga Channel, São Paulo;andSOUZA et al (2011), DEMARCO et al (2012), GUESSER et al (2012) andWESCHENFELDER et al (2016) presented preliminary results for the North Bay and the Conceição Lagoon -on the Santa Catarina Coast (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil

et al. 2016

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This paper presents the spatial distribution of shallow gas structures and classifies them on the basis of two different data sets of CHIRP seismic records, one from the Conceição Lagoon (CL) and the other from North Bay (NB), both on Santa Catarina Island, Southern Brazil. Side scan sonar data from the CL were used to facilitate the understanding. The sub bottom (SB) seismic data were processed and interpreted by means of the SeisPrho software, the side scan sonar (SSS) data by SonarWiz5 software and the spatial extension being measured with the help of GIS. The shallow gas structures were defined in accordance with their shapes in the seismic recordings (echo-character). At the CL, shallow gas accumulations were found in the form of seepages and features presenting shallow gas structures between the surface and 8.20 ms (around 12.3 m). Accumulations of gas were found in the form of Acoustic Blanking with Acoustic Plume, and also Black Shadows. Pockmarks were found on the lagoon floor and associated with gas seepages (average size diameter 0.97 ± 0.19 m and density from 54 to 242 units per 50 m2). In the NB three types of shallow gas features were found in the seismic profile, namely Acoustic Blanking, Turbidity Pinnacles and Intra-sedimentary plumes. The depth varied from the surface to 12.10 ms (around 18.15 m). In both environments, the gas is escaping from the sediment into the water column. The Pockmarks in the CL and the Acoustic Plume features and sediment rich in total sulfur in the NB validate these findings.

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Formation of subsurface shallow gas accumulations in Amurskiy Bay (Peter the Great Bay, Sea of Japan) as a result of postglacial sea-level change, paleoceanographic conditions and hydrological activity

Cited by 18 publications

References 22 publications

Methane Bubble Escape From Gas Horizon in Muddy Aquatic Sediment Under Periodic Wave Loading

Methane Bubble Escape From Gas Horizon in Muddy Aquatic Sediment Under Periodic Wave Loading

The Impact of Typhoons on the Content of Diatoms in Sediments From Amur Bay (Sea of Japan) Over the Last 150 Years

Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil

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