The Characteristics and Distribution of Indicator Microorganisms in the Marine Sediments from the South-China Sea

Eskova, A. I.; Пономарева, А. Л.; Legkodimov, A. A.; Kalgin, V. Yu.; Shakirov, R. B.; Obzhirov, A.I.

doi:10.26516/2073-3402.2020.33.33

Cited by 3 publications

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“…According to microbiological surveys at sampling stations, methanotrophic organisms and a small number of sulfate-reducing bacteria were detected [84]. Methane concentrations in sediments vary from 2,860-9,460 nL/L.…”

Section: The Northern Gasgeochemical Provincementioning

confidence: 99%

“…The Red river fault crosses the basin in the North and the Tuy Hoa fault zone (shift). Also, according to the results of microbiological surveys at sampling stations along the axial fault, three groups of microorganisms were identified immediately: methanotrophic, hydrocarbon-oxidizing, and sulfate-reducing [84]. At the same time, the growth of some methanotrophic organisms was noted only at low temperatures.…”

Section: The сEntral Gasgeochemical Provincementioning

confidence: 99%

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Gasgeochemical features in the western part of the East Vietnam Sea (Bien Dong Sea)

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Nguyen

et al. 2022

VJMST

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During the joint Russian-Vietnamese studies in the East Vietnam Sea (known as Bien Dong or the South China Sea), manifestations of new hydrocarbon-accumulating zones were discovered; evidences of the presence of mineral indicators for solid minerals in shelf deposits were obtained; a unique zone, where accumulations of ferromanganese crusts and nodules have been formed, was revealed for the first time; evidence of unique properties of deep-water fine-dispersed carbonate sediments (which makes it possible to attribute them to an independent type of mineral resources of the East Vietnam Sea) were obtained; the ikaite mineral (that serves as an indicator of methane migration zones and cold marine paleo-conditions) was discovered in the Phu Khanh basin; heavy concentrates with indicators of rare forms of ore mineralization were collected; features of methane and mercury fluxes into the atmosphere, cultures of methane-oxidizing, oil-oxidizing and sulfate-reducing bacteria were registered for the first time within the study areas. New data on gravity and magnetic field anomalies along the shelf and slope of Vietnam have been obtained. The article presents the results of coastal geophysical and gasgeochemical research obtained in 2010–2020 within the Joint Russian-Vietnamese Laboratory for Marine Geosciences (POI FEB RAS - IMGG VAST). For the first time, anomalous methane fields (comparable to anomalies on the oil- and gas-bearing shelf and the gas hydrate-bearing slope of Sakhalin Island) were registered in the water column. The gravimagnetic survey was carried out on the central and southern shelf and the continental slope of Vietnam; the executed works supplemented the geophysical data, which had been obtained in the 80s–90s of the preceding century. The paper contributes to the Russia-Vietnamese program within the UN Decade of Ocean Sciences for Sustainable Development framework.

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Section: The Northern Gasgeochemical Provincementioning

confidence: 99%

Section: The сEntral Gasgeochemical Provincementioning

confidence: 99%

Gasgeochemical features in the western part of the East Vietnam Sea (Bien Dong Sea)

Сырбу

Nguyen

et al. 2022

VJMST

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Geological features for the formation of gas-geochemical fields, including helium and hydrogen, in the water and sediments at the Vietnamese part of the South-China Sea

et al. 2021

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The paper presents the results of a complex joint Russian-Vietnamese geological, geophysical and oceanographic expedition in the South-China Sea (R/V “Akademik M.A. Lavrentyev”, cruise 88, 2019), as well as related joint Russian-Vietnamese marine and land researches in the area of north and south Vietnam under a series of local FEB RAS – VAST grants. The organizers of the marine expedition are the V. I. Ilyichev Pacific Oceanological Institute of the Far Eastern Branch of the Russian Academy of Sciences (POI FEB RAS) and the Institute of Marine Geology and Geophysics of the Vietnam Academy of Science and Technology (IMGG VAST). In comparison with the Sea of Japan and the Sea of Okhotsk, it can be noted that the active bottom degassing on the on the Vietnamese shelf and slope have is a local, although the intensity of gas-geochemical anomalies is comparable to similar zones in the Far Eastern Seas. For the first time, anomalous methane fields (up to 5000 nl/l) were found in the water column of the South-China Sea, which are comparable to anomalies on the oil and gas shelf and the gas-hydrate-bearing slope of Sakhalin Island. Metamorphosed sedimentary and volcanic rocks were discovered for the first time in the southern part of Catba Island (Gulf of Tonkin), which indicates the introduction of an endogenous body into the sedimentary strata and its further transformation. In connection with the discovery in 2020 of the large Ken Bau gas field at the southern end of the sedimentary basin of the Red River, the forecast of POI scientists about the presence of significant hydrocarbon reserves in this area was confirmed. The work was carried out within the framework of the joint Vietnam-Russia Laboratory for Marine Sciences and Technology (V. I. Ilyichev Pacific Oceanological Institute of the Far Eastern Branch of the Russian Academy of Sciences and the Institute of Marine Geology and Geophysics Vietnam Academy of Science and Technology). The expedition of the R/V “Akademik M.A. Lavrentyev” (cruise 88) is part of a series of expeditions in accordance with the UN Decade dedicated to the Ocean Science for Sustainable Development.

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On the Influence of Tectonic and Hydro-Meteorological Conditions on Methane Genesis and Migration in the Western South China Sea

Kholmogorov,

Kulinich,

Vlasova

et al. 2024

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The Characteristics and Distribution of Indicator Microorganisms in the Marine Sediments from the South-China Sea

Cited by 3 publications

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Gasgeochemical features in the western part of the East Vietnam Sea (Bien Dong Sea)

Gasgeochemical features in the western part of the East Vietnam Sea (Bien Dong Sea)

Geological features for the formation of gas-geochemical fields, including helium and hydrogen, in the water and sediments at the Vietnamese part of the South-China Sea

On the Influence of Tectonic and Hydro-Meteorological Conditions on Methane Genesis and Migration in the Western South China Sea

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