Deep faults, heat flow and gas leakage in the northern Black Sea

Кутас, Р. І.; Paliy, S. I.; Rusakov, О. M.

doi:10.1007/s00367-004-0172-3

Cited by 24 publications

(21 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4.1.A.). The region is wellknown for abundant gas seeps, carbonate buildups and shallow gas (Polikarpov et al, 1989;Polikarpov et al, 1992;Egorov et al, 1998;Luth et al, 1999;Peckmann et al, 2001;Thiel et al, 2001;Amouroux et al, 2002;Michaelis et al, 2002;Kruglyakova et al, 2004;Kutas et al, 2004;Popescu et al, 2004;Pape et al, 2005;Pimenov and Ivanova, 2005;Reitner et al, 2005;Schmale et al, 2005;Treude et al, 2005;McGinnis et al, 2006;Naudts et al, 2006). During the 58 th (May-June 2003) and 60 th (MayJune 2004) cruise of R.V.…”

Section: Study Areamentioning

confidence: 99%

Anomalous sea-floor backscatter patterns in methane venting areas, Dnepr paleo-delta, NW Black Sea

et al. 2008

View full text Add to dashboard Cite

The relation between acoustic seafloor backscatter and seep distribution is examined by integrating multibeam backscatter data and seep locations detected by single-beam echosounder. This study is further supported by side scan sonar recordings, high-resolution 5 kHz seismic data, pore-water analysis, grain-size analysis and visual seafloor observations. The datasets were acquired during the 2003 and 2004 expeditions of the EC-funded CRIMEA project in the Dnepr paleo-delta area, northwestern Black Sea.More than 600 active methane seeps were hydro-acoustically detected within a small (3.96 km by 3.72 km) area on the continental shelf of the Dnepr paleo-delta in water depths ranging from -72 m to -156 m. Multibeam and side scan sonar recordings show backscatter patterns that are clearly associated with seepage or with a present dune area. Seeps generally occur within medium-to highbackscatter areas which often coincide with pockmarks.High-resolution seismic data reveal the presence of an undulating gas front, i.e. the top of the free gas in the subsurface, which domes up towards and intersects the seafloor at locations where gas seeps and medium-to high-backscatter values are detected. Pore-water analysis of 4 multi-cores, taken at different backscatter intensity sites, shows a clear correlation between backscatter intensity and dissolved methane fluxes. All analyzed chemical species indicate increasing anaerobic oxidation of methane (AOM) from medium-to high-backscatter locations. This is confirmed by visual seafloor observations, showing bacterial mats and authigenic carbonates formed by AOM. Grain-size analysis of the 4 multi-cores only reveals negligible variations between the different backscatter sites.Integration of all datasets leads to the conclusion that the observed backscatter patterns are the result of ongoing methane seepage and the precipitation of methane-derived authigenic carbonates (MDACs) caused by AOM. The carbonate formation also appears to lead to a gradual (self-)sealing of the seeps by cementing fluid pathways/horizons followed by a relocation of the bubble-releasing locations. KeywordsMethane seeps; acoustic seafloor backscatter; anaerobic oxidation of methane; bacterial mats; pockmarks; methane-derived authigenic carbonates

show abstract

Section: Study Areamentioning

confidence: 99%

Anomalous sea-floor backscatter patterns in methane venting areas, Dnepr paleo-delta, NW Black Sea

et al. 2008

View full text Add to dashboard Cite

show abstract

“…[12] with the following symbols: (1) Gas hydrate sampling (see Table 1 in Vassilev and Dimitrov [12] for numbering); (2) areas with seismic indications of gas hydrates; (3) areas of high gas hydrates prospect; (4) mud volcanoes; (5) areas of intensive fluid discharging; (6) gas seepage and seabed pockmarks; (7) mine submarine fans. The solid lines are deep faults interpolated after Kutas et al [64].…”

Section: Introductionmentioning

confidence: 99%

Basin-wide estimates of the input of methane from seeps and clathrates to the Black Sea

Kessler

Reeburgh

Southon

et al. 2006

Earth and Planetary Science Letters

View full text Add to dashboard Cite

Numerous methane-emitting bottom features, such as seeps, methane clathrate hydrates (clathrates), and mud volcanoes, have been identified recently in the Black Sea. The fluxes of methane from these sources averaged over large spatial scales are unknown. Here we take advantage of the fact that the Black Sea is a semi-enclosed basin with restricted deep water circulation to establish firstorder estimates of basin-wide fluxes of methane from these sources to the water column and atmosphere. First, we measured the natural radiocarbon content of methane ( 14 C-CH 4 ) dissolved in the water column and emitted from seeps. The 14 C-CH 4 results showed that the dominant source of methane to the water column is emitted from seeps and a smaller source is diagenetically produced in relatively modern sediments. The 14 C-CH 4 results were then used to partition a basin-wide total methane budget; this analysis estimated the basin-wide flux of methane from seeps and clathrates to the water column to be 3.60 to 4.28 Tg yr − 1 . Second, a geochemical box model was used to calculate possible distributions of methane inputs from seeps and clathrates as well as provide additional estimates of the basin-wide flux of methane from seeps and clathrates to the water column (4.95 to 5.65 Tg yr − 1 ).

show abstract

“…Interpreting the BasinSPAN lines [Graham et al, 2013;Scheleder et al, 2015] revealed vast areas of the hyperextended continental crust in the Black Sea. There are some crustal fragments that one can classify them as suspect terranes [Howell, 1989] because it is difficult to determine their original positions The continental lithosphere was separated into two large blocks by the Precambrian OS fault zone of the sub-Moho origin, which was repeatedly rejuvenated up to now [Kravchenko et al, 2003;Kutas et al, 2004]. The preexisting long-lived deep tectonic disturbance has catalyzed the individual evolution of the sub-basins in the Black Sea [Starostenko et al, 2010[Starostenko et al, , 2015.…”

mentioning

confidence: 99%

The decisive role of the crystalline crust faults in the Black Sea opening.

Rusakov¹,

Pashkevich²

2017

Geofizicheskiy Zhurnal

View full text Add to dashboard Cite

Ðåçóëüòàòè ì³aeíàðîäíîãî ïðîåêòó Ãåîëîã³ÿ áåç êîðäîí³â áåççàñòåðåaeíî ï³äòâåðäèëè íàÿâí³ñòü ñèñòåìè ðîçëîì³â ó êðèñòàë³÷í³é êîð³ áàñåéíó ×îðíîãî ìîðÿ, âèä³ëåíèõ çà ãðàâ³-òàö³éíèìè ³ ìàãí³òíèìè äàíèìè. Ì³ñöÿ ðîçòàøóâàííÿ 135 ç ìàéaeå 150 ðîçëîì³â íà ¿¿ ïî-âåðõí³, îòðèìàíèõ çà äàíèìè àíàë³çó ñåéñì³÷íèõ ðîçð³ç³â ó ðàìêàõ öüîãî ïðîåêòó, ïîâí³ñ-òþ çá³ãàþòüñÿ ç ðîçëîìàìè âèä³ëåíî¿ ñèñòåìè. Âïåðøå íàâåäåíî äîêàçè âèð³øàëüíî¿ ðîë³ ðîçëîì³â êðèñòàë³÷íî¿ êîðè ó ðîçêðèòò³ áàñåéíó ×îðíîãî ìîðÿ. Äîâãî³ñíóþ÷à Îäåñüêî-Ñèíîïñüêà çîíà ðîçëîì³â äîêåìáð³éñüêîãî çàêëàäåííÿ ìàëà ïåðøîðÿäíå çíà÷åííÿ äëÿ öüî-ãî ïðîöåñó. Âîíà ðîçä³ëèëà ïðåäðèôòîâó êîíòèíåíòàëüíó êîðó íà äâà áëîêè, ÿê³ ÷³òêî âè-çíà÷åíî êîìïëåêñíèì ãåîô³çè÷íèì àíàë³çîì, ç ð³çíîþ ãåîëîã³÷íîþ ñòðóêòóðîþ. Çàõ³äíî-òà Ñõ³äíî÷îðíîìîðñüê³ çàïàäèíè ðîçêðèëèñÿ ï³ä âïëèâîì äâîõ ð³çíèõ ìåõàí³çìàì³â. Çàõ³ä-íà çàïàäèíà, çà âèíÿòêîì ¿¿ ñõ³äíî¿ ÷àñòèíè, áóëà ðîçêðèòà ïîçàäó êîíòèíåíòàëüíîãî ôðàã-ìåíòà, ÿêèé ïåðåì³ùóâàâñÿ íà ï³âäåííèé ñõ³ä óçäîâae äâîõ ïàðàëåëüíèõ çîí ãëèáèííèõ ðîç-ëîì³â: ë³âîñòîðîííüî¿ Îäåñüêî-Ñèíîïñüêî¿ (ñï³ëüíî ³ç Çàõ³äíîêðèìñüêî-Ïîíò³éñüêèì ðîç-ëîìîì) ³ ïðàâîñòîðîííüî¿ Áàëêàíñüêî-Ïîíò³éñüêî¿. ²íøà ÷àñòèíà áàñåéíó ×îðíîãî ìîðÿ óòâîðèëàñÿ âíàñë³äîê îáåðòàííÿ ïðîòè ãîäèííèêîâî¿ ñòð³ëêè âåëèêîãî êîíòèíåíòàëüíîãî áëîêà, ùî çóìîâèëî óòâîðåííÿ ðèôòó â Ñõ³äíî÷îðíîìîðñüê³é çàïàäèí³ òà ôîðìóâàííÿ çîíè ðîçëîì³â Îäåñüêî-Ñèíîïñüêî-Îðäó. Ïðàâîá³÷í³ çñóâè â ö³é çîí³ çóìîâèëè óòâîðåííÿ âîñüìè ïóëë-àïàðòîâèõ ëîêàëüíèõ áàñåéí³â ó ï³âäåííî-ñõ³äí³é ÷àñòèí³ Çàõ³äíî÷îðíîìîðñüêî¿ çàïà-äèíè. Îäåñüêî-Ñèíîïñüêà ñèñòåìà ðîçëîì³â ÿê äîâãî³ñíóþ÷à ñòðóêòóðà, ìîaeëèâî, êîíòðîëþº çì³íó ïðîñòÿãàíü Çàõ³äíèõ ³ Ñõ³äíèõ Ïîíòèä ³ ñó÷àñíå ðîçì³ùåííÿ ï³ä ãîñòðèì êóòîì îäíà äî îäíî¿ îñíîâíèõ ðèôòîâèõ îñåé ÷îðíîìîðñüêèõ çàïàäèí. Ï³âäåííî-ñõ³äíå ïðîäîâaeåííÿ Îäåñüêî-Ñèíîïñüêîãî ðîçëîìó ô³êñóº çàõ³äíó ìåaeó äîêðåéäÿíèõ â³äêëàä³â Ñõ³äíèõ Ïîíòèä.Êëþ÷îâ³ ñëîâà: ×îðíå ìîðå, êîíñîë³äîâàíà êîðà, ðîçëîìè, ìåõàí³çì ðîçêðèòòÿ.

show abstract

Deep faults, heat flow and gas leakage in the northern Black Sea

Cited by 24 publications

References 5 publications

Anomalous sea-floor backscatter patterns in methane venting areas, Dnepr paleo-delta, NW Black Sea

Anomalous sea-floor backscatter patterns in methane venting areas, Dnepr paleo-delta, NW Black Sea

Basin-wide estimates of the input of methane from seeps and clathrates to the Black Sea

The decisive role of the crystalline crust faults in the Black Sea opening.

Contact Info

Product

Resources

About