Active mud volcanism in the West Alboran Basin: Geochemical evidence of hydrocarbon seepage

Blinova, V.; Comas, M. C.; Ivanov, M.K.; Poludetkina, E. N.; Matveeva, T.

doi:10.1016/j.marpetgeo.2011.06.001

Cited by 28 publications

(39 citation statements)

References 59 publications

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“…The presence of a relatively thick pelagic drape and cold-water coral rich layers on the top of the cores retrieved from the top of Dhaka and Maya MVs (60 cm and 115 cm; Margreth et al, 2011), as well as their geochemical signature suggests that they are not presently active, or are dormant with only residual seep activity (Blinova et al, 2011).…”

Section: Recent Volcanic Activitymentioning

confidence: 99%

“…Among them, the mud volcano named Carmen, discovered in 2004 during TTR-14, was proved to be active ( Fig. 1; Comas et al, 2000Comas et al, , 2003aComas et al, , 2003bComas et al, , 2006Comas et al, , 2010Kenyon et al, 2000Kenyon et al, , 2003Kenyon et al, , 2006Sautkin et al, 2003;Talukder et al, 2003;Blinova et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…1). As a result of this extensive survey, a new small mud volcano, named Maya, was discovered and cored for the first time (Blinova et al, 2011;Margreth et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the study of fluid discharged at different seep sites in the area proved that Carmen MV is presently active (Blinova et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Sedimentary sources of the mud-breccia and mud volcanic activity in the Western Alboran Basin

et al. 2013

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During the TTR-17 Leg 1 cruise in the West Alboran Basin, gravity cores were acquired from three mud volcanoes (MVs): Dhaka, Carmen and the recently discovered Maya. This paper presents micropaleontological and radiocarbon dating results from the three mud volcanoes, using cores containing mud breccias overlain by and interbedded with hemipelagic sediments. At Dhaka MV, the mud-breccia matrix contains very rare Holocene planktonic foraminifera associated with abundant reworked specimens of mixed Late Cretaceous to Mio-Pliocene age. At Carmen MV, the reworked assemblage is dominated by Miocene to Pliocene foraminifera occurring together with rare Late Cretaceous species while at Maya MV the mud-breccia matrix is characterized by the dominance of Santonian-Maastrichtian forms, with subordinate Tertiary species. Shallow-water benthic foraminifera such as Ammonia spp. and Elphidium spp. are generally rare and randomly distributed, but present at all studied sites. Based on these results, we suggest that the main sediment source of the mud-breccia extruded at Dhaka, Carmen and Maya MVs is possibly the lowermost overpressured olistostromic Unit VI (Aquitanian?-Burdigalian). Differences in the micropaleontological composition of the mud-breccia matrix at different sites are most likely due to differences in the main source layer and in the plumbing systems underneath the MVs. Radiocarbon dating of hemipelagic sediments associated to the mud-breccia allowed to define the age of the latest extrusion activities (>0.27 ka to > 15.6 ka BP), which seem to be episodic, short-lived and recurrent over thousands of years.

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Section: Recent Volcanic Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…1). As a result of this extensive survey, a new small mud volcano, named Maya, was discovered and cored for the first time (Blinova et al, 2011;Margreth et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the study of fluid discharged at different seep sites in the area proved that Carmen MV is presently active (Blinova et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Sedimentary sources of the mud-breccia and mud volcanic activity in the Western Alboran Basin

et al. 2013

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“…Any seep may be composed of a single gas stream or several ones very close to each other such that they clearly define its perimeter. Submarine seeps, at cold seeps, occur worldwide along the continental margins and are usually related to geological structures with either positive reliefs such as submarine pingoes [1][2][3][4][5][6][7], carbonate concretions and pavements [8][9][10][11], and mud volcanoes [9,[12][13][14][15][16][17][18] or negative reliefs like pockmarks [13,[19][20][21][22][23]. They also occur in seafloor-reaching fault areas at tectonically active regions without being associated with a specific relief [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Gas Seepage along the Edge of the Aquitaine Shelf (France): Origin and Local Fluxes

et al. 2017

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During the scientific expedition GAZCOGNE2 at the Bay of Biscay nine gas seeps were sampled for the first time and their flux was measured using an in situ pressure-preservation sampler (PEGAZ, © IFREMER). Overall, three sites were investigated to determine the nature and the origin of the gases bubbling at the seafloor and forming acoustic plumes into the water column, as this was the question raised from the first geologic study of the area. This has guided our study and accordingly corresponds to the main purpose of the present article. Thus, the molecular and isotopic ( D and 13 C) analyses revealed that the gas seeps were primarily composed of methane. Both methane and ethane are of microbial origin, and the former has been generated by microbial reduction of carbon dioxide. Heavier hydrocarbons accounted for less than 0.06% mol of the total amount. Despite the microbial origin of methane, the samples exhibit subtle differences with respect to the 13 C CH 4 values, which varied between −72.7 and −66.1‰. It has been suggested that such a discrepancy was predominantly governed by the occurrence of anaerobic methane oxidation. The PEGAZ sampler also enabled us to estimate the local gas fluxes from the sampled streams. The resulting values are extremely heterogeneous between seeps, ranging from 35 to 368 mLn⋅min −1 . Assuming a steady discharge, the mean calculated methane emission for the nine seeps is of 38 kmol⋅yr −1 . Considering the extent of the seep area, this very local estimate suggests that the Aquitaine Shelf is a very appropriate place to study methane discharge and its fate on continental shelves.

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A Geological History for the Alboran Sea Region

Vázquez

Ercilla

Catalán

et al. 2021

Alboran Sea - Ecosystems and Marine Resources

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Active mud volcanism in the West Alboran Basin: Geochemical evidence of hydrocarbon seepage

Cited by 28 publications

References 59 publications

Sedimentary sources of the mud-breccia and mud volcanic activity in the Western Alboran Basin

Sedimentary sources of the mud-breccia and mud volcanic activity in the Western Alboran Basin

Gas Seepage along the Edge of the Aquitaine Shelf (France): Origin and Local Fluxes

A Geological History for the Alboran Sea Region

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