Sea-floor features related to hydrocarbon seeps in deepwater carbonate-mud mounds of the Gulf of Cádiz: from mud flows to carbonate precipitates

León, Ricardo; Somoza, Luı́s; Medialdea, Teresa; González, Francisco Javier; Díaz‐del‐Río, V.; Fernández-Puga, M.C.; Maestro, Adolfo; Mata, Pilar

doi:10.1007/s00367-007-0074-2

Cited by 90 publications

(55 citation statements)

References 29 publications

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“…This diapiric ridge was generated by the compressional regime and Pliocene-Quaternary sediments appear asymmetrically deformed on its flanks . A large variety of hydrocarbon seepage structures (such as carbonate mud mounds, mud volcanoes and HDACs) are visible in multibeam seismic profiles and submarine photographs along this ridge Fernández-Puga et al, 2007;León et al, 2007). At the base of the western flank of the GDR is the CCC running adjacent to the diapiric structure, the largest and most important contourite channel in the area (up to 8 km wide and 110 km long).…”

Section: Oceanographic and Geological Settingmentioning

confidence: 99%

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Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents

et al. 2012

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Section: Oceanographic and Geological Settingmentioning

confidence: 99%

“…Baraza and Ercilla, 1996;Gardner, 2001;Pinheiro et al, 2003;Somoza et al, 2003;Medialdea et al, 2004;León et al, 2007). Detailed information about the location and the geophysical methods used in this work can be found in the Fig.…”

Section: Oceanmentioning

confidence: 99%

Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents

et al. 2012

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“…León et al (2007) suggested that colonization of mud volcanoes by non-chemosynthetic organisms such as corals might be related to periods of slow seepage activity inducing the formation of carbonate crusts. Sediment cores from various mud volcanoes in the Gulf of Cadiz show sequences of mud breccia with intercalation of intervals rich in cold-water coral debris (Akhmetzhanov et al, 2007;Foubert et al, 2008).…”

Section: Similarities and Differences Of Faunal Assemblages Between Tmentioning

confidence: 99%

Growth and demise of cold-water coral ecosystems on mud volcanoes in the West Alboran Sea: The messages from the planktonic and benthic foraminifera

et al. 2011

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The Dhaka and Maya mud volcanoes (MVs), located in the Mud Diapir Province in the Western Alboran Basin along the Moroccan Coasts, were cored during the TTR-17, Leg 1 cruise. Cores were taken on the top of the volcanoes at a water depth of 370 m on the Dhaka MV (core TTR17-MS411G) and at 410 m water depth on the Maya MV (core TTR17-MS419G), respectively. On both mud volcanoes the extruded mud breccia provides the nucleation point for the colonization and development of cold-water corals and associated ecosystems. Two phases of cold-water coral growth are observed: (1) between slightly older than 4175± 62 years BP and around 2230± 59 years BP at Dhaka, and (2) between slightly older than 15583 ± 185 years BP and around 7613 ± 38 years BP at Maya MV. On the top of the Maya MV only a small patch reef and/or isolated corals proliferated, whereas a more extended patch reef colonized the top of the Dhaka MV. At both sites the cold-water coral development was triggered by the availability of a suitable substrate for initial coral settling, provided either as a firm ground or as single clasts. Subsequently coral growth was supported by enhanced nutrient flux possibly related to upwelling and/or strong currents. During the intervals of coral growth planktonic foraminiferal assemblages were dominated by Neogloboquadrina incompta. The decline of coral ecosystems on the mud volcanoes is accompanied at surface by a shift from the N. incompta dominated assemblage to a Globorotalia inflata dominated assemblage, possibly reflecting more oligotrophic conditions. This shift is coeval to the passage from wet to arid conditions at the end of the African Humid Period at Maya MV. It is interpreted as an effect of an early human impact on a fragile environment, which was already stressed by desiccation at the time of the development of complex human society along the Mediterranean coasts, at Dhaka MV.

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“…These organisms are favoured by the presence of hard bottoms with authigenic carbonates (e.g. chimneys, slabs) that are common on the seafloor of mud volcanoes with latent conditions (León et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

New records of recently described chemosymbiotic bivalves for mud volcanoes within the European waters (Gulf of Cádiz)

et al. 2012

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Chemosymbiotic bivalves are important members of cold seep communities and information on their distribution in the European waters is still quite scarce. This study reports the presence of living populations and shell remains of some recently described bivalves such as Lucinoma asapheus, Solemya elarraichensis and Acharax gadirae as well as Bathymodiolus sp. in the mud volcanoes of the Spanish Atlantic waters. Living populations of these species were thus far only found in Anastasya, Aveiro and Almazán mud volcanoes, together with other chemosymbiotic metazoa (Siboglinum spp.), suggesting the presence of moderate seepage activity. In other mud volcanoes (Albolote, Gazul), the benthic communities are dominated by sessile filter feeders on authigenic carbonates (chimneys, slabs) and only the shell remains of some chemosymbiotic bivalves were found, indicating earlier or very low seepage conditions. The present study elaborates on the known distribution of L. asapheus and S. elarraichensis to the European waters of the Gulf of Cádiz.

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Sea-floor features related to hydrocarbon seeps in deepwater carbonate-mud mounds of the Gulf of Cádiz: from mud flows to carbonate precipitates

Cited by 90 publications

References 29 publications

Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents

Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents

Growth and demise of cold-water coral ecosystems on mud volcanoes in the West Alboran Sea: The messages from the planktonic and benthic foraminifera

New records of recently described chemosymbiotic bivalves for mud volcanoes within the European waters (Gulf of Cádiz)

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