Methane-Related Carbonate Cementation of Marine Sediments and Related Macroalgal Coralligenous Assemblages in the Northern Adriatic Sea

Gordini, Emiliano; Falace, Annalisa; Donda, Federica; Marocco, Ruggero; Tunis, Giorgio

doi:10.1016/b978-0-12-385140-6.00009-8

Cited by 20 publications

(30 citation statements)

References 25 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Presence, migration and occasional escape of gas onto the Adriatic sea bottom and into the water column is documented by a number of features such as pockmarks and gas bubbling (Hovland and Curzi, 1989;Conti et al, 2002;Casellato and Stefanon, 2008;Capozzi et al, 2012;Gordini et al, 2012). Hydrocarbon seepage on the middle Adriatic continental shelf also resulted in the local formation of authigenic carbonates with large 13 C depletion, as those occurring in the Bonaccia area located about 70 km offshore the Ancona promontory ( Fig.…”

Section: Introductionmentioning

confidence: 94%

Biodetrital carbonates on the Adriatic continental shelf imprinted by oxidation of seeping hydrocarbons

Taviani

Franchi

Angeletti

et al. 2015

Marine and Petroleum Geology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 94%

Biodetrital carbonates on the Adriatic continental shelf imprinted by oxidation of seeping hydrocarbons

Taviani

Franchi

Angeletti

et al. 2015

Marine and Petroleum Geology

View full text Add to dashboard Cite

“…In some Mediterranean regions, information on coralligenous distribution is available in the literature but its reliability must be estimated (Leriche et al 2001). Acoustic technologies are increasingly being used for monitoring benthic habitats (Zapata-Ramirez et al 2013), and those used for mapping coralligenous communities normally include side-scan sonars and multibeam sonars (Bonacorsi et al 2012, Gordini et al 2012. Acoustic mapping using multibeam echo sounders allows us to infer seafloor topography, and therefore the geomorphologies on which coralligenous assemblages thrive, and the best locations for ground truthing.…”

Section: Introductionmentioning

confidence: 99%

Combining literature review, acoustic mapping and in situ observations: an overview of coralligenous assemblages in Liguria (NW Mediterranean Sea)

Molina¹,

Montefalcone²,

Vassallo³

et al. 2011

Sci. Mar.

View full text Add to dashboard Cite

Summary:A review and update of the existing knowledge on the coralligenous assemblages of Liguria (NW Italy) was conducted as an essential step towards management measures for their conservation according to the EU Marine Strategy Framework Directive. By combining a literature review, acoustic mapping and in situ observations on a geographic information systems platform, we were able to assess the distribution and heterogeneity of coralligenous assemblages and the main pressures affecting them. The reliability of the literature was previously estimated using a dependability index. The coralligenous assemblages cover an area of 130.9 ha and range from 10 to 113 m depth. Twelve different biological facies (five of them not included in the EUNIS list) were identified and four main geomorphotypes (plungingcliffs, paleocliffs, rockfalls and shoals) were recognized. Incident light values influenced the distribution of four facies in Portofino promontory. Pressures were found on 33% of the coralligenous assemblages investigated, mainly due to fishing activities, mass mortality events, invasive species and occasional mucilaginous events. Our results showed a high spatial, geomorphological and biological heterogeneity of coralligenous assemblages in Liguria.Keywords: mapping; literature review; heterogeneity; coralligenous assemblages; NW Mediterranean Sea.Combinando revisión bibliográfica, mapas acústicos y observaciones in situ: sinopsis de las formaciones coralígenas en Liguria (NO del mar Mediterráneo) Resumen: Una revisión y actualización del conocimiento existente sobre las formaciones coralígenas en Liguria (NO de Italia) ha sido implementado como paso esencial con vistas a las medidas de gestión para su conservación de acuerdo con la Directiva Marco sobre la Estrategia Marina. Combinando en plataforma SIG revisión bibliográfica, mapas acústicos y observaciones in situ hemos sido capaces de determinar la distribución de las formaciones coralígenas, su heterogeneidad y sus principales presiones. La fiabilidad de la bibliografía fue estimada a través del índice de confianza (DI). Las formaciones coralígenas cubren un área de 130.9 ha en un rango de profundidad que va desde los 10 m a los 113 m. 12 facies biológicas diferentes (5 de ellas no incluidas en la lista EUNIS) fueron identificadas y 4 geomorfotipos principales (acantilado actual, paleoacantilado, cúmulo de rocas y bajos) fueron reconocidos. Los valores de luz incidente influenciaron la distribución de 4 facies en el promontorio de Portofino. Fueron encontradas presiones en el 33% de las formaciones coralígenas investigadas, principalmente debidas a actividades de pesca, episodios de muerte masiva, especies invasoras y proliferación de algas mucilaginosas. Nuestros resultados mostraron una elevada heterogeneidad espacial, geomorfológica y biológica de las formaciones coralígenas en Liguria.

show abstract

“…The uppermost part of the succession consists of a set of horizontal, continuous reflectors, representing shallow‐marine to continental deposits controlled by late Quaternary glacio‐eustatic changes (see figs of Donda et al ., ; Massari et al ., ; Ghielmi et al ., ). On the seafloor, carbonate crusts and slabs, known as ‘Trezze’ (Gordini et al ., and references therein) and ‘Tegnue’ (Newton & Stefanon, ; Giovanardi et al ., ) are widespread in the study area and have been classified as methane‐derived carbonates (Stefanon, ; Conti et al ., ; Gordini et al ., , ).…”

Section: Geological Settingmentioning

confidence: 99%

“…In the Adriatic Sea, fluid‐related seabed and sub‐seabed features have been widely documented (Newton & Stefanon, ; Stefanon, ; Mazzotti et al ., ; Hovland & Curzi, ; Colantoni et al ., ; Conti et al ., ; Gordini et al ., , ; Trincardi et al ., ; Orange et al ., ; Panieri, ; Garcia‐Garcia et al ., ; Geletti et al ., ; Gordini, ). In particular, there are numerous reports since the 1970′s of the occurrence of gas seeps and scattered rock outcrops in the Northern Adriatic Sea.…”

Section: Introductionmentioning

confidence: 98%

“…In particular, there are numerous reports since the 1970′s of the occurrence of gas seeps and scattered rock outcrops in the Northern Adriatic Sea. However, only recently a relationship between carbonate rock seabed outcrops and methane venting has been established (Stefanon, ; Conti et al ., ; Panieri, ; Capozzi et al ., ; Gordini et al ., ), although the origin and the migration paths of the seeping gas were not clearly defined.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Deep‐sourced gas seepage and methane‐derived carbonates in the Northern Adriatic Sea

et al. 2014

Self Cite

View full text Add to dashboard Cite

In the Northern Adriatic Sea, the occurrence of gas seepage and of unique rock outcrops has been widely documented. The genesis of these deposits has recently been ascribed to gas venting, leading to their classification as methane-derived carbonates. However, the origin of seeping gas was not clearly constrained. Geophysical data collected in 2009 reveal that the gas-enriched fluid vents are deeply rooted. In fact, the entire Plio-Quaternary succession is characterized by widespread seismic anomalies represented by wipe-out zones, and interpreted as gas chimneys. They commonly root at the base of the Pliocene sequence but also within the Palaeogene succession, where they appear to be associated to deep-seated faults. We suggest that there is a structural control on chimney distribution. Chimneys originate and terminate at different stratigraphic levels; commonly they reach the seafloor, where authigenic carbonate deposits form locally. Gas analyses of some gas bubble streams just above the rock outcrops reveal that gas is composed mainly of methane. Geochemical analyses performed at four selected outcrop sites show that these deposits formed as a consequence of active gas venting. In particular, geochemical analyses indicate carbonate precipitation from microbial oxidation of methane-rich fluids, although a straightforward correlation with the source depth of gas feeding the authigenic carbonates cannot yet be clearly defined.

show abstract

Methane-Related Carbonate Cementation of Marine Sediments and Related Macroalgal Coralligenous Assemblages in the Northern Adriatic Sea

Cited by 20 publications

References 25 publications

Biodetrital carbonates on the Adriatic continental shelf imprinted by oxidation of seeping hydrocarbons

Biodetrital carbonates on the Adriatic continental shelf imprinted by oxidation of seeping hydrocarbons

Combining literature review, acoustic mapping and in situ observations: an overview of coralligenous assemblages in Liguria (NW Mediterranean Sea)

Deep‐sourced gas seepage and methane‐derived carbonates in the Northern Adriatic Sea

Contact Info

Product

Resources

About