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  Massive asphalt deposits, oil seepage, and gas venting support abundant chemosynthetic communities at the Campeche Knolls, southern Gulf of Mexico

Sahling, H., Borowski, C., Escobar-Briones, E., Gaytán-Caballero, A., Hsu, C.-W., Loher, M., MacDonald, I., Marcon, Y., Pape, T., Römer, M., Rubin-Blum, M., Schubotz, F., Smrzka, D., Wegener, G., & Bohrmann, G. (2016). Massive asphalt deposits, oil seepage, and gas venting support abundant chemosynthetic communities at the Campeche Knolls, southern Gulf of Mexico. Biogeosciences, 13:, pp. 4491-4512.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0001-C29D-3 版のパーマリンク: https://hdl.handle.net/21.11116/0000-0005-4F9E-2
資料種別: 学術論文

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Borowski_2016.pdf (出版社版), 16MB
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https://hdl.handle.net/21.11116/0000-0005-4F9F-1
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Borowski_2016.pdf
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 作成者:
Sahling, Heiko, 著者
Borowski, Christian1, 著者           
Escobar-Briones, Elva, 著者
Gaytán-Caballero, Adriana, 著者
Hsu, Chieh-Wei, 著者
Loher, Markus, 著者
MacDonald, Ian, 著者
Marcon, Yann, 著者
Pape, Thomas, 著者
Römer, Miriam, 著者
Rubin-Blum, Maxim1, 著者           
Schubotz, Florence, 著者
Smrzka, Daniel, 著者
Wegener, Gunter2, 著者           
Bohrmann, Gerhard2, 著者           
所属:
1Department of Symbiosis, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481699              
2HGF MPG Joint Research Group for Deep Sea Ecology & Technology, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481702              

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 要旨: Hydrocarbon seepage is a widespread process at the continental margins of the Gulf of Mexico. We used a multidisciplinary approach, including multibeam mapping and visual seafloor observations with different underwater vehicles to study the extent and character of complex hydrocarbon seepage in the Bay of Campeche, southern Gulf of Mexico. Our observations showed that seafloor asphalt deposits previously only known from the Chapopote Knoll also occur at numerous other knolls and ridges in water depths from 1230 to 3150 m. In particular the deeper sites (Chapopopte and Mictlan knolls) were characterized by asphalt deposits accompanied by extrusion of liquid oil in form of whips or sheets, and in some places (Tsanyao Yang, Mictlan, and Chapopote knolls) by gas emission and the presence of gas hydrates in addition. Molecular and stable carbon isotopic compositions of gaseous hydrocarbons suggest their primarily thermogenic origin. Relatively fresh asphalt structures were settled by chemosynthetic communities including bacterial mats and vestimentiferan tube worms, whereas older flows appeared largely inert and devoid of corals and anemones at the deep sites. The gas hydrates at Tsanyao Yang and Mictlan Knolls were covered by a 5-to-10 cm-thick reaction zone composed of authigenic carbonates, detritus, and microbial mats, and were densely colonized by 1–2 m-long tube worms, bivalves, snails, and shrimps. This study increased knowledge on the occurrences and dimensions of asphalt fields and associated gas hydrates at the Campeche Knolls. The extent of all discovered seepage structure areas indicates that emission of complex hydrocarbons is a widespread, thus important feature of the southern Gulf of Mexico.

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言語: eng - English
 日付: 2016-08-11
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: 査読あり(内部)
 識別子(DOI, ISBNなど): eDoc: 733569
 学位: -

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出版物 1

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出版物名: Biogeosciences
  その他 : Biogeosciences
種別: 学術雑誌
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出版社, 出版地: Katlenburg-Lindau, Germany : Copernicus GmbH on behalf of the European Geosciences Union
ページ: - 巻号: 13 通巻号: 1 開始・終了ページ: 4491 - 4512 識別子(ISBN, ISSN, DOIなど): ISSN: 1726-4170
CoNE: https://pure.mpg.de/cone/journals/resource/111087929276006