Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites

18 pages, 10 figures, 4 tables.-- Available online Dec 6, 2008.-- Issue title: "EUROMARGINS: Imaging, monitoring, and modelling the physical, chemical and biological processes in the European passive continental margins".

Detalles Bibliográficos
Autores: González Sanz, Francisco Javier, Somoza, Luis, Lunar, Rosario, Martínez-Frías, J., Martín Rubí, J. A., Torres, Trinidad, Ortiz, José E., Díaz del Río, Víctor, Pinheiro, L. M., Magalhães, Vitor Hugo
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/13453
Acceso en línea:http://hdl.handle.net/10261/13453
Access Level:acceso abierto
Palabra clave:Biomineralization processes
Birnessite
Fe–Mn nodules
Goethite
Gulf of Cadiz
Hydrocarbon seeps
Rhodochrosite
Siderite
id ES_b7d75cfb6b4ede40a8ecc49701ee2eac
oai_identifier_str oai:digital.csic.es:10261/13453
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
title Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
spellingShingle Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
González Sanz, Francisco Javier
Biomineralization processes
Birnessite
Fe–Mn nodules
Goethite
Gulf of Cadiz
Hydrocarbon seeps
Rhodochrosite
Siderite
title_short Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
title_full Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
title_fullStr Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
title_full_unstemmed Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
title_sort Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sites
dc.creator.none.fl_str_mv González Sanz, Francisco Javier
Somoza, Luis
Lunar, Rosario
Martínez-Frías, J.
Martín Rubí, J. A.
Torres, Trinidad
Ortiz, José E.
Díaz del Río, Víctor
Pinheiro, L. M.
Magalhães, Vitor Hugo
author González Sanz, Francisco Javier
author_facet González Sanz, Francisco Javier
Somoza, Luis
Lunar, Rosario
Martínez-Frías, J.
Martín Rubí, J. A.
Torres, Trinidad
Ortiz, José E.
Díaz del Río, Víctor
Pinheiro, L. M.
Magalhães, Vitor Hugo
author_role author
author2 Somoza, Luis
Lunar, Rosario
Martínez-Frías, J.
Martín Rubí, J. A.
Torres, Trinidad
Ortiz, José E.
Díaz del Río, Víctor
Pinheiro, L. M.
Magalhães, Vitor Hugo
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Biomineralization processes
Birnessite
Fe–Mn nodules
Goethite
Gulf of Cadiz
Hydrocarbon seeps
Rhodochrosite
Siderite
topic Biomineralization processes
Birnessite
Fe–Mn nodules
Goethite
Gulf of Cadiz
Hydrocarbon seeps
Rhodochrosite
Siderite
description 18 pages, 10 figures, 4 tables.-- Available online Dec 6, 2008.-- Issue title: "EUROMARGINS: Imaging, monitoring, and modelling the physical, chemical and biological processes in the European passive continental margins".
publishDate 2009
dc.date.none.fl_str_mv 2009
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/13453
url http://hdl.handle.net/10261/13453
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.margeo.2008.11.005
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 25427 bytes
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Hydrocarbon-derived ferromanganese nodules in carbonate-mud mounds from the Gulf of Cadiz: Mud-breccia sediments and clasts as nucleation sitesGonzález Sanz, Francisco JavierSomoza, LuisLunar, RosarioMartínez-Frías, J.Martín Rubí, J. A.Torres, TrinidadOrtiz, José E.Díaz del Río, VíctorPinheiro, L. M.Magalhães, Vitor HugoBiomineralization processesBirnessiteFe–Mn nodulesGoethiteGulf of CadizHydrocarbon seepsRhodochrositeSiderite18 pages, 10 figures, 4 tables.-- Available online Dec 6, 2008.-- Issue title: "EUROMARGINS: Imaging, monitoring, and modelling the physical, chemical and biological processes in the European passive continental margins".More than 500 Fe–Mn nodules were sampled during the Anastasya-01 cruise (TASYO project) along the continental margin of the Gulf of Cadiz (eastern Central Atlantic), at the confluence of the Mediterranean Sea with the Atlantic Ocean, where extensive nodule fields were discovered. Based on wide previous studies that included swath bathymetry, multi-channel and very high-resolution seismic reflection, gravimetry, magnetism and underwater photography surveys, nodules were collected at water depths ranging from 850 to 1000 m, associated with hydrocarbon-derived ankerite and dolomite chimneys and crusts. Thirty six selected samples among the various morphological types were used for the laboratory analysis of physical properties (morphology, colour, surface texture, sphericity, weight and size), mineralogy (XRD, optical and electronic microscopy) and geochemistry (XRF, AAS, ICP-MS, EPMA, GC-MS, S, C and O isotopes). Nodules show a wide range of sizes, densities, weights and morphologies. Nodules are formed of multiple millimetre-thick layers of Fe and Mn oxyhydroxides surrounding the nucleus composed of Early–Middle Miocene plastic marl. The textures developed by the Fe and Mn oxyhydroxides layers are massive, laminated, detrital and mottled to dendritic. Goethite, lepidocrocite, Mn-oxides (7 Å-manganates and 10 Å-manganates), quartz, and phyllosilicates are the main components. Accessory minerals are calcite, dolomite, siderite, rhodochrosite, kutnohorite, pyrite, chalcopyrite, potassium feldspar, zircon, rutile, ilmenite, and chlorite. Fe–Mn carbonates from the siderite–rhodochrosite continuous series are forming part of the marl nuclei. Framboidal, filamentous, and globular textures are observed in Fe–Mn oxides and pyrite suggesting biogenic origin. Nodules show a high mean abundance of Fe (38.6%) moderate Mn (6.0%), and low contents of trace metals and REEs compared to the average content of deep-seabed polymetallic nodules from other oceanic areas. The Mn/Fe ratio ranges from 0.07 to 0.25. The studied nodules hold in their oxide layers hydrocarbons (n-alkanes) derived from marine bacterial activity. Aromatic hydrocarbons in the form of phenanthrene, are also present which is characteristic of mature petroleum. The structure, mineralogy, and chemical composition in the studied nodules are similar to those of diagenetic–hydrogenetic continental margin nodules rather than deep-sea nodules. We suggest that the formation of this type of nodule occurred through a combined diagenetic–hydrogenetic growth process involving fluid venting from deep-seated hydrocarbon reservoirs, bio-mineralization processes, and bottom current erosion.This work has been funded thanks to a research fellowship of the Geological Survey of Spain within the framework of the European Science Foundation EuroCORE-EuroMARGINS projects: “MOUNDFORCE” (O1-LEC-EMA06F, REN-2002-11668-E-MAR) and “MVSEIS” (O1-LECEMA24F, REN-2002-11669-E-MAR).Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]200920092009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_650125427 bytesapplication/pdfhttp://hdl.handle.net/10261/13453reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.margeo.2008.11.005Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/134532026-05-22T06:33:51Z
score 15,81155

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