Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)

Memòria de tesi doctoral presentada per Elena Piñero Melgar per a optar al grau de Doctora per la Universitat de Barcelona (UB) dins del programa en Ciències de la Terra del bienni 2003-2005, realizada sota la direcció de la Dra. Eulàlia Gràcia i Mont de la Unitat de Tecnologia Marina (UTM-CSIC) y d...

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Detalles Bibliográficos
Autor: Piñero, Elena
Tipo de recurso: tesis doctoral
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:10261/101076
Acceso en línea:http://hdl.handle.net/10261/101076
Access Level:acceso abierto
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network_name_str España
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dc.title.none.fl_str_mv Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
Sedimentologia i Geoquímica de Sediments rics en Hidrats de Gas del Marge d’Oregon (Ocean Drilling Program Leg 204)
title Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
spellingShingle Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
Piñero, Elena
title_short Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
title_full Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
title_fullStr Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
title_full_unstemmed Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
title_sort Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)
dc.creator.none.fl_str_mv Piñero, Elena
author Piñero, Elena
author_facet Piñero, Elena
author_role author
dc.contributor.none.fl_str_mv Gràcia, Eulàlia
Martínez-Ruiz, Francisca
description Memòria de tesi doctoral presentada per Elena Piñero Melgar per a optar al grau de Doctora per la Universitat de Barcelona (UB) dins del programa en Ciències de la Terra del bienni 2003-2005, realizada sota la direcció de la Dra. Eulàlia Gràcia i Mont de la Unitat de Tecnologia Marina (UTM-CSIC) y de la Dra. Francisca Martínez-Ruiz del Insituto Andaluz de Ciencias de la Tierra (IACT-CSIC)
publishDate 2009
dc.date.none.fl_str_mv 2009
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
http://purl.org/coar/resource_type/c_db06
format doctoralThesis
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/101076
url http://hdl.handle.net/10261/101076
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidad de Barcelona
CSIC - Instituto Andaluz de Ciencias de la Tierra (IACT)
CSIC - Unidad de Tecnología Marina (UTM)
publisher.none.fl_str_mv Universidad de Barcelona
CSIC - Instituto Andaluz de Ciencias de la Tierra (IACT)
CSIC - Unidad de Tecnología Marina (UTM)
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
_version_ 1869412414819139584
spelling Sedimentology and Geochemistry of Gas Hydrate-rich sediments from the Oregon Margin (Ocean Drilling Program Leg 204)Sedimentologia i Geoquímica de Sediments rics en Hidrats de Gas del Marge d’Oregon (Ocean Drilling Program Leg 204)Piñero, ElenaMemòria de tesi doctoral presentada per Elena Piñero Melgar per a optar al grau de Doctora per la Universitat de Barcelona (UB) dins del programa en Ciències de la Terra del bienni 2003-2005, realizada sota la direcció de la Dra. Eulàlia Gràcia i Mont de la Unitat de Tecnologia Marina (UTM-CSIC) y de la Dra. Francisca Martínez-Ruiz del Insituto Andaluz de Ciencias de la Tierra (IACT-CSIC)Gas hydrates have been recently recognized as a key factor affecting a number of global processes such as the climatic change, sea floor stability, etc. In this thesis we present the multidisciplinary study of gas hydrate rich sediments recovered during ODP Leg 204 “Drilling gas hydrates at Hydrate Ridge”. The main objective of this thesis is to study how the textural characteristics of marine sediments can affect the main pathways and intensity of fluid flow and how fluid flow determines the distribution of gas hydrates in the continental margins, as well as the main geochemical processes that occur during early diagenesis. To reach these objectives, a complete sedimentary and geochemical study of 581 sediment samples from southern Hydrate Ridge was carried out. The methods and techniques that were applied include: complete textural analyses (grain size, granulometric distribution curve, statistical parameters, identification of the coarse-grained particles, carbonate content…), mineralogy (bulk sediment and clay minerals), physical properties (magnetic susceptibility) and geochemistry (major and trace elementary composition, total organic carbon). The southern Hydrate Ridge sediments are mainly made up of four lithofacies defined as: hemipelagites, turbidites, ash layers and debrites. Mass-transport deposits such as turbidites and debrites are more abundant in Lithostratigraphic Unit III and II, as well as in Lithostratigraphic Unit IA in the slope basin of southern Hydrate Ridge. Some increasing trends with depth can be observed in the smectite content in the clay mineral assemblages of southern Hydrate Ridge sediments. These features suggests that the transport in suspension of fine sediments through the California Current was more effective during the Pliocene and early Pleistocene period. Bedload transport of coarse material from local and distal areas was more effective during the middle Pleistocene and Holocene due to the tectonic reactivation of the southern Hydrate Ridge uplift. During the Pleistocene and owing to the pervasive fluctuation of sea-level, gas hydrate dissociation together with the seismic movements in the Oregon margin seems a plausible triggering mechanism for mass-movements. Thus, the results presented here confirm that the sedimentation patterns in the Hydrate Ridge region are controlled by climate and tectonic parameters such as the regional intensity of the California Current or the local tectonic movements that lead to the uplift of the Ridge. These parameters mainly control the clay mineral distribution as well as the sedimentary facies that are produced [...]The samples analysed in this study were provided by the Ocean Drilling Program (ODP) that is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of the Joint Oceanographic Institutions, Inc. in which Spain is included as part of the European Consortium for Ocean Research Drilling (ECORD). This work was supported by the Spanish Ministry of Science and Innovation (Ministerio de Ciencia e Innovación) through Acciones Especiales REN 2001-5262-E and BTE 2002-11698-E especially devoted to the Spanish participation (pre-cruise and post-cruise) in the ODP Leg 204. Funding was also complemented by National Projects IMPULS (REN 2003-05996-MAR), EVENT (CGL2006-12861-C02-02), MARCAL (CGL2006-13327-C04-04 CLI), MARM (200800050084447) and European Science Foundation EuroMargins SWIM Project (REN2002-11234-E-MAR). The Acción Complementaria SUMATRA (CTM2006-27159-E) allowed the participation of Elena Piñero in a coring cruise, in which a protocol similar to ODP was applied. Elena Piñero benefited of the MEC FPU Ph.D. fellowship 2003-2872 from year 2004 to 2008Peer ReviewedUniversidad de BarcelonaCSIC - Instituto Andaluz de Ciencias de la Tierra (IACT)CSIC - Unidad de Tecnología Marina (UTM)Gràcia, EulàliaMartínez-Ruiz, Francisca20092014info:eu-repo/semantics/doctoralThesishttp://purl.org/coar/resource_type/c_db06http://hdl.handle.net/10261/101076reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1010762026-05-22T06:33:51Z
score 15,81155

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