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dc.contributor.authorPaz, Maximiliano-
dc.contributor.authorBuatois, Luis-
dc.contributor.authorMángano, Gabriela-
dc.contributor.authorDesjardins, Patricio-
dc.contributor.authorNotta, Raul-
dc.contributor.authorGonzalez Tomassini, Federico-
dc.contributor.authorCarmona, Noelia Beatriz-
dc.contributor.authorMinisini, Daniel-
dc.date.accessioned2022-09-08T13:41:22Z-
dc.date.available2022-09-08T13:41:22Z-
dc.date.issued2022-
dc.identifier.citationPaz et al., (2022) Organic-rich, fine-grained contourites in an epicontinental basin: The Upper Jurassic-Lower Cretaceous Vaca Muerta Formation, Argentina. Marine and Petroleum Geology; 142; 105757.es_ES
dc.identifier.issn0264-8172es_ES
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S0264817222002355?via%3Dihubes_ES
dc.identifier.urihttp://rid.unrn.edu.ar/handle/20.500.12049/9063-
dc.description.abstractOver the last few years, recognition and characterization of sedimentary processes in fine-grained successions is receiving considerable attention in part due to the increased importance of unconventional reservoirs. Recent sedimentologic analyses of these successions have revealed abundant traction transport structures that suggest bottom current activity of different origins. The present study constitutes a detailed sedimentologic analysis of the Upper Jurassic-Lower Cretaceous Vaca Muerta Formation (Neuqu´en Basin, Argentina), which comprises organic-rich, fine-grained subaqueous clinoform deposits. Locally, intervals showing traction structures such as parallel lamination, ripple cross-lamination and cross-bedding, and displaying high bioturbation, occur. These intervals can be differentiated into three facies associations, namely crinoidal mixed to calcareous mudstone, mixed to calcareous mudstone, and calcareous to mixed mudstone interbedded with calcareous mudstone. These facies associations were deposited by contour currents showing semi-permanent activity, low sediment concentration, and generating long-term oxygen supply to the seafloor. Locally, some successions display an increasing to decreasing bioturbation intensity pattern that may have a similar origin to the bi-gradational sequence of contourites. The present sedimentologic analysis supports the idea that contour currents are associated with high bioturbation levels due to increased oxygenation, which controls the degree of preservation of traction structures, and consequently the possibility to delineate these processes in fine-grained successions. These currents occurred in relatively shallow water, probably as part of a weakened estuarine or anti-estuarine, basin-wide circulation system intensified by the enhanced action of dense water cascading during arid and cool climate periods.es_ES
dc.format.extentp. 105757es_ES
dc.language.isoenes_ES
dc.publisherElSevieres_ES
dc.relation.urihttps://www.elsevier.com/locate/marpetgeoes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/-
dc.titleOrganic-rich, fine-grained contourites in an epicontinental basin: The Upper Jurassic-Lower Cretaceous Vaca Muerta Formation, Argentinaes_ES
dc.typeArticuloes_ES
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-ND 4.0)-
dc.description.filiationBuatois, Luis. Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canadaes_ES
dc.description.filiationMángano, Gabriela. Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada,es_ES
dc.description.filiationCarmona, Noelia Beatriz. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro; Agentina.es_ES
dc.description.filiationPaz, Maximiliano. Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canadaes_ES
dc.description.filiationDesjardins, Patricio. Shell Exploration and Production Company, 150N Dairy Ashford St, TX, 77019, Houston, USAes_ES
dc.description.filiationNotta, Raul. Shell Exploration and Production Company, 150N Dairy Ashford St, TX, 77019, Houston, USAes_ES
dc.description.filiationGonzalez, Tomassini, Federico. Phoenix Global Resources, Alem 855, C1001AAQ, Buenos Aires, Argentinaes_ES
dc.description.filiationMinisini, Daniel. Shell Technology Center Houston, 3333 South HW 6, TX, 77082, Houston, USAes_ES
dc.subject.keywordVaca Muertaes_ES
dc.subject.keywordOrganic Riches_ES
dc.subject.keywordNeuquénes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.subject.materiaCiencias Ambientales y de la Tierraes_ES
dc.origin.lugarDesarrolloUniversidad Nacional de Río Negroes_ES
dc.relation.journalissue142es_ES
dc.description.reviewtruees_ES
dc.description.resumenOver the last few years, recognition and characterization of sedimentary processes in fine-grained successions is receiving considerable attention in part due to the increased importance of unconventional reservoirs. Recent sedimentologic analyses of these successions have revealed abundant traction transport structures that suggest bottom current activity of different origins. The present study constitutes a detailed sedimentologic analysis of the Upper Jurassic-Lower Cretaceous Vaca Muerta Formation (Neuqu´en Basin, Argentina), which comprises organic-rich, fine-grained subaqueous clinoform deposits. Locally, intervals showing traction structures such as parallel lamination, ripple cross-lamination and cross-bedding, and displaying high bioturbation, occur. These intervals can be differentiated into three facies associations, namely crinoidal mixed to calcareous mudstone, mixed to calcareous mudstone, and calcareous to mixed mudstone interbedded with calcareous mudstone. These facies associations were deposited by contour currents showing semi-permanent activity, low sediment concentration, and generating long-term oxygen supply to the seafloor. Locally, some successions display an increasing to decreasing bioturbation intensity pattern that may have a similar origin to the bi-gradational sequence of contourites. The present sedimentologic analysis supports the idea that contour currents are associated with high bioturbation levels due to increased oxygenation, which controls the degree of preservation of traction structures, and consequently the possibility to delineate these processes in fine-grained successions. These currents occurred in relatively shallow water, probably as part of a weakened estuarine or anti-estuarine, basin-wide circulation system intensified by the enhanced action of dense water cascading during arid and cool climate periods.es_ES
dc.identifier.doihttps://doi.org/10.1016/j.marpetgeo.2022.105757-
dc.relation.journalTitleMarine and Petroleum Geologyes_ES
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