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A honeycomb seafloor morphology in carbonate sediment of the Carnegie Ridge (offshore Ecuador): Formation and potential geodynamic significance

2018; Geological Society of America; Volume: 46; Issue: 11 Linguagem: Inglês

10.1130/g45285.1

1943-2682

François Michaud, Jean‐Yves Collot, Gueorgui Ratzov, Jean‐Noël Proust, Alexandre Dano, Jean‐Frédéric Lebrun, María José Hernández, Gerson Jonatan Donayre Loayza, Amal Khaoulani, Yolene Stoll, H.F.A. Pouderoux, L. De Min,

Paleontology and Stratigraphy of Fossils

Research Article| October 12, 2018 A honeycomb seafloor morphology in carbonate sediment of the Carnegie Ridge (offshore Ecuador): Formation and potential geodynamic significance F. Michaud; F. Michaud * 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France2Sorbonne Université, Faculté des Sciences et Ingénierie, F-75252 Paris, France *E-mail: micho@geoazur.unice.fr Search for other works by this author on: GSW Google Scholar J.Y. Collot; J.Y. Collot 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar G. Ratzov; G. Ratzov 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar J.N. Proust; J.N. Proust 3Univ. Rennes, CNRS, UMR6118 (Geosciences), F-35000 Rennes, France Search for other works by this author on: GSW Google Scholar A. Dano; A. Dano 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar J.F. Lebrun; J.F. Lebrun 4Université des Antilles et de la Guyane, Département de Géologie, Pointe à Pitre 97157, France Search for other works by this author on: GSW Google Scholar M.J. Hernández; M.J. Hernández 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France5Sorbonne Université, Institut des Sciences de la Terre de Paris (ISTeP), Campus Pierre et Marie Curie, 75252 Paris, France6Departamento de Geología, Escuela Politécnica Nacional, Quito, Ecuador Search for other works by this author on: GSW Google Scholar G. Loayza; G. Loayza 7Escuela Superior Politécnica del Litoral, Guayaquil, Ecuador Search for other works by this author on: GSW Google Scholar A. Khaoulani; A. Khaoulani 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar Y. Stoll; Y. Stoll 1Université Côte d'Azur, IRD (Institut de Recherche pour le Développement), Sorbonne Université, (CNRS) Centre National de la Recherche Scientifique, Observatoire de la Côte d'Azur, GEOAZUR (laboratoire de Géoazur), 06560 Valbonne, France Search for other works by this author on: GSW Google Scholar H. Pouderoux; H. Pouderoux 3Univ. Rennes, CNRS, UMR6118 (Geosciences), F-35000 Rennes, France Search for other works by this author on: GSW Google Scholar L. De Min L. De Min 4Université des Antilles et de la Guyane, Département de Géologie, Pointe à Pitre 97157, France Search for other works by this author on: GSW Google Scholar Geology (2018) 46 (11): 979–982. https://doi.org/10.1130/G45285.1 Article history received: 18 Jun 2018 rev-recd: 14 Sep 2018 accepted: 25 Sep 2018 first online: 12 Oct 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation F. Michaud, J.Y. Collot, G. Ratzov, J.N. Proust, A. Dano, J.F. Lebrun, M.J. Hernández, G. Loayza, A. Khaoulani, Y. Stoll, H. Pouderoux, L. De Min; A honeycomb seafloor morphology in carbonate sediment of the Carnegie Ridge (offshore Ecuador): Formation and potential geodynamic significance. Geology 2018;; 46 (11): 979–982. doi: https://doi.org/10.1130/G45285.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyGeology Search Advanced Search Abstract Based on swath bathymetry, two-dimensional, high-resolution seismic reflection profiles, and Ocean Drilling Program/Deep Sea Drilling Project (ODP/DSDP) data, we describe a seafloor honeycomb pattern and propose a model for its formation in Pliocene–Miocene carbonate deposited on the uneven oceanic basement of the Carnegie Ridge (offshore Ecuador). Hydrothermal fluids derived from the basement aquifer fractured and dissolved carbonate sediment, creating seafloor pits above basements highs. Fluids expelled along polygonal faults may have assisted the nucleation of seafloor depressions. At the Pliocene-Pleistocene boundary, strong bottom currents scoured previously damaged sediments, enlarging the initial depressions and producing the seafloor honeycomb pattern. This regional erosive episode was contemporaneous with the final closing of the Isthmus of Panama and the clogging of the Ecuador Trench by the subduction of the Carnegie Ridge, so that the honeycomb pattern may be viewed as a regional marker of these two geodynamic events. You do not currently have access to this article.