Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data

Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data

10 pages, 7 figures

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Bibliographic Details
Main Authors: Petersen, Carl Jörg, Klaucke, Ingo, Weinrebe, Wilhelm, Ranero, César R.
Format: artículo biblioteca
Language:English
Published: Elsevier 2009-10
Subjects:Fluid seepage, Deep-towed side-scan sonar, Sub-bottom profiler, Carbonate, Mound, Mud diapir,
Online Access:http://hdl.handle.net/10261/83909
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spelling dig-icm-es-10261-839092020-12-09T16:01:43Z Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data Petersen, Carl Jörg Klaucke, Ingo Weinrebe, Wilhelm Ranero, César R. Fluid seepage Deep-towed side-scan sonar Sub-bottom profiler Carbonate Mound Mud diapir 10 pages, 7 figures Our analysis of geoacoustic data from the Middle American margin provides an insight into the formation and evolution mechanisms of mound structures observed on the continental slope offshore Costa Rica. Based on high-resolution deep-towed sidescan sonar and sub-bottom profiler (SBP) data six different mound and fluid seepage structures at the Hongo mound field are characterized in detail. The Hongo mound field is located on the lower continental slope offshore Nicoya peninsula in the prolongation of the subducting Nicoya fracture zone. The mounds have oval to circular shapes with diameters of 500-1600 m and relief heights of 60-100 m. High backscatter anomalies near the mound summits indicate carbonate precipitation and focused fluid seepage activity within the last 10 ka. The data do not show evidence for mud extrusions and the structures were probably formed by a combination of carbonate precipitation and mud diapirism. Based on seismic stratigraphy analysis, mud diapirism is at least active since 42.5-57 ka and average vertical growth rates vary between 6-24 cm/ka. However, if diapirism represents the dominant mound evolution mechanism, mound heights of 80 m point to much older mound ages of 330-1330 ka. © 2009 Elsevier B.V. All rights reserved Funding for the cruise and subsequent work has been provided by the German Ministry of Education and Research (BMBF) and the German Research Foundation (DFG). This publication is contribution 179 of the Sonderforschungsbereich 574 “Volatiles and fluids in subduction zones” at Kiel University Peer Reviewed 2013-10-11T09:01:32Z 2013-10-11T09:01:32Z 2009-10 2013-10-11T09:01:32Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.margeo.2009.08.004 issn: 0025-3227 Marine Geology 266(1-4): 172-181 (2009) http://hdl.handle.net/10261/83909 10.1016/j.margeo.2009.08.004 en https://doi.org/10.1016/j.margeo.2009.08.004 none Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Fluid seepage
Deep-towed side-scan sonar
Sub-bottom profiler
Carbonate
Mound
Mud diapir
Fluid seepage
Deep-towed side-scan sonar
Sub-bottom profiler
Carbonate
Mound
Mud diapir
spellingShingle Fluid seepage
Deep-towed side-scan sonar
Sub-bottom profiler
Carbonate
Mound
Mud diapir
Fluid seepage
Deep-towed side-scan sonar
Sub-bottom profiler
Carbonate
Mound
Mud diapir
Petersen, Carl Jörg
Klaucke, Ingo
Weinrebe, Wilhelm
Ranero, César R.
Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
description 10 pages, 7 figures
format artículo
topic_facet Fluid seepage
Deep-towed side-scan sonar
Sub-bottom profiler
Carbonate
Mound
Mud diapir
author Petersen, Carl Jörg
Klaucke, Ingo
Weinrebe, Wilhelm
Ranero, César R.
author_facet Petersen, Carl Jörg
Klaucke, Ingo
Weinrebe, Wilhelm
Ranero, César R.
author_sort Petersen, Carl Jörg
title Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
title_short Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
title_full Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
title_fullStr Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
title_full_unstemmed Fluid seepage and mound formation offshore Costa Rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
title_sort fluid seepage and mound formation offshore costa rica revealed by deep-towed sidescan sonar and sub-bottom profiler data
publisher Elsevier
publishDate 2009-10
url http://hdl.handle.net/10261/83909
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AT klauckeingo fluidseepageandmoundformationoffshorecostaricarevealedbydeeptowedsidescansonarandsubbottomprofilerdata
AT weinrebewilhelm fluidseepageandmoundformationoffshorecostaricarevealedbydeeptowedsidescansonarandsubbottomprofilerdata
AT ranerocesarr fluidseepageandmoundformationoffshorecostaricarevealedbydeeptowedsidescansonarandsubbottomprofilerdata
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