High-resolution, deep tow, multichannel seismic and sidescan sonar survey of the submarine mounds and associated BSR off Nicaragua pacific margin

Talukder, Asrar; Bialas, J.; Klaeschen, Dirk; Buerk, D.; Brueckmann, W.; Reston, T. J.; Breitzke, Monika

doi:10.1016/j.margeo.2007.03.002

Cited by 33 publications

(31 citation statements)

References 40 publications

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“…Even at the cold vents of northern Cascadian margin, where should have active fluid flow, the BSRs and the BHSZs are consistent (inferred from the measured heat flow and BSR heat flow) (Riedel et al, 2006). However, some disagreements between BSRs and BHSZs (or, BSR heat flow and measured heat flow) also have been discovered (e.g., Talukder et al, 2007;Shyu et al, 2006;Lucazeau et al, 2004;Vanneste et al, 2003;Grevemeyer and Villinger, 2001;Kaul et al, 2000;Xu and Ruppel, 1999;Ruppel, 1997;Townend, 1997). Shyu et al (2006) found obvious difference between BSRs and BHSZs at Southwest Taiwan Basin.…”

Section: Introductionmentioning

confidence: 92%

Heat flow pattern, base of methane hydrates stability zones and BSRs in Shenhu Area, northern South China Sea

Zhang

Wang

et al. 2011

Acta Oceanol. Sin.

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Using the collected 433 heat flow values, we estimated the bases of methane hydrate stability zone (BHSZ), in northern South China Sea (NSCS). Through comparing BHSZs with the depths of bottom simulating reflectors (BSRs), in Shenhu Area (SA), we found that there are big differences between them. In the north of SA, where the water depth is shallow, many slumps developed and the sedimentation rate is high, it appears great negative difference (as large as -192%). However, to the southeast of SA, where the water depth is deeper, sedimentation rate is relatively low and uplift basement topography exists, it changes to positive difference (as large as +45%). The differences change so great, which haven't been observed in other places of the world. After considering the errors from the process of heat flow measurement, the BSR depth, the relationship of thermal conductivity with the sediments depth, and the fluid flow activities, we conclude that the difference should be not caused by these errors. Such big disagreement may be due to the misunderstanding of BSR. The deviant "BSRs" could represent the paleo-BSRs or just gas-bearing sediment layers, such as unconformities or the specific strata where have different permeability, which are not hydraterelated BSRs.

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Section: Introductionmentioning

confidence: 92%

Heat flow pattern, base of methane hydrates stability zones and BSRs in Shenhu Area, northern South China Sea

Zhang

Wang

et al. 2011

Acta Oceanol. Sin.

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“…On the other hand, in some cases they have been linked to both compressional and extensional settings, such as the Western Alboran Sea area (e.g., Pérez-Belzuz, Alonso & Ercilla, 1997;Sautkin et al, 2003). In addition to high overpressure in sedimentary layers due to rapid sedimentation and gas generation (e.g., Dimitrov, 2002;Talukder et al, 2007;Brown, 1990;Hovland, Hill & Stokes, 1997), tectonic processes are considered to be the main driving mechanism for the development of mud diapirism (e.g., Milkov, 2000;Talukder et al, 2007). In Colombia, mud diapirism has been reported in scarce studies (e.g., Duque-Caro, 1984;Briceño & Vernette, 1992;Ordoñez, 2008).…”

Section: Introductionmentioning

confidence: 99%

Relationship between the mud organic matter content and the maximum height of diapiric domes using analog models

González-Morales

Rodríguez-Madrid

Ríos-Reyes

et al. 2015

CT&F Cienc. Tecnol. Futuro

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Mud diapirs are sedimentary structures produced by mud intrusion through a host rock. In this study, analog models of mud diapirism showed that gas generated from decomposition of organic matter contained in diapiric mud plays a fundamental role in the generation of these structures. This study is aimed to test the hypothesis that a relationship exists between the mud organic matter content (TOC) and the maximum height of diapiric domes. Our experiments were performed using sand boxes 20 x 20 x 16 cm in size, using nine mud combinations with TOC values that ranged between 1.6 and 4.3%, repeated 5 times to minimize random errors. Results of this study confirm that a linear relationship of the maximum height (mm) = 12.7xTOC (%) -18.16 explains the elevations measured. In addition, an inverse linear relationship between TOC and the time at which the domes reached hmax was established. Observation of the morphological changes undergone by domes during their evolution allowed recognition of evolutionary stages that can be compared to the geomorphology of mud domes in nature. The relationships established in this study are useful to generate hypothesis about the organic matter content under active mud diapiric areas. For example, the elevations in the south of Colombia's Sinú diapiric Belt (Abibe-Las Palomas Anticlinorium) are, on average, clearly higher than those in the northern part of this belt (Turbaco Anticlinorium). This may be the result of a much more organic-rich mud source under the southern Anticlinorium relative to the north. Finally, a warning is made on the risks of constructions above areas where mud diapirism occurs, which can be affected by the collapse of diapiric domes. ABSTRACTHow to cite: González-Morales, O., Rodríguez-Madrid, A. L., Ríos-Reyes, C. A. & Ojeda-Bueno, G. Y. (2015). Relationship between the mud organic matter content and the maximum height of diapiric domes using analog models. CT&F -Ciencia, Tecnología y Futuro, 6(2),17-32. RELACIÓN ENTRE EL CONTENIDO DE MATERIA ORGÁNICA DE LODO Y LA ALTURA MÁXIMA DE LOS DOMOS DIAPIRICOS USANDO MODELOS ANÁLOGOS RELAÇÃO ENTRE O CONTEÚDO DE MATÉRIA ORGÂNICA DE LODO E A ALTURA MÁXIMA DOS DOMOS DIAPÍRICOS USANDO MODELOS ANÁLOGOS 18O s diápiros de lodo são estruturas sedimentárias produzidas pela intrusão de lodo através de uma roca hospedeira. Neste estudo, os modelos análogos de diapirismo de lodo mostraram que o gás gerado a partir da decomposição da matéria orgânica contida no lodo diapírico tem um papel fundamental na geração destas estruturas. O objetivo deste estudo foi provar a hipótese da existência de uma relação entre o conteúdo de matéria orgânica (TOC) do lodo e a altura máxima dos domos diapíricos. Nossos experimentos foram realizados em caixas de areia de 20 x 20 x 16 cm de tamanho, utilizando nove combinações de lodo com os valores TOC de 1.6 -4.3 %, com 5 repetições para minimizar os erros aleatórios. Os resultados deste estudo confirmam que uma relação lineal da altura máxima (mm) = 12.7xTOC (%) -18.16 explica as elevações medidas. A...

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“…Therefore, to understand the tectonic development of convergent margins, it is very important to understand the fluid regime and the dewatering mechanisms as well as gas hydrate formation or dissociation processes operating in the margins. Successive geophysical and geological surveys on the Costa Rica and Nicaragua margin have identified numerous submarine landslides, a large number of mound-shaped structures and extensive BSRs along the middle upper slope of much of the margin (Pecher et al 1998;Bohrmann et al 2002;Talukder et al 2007). In general, the descriptive term 'mound' is used, because it is difficult to clearly categorize these structures as mud volcanoes, mud diapirs or any other type of mud extrusion or fluid escape features Talukder et al 2007).…”

mentioning

confidence: 99%

“…Successive geophysical and geological surveys on the Costa Rica and Nicaragua margin have identified numerous submarine landslides, a large number of mound-shaped structures and extensive BSRs along the middle upper slope of much of the margin (Pecher et al 1998;Bohrmann et al 2002;Talukder et al 2007). In general, the descriptive term 'mound' is used, because it is difficult to clearly categorize these structures as mud volcanoes, mud diapirs or any other type of mud extrusion or fluid escape features Talukder et al 2007). Talukder et al (2007) suggested that in the Nicaragua margin the triggering and distribution of mud mounds and associated BSRs are controlled by faults.…”

mentioning

confidence: 99%

“…In general, the descriptive term 'mound' is used, because it is difficult to clearly categorize these structures as mud volcanoes, mud diapirs or any other type of mud extrusion or fluid escape features Talukder et al 2007). Talukder et al (2007) suggested that in the Nicaragua margin the triggering and distribution of mud mounds and associated BSRs are controlled by faults. This study tries to establish the tectonic framework of these faults producing venting features and their relationship with the submarine landslides as well as the subducted seamounts in the part of the Nicaragua margin dominated by slides (Fig.…”

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confidence: 99%

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Tectonic framework of the mud mounds, associated BSRs and submarine landslides, offshore Nicaragua Pacific margin

Talukder

Bialas

Klaeschen

et al. 2008

JGS

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The regional distribution of mounds, associated bottom-simulating reflectors (BSRs) and submarine landslides of the Pacific margin of Nicaragua suggests a genetic relationship between them. In the landslidedominated parts of the margin, mud mounds occur in groups upslope behind the scarps and aligned parallel to the headwall. The morphotectonic features associated with the slides suggest that the slope failure could be triggered by slope oversteepening on the trailing flank of subducted seamounts. Geometric analysis of the faults triggering and controlling the mud mounds and associated BSRs also indicates that they were caused by collapses of the uplifted sea floor. Thus we propose a simple conceptual genetic model for the occurrences of the submarine landslides, surrounding mud mounds and associated BSRs in the area. Seamount subduction created locally higher fluid overpressure in the décollement. The uplift and fracturing of the margin wedge above the subducting seamount opened pathways for the overpressured fluid to escape, leading to the formation of numerous mud mounds on the sea floor and the BSR in the subsurface. The higher fluid supply locally reduced the shear strength of the sediments and facilitated failure of these sediments as landslides on the oversteepened slope caused by the subduction of the seamount.

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High-resolution, deep tow, multichannel seismic and sidescan sonar survey of the submarine mounds and associated BSR off Nicaragua pacific margin

Cited by 33 publications

References 40 publications

Heat flow pattern, base of methane hydrates stability zones and BSRs in Shenhu Area, northern South China Sea

Heat flow pattern, base of methane hydrates stability zones and BSRs in Shenhu Area, northern South China Sea

Relationship between the mud organic matter content and the maximum height of diapiric domes using analog models

Tectonic framework of the mud mounds, associated BSRs and submarine landslides, offshore Nicaragua Pacific margin

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