Distinct activity phases during the recent geologic history of a Gulf of Mexico mud volcano

MacDonald, Ian R.; Peccini, Michael B.

doi:10.1016/j.marpetgeo.2008.12.005

Cited by 17 publications

(5 citation statements)

References 44 publications

(57 reference statements)

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“…A terrestrial mud diatreme develops through the upward migration and eruption of subsurface mobilized sediments that are more highly pressurized and more fluid-rich than the sediments that form other more mound-like mud volcanoes (Brown, 1990). The ejected muds accumulate as a ring around the venting diatreme (MacDonald and Peccini, 2009;Stoppa, 2006;Yusifov and Rabinowitz, 2004). Diatreme activity can cease and give way to the formation of mound-like mud volcanoes if the erupting sediment becomes clast-rich, with a lower fluid content (Lance et al, 1998;MacDonald and Peccini, 2009).…”

Section: Origins Of Landforms In Candor Chaosmentioning

confidence: 99%

Morphologic evidence of subsurface sediment mobilization and mud volcanism in Candor and Coprates Chasmata, Valles Marineris, Mars

Okubo

2016

Icarus

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Populations of distinctive knobs, rings and lobate structures are observed in the Candor and Coprates Chasmata regions of Mars. To interpret the formation mechanisms of these landforms, I investigate their morphologies, facies, superposition and crosscutting relationships using data from the High Resolution Imaging Science Experiment (HiRISE) and the High Resolution Stereo Camera (HRSC). The knobs and rings have quasi-circular to elliptical shapes in map view, with basal diameters between several hundred meters and three kilometers. The knobs rise ∼10 to 350 m above the surrounding terrain, while the rings are ∼10 to 70 m tall. In three dimensions the knobs have a rounded cone shape, and some knobs exhibit a summit depression, which in some examples contains a subordinate mound. The rings have rounded to sharp crests and in some instances contain subordinate rings and mounds. The lobate structures are commonly ∼1 to 2 km wide, ∼3 to 5 km long and rise up to 50 m above the surrounding terrain. The lobate structures partially or completely encircle some knobs, rings and irregularly shaped rock masses. The knobs, rings and lobate structures exhibit massive and stratified facies, with some structures exhibiting both, such as a massive central rock mass surrounded by outwardly dipping layers. I interpret these landforms as mud volcanoes, injectites and mud flows based on superposition and cross-cutting relationships as well as similarities between the morphologies and facies of these landforms with terrestrial products of mud volcanism. I infer the source of sediment for this mud volcanism to be the Hesperian eolian deposits that occur within these chasmata. Further, I suggest that groundwater upwelling during the Hesperian to possibly the Early Amazonian facilitated the mobilization of these sediments within the subsurface and thereby contributed to the ensuing mud volcanism. Based on these results, I propose that the Candor Chaos formed through subsurface sediment mobilization and mud volcanism. Published by Elsevier Inc.

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Section: Origins Of Landforms In Candor Chaosmentioning

confidence: 99%

Morphologic evidence of subsurface sediment mobilization and mud volcanism in Candor and Coprates Chasmata, Valles Marineris, Mars

Okubo

2016

Icarus

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“…2) and its B. childressi population are distinctly different. Currently interpreted as a brine-filled mud volcano at a depth of 650 m (MacDonald & Peccini 2009), the pool contains a 130 ‰ salinity sulfate-free brine originating from seawater contact with massive halite within the seafloor (MacDonald et al 1990, Dattagupta et al 2004. This and other seep-associated brine pools may represent very large re servoirs of dissolved methane (Wan kel et al 2010).…”

Section: Site Selectionmentioning

confidence: 99%

Trophic plasticity of the methanotrophic mussel Bathymodiolus childressi in the Gulf of Mexico

Riekenberg¹,

Carney

Fry³

2016

Mar. Ecol. Prog. Ser.

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“…Furthermore, hydrocarbon discharges associated with eruptive mud volcanism can be episodically large (MacDonald et al, 2000;MacDonald and Peccini, 2009). However, seeps detected by SAR in the central and western Gulf of Mexico have generally been persistent on annual and decadal scales (De Beukelaer et al, 2003;Garcia-Pineda et al, 2010;Garcia-Pineda Oscar, 2009).…”

Section: Natural Seepage Processesmentioning

confidence: 99%

Transience and persistence of natural hydrocarbon seepage in Mississippi Canyon, Gulf of Mexico

Garcia-Pineda

MacDonald

Silva

et al. 2016

Deep Sea Research Part II: Topical Studies in Oceanography

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of natural Hydrocarbon seepage in Mississippi canyon, gulf of Mexico, DeepSea Research Part II, http://dx. AbstractAnalysis of the magnitude of oil discharged from natural hydrocarbon seeps can improve understanding of the carbon cycle and the Gulf of Mexico (GOM) ecosystem. With use of a large archive of remote sensing data, in combination with geophysical and multibeam data, we identified, mapped, and characterized natural hydrocarbon seeps in the Macondo prospect region near the wreck site of the drill-rig Deepwater Horizon (DWH). Satellite image processing and the cluster analysis revealed locations of previously undetected seep zones. Including duplicate detections, a total of 562 individual gas plumes were also observed in multibeam surveys. In total, SAR imagery confirmed 52 oil-producing SZ in the study area. In almost all cases gas plumes were associated with oil-producing seep zones. The cluster of seeps in the vicinity of lease block MC302 appeared to host the most persistent and prolific oil vents. Oil slicks and gas plumes observed over the DWH site were consistent with discharges of residual oil from the wreckage. In contrast with highly persistent oil seeps observed in the Green Canyon and Garden Banks lease areas, the seeps in the vicinity of Macondo Prospect were intermittent. The difference in the number of seeps and the quantity of surface oil detected in Green Canyon was almost two orders of magnitude greater than in Mississippi Canyon. Garcia et al. Hydrocarbon Seepage in Mississippi Canyon

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Distinct activity phases during the recent geologic history of a Gulf of Mexico mud volcano

Cited by 17 publications

References 44 publications

Morphologic evidence of subsurface sediment mobilization and mud volcanism in Candor and Coprates Chasmata, Valles Marineris, Mars

Morphologic evidence of subsurface sediment mobilization and mud volcanism in Candor and Coprates Chasmata, Valles Marineris, Mars

Trophic plasticity of the methanotrophic mussel Bathymodiolus childressi in the Gulf of Mexico

Transience and persistence of natural hydrocarbon seepage in Mississippi Canyon, Gulf of Mexico

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