In situ cone penetration tests at the active Dashgil mud volcano, Azerbaijan: Evidence for excess fluid pressure, updoming, and possible future violent eruption

Kopf, Achim J; Stegmann, Sylvia; Delisle, G.; Panahi, Behrouz; Aliyev, Chingiz S.; Guliyev, Ibrahim S.

doi:10.1016/j.marpetgeo.2008.11.005

Cited by 17 publications

(19 citation statements)

References 22 publications

(25 reference statements)

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“…At the bottom of salsas, Kopf et al (2009) identified the presence of conduits where overpressurized fluids outflow with an excess pore pressure very similar to the estimated lithostatic pressure. Morphological indications of possible updoming of the crater in association with gas outflow variations (Kopf et al, 2009(Kopf et al, , 2010 suggest that a shallow fluid reservoir could exist under the crater, where dynamic equilibrium exists between pressure of uprising gas and overlying dry clays.…”

Section: The Dashgil Mud Volcanomentioning

confidence: 81%

“…Beyond this paroxystic activity, it also represents a good example of mud volcano with high seep activity in the dormant period (Planke et al, 2003). Due to these features, Dashgil volcano has been extensively studied in the past from the geomorphologicalgeostructural (Hovland et al, 1997;Roberts et al, 2011), geochemical (Planke et al, 2003), and geotechnical (Kopf et al, 2009) point of view and was the object of long-term monitoring of gaseous emissions (mainly Methane) at the summit area (Kopf et al, 2010).…”

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

“…In both, gas bubbles rise from the bottom of the lakes, which reach maximum depths of about 10 m and 8 m, respectively (Kopf et al, 2009). Geochemical analyses (Planke et al, 2003) suggest that the water-dominated salsas represent expulsions of shallow waters, whereas deep-seated waters percolate slowly to the surface and are expelled as mud-water mixtures in gryphons and springs.…”

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

“…Etiope et al (2004b), by taking into account both venting (pools and gryphons) and microseepage, estimated a total average methane output around 140 m 3 h −1 . An estimate of the order of 1 m 3 h −1 was provided by Kopf et al (2009Kopf et al ( , 2010 after four years of nearly continuous gas monitoring at the salsas, i.e. a selected single emissions among the ones present in area.…”

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

“…Morphological indications of possible updoming of the crater in association with gas outflow variations (Kopf et al, 2009(Kopf et al, , 2010 suggest that a shallow fluid reservoir could exist under the crater, where dynamic equilibrium exists between pressure of uprising gas and overlying dry clays. Gas present in this reservoir could be the source of both gas emissions at the salsas and of high viscosity mud outflow and bubbling at the mud cones.…”

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

See 4 more Smart Citations

Monitoring methane emission of mud volcanoes by seismic tremor measurements: a pilot study

Albarello

Palo

Martinelli

2012

Nat. Hazards Earth Syst. Sci.

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Abstract.A new approach for estimating methane emission at mud volcanoes is here proposed based on measurements of the seismic tremor on their surface. Data obtained at the Dashgil mud volcano in Azerbaijan reveal the presence of energy bursts characterized by well-determined features (i.e. waveforms, spectra and polarization properties) that can be associated with bubbling at depth. Counting such events provides a possible tool for monitoring gas production in the reservoir, thus minimizing logistic troubles and representing a cheap and effective alternative to more complex approaches. Specifically, we model the energy bursts as the effect of resonant gas bubbles at depth. This modelling allows to estimate the dimension of the bubbles and, consequently, the gas outflow from the main conduit in the assumption that all emissions from depth occur by bubble uprising. The application of this model to seismic events detected at the Dashgil mud volcano during three sessions of measurements carried out in 2006 and 2007 provides gas flux estimates that are in line with those provided by independent measurements at the same structure. This encouraging result suggests that the one here proposed could be considered a new promising, cheap and easy to apply tool for gas flux measurements in bubbling gas seepage areas.

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Section: The Dashgil Mud Volcanomentioning

confidence: 81%

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

Section: The Dashgil Mud Volcanomentioning

confidence: 99%

See 3 more Smart Citations

Monitoring methane emission of mud volcanoes by seismic tremor measurements: a pilot study

Albarello

Palo

Martinelli

2012

Nat. Hazards Earth Syst. Sci.

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Rapid sediment mapping and in situ geotechnical characterization in challenging aquatic areas

Albatal

Stark

2017

Limnology & Ocean Methods

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Yakutat Bay, Southeast Alaska, is characterized by significant spatial variations in sediment type and dynamics. The northwestern side is supplied by sediments from the nearby glaciers, and is affected by longshore sediment transport processes, while the southeastern side has no direct sediment input, and is affected by human activities. In situ seabed investigations can be difficult, and expensive, due to logistical challenges in such remote locations. A portable free fall penetrometer (PFFP) was deployed 149 times along 16 transects in water depths of 2–48 m. The deceleration and pore pressure records during the probe's penetration into the seabed were used to characterize the surficial sediments. Equivalents of quasi‐static bearing capacity were determined using the deceleration‐depth signatures, and yielded strong variabilities ranging from 5 to 107 kPa at sediment depths of 10.3–41.9 cm. Correlating the PFFP results to visual field observations and literature, a regional classification scheme, and an updated sediment distribution map were derived. The pore pressure response was correlated to the different sediment types, and was used to assess the sediment's consolidation state. At the northwestern side, an increasing pore pressure trend indicated underconsolidated cohesive sediments. At the southeastern side, clayey sediments appeared to be more consolidated except of sediments of high organic content near the populated areas. The use of the pore pressure measurements represents a novel way for rapid sediment characterization using PFFP. The presented approach to create rapidly a regional sediment classification scheme offers a time‐ and cost‐effective method to derive seabed sediment maps in areas of difficult access and logistics.

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Petrophysical Support of Geophysical Studies

Alizadeh

Guliyev

Kadirov

et al. 2016

Geosciences of Azerbaijan

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In situ cone penetration tests at the active Dashgil mud volcano, Azerbaijan: Evidence for excess fluid pressure, updoming, and possible future violent eruption

Cited by 17 publications

References 22 publications

Monitoring methane emission of mud volcanoes by seismic tremor measurements: a pilot study

Monitoring methane emission of mud volcanoes by seismic tremor measurements: a pilot study

Rapid sediment mapping and in situ geotechnical characterization in challenging aquatic areas

Petrophysical Support of Geophysical Studies

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