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| Blouin, Arthur; Imbert, Patrice; Sultan, Nabil; Callot, Jean-paul. |
| The morphology of mud volcanoes (MV) has been extensively studied over the last few decades. Although recent research has begun to focus on deep processes and structures, little is known about mud generation mechanisms. This study aims to investigate the feeder system and formation of an active kilometer‐scale MV by relying on a 3‐D seismic survey and an in‐situ dataset on the Absheron anticline (South Caspian Basin). Seismic data show a depleted area in the Anhydritic Surakhany Formation (ASF), whose mineralogical composition fits with surface mud. Well data show that the ASF is a succession of evaporitic beds and low temperature shales near its fracture pressure. Biostratigraphic analysis confirms a Pliocene origin for the mud, suggesting that the ASF... |
| Tipo: Text |
Palavras-chave: Mud volcano; Pore pressure; Methane; Modeling; Seismic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00481/59304/62057.pdf |
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| Odonne, Francis; Imbert, Patrice; Dupuis, Matthieu; Aliyev, Adil A.; Abbasov, Orhan R.; Baloglanov, Elnur E.; Vendeville, Bruno C.; Gabalda, Germinal; Remy, Dominique; Bichaud, Victoria; Juste, Rémy; Pain, Maëlys; Blouin, Arthur; Dofal, Anthony; Gertauda, Mathieu. |
| We investigated the mode of growth of flat-topped mud volcanoes, through the study of three active edifices onshore Azerbaijan: they are the Bozdag-Guzdek, the Ayazakhtarma and the Akhtarma-Pashaly mud volcanoes. The three edifices are up to 80 m high and 3 km wide, and the recurrence time between eruptions from a few months to a few years. Surface changes during and between eruptions were documented by a combination of mapping from satellite pictures, repeated direct observation over five years and structural analysis. In addition, resistivity profiles and microgravity measurements were used to decipher their subsurface geometries. We interpret the flat-topped character of the mud volcanoes as the result of rapid “isostatic” readjustment of a brittle... |
| Tipo: Text |
Palavras-chave: Flat-topped mud-volcanoes; Azerbaijan; Growth of flat mud volcanoes; Resistivity-gravity data; Low-density mud at depth; Mudflows stacking; Soft mud. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00515/62689/67076.pdf |
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| Blouin, Arthur; Sultan, Nabil; Callot, Jean-paul; Imbert, Patrice. |
| Gassy sediments are common in marine environments and are characterized by a specific mechanical behavior significantly different from that of water-saturated sediments. It is shown that gas causes damage and initiates fractures in sediments. To define the controlling parameters dominating the damage process during gas exsolution and its consequences in terms of hydro-mechanical behavior, we developed a specific consolidation apparatus to test sediments collected from the active Absheron Mud Volcano. Indeed, mud volcano formation is initiated by gas exsolution and subsequent mud generation at depth from stratified sediments. Gas was generated in the samples by circulating carbonated water through the fine-grained sediments, then decreasing the total... |
| Tipo: Text |
Palavras-chave: Consolidation testing; Gas exsolution; Gassy sediments; Sediment damage; Mud volcano. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00588/70043/67974.pdf |
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