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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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| Maillard, Agnès; Gaullier, Virginie; Lézin, Carine; Chanier, Frank; Odonne, Francis; Lofi, Johanna. |
| As the Messinian sea-level draw down associated with the Messinian Salinity Crisis is still questioned, we propose to show that the widely spread erosion surface affecting the Mediterranean margins is indeed linked to an exondation demonstrated from offshore and onshore data. Our study presents a comprehensive onshore to offshore correlation of the Messinian erosional surface. It is focused on small drainage systems or interfluve areas, outside of evaporite basins or incised canyons, where the Messinian erosion had not yet been studied previously: around Ibiza on the Balearic Promontory and around Orosei on the Eastern Sardinian margin, Tyrrhenian Basin, both areas where new offshore data were recently acquired. We show that the late Messinian erosion... |
| Tipo: Text |
Palavras-chave: Crise de salinité messinienne; Méditerranée nord-occidentale; Surface d' Érosion; Ibiza; Marge est-sarde; Messinian Salinity Crisis (MSC); Northwestern Mediterranean; Erosion surface; Ibiza; Eastern Sardinian margin. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00622/73392/72608.pdf |
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