دورية أكاديمية
Evolution model for the Absheron Mud Volcano: from stratified sediments to fluid mud generation
| العنوان: | Evolution model for the Absheron Mud Volcano: from stratified sediments to fluid mud generation |
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| المؤلفون: | Blouin, Arthur, Sultan, Nabil, Pierron, Alexandra, Imbert, Patrice, Callot, Jean‐paul |
| المصدر: | Journal Of Geophysical Research-earth Surface (2169-9003) (American Geophysical Union (AGU)), 2020-12 , Vol. 125 , N. 12 , P. e2020JF005623 (27p.) |
| بيانات النشر: | American Geophysical Union (AGU) |
| سنة النشر: | 2020 |
| المجموعة: | Ifremer (French Research Institute for Exploitation of the Sea): Archimer |
| مصطلحات موضوعية: | mud volcano, numerical modeling, geohazard, sediment remobilization, methane |
| الوصف: | Submarine mud volcanoes are one of the most spectacular methane expulsion features at the seafloor and they represent a significant geohazard worldwide. In this work we focus on the physical processes controlling the initiation and early evolution of the Absheron mud volcano (AMV). Our analyses were carried out based on basin modeling calibrated thanks to existing seismic interpretation of the AMV, analysis of sediment samples from seabed, and data from two exploration wells. Acquired laboratory geotechnical data allowed us to derive laws considering the impact of gas exsolution on host sediment behaviors. In this study, we identified key geological and physical conditions that led to mud volcano formation: by coupling diffusion processes with hydrofracturing and fluid advection, we were able to simulate the conditions required to generate mud 3.5 km below the AMV. Mud remobilization up to the seabed was reproduced by using Navier‐Stokes equations modified to account for the impact of gas expansion on mud density. Considering density inversion only, simulations indicate that mud would be extruded at the seabed 100 years after its generation, an ascent rate similar to extrusion rates measured at the active Kotyrdag mud volcano in Azerbaijan. This article is protected by copyright. All rights reserved. Plain Language Summary Mud volcanoes build‐up at the Earth surface from liquidized sediments remobilized from depths reaching several kilometers. They are distributed globally, onshore and offshore, in different geological backgrounds and represent serious geohazards for people and infrastructures. Moreover, they are also among the most spectacular methane expulsion features at the surface, participating to the global budget of green‐house gases emissions. Their understanding is thus paramount to prevent natural catastrophes such as Lusi eruption in Indonesia in 2006 and to quantify the human impact on global warming. If mud volcanoes are known for centuries (Pline the Elder) and studied for decades, little is known ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://archimer.ifremer.fr/doc/00658/77002/78258.pdfTest; https://archimer.ifremer.fr/doc/00658/77002Test/ |
| DOI: | 10.1029/2020JF005623 |
| الإتاحة: | https://doi.org/10.1029/2020JF005623Test https://archimer.ifremer.fr/doc/00658/77002/78258.pdfTest https://archimer.ifremer.fr/doc/00658/77002Test/ |
| حقوق: | info:eu-repo/semantics/openAccess ; restricted use |
| رقم الانضمام: | edsbas.B65615E7 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1029/2020JF005623 |
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