Electronic Resource
Opposite Symmetry in the Lithospheric Structure of the Alboran and Algerian Basins and Their Margins (Western Mediterranean): Geodynamic Implications
| العنوان: | Opposite Symmetry in the Lithospheric Structure of the Alboran and Algerian Basins and Their Margins (Western Mediterranean): Geodynamic Implications |
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| المؤلفون: | European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Generalitat de Catalunya, Equinor, Vergés, Jaume [0000-0002-4467-5291], Kumar, Ajay [0000-0002-2669-355X ], Fernandez, Manel [0000-0002-4487-2359], Torné, Montserrat [0000-0001-6585-4283], Jimenez-Munt, Ivone [0000-0003-4178-3585], Kumar, Ajay, Fernández Ortiga, Manel, Vergés, Jaume, Torné, Montserrat, Jimenez-Munt, Ivone |
| بيانات النشر: | John Wiley & Sons 2021-06 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The geodynamic evolution of the Western Mediterranean for the past 35 My is a matter of debate. Present-day structure and composition of the lithosphere and sublithospheric mantle may help in constraining the geodynamic evolution of the region. We use an integrated geophysical-petrological modeling to derive and compare the present-day thermal, density and compositional structure of the lithosphere and sublithospheric mantle along two NNW-SSE oriented transects crossing the back-arc Alboran and Algerian basins, from onshore Iberia to the northern Africa margin. The crust is constrained using available seismic data and geological cross-sections, whereas seismic tomography and mantle xenoliths constrain the upper mantle structure and composition. Results show a thick crust (37 and 30 km) and a relative deep LAB (130 and 150 km) underneath the HP/LT metamorphic units of the Internal Betics and Greater Kabylies, respectively, which contrast with the 16 km thick magmatic crust of the Alboran Basin and the 10 km thick oceanic crust of the Algerian Basin. The sharp change in lithosphere thickness, from the orogenic wedge to the back-arc basins, contrasts with the gentler lithosphere thickening toward the respective opposed margins. Our results confirm the presence of detached slabs ∼400 °C colder than upper mantle and a fertile composition than the continental lithospheric mantle beneath the External Betics and Saharan Atlas. Presence of detached quasi-vertical sublithospheric slabs dipping toward the SSE in the Betics and toward the NNW in the Kabylies and the opposed symmetric lithospheric structure support an opposite dipping subduction and retreat of two adjacent segments of the Jurassic Ligurian-Tethys realm. |
| مصطلحات الفهرس: | Lithospheric structure, Western mediterranean, Integrated geophysical-petrological modeling, Ligurian-tethys slabs, Dynamic topography, artículo |
| URL: | Publisher's version Sí info:eu-repo/grantAgreement/674899 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-095154-B-I00 |
| الاتاحة: | Open access content. Open access content http://creativecommons.org/licenses/by/4.0 openAccess |
| ملاحظة: | English |
| Other Numbers: | CTK oai:digital.csic.es:10261/247468 Journal of Geophysical Research - Part B - Solid Earth, 126(7): e2020JB021388 (2021) 2169-9313 10.1029/2020JB021388 2169-9356 1286579390 |
| المصدر المساهم: | CSIC From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1286579390 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |