التفاصيل البيبلوغرافية
| العنوان: |
Regional Geodynamic implications of new GNSS data from the Central Betic Cordillera |
| المؤلفون: |
Martin-Rojas, I., Alfaro, P., Galindo-Zaldivar, J., Borque-Arancon, M., García-Tortosa, F., Sanz de Galdeano, C., Aviles, M., Sánchez-Alzola, A., González-Castillo, L., Ruano, P., Medina-Cascales, I., Tendero-Salmerón, V., Madarieta-Txurruka, A., Pedrosa-González, M., Gil-Cruz, A. |
| المصدر: |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| سنة النشر: |
2023 |
| المجموعة: |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
| الوصف: |
We present GNSS data from a survey-mode network located in the Central Betic Cordillera. The Betic Cordillera is a collisional orogen, presently undergoing NNW-SSE shortening, as it is located in the convergence limit between Nubia and Eurasia Plates. Our GNSS network includes seven stations along a ca. 170 km long NE-SW striking profile. For these stations we calculated GNSS velocities from position time series. Then we calculated residual velocities with respect to a fixed Eurasia (ITRF2014 plate motion model(Altamimi et al., 2017)'}" id="614029728">). To discuss our data in terms of regional geodynamic implications we projected the velocity vectors along the N060E direction. The absolute value of the N060E component of the obtained vectors shows a general increase of velocity from NE to SW, pointing to a regional NE-SW extension. This is in good agreement with previously reported data. Our data permit us to quantify an extension rate of 2.0±0.3 mm/yr. Furthermore, we also quantify the strain partitioning within the Central Betic Cordillera, including the Guadix-Baza and the Granada basins areas of high extensional rates, separated by a low-deformed crustal horst. Therefore, the Central Betic Cordillera is an area undergoing 2.0±0.3 mm/yr of NE-SW extension within a collisional orogen. Furthermore, this area presents the highest topographic relive of the entire cordillera and an overthickenedcrust. We thus postulate that the extension quantified by our GNSS data could partially be the consequence of upper crustal extension related to gravitational instability. This instability would be produced by the overthickened crust. |
| نوع الوثيقة: |
conference object |
| اللغة: |
English |
| Relation: |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019551 |
| الاتاحة: |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019551 |
| رقم الانضمام: |
edsbas.C272F968 |
| قاعدة البيانات: |
BASE |