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  • 11
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    AGU (American Geophysical Union)
    In:  Geophysical Research Letters, 23 (18). pp. 2477-2480.
    Publikationsdatum: 2016-01-29
    Beschreibung: The mode of crustal thinning in the southwestern margin of the Iberian Peninsula is investigated along a transect that extends from onshore Iberia to the eastern end of the Horseshoe Abyssal Plain. On onshore areas, the crustal structure has been deduced using wide-angle seismic reflection data, whereas offshore we have used coincident steep and wide-angle reflection data along a NE-SW oriented seismic profile that extends from Cape San Vicente to the Horseshoe Abyssal Plain. In addition, 2D gravity modelling has been performed to validate the crustal structure deduced from seismic data. Our model results reveal that the crust undergoes a strong but continuous thinning from 31 km onshore Iberia to less than 15 km in the Horseshoe Abyssal Plain and that thinning occurs over horizontal distances of about 120 km.
    Materialart: Article , PeerReviewed
    Format: text
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  • 12
    Publikationsdatum: 2021-10-29
    Beschreibung: 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.
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
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  • 13
    Publikationsdatum: 2022-05-10
    Beschreibung: The immense advances in computer power achieved in the last decades have had a significant impact in Earth science, providing valuable research outputs that allow the simulation of complex natural processes and systems, and generating improved forecasts. The development and implementation of innovative geoscientific software is currently evolving towards a sustainable and efficient development by integrating models of different aspects of the Earth system. This will set the foundation for a future digital twin of the Earth. The codification and update of this software require great effort from research groups and therefore, it needs to be preserved for its reuse by future generations of geoscientists. Here, we report on Geo-Soft-CoRe, a Geoscientific Software & Code Repository, hosted at the archive DIGITAL.CSIC. This is an open source, multidisciplinary and multiscale collection of software and code developed to analyze different aspects of the Earth system, encompassing tools to: 1) analyze climate variability; 2) assess hazards, and 3) characterize the structure and dynamics of the solid Earth. Due to the broad range of applications of these software packages, this collection is useful not only for basic research in Earth science, but also for applied research and educational purposes, reducing the gap between the geosciences and the society. By providing each software and code with a permanent identifier (DOI), we ensure its self-sustainability and accomplish the FAIR (Findable, Accessible, Interoperable and Reusable) principles. Therefore, we aim for a more transparent science, transferring knowledge in an easier way to the geoscience community, and encouraging an integrated use of computational infrastructure.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
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  • 14
    Publikationsdatum: 2021-12-13
    Beschreibung: We present new crust and lithosphere thickness maps of the African mainland based on integrated modeling of elevation and geoid data and thermal analysis. The approach assumes local isostasy, thermal steady state, and linear density increase with depth in the crust and temperature-dependent density in the lithospheric mantle. Results are constrained by a new comprehensive compilation of seismic Moho depth data consisting of 551 data points and by published tomography models relative to LAB depth. The crustal thickness map shows a N-S bimodal distribution with higher thickness values in the cratonic domains of southern Africa (38–44 km) relative to those beneath northern Africa (33–39 km). The most striking result is the crustal thinning (28–30 km thickness) imaged along the Mesozoic West and Central African Rift Systems. Our crustal model shows noticeable differences compared to previous models. After excluding the Afar plume region, where the modeling assumptions are not fulfilled, our model better fits the available seismic data (76.3% fitting; root mean square error = 4.3 km). The LAB depth map shows large spatial variability (90 to 230 km), with deeper LAB related to cratonic domains and shallower LAB related to Mesozoic and Cenozoic rifting domains, in agreement with tomography models. Though crustal and lithosphere thickness maps show similar regional patterns, major differences are found in the Atlas Mountains, the West African Rift System, and the intracratonic basins. The effects of lateral variations in crustal density as well as the nonisostatic contribution to elevation in the Afar plume region, which we estimate to be ~1.8 km, are also discussed.
    Materialart: info:eu-repo/semantics/article
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  • 15
    Publikationsdatum: 2023-07-07
    Beschreibung: Renewable energy sources are crucial for achieving a transition to a cleaner energy system. Geothermal energy, in particular, is a promising source of energy production. However, its effectiveness depends on a thorough understanding of temperature distribution, fluid circulation, and lithological and petrophysical properties of the crust. Over the past two decades, several methodologies and numerical codes have been developed to better understand the properties of the thermal lithosphere, including its temperature, density, and composition. In this presentation, we summarize the major advances in these developments and discuss their geodynamic implications in the Iberian Peninsula and surrounding regions. Based on available thermal modelling results, we present a compilation of the temperature distribution at different depths in the Iberian Peninsula and the thermal Lithosphere-Asthenosphere Boundary. At a depth of 5 km, temperatures exceed 110°C, with higher local anomalies in the Iberian Massif and Cenozoic volcanic provinces. Similar patterns are observed at depths of 10 and 20 km, with temperatures exceeding 190°C and 350°C, respectively. Although no lithospheric anomalies are observed that could produce high temperatures at shallow depths, there is significant potential for exploitation at intermediate depths. Overall, the potential for direct use of geothermal energy for district and greenhouse heating, as well as for industrial processes, is significant throughout the Peninsula. The main challenges in exploiting this potential are the availability of groundwater and the cost of drilling.
    Sprache: Englisch
    Materialart: info:eu-repo/semantics/conferenceObject
    Standort Signatur Einschränkungen Verfügbarkeit
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