1887

Abstract

Summary

To avoid shortcomings of the current models attempting to explain genesis of the Vrancea intermediate-depth earthquakes the alternative model of an unstable triple junction (VTJ) had been previously proposed mainly based on a speculative approach.

The paper deals with results of the latest research, including high-resolution seismic tomography obtained through the joint inversion of seismic and gravity data, and numerical modelling of the mantle convection that brings new evidence to support VTJ as a valid alternative for Vrancea intermediate-depth seismicity geodynamic setting.

Of a special interest proved to be the advanced numerical modelling run on a High Performance Computing Cluster own by Solid Earth Dynamics Department in the Institute of Geodynamics of the Romanian Academy that has demonstrated how a stable triple lithospheric contact may transform into an unstable triple junction under the influence of a thermal anomaly even in the absence of differences between the plates velocities.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201702541
2017-11-05
2024-04-19
Loading full text...

Full text loading...

References

  1. Besutiu, L.
    [2001] Vrancea active seismic area: a continental unstable triple junction?Rev. Roum. de Géophysique, 45, 59–72
    [Google Scholar]
  2. Besutiu, L., Zugrăvescu, D.
    [2004] Considerations on the Black Sea opening and related geodynamic echoes in its NW inland as inferred from geophysical data interpretation. Ukrainian Geologist, 3, 51–60
    [Google Scholar]
  3. Constantinescu, L., Constantinescu, P., Cornea, I., Lăzărescu, V.
    , 1976. Recent seismic information on the lithosphere of Romania. Rev. Roum. Géol., Géophys. et Géogr., Géophysique, 20, 33–40
    [Google Scholar]
  4. Girbacea, R., Frisch, W.
    [1998] Slab in the wrong place; lower lithospheric mantle delamination in the last stage of the eastern Carpathian subduction retreat. Geology26, 611–614
    [Google Scholar]
  5. Ismail-Zadeh, A.T., Keilis-Borok, V.I., Soloviev, A.A.
    [1999] Numerical modelling of earthquake flow in the southeastern Carpathians (Vrancea): effect of a sinking slab. Physics of the Earth and Planetary Interiors111, 267–274
    [Google Scholar]
  6. Lorinczi, P., Houseman, G.A.
    [2009] Lithospheric gravitational instability beneath the Southeast Carpathians. Tectonophysics, 474, 1–2, 322–336
    [Google Scholar]
  7. Manea, V.C., Manea, M., Pomeran, M, Besutiu, L., Zlagnean, L.
    [2012] Computational Fluid Dynamics in Solid Earth Sciences – a HPC challenge. Acta Universitaria, 22 (5), 32–36
    [Google Scholar]
  8. McKenzie, D.P., MorganW.J.
    [1969] Evolution of triple junctions. Nature, 224, 125–133
    [Google Scholar]
  9. Sperner, B., Lorenz, F.P., Bonjer, K.P., Hettel, S., Müller, B., Wenzel, F.
    [2001] Slab break-off—abrupt cut or gradual detachment? New insights from the Vrancea Region (SE Carpathians, Romania). Terra Nova13 (3), 172–179
    [Google Scholar]
  10. Stănică, D., Stănică, M., Visarion, M.
    [1986] The structure of the crust and upper mantle in Romania as deduced from magnetotelluric data. Rev. Roum. Geol.,Geopys., Geogr., Geophysique, 30, 25–36
    [Google Scholar]
  11. Tondi, R., Achauer, U., Landes, M., Davi, R., Besutiu, L.
    [2009] Unveiling seismic and density structure beneath the Vrancea seismogenic zone (Romania), J. Geophys. Res., 114, B11307, doi:10.1029/2008JB005992
    https://doi.org/10.1029/2008JB005992 [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201702541
Loading
/content/papers/10.3997/2214-4609.201702541
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error