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Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales

Relevant editorial teams:

  • Geodynamics, geodesy, gravity, and geomagnetism | H. Davies, J. Aubert, A. Davaille, T. Gerya, N. Gillet, M. Mandea, and S. McClusky
  • Geochemistry, mineralogy, petrology, and volcanology | J. Gottsmann, A. di Muro, M. Heap, A. Longo, and P. Rey
  • Seismics, seismology, geoelectrics, and electromagnetics | C. Krawczyk, U. Werban, M. Malinowski, T. Nissen-Meyer, I. Bianchi, and C. Beghein
  • Stratigraphy, sedimentology, and palaeontology | E. Samankassou, J. Eggenhuisen, S. Gardin, and A. Stroeven
  • Structural geology and tectonics, rock physics, experimental deformation | F. Rossetti, M. Allen, B. Grasemann, G. Peron-Pinvidic, and Y. van Dinter
Highlight articles

I present the GHOST (Geoscientific Hollow Sphere Tessellation) software which allows for the fast generation of computational meshes in hollow sphere geometries counting up to a hundred million cells. Each mesh is composed of concentric spherical shells made of quadrilaterals or triangles. I focus here on three commonly used meshes used in the geodynamics/geophysics community and further benchmark the gravity and gravitational potential procedures in the simple case of a constant density.

Valentin Samuel Gischig, Joseph Doetsch, Hansruedi Maurer, Hannes Krietsch, Florian Amann, Keith Frederick Evans, Morteza Nejati, Mohammadreza Jalali, Benoît Valley, Anne Christine Obermann, Stefan Wiemer, and Domenico Giardini

A balanced cross section across the hypocentre of the 2017 Iran-Iraq 7.3 Mw earthquake is presented. The structural style of the area is characterised by inversion tectonics with partial decoupling between the basement and the 10 km thick sedimentary cover. The main shock is located along a low-dipping lateral ramp of the Mountain Front Fault. The balanced cross section indicates that the Mountain Front Fault is the only fault where an 7.3 Mw earthquake may occur.

Stefano Tavani, Mariano Parente, Francesco Puzone, Amerigo Corradetti, Gholamreza Gharabeigli, Mehdi Valinejad, Davoud Morsalnejad, and Stefano Mazzoli

Hydraulic fracturing is known to induce seismic events, which is a concern for large-scale stimulations, for example, for exploitation of shale gas or geothermal energy. In our study on meter-scale hydraulic fracturing for stress measurements, we show that monitoring of seismicity along with refined seismicity location methods offers unique and ample insights into fracture growth processes. Fracture properties derived from seismicity reveal essential information about the stress state, thus helping to constrain other stress measurements.

Valentin Samuel Gischig, Joseph Doetsch, Hansruedi Maurer, Hannes Krietsch, Florian Amann, Keith Frederick Evans, Morteza Nejati, Mohammadreza Jalali, Benoît Valley, Anne Christine Obermann, Stefan Wiemer, and Domenico Giardini

This study shows the need for a symbiotic relationship between government and research groups for efficient management of geologic data in urban environments. Through its implementation, both the city administration and private companies benefit from the feedback of geologic knowledge acquired during this process, thereby substantially reducing the cost of construction projects and facilitating the development of aquifer management plans.

E. Vázquez-Suñé, M. Ángel Marazuela, V. Velasco, M. Diviu, A. Pérez-Estaún, and J. Álvarez-Marrón

The period between 1991 and 2005 was a time when many western geologists came to the Urals to get a closer look at this famous and extraordinarily rich region. The main reason was an openness policy of the USSR government, when foreigners were admitted to this area that was formerly almost closed. The co-operation of the western geologists with local specialists was very fruitful. The author aimed to describe the most interesting findings in Uralian geology after the learned guests left.

V. N. Puchkov

Publications Copernicus