Izvestiya, Physics of the Solid Earth

, Volume 46, Issue 5, pp 412–418 | Cite as

Structure formation in the rift zones and in the tranvers offset of the spreading axes: Results of physical modeling



The paper presents the results of experimental modeling of the specific features in the structure formation within the rift zones and also within lateral displacements of the spreading axes such as transform faults and nontransform displacements. The experiments were conducted on materials consisting of liquid and solid hydrocarbons; the similarity conditions were taken into account.

The parameters, which were varied in the experiments, included (1) the thickness of the model lithosphere in the rift zone, the thickness of the lithosphere in the zone of the nontransform displacement, and the thickness of the ambient lithosphere; (2) the value of displacement between the rift segments; and (3) the spreading rate. The modeling revealed the specific features in the structure formation and segmentation of the spreading axes in case of the orthogonal and oblique extension of the model lithosphere; also, the critical values of the lateral displacement of the spreading axes, which cause changes in the pattern of the structure formation within zones of transverse displacements, were estimated.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    R. S. Detrick, H. D. Needham, and V. Renard, “Gravity Anomalies and Crustal Thickness Variations along the Mid-Atlantic Ridge between 33°N and 40°N,” J. Geophys. Res. 100(B3), 3767–3787 (1995).CrossRefGoogle Scholar
  2. 2.
    E. P. Dubinin and S. A. Ushakov, Oceanic Rift Genesis (GEOS, Moscow, 2001) pp. 1–293 [in Russian].Google Scholar
  3. 3.
    A. L. Grokholskii and E. P. Dubinin, “The Experimental Modeling of the Structure-Forming Deformations in the Rift Zones of the Mid-Ocean Ridges,” Geotectonika, No. 1, 76–94 (2006).Google Scholar
  4. 4.
    K. C. Macdonald, “Linkages between Faulting, Volcanism, Hydrothermal Activity and Segmentation on Fast Spreading Centers. Faulting and Magmatism at Mid-Ocean Ridges,” Geophys. Monogr. Ser., AGU, Washington, D.C., 106, 27–58 (1998).Google Scholar
  5. 5.
    B. V. Malkin and A. I. Shemenda, “Mechanism of Rifting: Considerations Based on Results of Physical Modeling and on Geological and Geophysical Data,” Tectonophys. 199, 193–210 (1991).CrossRefGoogle Scholar
  6. 6.
    J.-C. Sempere, J. Lin, H. S. Brown, H. Schouten, and G. M. Purdy, “Segmentation and Morphotectonic Variations Along a Slow-Spreading Center: The Mid-Atlantic Ridge (24°00′N-30°40′N),” Mar. Geophys. Res. 15, 153–200 (1993).CrossRefGoogle Scholar
  7. 7.
    A. I. Shemenda, “Similarity Criteria on the Mechanical Simulation of Tectonic Processes,” Geol. Geofiz., No. 10, 10–19 (1983).Google Scholar
  8. 8.
    A. I. Shemenda and A. L. Grokhol’skii, “About the Mechanism of Formation and Development of the Overlap Zones of the Spreading Axes,” Tikhookean. Geol., No. 5, 97–107 (1988).Google Scholar
  9. 9.
    A. I. Shemenda and A. L. Grocholsky, “Physical Modeling of Slow Seafloor Spreading,” J. Geophys. Res. 99, 9137–9153 (1994).CrossRefGoogle Scholar
  10. 10.
    S. Spencer, D. K. Smith, R. C. Johnson, J. Lin and E. Mcallister, “Structure and Stability of Non-Transform Discontinuities of the Mid-Atlantic Ridge between 24°N and 30°N,” Mar. Geophys. Res. 19, 339–362 (1997).CrossRefGoogle Scholar
  11. 11.
    G. W. Tuckwell, J. M. Bull, and D. J. Sanderson, “Numerical Models of Faulting at Oblique Spreading Centers,” J. Geophys. Res. 103, 15473–15482 (1998).CrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  1. 1.Museum of the Earth SciencesMoscow State UniversityMoscowRussia

Personalised recommendations