1887

Abstract

Summary

A numerical model was used for a geomechanical analysis of dike formation beneath the Koryaksky Volcano, which was active during 2008 through 2009. We investigated whether seismicity associated with the volcanic activity may have been influenced by flow of magma into preexisting fault structures. In our conceptual model, magma flowed into a 2 km (along dip) by 2 km (along strike) fracture located at a depth of 6000 m (-3000 m abs.) with a dip angle of 60. In the model, magma was injected into the fracture over the period of one day at a rate of 2000 kg/s and a maximum pressure of 200 MPa. The initial fluid pressure in the fault was 50 MPa. The magma density was 2800 kg/m3. We tested various magma viscosities ranging from 200 Pa s (andesitic magma) to 2 Pa s (basaltic magma). The state of stress in the study are was determined in a previous study.

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/content/papers/10.3997/2214-4609.201700475
2017-05-15
2024-04-25
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References

  1. KiryukhinA.V., FedotovS.A. and KiryukhinP.A.
    : A Geomechanical Interpretation of the Local Seismicity Related to Eruptions and Renewed Activity on Tolbachik, Koryakskii, and Avacha Volcanoes, Kamchatka, in 2008–2012, Journal of Volcanology and Seismology, 10(5), (2016), 275¬291.
    [Google Scholar]
  2. KiryukhinA., NorbeckJ.
    Analysis of Magma Injection Beneath an Active Volcano Using a Hydromechanical Numerical Model PROCEEDINGS, 42nd Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February13–15, 2017 p.740–747.
    [Google Scholar]
  3. McClure, M.W. and Horne, R.N.
    : Discrete Fracture Network Modeling of Hydraulic Stimulation: Coupling Flow and Geomechanics, Springer, (2013), doi:10.1007/978‑3‑319‑00383‑2.
    https://doi.org/10.1007/978-3-319-00383-2 [Google Scholar]
  4. McClure, M.W.
    : CFRAC (version 1.2) Complex Fracturing Research Code User's Guide (version 20), December, (2014).
    [Google Scholar]
  5. Sigmundsson, F., Hooper, A., Hreinsdorttir, S.
    , et al., Segmented lateral dyke growth in a rifting event at Barrparbunga volcanic system, Iceland, Nature, 2015, vol. 517, pp. 191-194. doi 10.1038/nature14.
    https://doi.org/10.1038/nature14 [Google Scholar]
  6. ZobackM.D.
    : Reservoir Geomechanics, Cambridge University Press, (2007), 448 p.
    [Google Scholar]
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