Theoretical deficiencies of isostatic schemes in modeling the crustal thickness along the convergent continental tectonic plate boundaries

Robert Tenzer; Mohammad Bagherbandi

doi:10.1007/s12583-015-0608-x

Volume 27 Issue 6

Nov 2016

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Journal of Earth Science > 2016 > 27(6): 1045-1053.

Robert Tenzer, Mohammad Bagherbandi. Theoretical deficiencies of isostatic schemes in modeling the crustal thickness along the convergent continental tectonic plate boundaries. Journal of Earth Science, 2016, 27(6): 1045-1053. doi: 10.1007/s12583-015-0608-x

Citation:

Robert Tenzer, Mohammad Bagherbandi. Theoretical deficiencies of isostatic schemes in modeling the crustal thickness along the convergent continental tectonic plate boundaries. Journal of Earth Science, 2016, 27(6): 1045-1053. doi: 10.1007/s12583-015-0608-x

Citation:

Robert Tenzer, Mohammad Bagherbandi. Theoretical deficiencies of isostatic schemes in modeling the crustal thickness along the convergent continental tectonic plate boundaries. Journal of Earth Science, 2016, 27(6): 1045-1053. doi: 10.1007/s12583-015-0608-x

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Theoretical deficiencies of isostatic schemes in modeling the crustal thickness along the convergent continental tectonic plate boundaries

doi: 10.1007/s12583-015-0608-x

Robert Tenzer^{1
,
,},
Mohammad Bagherbandi^{2, 3}

1.
School of Geodesy and Geomatics, Wuhan University, Wuhan, 430079, China
2.
Division of Geodesy and Geoinformatics, Royal Institute of Technology (KTH), SE-10044, Stockholm, Sweden
3.
Department of Industrial Development, IT and Land Management, University of Gävle, SE-80176, Gävle, Sweden

More Information

Corresponding author: Robert Tenzer: rtenzer@sgg.whu.edu.cn
Received Date: 15 Jan 2014
Accepted Date: 30 May 2014
Publish Date: 01 Dec 2016

Abstract

Abstract

The results of global and regional studies often show significant disagreement between the Moho depths determined using seismic and isostatic models. In this study, we estimate the differences between these two models in central Eurasia. The Vening Meinesz-Moritz (VMM) inverse problem of isostasy is utilized to determine the isostatic Moho depths. The estimated VMM Moho depths are then corrected for the sediment density contrast. The application of this correction improves the agreement between the isostatic and seismic Moho models. The existing discrepancies between the isostatic and seismic models are finally modeled by applying the non-isostatic correction, which accounts for the unmodelled mantle density heterogeneities and other geodynamic processes, which are not taken into account in classical isostatic models. Our results reveal that the non-isostatic correction still cannot fully describe mechanisms affecting the Moho geometry along the convergent continent-tocontinent tectonic plate boundaries occurring beneath Himalayas despite an overall good performance of the applied method.
- crust,
- gravity,
- Himalaya,
- isostasy,
- Moho interface,
- Tibetan Plateau

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References(56)

References

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