Discrete element simulations of continental collision in Asia

Atsushi Tanaka; Yoshinori Sanada; Yasuhiro Yamada; Toshifumi Matsuoka; Yuzuru Ashida

doi:10.1071/EG05001

ISSN: 0812-3985
E-ISSN: 1834-7533

Discrete element simulations of continental collision in Asia
Authors Atsushi Tanaka^a, Yoshinori Sanada^b, Yasuhiro Yamada^b, Toshifumi Matsuoka^b and Yuzuru Ashida^b
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^a Sumiko Consultants Co., Ltd, . 9-7, 2-chome, Ikenohata, Taito-ku, Tokyo, , Japan, , 110-0008 Phone: 81-3-3827-6137, Facsimile: 81-3-3827-6147, Email: [email protected] ^b Department of Civil and Earth Resources Engineering, Kyoto University Faculty of Engineering, . Yoshidahonmachi, Sakyo-ku, Kyoto, , Japan, , 606-8501
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 36, Issue 1, Mar 2005, p. 1 - 6
DOI: https://doi.org/10.1071/EG05001
- Received: 26 Jul 2004
- Accepted: 08 Oct 2004
- Published online: 01 Mar 2005

Abstract

Analogue physical modelling using granular materials (i.e., sandbox experiments) has been applied with great success to a number of geological problems at various scales. Such physical experiments can also be simulated numerically with the Discrete Element Method (DEM). In this study, we apply the DEM simulation to the collision between the Indian subcontinent and the Eurasian Plate, one of the most significant current tectonic processes in the Earth.

DEM simulation has been applied to various kinds of dynamic modelling, not only in structural geology but also in soil mechanics, rock mechanics, and the like. As the target of the investigation is assumed to be an assembly of many tiny particles, DEM simulation makes it possible to treat an object with large and discontinuous deformations. However, in DEM simulations, we often encounter difficulties when we examine the validity of the input parameters, since little is known about the relationship between the input parameters for each particle and the properties of the whole assembly. Therefore, in our previous studies (Yamada et al., 2002a, 2002b, 2002c), we were obliged to tune the input parameters by trial and error.

To overcome these difficulties, we introduce a numerical biaxial test with the DEM simulation. Using the results of this numerical test, we examine the validity of the input parameters used in the collision model. The resulting collision model is quite similar to the real deformation observed in eastern Asia, and compares well with GPS data and in-situ stress data in eastern Asia.

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References

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Cundall, P.A., and Strack, O.D.L., 1983, Modeling of microscopic mechanisms in granular material: in Mechanics of granular materials: new models and constitutive relations, Jenkins, J.T., and Satake, M., (eds.), Elsevier, 137-149.
Davy, P., and Cobbold, PR., 1988, Indentation tectonics in nature and experiment. 1. Experiments scaled for gravity: Bulletin of the Geological Institutions of Uppsala, N.S., 14, 129-141.
Matsuoka, T., Hasegawa, T., Yamada, Y., and Ashida, Y, 2001a, Analogue and digital modeling in structural geology: Proceedings of the Recent Advances in Exploration Geophysics, Kyoto, Japan.
Matsuoka, T., Hasegawa, T., Yamada, Y, and Ashida, Y, 2001b, Computer simulation for sandbox experiments: Extended abstract of the Annual meeting, the Society of Exploration Geophysicists, San Antonio, TX, USA.
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Peltzer, G. and Tapponnier, P., 1988, Formation and evolution of strike-slip faults, rifts, and basins during the India-Asia collision: an experimental approach: Journal of Geophysical Research, 93, B12, 15085-15117.
Tapponnier, P., Peltzer, G., Armijo, R., Le Dain, A.Y. and Cobbold, P., 1982, Propagating extrusion tectonics in Asia: new insights from simple experiments with plasticine: Geology, 10, 611-616.
Tapponnier, P., Peltzer, G., and Armijo, R., 1986, On the mechanics of the collision between India and Asia, propagating extrusion tectonics in Asia: in Collision Tectonics, Coward, M.P, and Ries, A.C. (eds.), Geological Society Special Publication, 19, 115-157.
Yamada, Y, Tanaka, A., and Matsuoka, T, 2002a, DEM Simulation of Indentation Tectonics: Continental Collision of Indo-Eurasia: Proceedings of the Recent Advances in Exploration Geophysics, Kyoto, Japan.
Yamada, Y, Tanaka, A., and Matsuoka, T, 2002b, DEM simulation of continental collision; Insights for indentation tectonics in Asia: Bollettino di Geofisica teorica et applicata, 42, 1/2 supplement, 245-249.
Yamada, Y, Atsushi, T, and Matsuoka, T, 2002c, DEM Simulation of Continental Collision in Asia: Abstract of the Fall Meeting, the American Geophysical Union, San Francisco, CA, USA.
Wang, Q., Zhang, P. Z., Freymueller, J, T, Bilham, R., Larson, K, M., Lai, X., You, X., Niu, Z., Wu, J., Li, Y, Liu, J., Yang, Z., Chen, Q., 2001, Present Day Crustal Deformation in China constrained by Global Positioning Measurements: Science, 294, 574-577.

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Article Type: Research Article

Keyword(s): analogue experiment; discrete element method; numerical simulation; tectonics

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Discrete element simulations of continental collision in Asia

Abstract

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