DBPapers

NUMERICAL DEFORMATION MODELLING USING GNSS DATA ON EXTENSIONAL ZONE

AUTHOR/S: A. YURDAKUL, O. PAMUKCU, Z. AKCIG
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 1, 803-808 pp

ABSTRACT

Numerical models which are used for determining deformation are created as a
simplified form of physical reality and they are usually defined as force or timedependent.
The deformation is investigated by static, kinematic and dynamic models.
From these models, dynamic deformation model describes the relationship between the
forces and the changes of forces depending on time and the external factors which cause
deformation.

The deformation in an area is determined by evaluating together the theoretical dynamic
model and GNSS observations of the area. Displacements are defined from the first
measurement time to the last one in the same area by repeated GNSS observations at
regular intervals. Therefore, the deformation of an area can be described using these
displacements. Describing deformation is very important for understanding the
behaviors of time-dependent tectonic movements and estimating risks of earthquake.

In this study, in order to investigate the deformation caused by the influence of force
depending on time, an extension zone is given as an example. A half-graben model is
represented for showing deformation changes depending on time, rheology of an area,
force size and direction. Based on the half-graben model example, a graben from
Western Anatolia which is the most important extensional zone of the world is studied
and the coherence between the displacement obtained from GNSS data and theoretical
deformation model is mentioned.

Keywords: Numerical Deformation Modeling, Extensional zone