TITLE:
Comparison of Strain Ellipsoid Shape in the South of Ardabil Range (NW), Based on the Results of the Magnetic Susceptibility Anisotropy and Paleostress Methods
AUTHORS:
Ramin Sadeghi, Abdollah Saeedi, Mehran Arian, Manochehr Ghorashi, Ali Solgi
KEYWORDS:
Paleostress, Anisotropy, Inversion Method, Strain Ellipsoid, Iran
JOURNAL NAME:
Open Journal of Geology,
Vol.5 No.9,
September
21,
2015
ABSTRACT: In recent years, the
method of magnetic survey as one of the new techniques in geological and
geophysical studies is known. In this study to determine the shape of the
stress field of the two methods, Anisotropy of Magnetic Susceptibility (AMS)
and paleostresshave been used.
Paleomagnetism is the characteristics of magnetic rocks. Some issues in associated
with the past places of continental and oceanic plates can be solved. AMS is
one of the paleomagnetism methods that pay to measurement of parameters (which
are reflector of the magnetic fabrics rocks). It is presenting an ellipsoid
with three-axis perpendicular to each other that defines magnetic ellipsoid. In
this regard, the number of 12 stations in different rocks (Jurassic to
Quaternary) in the southern region of Ardebil sampling was conducted. In this
connection, the study of magnetic fabrics has shown an elliptical magnetic
susceptibility with the prolate shape. For the separation of paleostress phases
in the Khalkhal area using the analysis of the paleostress based on the study
of heterogeneous fault-slip data and sliding lineaments. Firstly, data were
picked from 10 stations, and after their analysis, the elliptical shape (prolate)
has been determinated. The shape of the ellipsoid, based on AMS and paleostress
methods and their results show that in both methods the shape of the stress
field is prolate.