TITLE:
Seismic Activity and Fractal Geometry of Kareh Bas Fault System in Zagros, South of Iran
AUTHORS:
Mehran Arian, Hamideh Noroozpour
KEYWORDS:
Fractal, Fault, Kareh Bas, Zagros, Transverse, Iran
JOURNAL NAME:
Open Journal of Geology,
Vol.5 No.5,
May
13,
2015
ABSTRACT: Kareh Bas is one the
transverse fault systems in Zagros fold-thrust belt. Kareh Bas Transcurrent
Fault System with a total length of 200 Km is situated about 80 Km east of the
Borazjan segment (a part of Kazerun fault zone) and 40 Km west of Shiraz. It is a nearly N-S trending right-lateral linked strike-slip
fault system, and several anticlinal axes have been displaced by it. Strike
separation (109 Km) of Mountain Front Fault/Flexure (MFF) of Zagros is the most
important function of Kareh Bas Transcurrent Fault System. According to fractal analysis (Box-counting method) on space
image maps (1:50,000) prepared from Spot data, fault related surface ruptures
have non-linear patterns and fault segments have nearly plane form fractal
dimensions; specially at north and south terminations. It means that, the north
and south terminations of Kareh Bas Transcurrent Fault System are active
(earthquake fault segments) and latter case is more active, because it is
coinciding on Zagros mountain front faults (MFF).