TITLE:
The Elements of Fold Style Analysis in the Khaftar Anticline, Zagros, Iran
AUTHORS:
Zahra Maleki, Mehran Arian, Ali Solgi, Mohammad Ali Ganjavian
KEYWORDS:
Zagros; Iran; The Khaftar Anticline; Fold Style Elements; Nezamabad Fault
JOURNAL NAME:
Open Journal of Geology,
Vol.4 No.3,
March
31,
2014
ABSTRACT: The Study area is located
in the Zagros Simply Folded Belt of Iran and in the interior Fars sub-basin.
The Khaftar anticline is located in the West, North-West of Jahrom city in the
Fars province (148 km distance from Persian Gulf). The trend of Khaftar
anticline has three orientations, consist of North-Northeast, East-West and
South-Southwest. This anticline has asymmetric structure and some faults with
large strike separation observed in this anticline. In the study area,
stratigraphic units are affected by many faults in this area. Also one salt
plug cropping out in the middle part of the Khaftar anticline. Maybe this salt
plug affected on the stratigraphic units and geometry of structure. Description
of fold geometry is important because it allows comparisons within and between
folds and allow us to recognize patterns in the occurrence and distribution of
fold systems. The main aim of this paper is determination of fold style elements
and folding pattern of the Khaftar anticline. This paper presents a part of the
results of a regional study of the Fars province in the Zagros Simply folded
belt, based on satellite images, geological maps, and well data. Some data,
such as geological maps and geological regional data were prepared and provided
by the National Iranian Oil Company (NIOC). Because
of the Khaftar anticline, has complex structure, the analysis of fold style
elements is seems necessary. Therefore, in further studies on this structure
the changes of fold style elements will be analyzed and investigated from east
to west in the different parts of this anticline. The activity of Nezamabad
sinistral strike slip fault in the Khaftar anticline causes changes of axial
plane characteristics and fold axis. Some of the results such as folding style
analysis, how position of salt plug, changes of fold type and main structural
changes (rotation of fold axis and 2.5 km displacement in this anticline) show
main changes in the middle parts of the Khaftar anticline. It seems that, these
changes have formed by activity of the Nezamabad fault and this fault’s
activity same as fault zone.