TITLE:
Assessment of Beshagard Mountain Tectonic Activity (South of Jazmurian Depration) Application IRAT Index
AUTHORS:
Ali Khoddami Atashan, Mohsen Pourkermani, Amir Shafii Bafti, Manouchehr Ghorashi, Soheila Bouzari
KEYWORDS:
Morphometry, Beshagard Mountain, Jiroft Fault. Active Tectonic, IRAT Index
JOURNAL NAME:
Open Journal of Geology,
Vol.7 No.3,
March
24,
2017
ABSTRACT:
Morphometry status of tectonic active areas around the Beshagard mountain
is as a result of the interaction of neotectonic movements, erosion
and subsidence processes. Bashagard mountain contains two attached mountains (GhaleTohi imountain
and Bashagard mountain) with an altitude of 2000 meters at the south of the
Jazmurian subsidence surrounded by Quaternary and Neogene. The
boundary between the north Makran and Jazmurian subsidence is a fault that
located between Band-e-Ziarat unit and western alluvial fan and units of Ganj,
Mokhtarabad and Rameshk in the south. Tectonic
activity has a significant impact on their morphometry status and drainage
basin system. We studied geomorphological patterns of drainage and mountain fronts
features for clear changes and high style of mountain. In this
study, we studied seven geomorphological indicators for each basin including Vf, Bs, Smf, Sl, Af, RA, Hi between
west and south mountain front of Jazmurian. Morphometric indexes were divided
in three categories. The average of seven indicators is an index of relative
tectonic activity (IRAT). The
level of tectonic activity of each IRAT category was determined. Finally, tectonic
activity was evaluated for each drainage basin. Results show good similarity
between IRAT category and ratio of
tectonic activity of the number of drainage basins. The
streams profile shows the uplift movement in the western part of subsidence
Jazmurian. Thus, the achievements obtained from the analysis of topographic indices, the
region’s river system and geomorphological evidence show the movements of uplift
and movement of right-lateral strike-slip of Jiroft fault in the west and
reverse faulting of Kranj and Jazmurian faults at east of subsidence Jazmurian
that all indicates the diagonal tectonic movements.