Neotectonics of Boroujerd Area, SW Iran by Index of Active Tectonics

Abstract

Boroujerd area has located in the border zone of Zagros mountain and Sanandaj-Sirjan belt in the southwest Iran. Six geomorphic indices were calculated in the study area. Through averaging these indices we obtain index of active tectonics (Iat). The values of the index were divided into classes to define the degree of active tectonics. Therefore, relative tectonic activity was calculated and their values were classified and analyzed in two groups. Regions were identified as low and moderate levels. In analyzing data and combining them with tectonic setting the results were often associated and justified with regional geology. Our results show that the highest value has located along faulted area, which shows 3 classes of relative tectonic activity (moderate level). Also, other values have located along folded area (low level). Therefore, middle part of study area (sub-basin No. 4) is showing the more active uplifting related to surroundings region (sub-basin No. 1, 2 and 3). In other words, sub-basin No. 4 has got the more active uplifting by quaternary movements of several faults such as Doroud fault.

Active Tectonics of the Saymareh-Karkheh River Basin (Northwest of Persian Gulf, Iran)

“…Based on previous work on the salt and mud diapirism [11]- [30] and neotectonic regime in Iran [31]- [36], Zagros in south Iran is the most active zone [37]- [76]. Then, Alborz [77]- [123] and Central Iran [124]- [152] have been situated in the next orders. Thus, the study area has been affected by an important regional shortening, but this research tried to evaluate levels of relative tectonic activities in a wider region by using of six geomorphic indices.…”

Active Tectonics of Kangavar Area, West Iran

“…The study area is located between longitudes 47˚30'E -48˚30'E and latitudes 34˚N -35˚N in the Kermanshah province, west Iran. Based on previous work on the salt and mud diapirism [12]- [22] and neotectonics regime in Iran [23]- [28], Zagros in south Iran is the most active zone [29]- [41]. Then, Alborz [42]- [75] and Central Iran [76]- [88] have been situated in the next orders.…”

Active Tectonics of Gülbahçe Fault Zone (GBFZ) by Using Geomorphic Indices, İzmir Province, Western Anatolia, Turkey

“…The geometry of drainage basins can be determined from basin shape indices (Bs) (Cannon 1976, Bull and McFadden 1977, Ramírez-Herrera 1998, El Hamdouni et al 2007, Omidali et al 2015, Saber et al 2018. Bs indice can be defined by the following formula;…”