ACTIVE TECTONIC IN THE NORTH OF NORTH TABRIZ FAULT (NTF), IRAN, USING MORPHOMETRY AND KINEMATIC ANALYSIS

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

RAFIEE SHOHREH; ABBASSI MOHAMMAD REZA; SAIDI ABDOLLAH; TABASSI HADI

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING Year:2018 | Volume:4 | Issue:4 Page(s): 1-15

Download Full-Text

Persian Verion

View:

900

Download:

Cites:

Information Journal Paper

Title

ACTIVE TECTONIC IN THE NORTH OF NORTH TABRIZ FAULT (NTF), IRAN, USING MORPHOMETRY AND KINEMATIC ANALYSIS

Author(s)

RAFIEE SHOHREH | ABBASSI MOHAMMAD REZA | SAIDI ABDOLLAH | TABASSI HADI | Issue Writer Certificate

Keywords

NAHAND FAULT

NORTH TABRIZ FAULT (NTF)

GEOMORPHIC INDICES

STRESS TENSOR

ACTIVE TECTONIC

Abstract

The study area is a part of the Alpine-Himalayan orogen. It is formed by the Greater Caucasus Mts., the Lesser Caucasus Mts., the Talesh Mts., the Kura Basin, and the South Caspian Basin.Present-day structures of the study area are controlled by the ongoing collision of the Arabian and African plates with Eurasia. The study area extends over 1342 km2 located in Northwest of Iran, which can be regarded generally as the continuation of structural grain of Lesser Caucasus. However, the existence of rigid block of South Caspian Basin and the different lithology of Azerbaijan including Quaternary volcanic masses such as Sahand and Sabalan has resulted in a complex distribution of deformation in the studied area.Northwest Iran is a region of vigorous inflection, deformation and seismicity situated between two thrust belts namely Lesser Caucasus to the north and the Zagros thrust belt to the south.What is known about Seism tectonics of the area located in north of Tabriz fault is limited to the recent works done by Masson et al. (2006). Using dense GPS, they determined that the deformation in NW Iran is characterized by ~8 mm/yr of right-lateral movement on the North Tabriz fault, and ~8 mm/yr of extension within Talesh Mnt. The duplicate Ahar-Varzeghan earthquake focal mechanisms contradicted the GPS results. Although both main shocks have probable fault planes that strike roughly east–west, it is likely that the mapped surface faulting should be associated with the first main shock because field observations record nearly pure strike-slip motion that would be inconsistent with the transpressional mechanism of the second main shock (Ghods et al., 2015).The fault study of Coopley et al. (2013) introduced three Segments with a length of 400 m. till 8 km. In 2012 August 11 (12: 23 UTC), a moderate earthquake with MW=6.4 (USGS) occurred between Ahar and Varzeghan towns in Azerbaijan Province at northwest of Iran, in a region where there was no major mapped fault or any well-documented historical seismicity. In order to solve this problem, Ghods et al. (2015) have introduced a model to resolve this earthquake focal mechanisms and many active fault earthquake rupture in the range of Ahar - Varzeghan.A combined study of ACTIVE TECTONIC parameters such as GEOMORPHIC INDICES and STRESS TENSOR measurement, allowed to recognize a new fault in the northern part of North Tabriz Fault. In addition to the seismicity of North Tabriz fault, seismicity map of Azerbaijan shows the same distribution ratio in the NW part of the North Tabriz fault. In the absence of active faults, the relation of this seismicity is not known. This study was an attempt to introduce one of the active faults at the North of the North Tabriz fault in order to improve the understanding of seismotectonic characteristic of this area.In order to inquire the relevance between rock rigidity and SL index based on a simplified geological map of the area and field observation, rocks were categorized by their resistance as below: Very low (young alluvial deposits), Low (old alluvial deposits, poorly consolidated conglomerates, marl), moderate (gypsum, gypseous marl), High (limestone, sandstone, dolomite, shale, conglomerate, tuff, schist, flysch sediments), Very high (andesites, trakiandesite, gabbro, dacite) (El Hamdouni et al., 2007).Based on the mentioned category, the distribution map of lithological resistance was obtained using GIS. To assess tectonic activities in the area, GEOMORPHIC INDICES such as: the stream length- gradient index (SL) and hypsometric integral (Hi) have been used to reveal vertical active movements along a particular fault, namely NAHAND FAULT. This fault lying in north of Tabriz fault strikes parallel to it with a length of 168 Km. The combination of morphometric studies and kinematic study show clear vertical movement along NAHAND FAULT. Determination of STRESS TENSOR and GEOMORPHIC INDICES has shown that the NAHAND FAULT is a right-lateral strike-slip with a minor vertical component. Field observations and the inversions of STRESS TENSOR (geologic and seismologic fault kinematics) revealed that the NAHAND FAULT is an active fault, acting in a transpressional tectonic regime, with the Sh-max oriented NW-SE.

Cites

No record.

References

No record.

Cite

APA: Copy

RAFIEE, SHOHREH, ABBASSI, MOHAMMAD REZA, SAIDI, ABDOLLAH, & TABASSI, HADI. (2018). ACTIVE TECTONIC IN THE NORTH OF NORTH TABRIZ FAULT (NTF), IRAN, USING MORPHOMETRY AND KINEMATIC ANALYSIS. BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING, 4(4 ), 1-15. SID. https://sid.ir/paper/265916/en

Vancouver: Copy

RAFIEE SHOHREH, ABBASSI MOHAMMAD REZA, SAIDI ABDOLLAH, TABASSI HADI. ACTIVE TECTONIC IN THE NORTH OF NORTH TABRIZ FAULT (NTF), IRAN, USING MORPHOMETRY AND KINEMATIC ANALYSIS. BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING[Internet]. 2018;4(4 ):1-15. Available from: https://sid.ir/paper/265916/en

IEEE: Copy

SHOHREH RAFIEE, MOHAMMAD REZA ABBASSI, ABDOLLAH SAIDI, and HADI TABASSI, “ACTIVE TECTONIC IN THE NORTH OF NORTH TABRIZ FAULT (NTF), IRAN, USING MORPHOMETRY AND KINEMATIC ANALYSIS,” BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING, vol. 4, no. 4 , pp. 1–15, 2018, [Online]. Available: https://sid.ir/paper/265916/en

Related Journal Papers