Determination of upper crustal velocity structure in North Eastern part of Iran between Kashaf Roud and Binaloud faults

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.

Azhari s.m.; REZAPOUR M.; Mottaghi a.a.

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

Journal Paper

Paper Information

Journal: GEOSCIENCES Year:2018 | Volume:27 | Issue:108 Page(s): 95-104

Download Full-Text

Persian Verion

View:

550

Download:

Cites:

Information Journal Paper

Title

Determination of upper crustal velocity structure in North Eastern part of Iran between Kashaf Roud and Binaloud faults

Author(s)

Azhari s.m. | REZAPOUR M. | Mottaghi a.a. | Issue Writer Certificate

Keywords

Crustal velocity structureQ2

Local Earthquake TomographyQ1

MashhadQ2

Abstract

Northeastern part of Iran islocated in the Koppeh Dagh seismotectonic province. This province is part of the Alpine-Himalayan orogenic belt. In the last two decades, a number of earthquakes occurred in this region. Therefore, investigating and relocating these earthquakes with adequate precise play a great role in seismicity research of the study area. Adequate crustal structure velocity has a key role in relocating the earthquakes. Since the earthquakes in this region are shallow earthquakes, the upper part of crustal structure can be acquired. So in this study, Mashhad and Quchan seismological networks data were used to determine the crustal structure velocity. In order to determine the velocity structure, Vp/Vs was first determined using the methods of Wadati and travel time of1. 72. Then by applying various filters and selection of several earthquakes 1D velocity structure of the arrival times was determined. Results reveal two velocity discontinuities approximately at 4 and 14 km depths. The resulting model consists of a 4-km-thick layer with VP = 5. 9 kms− 1 overlying a 10-km-thick layer with VP = 6. 17 kms− 1. Then the initial 1D velocity model was used to determine the three-dimensional velocity structure using LOTOS code. The results show significant changes in the vicinity of Mashhad. Two zones with higher velocity are observed in the north and south of Mashhad due to Kashaf Roud and Binaloud Faults. In the north of Mashhad, a change in velocity is observed, which might be due to the Tous fault. In the south of Mashhad, a sharp velocity discontinuity at the depth of 4 km is probably due to an alluvium cover above a bedrock of varying thickness. Also, the tomography results indicate that the area of Shandiz fault system in the south of Mashhad is associated with a lower velocity zone compared to its adjacent areas.

Cites

No record.

References

No record.

Cite

APA: Copy

Azhari, s.m., REZAPOUR, M., & Mottaghi, a.a.. (2018). Determination of upper crustal velocity structure in North Eastern part of Iran between Kashaf Roud and Binaloud faults. GEOSCIENCES, 27(108 ), 95-104. SID. https://sid.ir/paper/32548/en

Vancouver: Copy

Azhari s.m., REZAPOUR M., Mottaghi a.a.. Determination of upper crustal velocity structure in North Eastern part of Iran between Kashaf Roud and Binaloud faults. GEOSCIENCES[Internet]. 2018;27(108 ):95-104. Available from: https://sid.ir/paper/32548/en

IEEE: Copy

s.m. Azhari, M. REZAPOUR, and a.a. Mottaghi, “Determination of upper crustal velocity structure in North Eastern part of Iran between Kashaf Roud and Binaloud faults,” GEOSCIENCES, vol. 27, no. 108 , pp. 95–104, 2018, [Online]. Available: https://sid.ir/paper/32548/en

Related Journal Papers