Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition
Quantitative understanding of stress transfer between major fault systems can elucidate the kinematics of large-scale plate interactions. This study analyzed right-lateral strike-slip motion on the North Tabriz fault (NTF) in an area where this structure appears to transition into a thrust fault kno...
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| Format: | Article |
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IEEE
2017-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
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| Online Access: | https://ieeexplore.ieee.org/document/7563424/ |
| _version_ | 1818647809374552064 |
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| author | Zhe Su Er-Chie Wang Jyr-Ching Hu Morteza Talebian Sadra Karimzadeh |
| author_facet | Zhe Su Er-Chie Wang Jyr-Ching Hu Morteza Talebian Sadra Karimzadeh |
| author_sort | Zhe Su |
| collection | DOAJ |
| description | Quantitative understanding of stress transfer between major fault systems can elucidate the kinematics of large-scale plate interactions. This study analyzed right-lateral strike-slip motion on the North Tabriz fault (NTF) in an area where this structure appears to transition into a thrust fault known as the North Mishu fault (NMF). These faults play an important but cryptic role in accommodating stress related to the Arabia-Eurasia plate collision. We analyzed regional velocity vectors from permanent and temporary GPS arrays to estimate changes in fault-parallel and fault-normal slip rates in the transition zone between the NTF and NMF. Independent of its compressional motion, the NMF exhibits a dextral strike-slip rate of ~2.62 mm/yr. Along the NTF, the right-lateral slip rate decreases and the vertical slip rate on increases at rates of 0.08 and 0.38 mm/yr km, respectively, as the NTF approaches the NMF. This study also used small baseline (SBAS) PS-InSAR results to reveal a NE-SW-striking reverse fault and a developing syncline hidden beneath the Tabriz Basin. Additionally, we calculated the vertical displacement rates using horizontal vectors from the GPS data and mean line-of-sight rate estimates from the SBAS data. While the study area does not express large-scale extrusion, such as that observed in the Anatolian Plate, the transformation of strike-slip motion into thrusting and crustal shortening along the NMF-NTF fault zone accommodates most of the N-S compression affecting the northwestern Iranian Plateau. In this region, small-sized, right-lateral strike-slip faults, and other folded structures form horsetail features. These dispersed structures accommodate eastward extrusion of the northwestern Iranian Plateau. |
| first_indexed | 2024-12-17T01:08:26Z |
| format | Article |
| id | doaj.art-f1f41308b300451db143605b2f555f40 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-12-17T01:08:26Z |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-f1f41308b300451db143605b2f555f402022-12-21T22:09:13ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352017-01-0110113014410.1109/JSTARS.2016.25867427563424Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS DecompositionZhe Su0https://orcid.org/0000-0002-5036-8220Er-Chie Wang1Jyr-Ching Hu2Morteza Talebian3Sadra Karimzadeh4Institute of Geology and Geophysics, State Key Laboratory of Lithospheric Evolution, Chinese Academy of Sciences, Beijing, ChinaInstitute of Geology and Geophysics, State Key Laboratory of Lithospheric Evolution, Chinese Academy of Sciences, Beijing, ChinaDepartment of Geosciences, National Taiwan University, TaipeiResearch Institute for Earth Science, Geological Survey of Iran, Tehran, IranFaculty of Environmental Design, Kanazawa University, Kanazawa, JapanQuantitative understanding of stress transfer between major fault systems can elucidate the kinematics of large-scale plate interactions. This study analyzed right-lateral strike-slip motion on the North Tabriz fault (NTF) in an area where this structure appears to transition into a thrust fault known as the North Mishu fault (NMF). These faults play an important but cryptic role in accommodating stress related to the Arabia-Eurasia plate collision. We analyzed regional velocity vectors from permanent and temporary GPS arrays to estimate changes in fault-parallel and fault-normal slip rates in the transition zone between the NTF and NMF. Independent of its compressional motion, the NMF exhibits a dextral strike-slip rate of ~2.62 mm/yr. Along the NTF, the right-lateral slip rate decreases and the vertical slip rate on increases at rates of 0.08 and 0.38 mm/yr km, respectively, as the NTF approaches the NMF. This study also used small baseline (SBAS) PS-InSAR results to reveal a NE-SW-striking reverse fault and a developing syncline hidden beneath the Tabriz Basin. Additionally, we calculated the vertical displacement rates using horizontal vectors from the GPS data and mean line-of-sight rate estimates from the SBAS data. While the study area does not express large-scale extrusion, such as that observed in the Anatolian Plate, the transformation of strike-slip motion into thrusting and crustal shortening along the NMF-NTF fault zone accommodates most of the N-S compression affecting the northwestern Iranian Plateau. In this region, small-sized, right-lateral strike-slip faults, and other folded structures form horsetail features. These dispersed structures accommodate eastward extrusion of the northwestern Iranian Plateau.https://ieeexplore.ieee.org/document/7563424/GPS velocity decompositionnorthwestern Iranian Plateausmall baseline PS-InSARstress transfer at fault terminations |
| spellingShingle | Zhe Su Er-Chie Wang Jyr-Ching Hu Morteza Talebian Sadra Karimzadeh Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing GPS velocity decomposition northwestern Iranian Plateau small baseline PS-InSAR stress transfer at fault terminations |
| title | Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition |
| title_full | Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition |
| title_fullStr | Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition |
| title_full_unstemmed | Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition |
| title_short | Quantifying the Termination Mechanism Along the North Tabriz-North Mishu Fault Zone of Northwestern Iran via Small Baseline PS-InSAR and GPS Decomposition |
| title_sort | quantifying the termination mechanism along the north tabriz north mishu fault zone of northwestern iran via small baseline ps insar and gps decomposition |
| topic | GPS velocity decomposition northwestern Iranian Plateau small baseline PS-InSAR stress transfer at fault terminations |
| url | https://ieeexplore.ieee.org/document/7563424/ |
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