Post-Neogene right-lateral strike–slip tectonics at the north-western edge of the Lut Block (Kuh-e–Sarhangi Fault), Central Iran

Nozaem, Reza; Mohajjel, Mohammad; Rossetti, Federico; Seta, Marta Della; Vignaroli, Gianluca; Yassaghi, Ali; Salvini, Francesco; Eliassi, Mohsen

doi:10.1016/j.tecto.2013.01.001

Cited by 32 publications

(55 citation statements)

References 45 publications

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“…This scenario is also in good agreement with most of the kinematic evolution of the main Central Iran faults (Figure ): (a) activation of the N‐S right‐lateral strike‐slip fault of the eastern Iran since the last 5 Ma and associated counterclockwise rotation of the Central Iranian Blocks [ Walker and Jackson , ; Walker and Khatib , ; Nozaem et al ., ]; (b) more recent (Plio‐Quaternary) kinematic shift between left‐lateral to right‐lateral strike‐slip fault in the northern border of Central Iran, especially along the Doruneh fault [ Farbod et al ., ; Calzolari et al ., , ].…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Neogene to Present paleostress field in Eastern Iran (Sistan belt) and implications for regional geodynamics

et al. 2017

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We conducted a stress field analysis of the northern part of the ~700 km long north‐south trending, seismically active Sistan orogenic belt of Eastern Iran formed as a result of the closure of a branch of the Neo‐Tethys during the early Cenozoic. Fault kinematic data reveal drastic changes in the stress regime of Eastern Iran during the late Cenozoic, with three successive directions of compression (σ1), from 90°N during the middle‐late Miocene to 60°N during the late Pliocene and 25°N during the Plio‐Quaternary, thereby evidencing a counterclockwise rotation of about 65° of σ1 in less than 10 Myr. As shown by compilation of paleostress data, Plio‐Quaternary direction of compression in Sistan coincides with the one recorded across the whole of Iran and with present‐day Arabia‐Eurasia convergence direction. This result suggests effective stress transfer from the Zagros collision and that Sistan is at present mechanically coupled and shortened along with the rest of the Iranian crust/lithosphere. By contrast, Miocene compression is markedly different in the Iranian hinterland (e.g., Sistan, Central Iran, and Kopet Dagh) and in the Zagros orogen. This could tentatively be related to the end of Sistan collision and/or to the imprint of active deformation occurring further to the east. The intermediate late Pliocene compression (i.e., 60°N) could correspond to the progressive reorientation of the stress regime, as Sistan gets mechanically coupled to the Zagros collision.

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Section: Interpretation and Discussionmentioning

confidence: 99%

Neogene to Present paleostress field in Eastern Iran (Sistan belt) and implications for regional geodynamics

et al. 2017

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“…In this view, the active DF is interpreted as a thrust‐dominated, segmented, sinistral transpressive fault system. To the south, the Miocene–Pliocene tectonic reorganization is recorded by activation of the dextral NE–SW (Kuh Sahrangi Fault; Nozaem et al, ) and E–W (Kuh Faghan Fault; Calzolari, Rossetti, et al, ; Calzolari et al, ) fault strands, whose activity is documented throughout the Quaternary times (Calzolari, Della Seta, et al, ) (Figure h).…”

Section: Discussionmentioning

confidence: 99%

“…In the Iran region, the tectonic boundaries of the continental blocks that make‐up the hinterland domain of the Zagros convergence zone record a prolonged history of deformation and reactivation since Neoproterozoic times (Bagheri, Madhanifard, & Zahabi, ; Kargaranbafghi, Foeken, Guest, & Stuart, ; Nozaem et al, ; Ramezani & Tucker, ; Rossetti et al, ; Tadayon et al, ; Verdel et al, ). Such tectonic zones are presently dominated by wrench tectonics that accommodates and transfers the intraplate residual convergence transmitted from the collisional boundary across the Central Iran region (the assembly of the tectonic zones known as Central Domain and the Central‐East Iranian Microcontinent [hereafter referred as CEIM]; Figure ) (Khodaverdian, Zafarani, & Rahimian, ; Nilforoushan et al, ; Vernant et al, ; Walpersdorf et al, ), in response to a geodynamic scenario dominated by ~N–S‐directed convergence since at least 52 Ma (Berberian, , ; Berberian & Yeats, ; Jackson, Haines, & Holt, ; McQuarrie et al, ; Nowroozi & Mohajer‐Ashjai, ; Walker & Jackson, ).…”

Section: Introductionmentioning

confidence: 99%

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

et al. 2018

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A better understanding of intraplate deformation requires the knowledge of the space–time scales involved in its development and to decipher possible links with the dynamic evolution of the plate boundaries. Central Iran provides an ideal test site to approach this scientific issue, since it is characterised by a prolonged history of Mesozoic–Cenozoic intraplate deformation that has been interfering with the spatio‐temporal re‐organization of the Zagros convergence zone along the Eurasia plate boundary. This study focus on the Doruneh Fault (DF) region that is considered as the northern mechanical boundary of the Central East Iranian Microcontinent. By combining field investigations with apatite low‐temperature thermochronology, we present a revised tectono‐stratigraphic scenario for the DF region, typified by a punctuated history of fault‐related exhumation, burial and cooling history back to the Upper Cretaceous. When framed at regional scale, these results attest that the Zagros convergence zone, and its hinterland domain were fully mechanically coupled since ca. 40–35 Ma, a time lapse that is here referred as to the onset of continental collision along the Arabia–Eurasia plate boundary. In this scenario, the DF region operated throughout the Cenozoic as a major zone of residual stress accommodation and transfer in the hinterland domain of the Zagros convergence zone. Results of this study also suggest that the tectonic evolution along the Arabia–Eurasia plate boundary was modulated by the plate‐boundary dynamics and by the modes of tectonic reactivation of the intracontinental weak zones of Central Iran and at its tectonic boundaries.

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“…Recent paleomagnetic data provide support for this suggestion [ Mattei et al ., ]. The development of the faults in the prolongation of the Hormuz promontory might have been induced by the northward impingement of the Hormuz promontory into the Iranian crust, as observed in similar contexts in the world [e.g., Tapponnier and Molnar , ], and favored by the existence of inherited NS faults and sutures in this area [e.g., Walker and Khatib , ; Cifelli et al ., ; Nozaem et al ., ].…”

Section: Interpretation and Discussionmentioning

confidence: 99%

“…A number of fault maps have thus been produced. However, those maps either show most of the faults with simplified traces [e.g., Walker and Jackson , ; Walker et al ., ; Meyer and Le Dortz , ; Le Dortz et al ., ; Allen et al ., ; Farbod et al ., ; Nozaem et al ., ] or provide very detailed mapping of isolated faults or local fault sections only [e.g., Walker and Jackson , ; Walker et al ., ; Meyer et al ., ; Walker and Khatib , ; Meyer and Le Dortz , ; Fattahi et al ., ; Allen et al ., ; Farbod et al ., ]. To examine the relationship between major and secondary faults and to properly analyze the GPS data, we need a georeferenced, precise tectonic map that shows all active faults together, major and secondary, in great detail.…”

Section: Overall Organization Of Active Faults In Eastern Iranmentioning

confidence: 99%

Present-day kinematics and fault slip rates in eastern Iran, derived from 11 years of GPS data

Walpersdorf

Manighetti

Mousavi

et al. 2014

J. Geophys. Res. Solid Earth

107

125

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We analyze new GPS data spanning 11 years at 92 stations in eastern Iran. We use these data to analyze the present-day kinematics and the slip rates on most seismogenic faults in eastern Iran. The east Lut, west Lut, Kuhbanan, Anar, Dehshir, and Doruneh faults are confirmed as the major faults and are found to currently slip laterally at 5.6 ± 0.6, 4.4 ± 0.4, 3.6 ± 1.3, 2.0 ± 0.7, 1.4 ± 0.9, and 1.3 ± 0.8 mm/yr, respectively. Slip is right-lateral on the~NS striking east Lut, west Lut, Kuhbanan, Anar, and Dehshir faults and left-lateral on the~EW Doruneh fault. The~NS faults slice the eastern Iranian crust into five blocks that are moving northward at 6-13 mm/yr with respect to the stable Afghan crust at the eastern edge of the collision zone. The collective behavior of the~NS faults might thus allow the Arabian promontory to impinge northward into the Eurasian crust. The~NS faults achieve additional NS shortening by rotating counterclockwise in the horizontal plane, at current rates up to 0.8°/Ma. Modeling the GPS and available geological data with a block rotation model suggests that the rotations have been going on at a similar rate (1 ± 0.4°/Ma) over the last 12 Ma. We identify large strains at the tips of the rotating east Lut, west Lut, and Kuhbanan faults, which we suspect to be responsible for the important historical and instrumental seismicity in those zones.

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Post-Neogene right-lateral strike–slip tectonics at the north-western edge of the Lut Block (Kuh-e–Sarhangi Fault), Central Iran

Cited by 32 publications

References 45 publications

Neogene to Present paleostress field in Eastern Iran (Sistan belt) and implications for regional geodynamics

Neogene to Present paleostress field in Eastern Iran (Sistan belt) and implications for regional geodynamics

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

Present-day kinematics and fault slip rates in eastern Iran, derived from 11 years of GPS data

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