Geomorphometric evidence of an active pop-up structure along the sabzpushan fault zone, Zagros mountains, SW Iran

Abstract

Evaluation of active tectonism by means of geomorphic indices has provided crucial semi-quantitative data for evaluating seismic hazards in a fault zone in a semiarid area of the Zagros Mountains of Iran where tectonic rates are low-to-moderate and there are few Quaternary dates. Quaternary activity along the seismically active but poorly understood Sabzpushan fault zone (SFZ) has been investigated. The SFZ consists of two dextral strike-slip faults, the Zafarabad and Kafari faults. Geomorphic indices including mountain front sinuosity, valley asymmetry factor, hypsometric integral, valley floor width to valley height ratio and stream length gradient index were used to assess the effects of active reverse faults which control the topographic relief and Quaternary activity. Geomorphometric and field evidence reveal that the Quaternary activity and topographic relief of the study area are controlled by two reverse faults, the North and South Sabzpushan reverse faults, which have formed a pop-up structure in the contractional step-over area between the Zafarabad and Kafari dextral strikeslip faults as a consequence of oblique convergence between the Afro-Arabian and Iranian plates accommodated by the North and South Sabzpushan thrust faults.

Keywords

active tectonics / geomorphic indices / Sabzpushan fault zone / pop-up structure / Zagros / Iran

References

Adams J. Contemporary Uplift and Erosion of the Southern Alps, New Zealand. Geological Society of America Bulletin, 1980, 91: 1-114.

Andermann C., Crave A., Gloaguen R., . Connecting Source and Transport: Suspended Sediments in the Nepal Himalayas. Earth and Planetary Science Letters, 2012, 351/352: 158-170.

Authemayou C., Bellier O., Chardon D., . Role of the Kazerun Fault System in Active Deformation of the Zagros Fold-and-Thrust Belt (Iran). Comptes Rendus Geo science, 2005, 337(5): 539-545.

Azañón J. M., Pérez-Peña J. V., Giaconia F., . Active Tectonics in the Central and Eastern Betic Cordillera through Morphotectonic Analysis: The Case of Sierra Nevada and Sierra Alhamilla. Journal of Iberian Geology, 2012, 38(1): 225-238.

Azor A., Keller E. A., Yeats R. S. Geomorphic Indicators of Active Fold Growth: South Mountain-Oak Ridge Anticline, Ventura Basin, Southern California. Geological Society of America Bulletin, 2002, 114(6): 745-753.

Berberian M., King G. C. P. Towards a Paleogeography and Tectonic Evolution of Iran. Canadian Journal of Earth Sciences, 1981, 18(2): 210-265.

Brookfield M. E. The Evolution of the Great River Systems of Southern Asia during the Cenozoic India-Asia Collision: Rivers Draining Southwards. Geomorphology, 1998, 22(3–4): 285-312.

Bruce J., Shyu H., Sieh K., . Geomorphic Analysis of the Central Range Fault, the Second Major Active Structure of the Longitudinal Valley Suture, Eastern Taiwan. Geological Society of America Bulletin, 2006, 118(11–12): 1447-462.

Bull W. B., McFadden L. D. Doehring D. O. Tectonic Geomorphology North and South of the Garlock Fault, California. Geomorphology in Arid Regions. Proceedings of the Eighth Annual Geomorphology Symposium, 1977, 115-138.

Burbank D. W., Anderson R. S. Tectonic Geomorphology. Blackwell Science, 2012

Catto N. Tectonic Geomorphology of Mountains: A New Approach to Paleoseismology. Quaternary International, 2009, 204(1–2): 105-106.

Chen Y. H., Miller J. R., Francis J. A., . Observed and Modeled Relationships among Arctic Climate Variables. Journal of Geophysical Research: Atmospheres, 2003, 108 4799 417.

Cox R. T. Analysis of Drainage-Basin Symmetry as a Rapid Technique to Identify Areas of Possible Quaternary Tilt-Block Tectonics: An Example from the Mississippi Embayment. Geological Society of America Bulletin, 1994, 106 5 571

Delcaillau B., Laville E., Amhrar M., . Quaternary Evolution of the Marrakech High Atlas and Morphotectonic Evidence of Activity along the Tizi N’Test Fault, Morocco. Geomorphology, 2010, 118(3–4): 262-279.

Dumont J. F., Santana E., Vilema W. Morphologic Evidence of Active Motion of the Zambapala Fault, Gulf of Guayaquil (Ecuador). Geomorphology, 2005, 65: 223-239.

El-Hamdouni R., Irigaray C., Fernández T., . Assessment of Relative Active Tectonics, Southwest Border of the Sierra Nevada (Southern Spain). Geomorphology, 2008, 96(1–2): 150-173.

Faghih A., Nourbakhsh A. Appraisal of Relative Tectonic Activity along the Kazerun Fault Zone, Zagros Mountains, Iran: Insight from Spatial Analysis of Geomorphic Indices. Geological Journal, 2014, 50(6): 783-798.

Faghih A., Samani B., Kusky T. M., . Geomorphologic Assessment of Relative Tectonic Activity in the Maharlou Lake Basin, Zagros Mountains of Iran. Geological Journal, 2012, 47(1): 30-40.

Farr T. G., Kobrick M. Shuttle Radar Topography Mission Produces a Wealth of Data. Eos, Transactions American Geophysical Union, 2000, 81 48 583

Font M., Amorese D., Lagarde J. L. DEM and GIS Analysis of the Stream Gradient Index to Evaluate Effects of Tectonics: The Normandy Intraplate Area (NW France). Geomorphology, 2010, 119(3–4): 172-180.

Giaconia F., Booth-Rea G., Martínez-Martínez J. M., . Geomorphic Evidence of Active Tectonics in the Sierra Alhamilla (Eastern Betics, SE Spain). Geomorphology, 2012, 145/146: 90-106.

Giamboni M., Ustaszewski K., Schmid S. M., . Plio-Pleistocene Transpressional Reactivation of Paleozoic and Paleogene Structures in the Rhine-Bresse Transform Zone (Northern Switzerland and Eastern France). International Journal of Earth Sciences, 2004, 93(2): 207-223.

Golonka J. Plate Tectonic Evolution of the Southern Margin of Eurasia in the Mesozoic and Cenozoic. Tectonophysics, 2004, 381(1–4): 235-273.

Gordon R. G. The Plate Tectonic Approximation: Plate Nonrigidity, Diffuse Plate Boundaries, and Global Plate Reconstructions. Annual Review of Earth and Planetary Sciences, 1998, 26(1): 615-642.

Grohmann C. H. Morphometric Analysis in Geographic Information Systems: Applications of Free Software GRASS and R. Computers & Geosciences, 2004, 30(9–10): 1055-1067.

Grohmann C. H., Riccomini C., Alves F. M. SRTMBased Morphotectonic Analysis of the Poços de Caldas Alkaline Massif, Southeastern Brazil. Computers & Geosciences, 2007, 33(1): 10-19.

Gürbüz A., Gürer Ö F. F. Tectonic Geomorphology of the North Anatolian Fault Zone in the Lake Sapanca Basin (Eastern Marmara Region, Turkey). Geosciences Journal, 2008, 12(3): 215-225.

Hack J. T. Stream-Profile Analysis and Stream-Gradient Index. Journal of Research of the U.S. Geological Survey, 1973, 1: 421-429.

International Seismological Cente., 2016. [2016-01-02]. http://www.isc.ac.uk/

Iranian Seismological Cente., 2016}. [2016-01-02]. http://irsc.ut.ac.ir

Joshi P. N., Maurya D. M., Chamyal L. S. Morphotectonic Segmentation and Spatial Variability of Neotectonic Activity along the Narmada-Son Fault, Western India: Remote Sensing and GIS Analysis. Geomorphology, 2013, 180/181: 292-306.

Keller E. A. Wallace R. E. Investigation of Active Tectonics: Use of Surficial Earth Processes. Active Tectonics, Studies in Geophysics, 1986, 136-147.

Keller E. A., DeVecchio D. E. 5.7 Tectonic Geomorphology of Active Folding and Development of Transverse Drainages. Treatise on Geomorphology, 2013, 186: 129-147.

Keller E. A., Pinter N. Active Tectonics: Earthquakes, Uplift, and Landscape, 2002

Keller E. A., Pinter N. Active Tectonics: Earthquakes Uplift and Landscapes, 1996

Lacombe O., Mouthereau F., Kargar S., . Late cenozoic and Modern Stress Fields in the Western Fars (Iran): Implications for the Tectonic and Kinematic Evolution of Central Zagros. Tectonics, 2006, 25(1): 997-999.

Mahmood S. A., Gloaguen R. Appraisal of Active Tectonics in Hindu Kush: Insights from DEM Derived Geomorphic Indices and Drainage Analysis. Geoscience Frontiers, 2012, 3(4): 407-428.

Mayer L. Wallace R. E. Tectonic Geomorphology of Escarpments and Mountain Fronts. Active Tectonics, 1986, 125-135.

Mayer L. Introduction to Quantitative Geomorphology, 1990

Merritts D., Vincent K. R. Geomorphic Response of Coastal Streams to Low, Intermediate, and High Rates of Uplift, Medocino Triple Junction Region, Northern California. Geological Society of America Bulletin, 1989, 101(11): 1373-1388.

Molin P. Geomorphic Expression of Active Tectonics in a Rapidly-Deforming Forearc, Sila Massif, Calabria, Southern Italy. American Journal of Science, 2004, 304(7): 559-589.

Mouthereau F., Lacombe O., Vergés J. Building the Zagros Collisional Orogen: Timing, Strain Distribution and the Dynamics of Arabia/Eurasia Plate Convergence. Tectonophysics, 2012, 532–535: 27-60.

Necea D., Fielitz W., Matenco L. Late Pliocene-Quaternary Tectonics in the Frontal Part of the SE Carpathians: Insights from Tectonic Geomorphology. Tectonophysics, 2005, 410(1–4): 137-156.

National Earthquake Information Cente., 2016. [2016-01-02]. http://earthquake.usgs.gov/contactus/golden/neic.php

Pérez-Peña J. V., Azor A., Azañón J. M., . Active Tectonics in the Sierra Nevada (Betic Cordillera, SESpain): Insights from Geomorphic Indexes and Drainage Pattern Analysis. Geomorphology, 2010, 119(1–2): 74-87.

Pike R. J., Wilson S. E. Elevation-Relief Ratio, Hypsometric Integral, and Geomorphic Area-Altitude Analysis. Geological Society of America Bulletin, 1971, 82 4 1079

Ramírez-Herrera M. T. Geomorphic Assessment of Active Tectonics in the Acambay Graben, Mexican Volcanic Belt. Earth Surface Processes and Landforms, 1998, 23(4): 317-332.

Rockwell T. K., Keller E. A., Johnson D. L. Morisawa M. Tectonic Geomorphology of Alluvial Fans and Mountain Fronts near Ventura, California. Tectonic Geomorphology, 1985, 183-207.

Silva P. G. Evolución Geodinámica de la Depresión del Guadalentín Desde el Mioceno Superior Hasta la Actualidad: Neotectónicay Geomorfología: [Dissertation], 1994

Silva P. G., Goy J. L., Zazo C., . Fault-Generated Mountain Fronts in Southeast Spain: Geomorphologic Assessment of Tectonic and Seismic Activity. Geomorphology, 2003, 50(1–3): 203-225.

Strahler A. N. Hypsometric (Area-Altitude) Analysis of Erosional Topography. Geological Society of America Bulletin, 1952, 63 11 1117

Talbot C. J., Alavi M. The Past of a Future Syntaxis Across the Zagros. Geological Society, London, Special Publications, 1996, 100(1): 89-109.

Talebian M., Jackson J. A Reappraisal of Earthquake Focal Mechanisms and Active Shortening in the Zagros Mountains of Iran. Geophysical Journal International, 2004, 156(3): 506-526.

Tavakoli F., Walpersdorf A., Authemayou C., . Distribution of the Right-Lateral Strike-Slip Motion from the Main Recent Fault to the Kazerun Fault System (Zagros, Iran): Evidence from Present-Day GPS Velocities. Earth and Planetary Science Letters, 2008, 275(3–4): 342-347.

Troiani F., Della Seta M. The Use of the Stream Length-Gradient Index in Morphotectonic Analysis of Small Catchments: A Case Study from Central Italy. Geomorphology, 2008, 102(1): 159-168.

Tsodoulos I. M., Koukouvelas I. K., Pavlides S. Tectonic Geomorphology of the Easternmost Extension of the Gulf of Corinth (Beotia, Central Greece). Tectonophysics, 2008, 453(1–4): 211-232.

Wells S. G., Bullard T. F., Menges C. M., . Regional Variations in Tectonic Geomorphology along a Segmented Convergent Plate Boundary Pacific Coast of Costa Rica. Geomorphology, 1988, 1(3): 239-265.

Zovoili E., Konstantinidi E., Koukouvelas I. K. Tectonic Geomorphology of Escarpments: The Cases of Kompotades and Nea Anchialos Faults. Bulletin of the Geological Society of Greece, 2004, 36: 1716-1725.