scholarly journals Tectono-stratigraphic evolution of the intermontane Tarom Basin (NW sectors of the Arabia-Eurasia collision zone): insights into the vertical growth of the Iranian Plateau margin

2020 ◽  
Author(s):  
Mohammad Paknia ◽  
Paolo Ballato ◽  
Massimo Mattei ◽  
Ghassem Heidarzadeh ◽  
Francesca Cifelli ◽  
...  
Keyword(s):  
Iranian Plateau ◽  
Vertical Growth ◽  
Collision Zone ◽  
Stratigraphic Evolution

Constraints on the Timing of Surface Uplift of the Iranian Plateau (Arabia-Eurasian Collision Zone) from Clumped Isotope Thermometry on Pedogenic Carbonates

2020 ◽  
Author(s):  
Paolo Ballato ◽  
Alexis Licht ◽  
Katharine Huntington ◽  
Andrew Schauer ◽  
Andreas Mulch ◽  
...  
Keyword(s):  
Global Climate ◽  
Time Interval ◽  
Plate Boundaries ◽  
Order Problem ◽  
Iranian Plateau ◽  
Surface Uplift ◽  
Pedogenic Carbonates ◽  
Collision Zone ◽  
Clumped Isotope ◽  
Orogenic Plateaus

<p>Orogenic plateaus are extensive, elevated, arid, generally internally drained, morphotectonic provinces of low internal topographic relief that represent a striking and enigmatic feature of Earth’s continental landscapes. They are located along convergent plate boundaries and have a profound impact on regional and global climate, erosional processes, local- to far-field deformation mechanisms and the long-term distribution of biomes and biodiversity. Although the paramount role of large orogenic plateaus in shaping our planet is widely appreciated, the question of why, where, and how some orogenic systems develop large plateaus remains a first-order problem in our understanding of lithospheric evolution and orogenic processes.</p><p>Here, we present a clumped isotope paleoaltimetry study to document the elevation history of the Iranian Plateau, with the goal of understanding the rates and mechanisms of orogenic plateau rise. This plateau is in the Arabia-Eurasia collision zone, has a mean elevation of ~ 1.8 km, steep margins with mountain peaks higher than 4 km, and experienced surface uplift sometime after the middle Miocene as documented by the occurrence of ca. 17-My-old marine deposits in the plateau interior.</p><p>Preliminary results from Early Miocene to Quaternary pedogenic carbonates on the plateau interior and the adjacent, less elevated, intermontane Tarom basin suggest that surface uplift must have occurred sometime between 12-11 and 8 Ma. The lack of significant crustal shortening and thickening during this time interval and the occurrence of a renewed phase of adakitic volcanism by ca. 11 Ma suggests that surface uplift may have been driven by deep-seated processes associated with asthenospheric flow.</p>

Slip-sense inversion in Iran: Implications for Eurasian tectonics

2020 ◽  
Author(s):  
Bernard Guest
Keyword(s):  
Structural Evolution ◽  
Sediment Supply ◽  
Process Models ◽  
Fault System ◽  
Free Boundaries ◽  
Iranian Plateau ◽  
Existing Structures ◽  
The North ◽  
Collision Zone ◽  
Late Neogene

<p>The left-lateral Doruneh Fault System (DFS) bounds the north margin of the Central Iranian microplate, and has played an important role in the structural evolution of the Turkish-Iranian Plateau and of Afghanistan. The western termination of the DFS is a sinistral synthetic branch fault array that shows clear kinematic evidence of having undergone recent slip sense inversion from a dextral array to a sinistral array in the latest Neogene or earliest Quaternary. Similarly, kinematic evidence from the Anarak Metamorphic complex at the southwestern most branch of the DFS terminal fault array suggests that this core complex formed at a transpressive left stepping termination and that it was inverted in the latest Neogene to a transtensional fault termination. The recognition that the DFS and possibly other faults in NE Iran were inverted from dextral to sinistral strike slip in the latest Neogene, and the likely connection between the DFS and the Herat Fault of Afghanistan suggests that the evolutions of Afghanistan and the Indo-Asian collisional system are linked to the tectonic evolution of the Turkish-Iranian Plateau. This speculative model explains the Late Neogene tectonic realignment of the Arabia-Eurasia collision zone in terms of the interaction between the Afghan blocks that were extruding west from the Indo-Asian collision and the Turkish Iranian collision zone that was evolving to the east as Arabia sutured diachronously with Eurasia. The collision of the Afghan blocks with East Iran effectively locked the respective eastern and western free boundaries for the Arabia-Eurasia, and Indo-Asian collisional belts and forced them to diverge away from one another.<span> If confirmed,</span> this explains the Late Miocene to Pliocene tectonic reorganization that is recognized across the Middle East and has implications for geologic process models across the region. Regional tectonic reorganization and/or inversion may (1) invert and possibly breach older Cenozoic structures while forming a younger generation of post-Miocene structures, (2) reorganize drainage and sediment supply networks, and sealing and obscuring older structural and stratigraphic bodies under younger sediments, (3) rejuvenate existing structures and trigger secondary fluid migration, and (4) increase exhumation, sediment supply, and subsidence in late Neogene basins across the region.</p>

scholarly journals Petrogenesis of mafic collision zone magmatism: The Armenian sector of the Turkish–Iranian Plateau

2015 ◽  
Vol 403 ◽  
pp. 24-41 ◽  
Author(s):  
Iain Neill ◽  
Khachatur Meliksetian ◽  
Mark B. Allen ◽  
Gevorg Navasardyan ◽  
Klaudia Kuiper
Keyword(s):  
Iranian Plateau ◽  
Collision Zone

Active Tectonics of the Mt. Muşgüneyi: Implications for Western Part of the Turkish Iranian Plateau

2020 ◽  
Author(s):  
Taylan Sançar
Keyword(s):  
Spatial Distribution ◽  
Fault Zone ◽  
Active Tectonics ◽  
Slip Rate ◽  
Tectonic Activity ◽  
Asymmetry Factor ◽  
Mountain Range ◽  
Iranian Plateau ◽  
Collision Zone ◽  
Southern Margin

<p>The Eastern Turkish High Plateau (ETHP) presents one of the most critical areas of Turkish-Iranian Plateau, where active slip rates and kinematics of the faults have been used in models that aim to describe the overall deformation characteristics (such as; the beginning of the collision and convergence velocity) of the Arabian-Eurasian collision. However, lack of the spatial distribution of horizontal slip and rock uplift rates of the Bitlis-Zağros Mountain Range (BZMR) prevent our understandings about active deformation of Turkish-Iranian Plateau. Mt. Muşgüneyi that constitute the NW part of BZMR and southern margin of the ETHP is critically important because conflicting viewpoints related to the active tectonics of both the ETHP, Turkish-Iranian Plateau and Arabian-Eurasian collision zone currently being adopted in research into it. In this study, I extracted spatial distribution of the fault geometry in the Mt. Muşgüneyi and river networks from DEM, satellite images and aerial photo in order to understand faulting mechanism and measure their cumulative offsets, respectively. Geomorphic indexes (mountain-front sinuosity, valley floor width to valley height ratio, transverse topographic symmetry factor, asymmetry factor, hypsometric curve and integral) and drainage pattern analysis (channel concavity, integral analyses and knick point analyses) have been used to isolate the tectonic activity of the region. The results of this study reveal that although dozens of dextral faults accommodate the strain in the region, the 260 km length dextral Kavakbaşı Fault is the most important structure in the NW part of BZMR and it takes 60% of overall deformation. Previous studies suggest that 3–4.5 Ma is needed to account for the measured 9 km cumulative offset in this region, however, I measured c.a. 24 km cumulative horizontal offset on Kavakbaşı Fault that indicates c.a. 12 Ma needed to account for the offset. Morphometric studies point out sustaining significant uplift within the Mt. Muşgüneyi and signify the uplift rate is larger than horizontal slip rate moreover my results contradict the idea that change in the nature of the collision zone 5 ± 2 Ma ago.  Furthermore, I propose that NW part of BZMR is extremely important to understand when the modern configuration of the boundary faults of the Anatolian Scholle did form? Considering similarities between the Kavakbaşı and the Nazımiye fault, which located at c.a. 70 km south of the North Anatolian Fault Zone in the Anatolian Scholle, in terms of their ages, orientations, slip senses and cumulative offset, I suggest that they belonged to the earlier dextral deformation zone along the southern margin of the collision that sinistrally offset by the East Anatolian Fault Zone (EAFZ) about 33±3 km. This offset estimate dived by calculated long-term slip rate of the EAFZ and Na-alkali basaltic activity in the Plio-Pleistocene that emplaced at the eastern part of the Anatolian Scholle yields that age of the EAFZ is 6 Ma. This study supported by TÜBİTAK Project No:115Y684.</p>

Tectono-stratigraphic evolution of Late Cretaceous basins into Veslemøy High, SW Barents Sea

2019 ◽  
Vol 138 (1) ◽  
pp. 1-15
Author(s):  
Luca Samperi ◽  
Kamaldeen Omosanya ◽  
Giorgio Minelli ◽  
Ståle Johansen
Keyword(s):  
Late Cretaceous ◽  
Barents Sea ◽  
Stratigraphic Evolution
Sign in / Sign up

Export Citation Format

Share Document