Morphometric evidences of neotectonic block movement in Yamuna Tear Zone of Outer Himalaya, India

Srivastava, G. S.; Kulshrestha, A. K.; Agarwal, K. K.

doi:10.1127/0372-8854/2012/0092

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…Morphometric evidences of neotectonic block movement along the transverse fault in the outer Himalaya have also been reported from the Yamuna Tear Zone (Srivastava et al 2013). Deformed Quaternary deposits have been described from various sites in the HFT zone, such as warping, tilting and truncation of fans and terraces and thrusting of the Siwalik rocks over the Quaternary deposits (Valdiya et al 1992;Yeats et al 1992;Goswami et al 2013).…”

Section: Introductionmentioning

confidence: 94%

“…Similar syntaxial bend is also reported from Kotdwar area (Raiverman 2002). The folded nature of the mountain front is also explained by the existence of two transverse faults, i.e., Tanakpur and Kalaunia faults (Valdiya 1976;Goswami 2012;Srivastava et al 2013). Goswami (2012) is of the view that the active Tanakpur and Kalaunia faults represent the rejuvenated basement faults related to Kasganj-Tanakpur-Spur.…”

Section: Seismicity and Lineamentsmentioning

confidence: 99%

“…Goswami (2012) is of the view that the active Tanakpur and Kalaunia faults represent the rejuvenated basement faults related to Kasganj-Tanakpur-Spur. However, Srivastava et al (2013) argued that these transverse faults are lateral ramps or connecting splays and are present throughout the mountain front, giving it a very conspicuous sinuosity.The present observation such as swing in the strike of the bedrock attributes to this spur. The NNE trending folded mountain front measures ∼8 km in width.…”

Section: Seismicity and Lineamentsmentioning

confidence: 99%

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Landforms along transverse faults parallel to axial zone of folded mountain front, north-eastern Kumaun Sub-Himalaya, India

2017

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The shape of the frontal part of the Himalaya around the northeastern corner of the Kumaun Sub-Himalaya, along the Kali River valley, is defined by folded hanging wall rocks of the Himalayan Frontal Thrust (HFT). Two parallel faults (Kalaunia and Tanakpur faults) trace along the axial zone of the folded HFT. Between these faults, the hinge zone of this transverse fold is relatively straight and along these faults, the beds abruptly change their attitudes and their widths are tectonically attenuated across two hinge lines of fold. The area is constituted of various surfaces of coalescing fans and terraces. Fans comprise predominantly of sandstone clasts laid down by the steep-gradient streams originating from the Siwalik range. The alluvial fans are characterised by compound and superimposed fans with high relief, which are generated by the tectonic activities associated with the thrusting along the HFT. The truncated fan along the HFT has formed a 100 m high-escarpment running E-W for ∼5 km. Quaternary terrace deposits suggest two phases of tectonic uplift in the basal part of the hanging wall block of the HFT dipping towards the north. The first phase is represented by tilting of the terrace sediments by ∼30 • towards the NW; while the second phase is evident from deformed structures in the terrace deposit comprising mainly of reverse faults, fault propagation folds, convolute laminations, flower structures and back thrust faults. The second phase produced ∼1.0 m offset of stratification of the terrace along a thrust fault. Tectonic escarpments are recognised across the splay thrust near south of the HFT trace. The south facing hill slopes exhibit numerous landslides along active channels incising the hanging wall rocks of the HFT. The study area shows weak seismicity. The major Moradabad Fault crosses near the study area. This transverse fault may have suppressed the seismicity in the Tanakpur area, and the movement along the Moradabad and Kasganj-Tanakpur faults cause the neotectonic activities as observed. The role of transverse fault tectonics in the formation of the curvature cannot be ruled out.

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Section: Introductionmentioning

confidence: 94%

Section: Seismicity and Lineamentsmentioning

confidence: 99%

Section: Seismicity and Lineamentsmentioning

confidence: 99%

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Landforms along transverse faults parallel to axial zone of folded mountain front, north-eastern Kumaun Sub-Himalaya, India

2017

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“…Use of satellite imagery and morphometric analysis of SukhRao basin in a NW-SE trending synclinal trough south of Paonta Sahib in Sirmur district of Himachal Pradesh indicate that tectonic blocks have moved, tilted and skewed sinistrally forcing the SE flowing Giri, Bata and SukhRao streams to take sharp southward trend along the segments of the Yamuna tear (Srivastava, et al, 2012). The NE-SW trending syngenetic transverse faults have induced stream piracy through fast erosion.…”

Section: (C) Lesser Himalayan Metamorphic Beltmentioning

confidence: 99%

Tectonics and Evolution of the Himalaya

Jain

Dasgupta²,

Bhargava³

et al. 2016

Proceedings of the Indian National Science Academy

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During the period 2011-2015, scientific investigations in the Himalaya incorporated various geological and geophysical aspects of evolution of this mountain, including sub-surface configuration, structure and metamorphism of the Lesser Himalaya and Himalayan Metamorphic Belt, geochemistry, magmatism, stratigraphy and paleontology of the Paleo-Mesozoic Tethyan sedimentary cover, the Himalayan foreland basins, exhumation, paleoseismology and GPS measurements of convergence rates. Certain remote areas of western Arunachal Pradesh in Kameng were covered for their metamorphism and exhumation. Sm-Nd isochron plot of garnet crystals from the Lesser Himalayan Jutogh Group metamorphics provided a mean regression age of 479.7±8.5 Ma as the timing of its crystallization during an Early Ordovician tectonometamorphic event. High-resolution work on metamorphism of the Lesser and Higher Himalayan belts of Sikkim incorporating P-T-t paths and geochronology of the imbricate zones of the Main Central Thrust provided better insight into their evolution.

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“…Features such as fault scarps, warped and tilted ground, sag ponds, pressure ridges, and offset stream channels may be caused by active faulting (Keller & Pinter, ). Many field‐based studies have been carried out along major thrusts and transverse faults in various parts of the Himalayas in order to decipher ongoing tectonic activity (Agarwal et al, ; Agarwal, Bali, Kumar, Srivastava, & Singh, ; Agarwal, Bali, & Singh, ; Agarwal, Prakash, Nawaz Ali, & Jahan, ; Agarwal & Sharma, ; Bali et al, ; Goswami & Yhokha, ; Luirei & Bhakuni, ; Philip, Bhakuni, & Suresh, ; Prakash, Agarwal, & Sharma, ; Singh & Tandon, ; Srivastava, Kulshrestha, & Agarwal, ; Thakur, ; Valdiya, , , ). Fluvial systems are sensitive to folding, faulting, and regional surface deformation.…”

Section: Introductionmentioning

confidence: 99%

Late Quaternary deformation in parts of the Belt of Schuppen of Dimapur and Peren districts, Nagaland, NE India

et al. 2019

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Geomorphic evidences and geochronology suggest recent tectonic activity in the Belt of Schuppen of Dimapur and Peren districts of Nagaland. Multiple levels of strath terraces forming remarkable geomorphic expressions are observed along the Chathe and Jharnapani river valleys. They indicate episodic uplift of the hanging-wall blocks of the thrust systems. The major lineaments prominently trend parallel to the NE-SW regional thrusts, some being perpendicular or oblique. Active normal faults displacing bedrock and overlying fill sediments point to recent tectonic activity. The parallel and trellis drainage patterns are lineament-controlled. Uplift of the terrain is evident from successive palaeochannels of the Chathe River younging towards the southwest.Three major aggradational phases of the terrace sediments are inferred from optically stimulated luminescence (OSL) chronology, the oldest beginning around 21 ka, the second around 11-7 ka, and the youngest between 3.5 and 1 ka. A sand lens of a tilted strath terrace exposed between Kukidolong and Chumukedima is dated at 7 ka, indicating tectonic events after 7 ka. Five major phases of bedrock uplift/incision have been estimated during 20 ka (0.13 mm/year), 11 ka (0.92 mm/ year), 9 ka (2.29 mm/year), 6 ka (0.67 mm/year), and 1.8 ka (2.6 mm/year). Transverse topographic symmetry and asymmetry factor data suggest tilting towards the NE and SW. Other morphometric indices, such as channel sinuosity, stream length gradient index, valley floor to valley height ratio, and mountain front sinuosity, suggest that the area is tectonically active, which corroborates field observations.

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Morphometric evidences of neotectonic block movement in Yamuna Tear Zone of Outer Himalaya, India

Cited by 15 publications

References 8 publications

Landforms along transverse faults parallel to axial zone of folded mountain front, north-eastern Kumaun Sub-Himalaya, India

Landforms along transverse faults parallel to axial zone of folded mountain front, north-eastern Kumaun Sub-Himalaya, India

Tectonics and Evolution of the Himalaya

Late Quaternary deformation in parts of the Belt of Schuppen of Dimapur and Peren districts, Nagaland, NE India

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