Structural evolution of the Kangra recess, Himachal Himalaya: a model based on magnetic and petrofabric strains

Dubey, Ashok Kumar; Bhakuni, S. S.; Selokar, A.D.

doi:10.1016/j.jseaes.2003.11.002

Cited by 28 publications

(18 citation statements)

References 17 publications

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“…Several related studies have been carried out in the foothills of the NW Himalayas, for example: geological (Medlicott, 1864;Pilgrim, 1913;Heron,1937;Khan,1963, 1964;Sahni and Mathur,1964;Khan, 1970), geomorphological (Nossin, 1971;Nakata, 1972;Mukerji, 1976Mukerji, , 1990, neotectonic/active tectonic/morphotectonic (Thakur, 1992;Rao, 1993;Valdiya,1993;Thakur and Pandey, 2004a, b;Delcaillau et al, 2006), seismic (Wesnousky et al, 1999;Kumar et al, 2006), and structural (Dubey et al, 2001(Dubey et al, , 2004Mishra, 2004, 2005). However, only a few studies have focused on landscape development, conjunctively with the underlying relationship between landscape and structures (e.g., Nakata, 1972;Mukerji, 1976Mukerji, , 1990Thakur and Pandey, 2004b;Delcaillau et al, 2006;Malik and Mohanty, 2007).…”

Section: Introductionmentioning

confidence: 99%

The Pinjaur dun (intermontane longitudinal valley) and associated active mountain fronts, NW Himalaya: Tectonic geomorphology and morphotectonic evolution

Singh

Tandon

2008

Geomorphology

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Section: Introductionmentioning

confidence: 99%

The Pinjaur dun (intermontane longitudinal valley) and associated active mountain fronts, NW Himalaya: Tectonic geomorphology and morphotectonic evolution

Singh

Tandon

2008

Geomorphology

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“…The details of regional geology, evolution of structural features and associated magnetic fabrics were discussed earlier by Dubey et al (2004). Some of the new sites close to the oblique ramp, selected especially for their comparison with Dehradun recess, are described here (Figs.1c and d and Table 2).…”

Section: Kangra Recessmentioning

confidence: 95%

“…fig. 8 in Dubey et al, 2004) and a sub-parallel obliqueslip right lateral fault (E2) occur further east of the area. The western side of the MBT (frontal ramp) is characterized by three subsidiary thrusts, i.e.…”

Section: Dehradun Recessmentioning

confidence: 99%

“…Gupta and Gupta, 1995;Mandal et al 2002;Devrani and Dubey, 2009). The detailed description of evolution of structural features formed and encountered in the area can be found in Dubey et al (2004) and Jayangondaperumal and Dubey (2001). The inferences are made on the basis of field investigations and model deformation experiments (Dubey, 1997;Dubey, 2004;Dubey and Jayangondaperumal, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Structural and magnetic fabric studies of recess structures in the western Himalaya: Implications for 1905 Kangra earthquake

2010

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Kinematic information from deformation structures and magnetic fabrics are used to infer recent tectonics around Kangra and Dehradun recesses, western Himalaya. Three types of magnetic fabrics (Type I & II, III, and IV) are identified based on the angle between K3 axis and bedding pole. It was observed that Kangra recess shows more mature fabric type IV as compared to Dehradun recess, where orientation of K3 axes and tectonic fabric reveals dominance of superposed deformation. In the vicinity of Dehradun recess, normal faults occur in un-indurated Quaternary fan deposits confirming their recent formation. The observations are in conformity with earlier studies that during the 1905 Kangra earthquake, the Main Boundary Thrust (MBT) (or one of its subsidiary thrusts) near Kangra showed thrusting whereas the MBT near Dehradun underwent either normal faulting or post seismic adjustments characteristic of normal faulting. The thrusting could be a result of subsurface processes whereas the normal faulting was a result of prevailing surface strains.

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“…In reality, the major contention is represented by the geometry of the MHT and particularly whether the lateral variation is due to a lateral ramp [Dubey et al, 2004] or a smooth surface. Also there is no expression of recesses and salient in the HFT and so it seems plausible that whatever be the case the MBT does not have a strong control on the accretionary wedge width.…”

Section: Critical Taper Model: Possible Scenariosmentioning

confidence: 99%

The sub‐Himalayan fold‐thrust belt in the 1905 Kangra earthquake zone: A critical taper model perspective for seismic hazard analysis

2012

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[1] We investigate the broader epicentral area of the M = 7.8, 1905 Kangra earthquake(s), north India, affecting the sub-Himalayan hills. The tectonics of the area is characterized by two major rentrants (Kangra and Dehradun) interposed by the Nahan Salient. The first-order topography between the Himalayan Frontal Thrust and the Main Boundary Thrust shows a marked lateral variation along strike of the mean gradient, characterized by a very small mean slope angle ($1 ) in correspondence with the reentrants and higher values ($3 ) in the salient. These tectonic and topographic features also show a good correspondence with the peculiar macroseismic field of the 1905 event(s), which is characterized by two distinct intensity maxima, separated by a distance of $150 km, clearly overlapping the two major tectonic reentrants. In this paper, based on available geological and geophysical information and a critical analysis of the general mechanical constraints, the seismogenic volume of the external sector of the chain is investigated in terms of critical taper model attempting to clarify the possible correlations between tectonics, topography and seismicity in the sub-Himalayan belt. Based on different assumptions, three possible seismotectonic scenarios are explored in order to constrain their likelihood and therefore to suggest a potential seismic gap in the area corresponding to the Nahan Salient, which may experience an event of significant magnitude in the future.

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Structural evolution of the Kangra recess, Himachal Himalaya: a model based on magnetic and petrofabric strains

Cited by 28 publications

References 17 publications

The Pinjaur dun (intermontane longitudinal valley) and associated active mountain fronts, NW Himalaya: Tectonic geomorphology and morphotectonic evolution

The Pinjaur dun (intermontane longitudinal valley) and associated active mountain fronts, NW Himalaya: Tectonic geomorphology and morphotectonic evolution

Structural and magnetic fabric studies of recess structures in the western Himalaya: Implications for 1905 Kangra earthquake

The sub‐Himalayan fold‐thrust belt in the 1905 Kangra earthquake zone: A critical taper model perspective for seismic hazard analysis

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