Active faults of the Himalaya of India and Nepal

Nakata, Takashi

doi:10.1130/spe232-p243

Cited by 297 publications

(273 citation statements)

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“…Evidence for recent deformation was found at various localities along the MFT, within the Sub-Himalaya, along the MBT or in the LH [Nakata, 1989;Mugnier et al, 1994]. Active thrusting in the upper crust along or close to the MCT might explain the present morphology of the front of the HH.…”

Section: Active Tectonics In the Himalayas Of Central Nepal And Lts Rmentioning

confidence: 94%

Fluvial incision and tectonic uplift across the Himalayas of central Nepal

Lavé¹,

Avouac²

2001

J. Geophys. Res.

712

672

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Abstract. The pattern of fluvial incision across the Himalayas of central Nepal is estimated from the distribution of Holocene and Pleistocene terraces and from the geometry of modem channels along major rivers draining across the range. The terraces provide good constraints on incision rates across the Himalayan frontal folds (Sub-Himalaya or Siwaliks Hills) where rivers are forced to cut down into rising anticlines and have abandoned numerous strath terraces. Farther north and upstream, in the Lesser Himalaya, prominent fill terraces were deposited, probably during the late Pleistocene, and were subsequently incised. The amount of bedrock incision beneath the fill deposits is generally small, suggesting a slow rate of fluvial incision in the Lesser Himalaya. The terrace record is lost in the high range where the rivers are cutting steep gorges. To complement the terrace study, fluvial incision was also estimated from the modem channel geometries using an estimate of the shear stress exerted by the flowing water at the bottom of the channel as a proxy for river incision rate. This approach allows quantification of the effect of variations in channel slope, width, and discharge on the incision rate of a river; the determination of incision rates requires an additional lithological calibration.

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Section: Active Tectonics In the Himalayas Of Central Nepal And Lts Rmentioning

confidence: 94%

Fluvial incision and tectonic uplift across the Himalayas of central Nepal

Lavé¹,

Avouac²

2001

J. Geophys. Res.

712

672

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“…Late Quaternary motion along MBT is characterised by right-lateral and down to the north motion. The best expressed late Quaternary faulting in the Lesser and Higher Himalayas extends from the Bari Gad fault to the Darma fault [Nakata, 1989;Yeats and Lillie, 1991] and is on the S.E. projection of the right lateral Karakorum Fault zone (KF).…”

Section: Structural and Neotectonic Pattern Of Western Nepalmentioning

confidence: 99%

“…Quaternary faulting in western Nepal occurred along the thrust splay of the Siwaliks or has reactivated major faults [Nakata, 1989] such as the Main Boundary Thrust (MBT). The direction of motion along the active thrust splay is nearly perpendicular to the trend of the belt and the convergence rate in the Outer belt south of MBT, deduced from the uplift of Holocene terraces, is of the order of 18 +/-4 mm/year in western Nepal [Leturmy, 1997], and 21.5 +/-2.5 mm/year in central Nepal [Lay6 and Avouac, 1998].…”

Section: Structural and Neotectonic Pattern Of Western Nepalmentioning

confidence: 99%

Oblique convergence in the Himalayas of western Nepal deduced from preliminary results of GPS measurements

Jouanne

Mugnier

Pandey³

et al. 1999

Geophysical Research Letters

110

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“…Tectonically, the MBT and MFT are shown to be more active than the MCT to the north due to their thrust and imbrication structure. The MHT reaches the surface at the MFT (Nakata 1989). The seismogenic Lamjung fault may lie along the MBT or MFT.…”

Section: Tectonics and Setting Of Receiver Faultsmentioning

confidence: 99%

“…The pattern of coupling on the MHT is computed on a fault dipping 10°to the north and whose strike roughly follows the arcuate shape of the Himalayas (Ader et al 2012). The MHT reaches the surface at the MFT (Nakata 1989) (Fig. 3), and the MHT is actually locked at the surface and roots about 100 km to the north of the MFT into a subhorizontal shear zone, which is probably thermally enhanced ductile flow (Cattin and Avouac 2000).…”

Section: Normal Fault Systems Riskmentioning

confidence: 99%

Investigation of Coulomb stress changes in south Tibet (central Himalayas) due to the 25th April 2015 M W 7.8 Nepal earthquake using a Coulomb stress transfer model

Cheng

Meng

2016

Earthq Sci

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After M W 7.8 Nepal earthquake occurred, the rearrangement of stresses in the crust commonly leads to subsequent damaging earthquakes. We present the calculations of the coseismic stress changes that resulted from the 25th April event using models of regional faults designed according to south Tibet-Nepal structure, and show that some indicative significant stress increases. We calculate static stress changes caused by the displacement of a fault on which dislocations happen and an earthquake occurs. A M W 7.3 earthquake broke on 12 May at a distance of * 130 km SEE of the M W 7.8 earthquake, whose focus roughly located on high Coulomb stress change (CSC) site. Aftershocks (first 15 days after the mainshock) are associated with stress increase zone caused by the main rupture. We set receiver faults with specified strikes, dips, and rakes, on which the stresses imparted by the source fault are resolved. Four group normal faults to the north of the Nepal earthquake seismogenic fault were set as receiver faults and variant results followed. We provide a discussion on Coulomb stress transfer for the seismogenic fault, which is useful to identify potential future rupture zones.

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Active faults of the Himalaya of India and Nepal

Cited by 297 publications

References 0 publications

Fluvial incision and tectonic uplift across the Himalayas of central Nepal

Fluvial incision and tectonic uplift across the Himalayas of central Nepal

Oblique convergence in the Himalayas of western Nepal deduced from preliminary results of GPS measurements

Investigation of Coulomb stress changes in south Tibet (central Himalayas) due to the 25th April 2015 M W 7.8 Nepal earthquake using a Coulomb stress transfer model

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