Reply to comments by Ahmad et al. on: Shah, A. A., 2013. Earthquake geology of Kashmir Basin and its implications for future large earthquakes International Journal of Earth Sciences DOI:10.1007/s00531-013-0874-8 and on Shah, A. A., 2015. Kashmir Basin Fault and its tectonic significance in NW Himalaya, Jammu and Kashmir, India, International Journal of Earth Sciences DOI:10.1007/s00531-015-1183-1

2015 ◽  
Vol 105 (2) ◽  
pp. 689-694
Author(s):  
A. A. Shah
Keyword(s):  
Earth Sciences ◽  
Nw Himalaya ◽  
Jammu And Kashmir ◽  
Kashmir Basin ◽  
Tectonic Significance ◽  
Earthquake Geology ◽  
Kashmir Basin Fault ◽  
Large Earthquakes

scholarly journals Pull-apart basin tectonic model is structurally impossible for Kashmir basin, NW Himalaya

2016 ◽  
Author(s):  
A. A. Shah
Keyword(s):  
Strike Slip ◽  
Strike Slip Fault ◽  
Fault System ◽  
Nw Himalaya ◽  
Tectonic Model ◽  
Pull Apart Basin ◽  
Piggyback Basin ◽  
Kashmir Basin ◽  
Dextral Strike Slip Fault ◽  
Dextral Strike Slip

Abstract. Kashmir Basin in NW Himalaya is considered a Neogene-Quatermary piggyback basin that was formed as result of the continent-continent collision of Indian and Eurasian plates. This model however is recently challenged by a pull-apart basin model, which argues that a major dextral strike-slip fault through Kashmir basin is responsible for its formation. And here it is demonstrated that the new tectonic model is structurally problematic, and conflicts with the geomorphology, geology, and tectonic setting of Kashmir basin. It also conflicts, and contradicts with the various structural features associated with a typical dextral strike-slip fault system where it shows that such a major structure cannot pass through the middle of the basin. It is demonstrated that such a structure is structurally, and kinematically impossible, and could not exist.

Lg wave propagation and attenuation characteristics of the NW Himalaya

2021 ◽  
Author(s):  
Kaushik Kumar Pradhan ◽  
Supriyo Mitra
Keyword(s):  
Wave Propagation ◽  
Quality Factor ◽  
Spectral Ratio ◽  
Spectral Amplitude ◽  
Nw Himalaya ◽  
Jammu And Kashmir ◽  
Waveform Data ◽  
Ground Shaking ◽  
Lg Wave ◽  
Attenuation Characteristics

<p>Lg waves are formed by the superposition of shear waves trapped within the crustal waveguide and are the most destructive at regional distances. Excitation of Lg waves, its propagation and lateral variability determine the intensity of ground shaking from regional earthquakes. Spatial decay of spectral amplitude of Lg waves have been used to quantify the attenuation characteristics of the crust. In this study we use regional waveform data from the Jammu and Kashmir Seismological NETwork (JAKSNET) to study Lg wave propagation across the Indian Peninsula, Himalaya, Tibetan Plateau and Hindu Kush regions. We compute Lg/Sn wave ratio to distinguish regions with efficient Lg propagation from those with Lg blockage. These results are categorised using earthquake magnitude and depth to study Lg wave excitation and propagation across these varying geological terrains. We further use the two-station method to study Lg wave quality factor and its frequency dependence for the NW Himalaya. Seismograms recorded at two stations of the network, which are aligned within 15 degrees of the event, are used for analysis. The spectral ratio of Lg wave amplitude recorded at the two stations will be used to estimate the Q (quality factor) as a function of frequency. This will provide Q<sub>0</sub> along all inter-station paths, which will then be combined to form Q<sub>0</sub> tomography maps for the region. Checkerboard tests will be performed to estimate the resolution of the tomographic maps and accordingly the results will be interpreted.</p>

scholarly journals Petrology of the Doda Granites, Jammu Lesser Himalaya, India

1996 ◽  
Vol 14 ◽  
Author(s):  
B. L. Dhar ◽  
A. K. Raina ◽  
B. K. Fotedar ◽  
R. Singh
Keyword(s):  
Partial Melting ◽  
Granitic Rocks ◽  
Crustal Material ◽  
Lesser Himalaya ◽  
Calc Alkaline ◽  
Nw Himalaya ◽  
Jammu And Kashmir ◽  
Lower Crustal ◽  
Highly Evolved

Granitic rocks in the Doda district of Jammu and Kashmir State, NW Himalaya are exposed at eight places. They are named as Dramman, Piparan, Kaplas, Khol Dedni, Chinta, Bhala, Kai Nala, and Nagin Dhar Granites. They occur in the form of irregular bodies of varying dimensions. These granites are mostly leucocratic, two-mica, porphyritic to aplitic, massive and highly jointed with crude foliation in some cases. The contact with the Older Metamorphics is sharp and thermal aureole is absent. These granites are monzo- to syeno-granitic in composition with peraluminous, S-type (equivalent to ilmenite series) and calc-alkaline affinity. These intrusive bodies are emplaced within the Older Metamorphics under tectonic influences at later stages of metamorphism. They have formed from highly evolved anatectic granites derived by partial melting of lower crustal material with diapiric situations. These processes had been operative at a temperature of 600-700°C at a depth of 20-30 km under 5 Kb Pressure. The emplacement of these granites is suggested to be due to transient dilation where the diapir is enhanced by sheeting mechanism.

scholarly journals Tectonogeomorphic investigation of Kashmir Basin NW Himalaya

2021 ◽  
pp. 1-21
Author(s):  
Maqbool Yousuf ◽  
Syed K. Bukhari ◽  
Gulam Rasool Bhat
Keyword(s):  
Nw Himalaya ◽  
Kashmir Basin
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