scholarly journals Discussion on Hundru fall as a knick point, Iharkhand, India

2021 ◽  
Vol 15 (2) ◽  
pp. 44-52
Author(s):  
Malavika Sinha
Keyword(s):  
Shear Zone ◽  
Igneous Rocks ◽  
Longitudinal Profile ◽  
Indian Context ◽  
Singhbhum Shear Zone ◽  
Subarnarekha River ◽  
Knick Point

Subarnarekha River lies in the vicinity to the Ranchi mega lineament zone of Jharkhand State. This river links  the Tamar Porapahar shear zone and North Singhbhum shear zone. The Hundru falls is the sudden and abrupt drop of elevation (longitudinal profile) of upstream of river Subarnarekha. The basic aim of this paper is to assess the Hundru falls as a perfect citation of an upstream knick point in Indian context. This paper covers the knick point formation of upstream of the Subarnarekha river. This upper catchment is more diversified in the terms of metamorphic and igneous rocks. This zone has crossed a long path with diversified lithospheric adjustment with epirogenic upliftment. 

Distribution of radionuclides in surface soils, Singhbhum Shear Zone, India and associated dose

2013 ◽  
Vol 185 (9) ◽  
pp. 7833-7843 ◽  
Author(s):  
A. C. Patra ◽  
S. K. Sahoo ◽  
R. M. Tripathi ◽  
V. D. Puranik
Keyword(s):  
Shear Zone ◽  
Surface Soils ◽  
Singhbhum Shear Zone

Soda-granites from South of Tatanagar, Bihar, India

1966 ◽  
Vol 103 (4) ◽  
pp. 340-351 ◽  
Author(s):  
A. K. Banerji ◽  
A. K. Talapatra
Keyword(s):  
Partial Melting ◽  
Shear Zone ◽  
Confining Pressure ◽  
Residual Liquid ◽  
Copper Sulphide ◽  
Granite Magma ◽  
Singhbhum Shear Zone ◽  
Sudden Release ◽  
Singhbhum Granite

AbstractThe nature and origin of some soda-granites from the western part of the Singhbhum shear zone, Bihar, India, are discussed. These soda-granites are responsible for copper sulphide, apatite-magnetite, and uraniferous mineralization within the shear zone. Earlier workers regarded these rocks as sheared materials representing a portion of the high sodic residual liquid from the neighbouring Singhbhum granite magma. The present work indicates that these rocks are migmatitic in nature and are the products of progressive replacement of pre-existing pelitic and semi-pelitic schists by felspathic materials. Migmatization is essentially post-shearing in age while the Singhbhum granite is pre-shearing in age. The migmatitic materials appear to have been derived by the partial melting of the Singhbhum granite during shearing, particularly in depth, as a result of sudden release of confining pressure consequent upon shearing and generation of heat caused by friction at the base of the shear zone. The resulting liquids, which were albite rich, found easy passage through the shear zone and brought about migmatization and mineralization in its wake.

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