eaments 
eaments 
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p joints 
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IAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring”, Hyderabad, India, 2002 
  
N50°E-S50°W (the maximum Principal compressive stress 
direction, 61B). These lineaments can be correlated with 
NW-SE plunging regional folds (Phase II) of Saklani 
[(1971,b in Garhwal] and Bhattacharya and Niyogi [(1971 in 
Simla)] and thrusts (NAT, MCT-III etc.) and faults (ie, 
Gadolia tear fault) produced during this phase of 
deformation. 
The maxima of N-S lineaments (like Syalam fault, Rano 
fault, Jalkur fault and Tehri fault) along N10°E-S10°W 
indicates the direction of least compressive stress (03C) 
during their development. The minor lineaments were 
generated along N70°E-S70°W and S50°E-N50°W. The 
major N-S lineaments can be correlated with N-S and N-NE 
plunging folds (Phase III) of Merh (1966 in Kumaon) and 
Saklani [(1970 in Garhwal)]. 
The major lineaments produced along N55?E-S55?W (e.g., 
Dewal fault, Raunsal fault, Bhaldiyana fault, Sainj fault) 
indicates that the maximum Principal compressive stress 
(01D) was acting along N55°W-S55°E. Minor lineaments 
were generated around N85°W-S85°E and N25°W- S25°E. 
The major lineaments can be correlated with N-S and NE- 
SW folds(Phase IV) of Saklani 1971, b). 
Bharktya and Gupta (1982) based on lineament tectonic 
interpretation in the Garhwal-Kumaon Himalaya inferred 
that lineaments were generated due to stress with maximum 
Principal compressive stress directed along N30°E-S30°W. 
It is to remark that the development of all the lineaments 
due to stresses from a constant direction is not possible 
because of polyphase deformation in the Lesser Himalayan 
terrain. The lineaments in the Tehri-Uttarkashi region were 
produced during different phases of regional deformation 
and tectonics. Apart from concentrating in few preferred 
directions, the lineaments are also oriented in few other 
directions. This is possibly due to the change in the 
orientation of maximum Principal compressive stress during 
a single as well as subsequent deformation. Also the 
lineaments formed earlier were rotated to a certain extent 
during subsequent phases of folding. 
1.7 CONCLUSIONS 
There are 1096 lineaments present in various litho-tectonic 
blocks of the area and they exhibit four prominent trends viz. 
N55?E-S55?W, N50°W-S50°E, N90°E-S90°W and N10°E- 
S10°W. The majority of the lineaments are represents the 
conjugate sets of joints/ fractures produced due to region 
deformation. A number of lineaments are related to major 
thrusts/faults while few represents the major anticlinal and 
485 
synclinal axial plane of the megascopic folds developed 
during different phases of regional deformation and 
tectonics during Himalayan orogeny. 
1.8 REFERENCES 
Bharktya, D.K. and Gupta, R.P. (1982). Lineament tectonic 
interpretation from LANDSAT images in Garhwal Himalaya. 
Him. Geol., vol, 12, pp. 1-11. 
Bhattacharya, S.C. and Niyogi, D. (1971). Geologic evolution 
of the Krol Belt in Simla Hills, H.P., Him. Geol. 
1, 178-212. s 
Khattri, K.N., Chandra, R., Gaur., V.K., Sarkar, I. and Kumar, 
S. (1989). New Seismological results on tectonics of Garhwal 
Himalaya. Proc. Ind. Acad, sci. (Earth planet Science) 98 (1). 
Merh, S.S. (1966). A preliminary note on the structural history 
of Central Kumaon Himalayas, Bull. Geol. Soc. Ind., 5, 1-7. 
Naha, K. and Ray. S. (1970). Metamorphic history of the 
Jutogh Series in the Simla klippe, Lower Himalaya. 
Contr. Mineral and Petrol. 20, 117-184, Berlin. 
Saklani, P.S. (1970). Metamorphism in rocks of Garhwal 
Himalaya. Jour. Geol. Soc. Ind., 23, pp. 263-266. 
Saklani, P.S. (1971, b). Structure and tectonics of Pratapnagar 
area, Garhwal Himalaya. Him. Geol., 1, pp. 75-91. 
Saklani, P.S. (1993). Geology of the Lower Himalaya 
(Garhwal). Intl. Books and Periodicals Supply Services 
New Delhi. 
Virdi, N.S. (1979). On the geodynamic significance of 
mega-lineaments in the Outer and Lesser regions of 
Himalaya. Him. Geol. 9 (1), pp-79-99. 
1.9 ACKNOWLEDGEMENTS 
Author* is thankful to Prof. P.S.Saklani for guidance in writing 
the paper by providing relevant information on structural aspect 
of Garhwal Himalaya. Author* is also thankful to Secretary 
E.C., HSCST for kind permission to submit this paper to ISPRS 
TC-VII / ISRS Symposium.