Publikationsdatum:
2005
Beschreibung:
The volume is mainly focussed on structural and metamorphic characteristics
of the Himalayan rocks exposed in various sectors of the Himalaya. The peridotites in
the Spongtang nappe of Ladakh are mylonitised and occur in superposed imbrications. The
regionally metamorphosed pelitic rocks of a part of Kashmir show low pressure,
intermediate and medium pressure of metamorphism. The Buniyar granite is an intrusive
pluton in the Dogra Slates (Precambrian) in the Western part of Kashmir. The NE-SW
compressional stress was responsible for development of multiple folds in metamorphics
of Chamba area. The radiometric date of granites in Chor mountain is Pre-Tertiary (1000
m.y and 525 m.y.). The metamorphic and folding processes of the Chor pelites were
terminated by the Jutogh thrusting phenomena. The crystallines of Palampur (Himachal)
are characterised by the Chail thrust and contain about 12 types of garnet texturally.
The Manali-Rohtang Pass area forms a! part of an overturned limb of the Crystalline
nappe. The thrusts in the Kumaun region developed from the hinterland to foreland. The
total displacement of the Munsiari, Krol and Berinag Sheets was about 330 km. The Purola
area in Garhwal is located between the Main Central Thrust and the Tons Thrust.
Metamorphics in the Bhagirathi valley were formed at the temperatures ranging from 479?
to 666? C. The uranium mineralisation in the granite-gneisses and the footwall quartzite
took place after the formation of the Main Central Thrust III in Tehri Garhwal. The
rock-fabric (b-c girdles of quartz) in rocks of Lansdowne Crystalline nappe developed
along the thrust-transport direction with rotation which is exhibited by triclinic
symmetry The fracture and lineament patterns were formed in the frontal parts of the
Himalaya. The Lesser Himalaya region in Himachal Pradesh has overlapping crystalline
thrust. The Chail nappes are traceable throughout the length of the Lesser Himalaya. The
nappe thrusting in two phases occurred in Eastern Nepal during middle Tertiary and
Quaternary times. Simple shear type of deformation affected the rocks in Eastern Nepal.
The high heat flow in rocks of Darjiling region was responsible for the first phase of
metamorphism which was followed by overturning and thrusting during the second phase of
deformation. The metapelites in Eastern Sikkim are characterised by Kyanite-sillimanite
isograd with associated quartzofeldspathic melt during pre-and syn-kinematic
deformation. The reflected Aravalli trends are present in Arun transanticline and Tista
Dome in Bhutan. The Central Tibetan region was possibly the homeland for the nappes in
the Eastern Himalaya. This book would be useful to earth scientists, academicians
& research scholars. 1. The Central Himalayan Gneisses in Northern Pakistan - R.
D. Broughton and B. F. Windley 2. Ductile Shearing in Peridotites of Spongtang Nappe,
Ladakh - I. Reuber, P. Nehlig and G. Reibel 3. Low-Pressure Metamorphism in a Regionally
Metamorphic Terrain of Doda - Kashmir Himalaya, B. K. Das 4. The Buniyar Granite of the
Kashmir Himalaya - T. R. Sharma and K. R. Sharma 5. The Aureole Zone and Metasediments
of Dhauladhar, Chaori Khas (H.P.) - R. S. Bedi and A. K. Prasad 6. Geochronology of
Bandal Granitoids, Kulu, Himachal Pradesh - N. Kishore, V. P. Singh, A. K. Kansal, A.
Kumar, N. K. Sharma and Bimal Rai 7. The Jutoghs and their Structural History, Chur Area
- R. C. Kanwar and I. Singh 8. Garnets from Metapelites of the Palampur Area (H.P.) - N.
Chaudhri and L. N. Gupta 9. Metamorphics of Manali-Rohtang Area, NW Himalaya - S. Kumar
10. Structural Analysis of Chamba Region, Himachal Pradesh - B. K. Sharma and A. M.
Bhola 11. Structures of Purola Area, Garhwal Himalaya - A. K. Pachauri 12. Mylonites of
Dunda Area, Uttarakashi, Uttaranchal - R. K. Prasad 13. Metamorphics of the Bhagirathi
Valley, Garhwal Himalaya - P. S. Saklani and V. K. Bahuguna 14. Uranium Mineralisation
around Raunsal, Uttaranchal - G. R. Narayan Das, G. S. Bhatnagar, A. K. Bhattacharya and
Y. C. Sharma 15. Naini-Group/Nappe Rudraprayag (Garhwal Himalaya) - S. Varadarajan and
R. S. Rawat 16. Fabric of the Amri Tectonites, Lansdowne Area, Uttaranchal - S. N.
Sarkar and S. M. Dutta 17. Tectonics of Central Crystallines Nappes, Garhwal Himalaya -
P. S. Saklani 18. Reinterpretation of the Tectonics of the Central and Southern Lesser
Himalaya, Uttaranchal - V. K. Gairola 19. Structural Evolution of the Kumaun Lesser
Himalaya - M. R. W. Johnson 20. Structure of the Kumaun Lesser Himalaya - K. S. Valdiya
21. Central Crystallines and Main Central Thrust, Eastern Kumaun Himalaya - V. C. Thakur
and B. K. Choudhury 22. The North Almora Thrust Zone, Kumaun Himalaya - D. B. Yedekar
and K. B. Powar 23. Fractures and Lineaments in the Lesser Himalaya of Kumaun - R.N.
Pande, G. Dikshit and D. N. Kanungo 24. The Chail Nappes in the Himalaya - G. Fuchs 25.
Chail Metamorphics of the Himachal Pradesh - N. S. Virdi 26. Relief Thrusts in the
Eastern Nepal Himalaya - J. Jaros and J. Kalvoda 27. Structure and Metamorphism in
Eastern Nepal - Y. Maruo and K. Kizaki 28. Mesoscopic Structures and Tectonics of the
Central Nepal Himalaya - W. Bogacz and J. Krokowski 29. Harrovian Metamorphism of
Takdah, Darjeeling (Eastern Himalaya) - R. K. Lal, S. Mukherji and D. Ackermand 30.
Deformation and Strain of the Himalayan Nappes: Sikkim, Eastern Himalaya - S. Sinha Roy
31. The Bhutan Himalaya: Stratigraphy and Structure - B. S. Jangpangi 32. Eastern
Himalayan Stratigraphy and Tectonics - S. K. Acharyya 33. Structural Geology of the
Siyom Valley, Arunachal Pradesh - Surendra Singh and A. K. De
Schlagwort(e):
Handbook of geology
;
Geol. aspects
;
India
;
China
;
Nepal
;
Tectonics
;
Plate tectonics
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