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Precambrian Geology of the Himalaya: Structure and Metamorphism

 
B K Chakrabarti (Author)
Synopsis

Evidence of Precambrian deformation (and associated regional metamorphism) is better preserved in the Lesser Himalayan zone where the Tertiary Himalayan events left much less modifying effects compared to the Central Himalayan Crystallines. The striking absence of Tertiary igneous activity in the Lesser Himalayan zone perhaps indicates that belt (now commonly occurring as disconnected “klippe” bodies over the Lesser  Himalayan metapelite-quartzite-carbonate sequences ) was placed beyond the theatre of Tertiary activities (i.e. the root zone or the Central Himalayan zone).

Presence of regional Precambrian NNE-SSW F1 folds (occasionally described) are not taken into consideration by workers while projecting a Precambrian stratigraphy; that is why geological sections are drawn perpendicular to the Tertiary orographic trend and Precambrian folded sequences look like disconnected sheets in such sections.

To provide a coherent picture of Precambrian deformation and metamorphism in the entire-Himalayan belt from Pakistan in the west to Arunachal Pradesh (India) in the east, the author has described geological sections across the Precambrian sequences in Pakistan Himalaya (Kistwar window section), Simla Himalaya (Simla-Chor-Rampur-Kalpa section), Garhwal Himalaya (Bhagirathi and Alaknanda-Dhauli valleys), Nepal Himalaya (Annapurna sector- Kali Gandaki and Modi khola sections, Marsyandi-Dorandi-Buhri Gandaki-Manaslu sector, Trisuli-Langtang section, Kathmandu-Sheopuri-Gosainkund section; Eastern Nepal- Everest-Makalu section and terrain covering Okhaldunga, Arun and Tamur windows), Darjeeling-Sikkim Himalaya, and Bhutan and Arunachal Himalaya.

This volume is intended especially for young workers who  may find it  Useful for basic geological Information on structural and metamorphic aspects of the Precambrian Himalayan terrain.

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About the author

B K Chakrabarti

B.K. Chakrabarti is an alumnus of Presidency College, Kolkata. He had the good fortune to work under Prof. A.K. Saha during his formative years on structure and metamorphism in the OMG-Singhbhum Granite terrain and in the Bihar Mica Belt. Academic association especially with Profs K. Naha and D. Mukhopadhyay and encouragement from the learned colleagues in the Geological Survey of India, where he served for more than three decades, helped him to continue his study on the Himalaya for long years. Dr. Chakrabarti is Fellow of West Bengal Academy of Science and Technology, an examiner of a few universities and recipient of Dr. J. Coggin Brown Gold Medal. He was associated with editorial work for over two decades in all the three earth science journals Published from Kolkata.

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Bibliographic information

Title Precambrian Geology of the Himalaya: Structure and Metamorphism
Format Hardcover
Date published: 31.12.2009
Edition 1st ed.
Language: English
isbn 8185589798
length xii+171p., Maps; References; Illustrations; Index; 25cm.