HIMALAYAN GEOLOGY Volume 10 Chief Editor : R.C. Misra Executive Editor : A.K. Sinha Asstt. Editor : A.K. Dubey Members V.C. Thakur J.T. Gergan N.S. Virdi K.S. Bist S. Kumar N.S. Gururajan WADIA INSTITUTE OF HIMALAYAN GEOLOGY DEHRA DUN 1980 Issued December 1982 UNIVERSiTATSBlBLIOTriEK HANNOVER TECHNISCHE INFORMATiONSBiSUOTHEK
CONTENTS Page PREFACE /// WERNER SCHWAN Short Outline of Facts and Problems The Evolution of Island Arc/Marginal Sea Systems... \ B.N. RAINA, U.C. PATI and N. SRIMAL Phases of Himalayan Orogeny... j2 WERNER SCHWAN Small-Scale Shortening Structures in Eastern and Northwestern Himalayan Regions and their Indications of the Major Tectonics and the Deformational History of the Orogene... 24 V.J. GUPTA and RAMESH C. KANWAR Biostratigraphy in Relation to Tectonics of Himalayas... 47 N.S. VIRDI Problem of the Root-Zone of Nappes in the Western Himalaya A Critical Review... 55 HAKIM RAI Origin and Emplacement of Ladakh Batholith : Present Day Knowledge... 78 D.K. BHATT A Schematic Model for the Tectonism of the Pir Panjal Range vis-a-vis the Sedimentation of Karewa in the Kashmir Valley... 94 M.G. ARUR and B.S. RAJAL Study of Recent Crustal Movements Across Shali Thrust in the Area of Shanan (Joginder Nagar) in Himachal Pradesh... 106 A. BHATTACHARYA, D.K. JUGRAN Geology and Structure in Parts of Parbati-Hurla Valley, Kulu District, H.P.... 116
Vi R.C. DBY Some Observations on the Main Boundary Fault in H.P. Himalaya \. '!' O.N. BHARGAVA The Tectonic Windows of the Lesser Himalaya V.K GAIROLA and R.JC. SAXENA i Structural Analysis of the Area Around Satpuli, Pauri Garhwal U.P. S.C. DOVAL and P.S. SAKLANI A Note on the Study of Minor Structures in Rocks of Srinagar Area, Garhwal Himalaya, U.P. M.N. SAXENA-... U.,.-;, ^ Orogenic and Epeirogenic Cycles in the Himalaya S.S. NEGI, A.K. SINHA X ", >. ' -.... " A Preliminary Report on the Geology and Structure of the Rudraprayag-Tilwara-Mayali Area of Garhwal Himalaya P.N. RAO and U.C. PATI Geology and Tectonics of Bhilangana Valley and its Adjoining Parts, Garhwal Himalaya, with Special Reference to the Main Central Thrust,,. S. VARADARAJAN and R.S. RAWAT Sulphide Mineralisation, Origin and its Relation to Magmatism, Deformation and Metamorphism in the Rudraprayag area ;,,- Chamoli District, Garhwal Himalaya, U.P., India ' GOPENDRA KUMAR Structural Framework and Tectonic Evolution of Kumaun ^'Himalaya, Uttar Pradesh B.K. PANDBY, V.P. SINGH, S.K. KWATRA and V.B. BHANOT Rb-Sr ISotopic-.Studies'on the Granitic and Gneissic Rocks of -' Baijnath Crystallines, Kumaun Himalaya (U.P.)..; 126 135 156 178 191 211 220 234 241 " 256
vit DlLEEP K. MlSRA ' ' Nature of the Ramgarh Thrust and Tectonic Position of Amritpur Granite in the Okhal-Kanda-Kalaagar area, Nainital' District, Kumaun Lesser Himalaya..., 264 A. AHMAD, A. SAXENA and B.K. SIDDHANTA Structural Analysis of Eastern Kumaun Himalaya and Related Problems..... 280 S.P.H. SYCHANTHAVONG and A.N. SHAH Tectonic Evolution and Stress Conditions in the Development of the Kathmandu Nappe and Kathmandu Basin, Nepal Himalaya... 304 RAVINDRA KUMAR Structure of Lead Zinc Prospect area of Ganesh Himal in Central Nepal... 326 P.K. GANGOPADHYAY and SIBSADHAN RAY Tectonic Framework of the \Rangit Window' Around Namchi, South Sikkim... 338 C. TRIPATHI, B.D. DUNGRAKOTI, L.S. JAIN, S.C. KAURA, S. BABU ROY and N.S. LAXMIPATHI Geology of Dirang-Doimara Area, Kameng District, Arunachal Pradesh with Special Reference to Structure and Tectonics... 353 C. TRIPATHI, R.K. GAUR, M. TIWARI, J. SANKAR and B.D. DUNGRAKOTI On the Geology of Sipi-Mara Window, Arunachal Pradesh... 366 R.K. ROY and R.N. KACKER Tectonic Analysis of Naga Hills Orogenic Belt Along Eastern Peri-Indian Suture... 374 SURENDAR KUMAR Geodynamic Interpretation of Tuting-Dewangiri Lineament in the Eastern Himalaya... 403
via S.K. ACHARYYA Structural Framework and Tectonic Evolution of the Eastern Himalaya... 412 S.V. SRIKANTIA Structural Framework and Tectonic Evolution of Kashmir and Himachal Himalaya... 440 K.S. BIST and A.K. SINHA Some Observations on the Geological and Structural Setup of Okhimath Area in Garhwal Himalaya A Preliminary Report... 467