Contents Foreword ......................................................................................................... (vii) Preface ...............................................................................................................(ix) Acknowledgements .......................................................................................... (xiii) Abbreviations used........................................................................................ (xviii)
Chapter 1
Earth’s Structure 1.1 Lithosphere and Asthenosphere ............................................... 2 1.2 Seismological Studies of the Earth’s Crust ................................ 5 1.3 Controlled Source Seismic Study .............................................. 7 1.4 Controlled Source Seismic Studies over the Indian Plate ........ 10 Chapter 2
Indian Peninsular Shield 2.1 East-west Profiles Across the Eastern and Western Dharwar Cratons ........................................................ 17 2.1.1 Cuddapah Basin .......................................................... 18 2.1.1.1 Geology and Tectonics.............................. 18 2.1.1.2 Seismic Results ......................................... 18 2.1.1.3 Evolutionary Model ................................. 27 2.1.2 Western Dharwar Craton ............................................ 28 2.1.2.1 Geology and Tectonics.............................. 29 2.1.2.2 Seismic Results ........................................ 29 2.1.3 Other Interpretations of East-west Profiles ................. 31 2.2 Southern Granulite Terrain ..................................................... 33 2.2.1 Geology and Tectonics ............................................... 34 2.2.2 Seismic Results .......................................................... 37 2.2.2.1 Kuppam-Palani Profile.............................. 37 2.2.2.2 Evolutionary Model of the Cauvery Shear Zone System ..................... 45 2.2.2.3 Vattalkundu-Kanyakumari Profile ............ 47
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Chapter 3
Aravalli-Delhi Fold Belt 3.1 Geology and Tectonics ............................................................ 51 3.2 Seismic Results ........................................................................ 56 3.3 The Evolutionary Model of the Aravalli-Delhi Fold Belt........ 65 Chapter 4
East Coast Sedimentary Basins of India 4.1 The East Coast Basins ............................................................. 72 4.2 The West Bengal Basin............................................................ 73 4.2.1 Geology and Tectonics ............................................... 74 4.2.2 Seismic Results ........................................................... 75 4.3 The Mahanadi Basin ............................................................... 84 4.3.1 Geology and Tectonics ............................................... 85 4.3.2 Seismic Results .......................................................... 86 4.4 The Godavari Rift Basin ......................................................... 95 4.4.1 Geology and Tectonics ............................................... 96 4.4.2 Seismic Results ........................................................... 98 Chapter 5
Deccan Volcanic Province Near the West Coast 5.1 The West Coast of India ........................................................ 104 5.2 The Deccan Trap .................................................................... 106 5.3 The Koyna Region ................................................................ 107 5.3.1 Geology and Tectonics ............................................. 107 5.3.2 Seismic Results ......................................................... 108 5.4 The Cambay Basin ................................................................. 116 5.4.1 Geology and Tectonics ............................................. 116 5.4.2 Seismic Results ......................................................... 119 5.5 The Saurashtra Peninsula ....................................................... 127 5.5.1 Geology and Tectonics ............................................. 128 5.5.2 Seismic Results ......................................................... 130 5.6 Reasons for Thinner and Underplated Crust .......................... 134
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Chapter 6
Central Indian Region 6.1 The Narmada Region ............................................................. 137 6.1.1 Geology and Tectonics ............................................. 137 6.1.2 Seismic Results ........................................................ 140 6.1.3 Tectonic Significance of Seismic Results ................. 152 6.2 Deep Reflection Studies Across the Central Indian Suture ... 155 Chapter 7
Northwest Himalayan, Tibet and Karakoram Regions 7.1 Geology and Tectonics of the Northwest Himalaya .............. 162 7.2 Seismotectonics of the Himalayan and Tibet Regions........... 164 7.3 Crustal Seismic Studies in Eastern Himalayan Region of Nepal and Tibet ...................................................................... 165 7.4 Project INDEPTH Studies in the High Himalaya and Tibet .. 167 7.5 Crustal Seismic Studies in the Pamir-Karakoram Region ..... 170 7.6 Crustal Seismic Studies in Hindukush and Jammu & Kashmir Regions .......................... 173 7.7 Tectonic Significance of Seismic Results .............................. 181 7.8 Deep Reflection Studies in Himachal Pradesh ...................... 182 Chapter 8
Velocity Structure of the Indian Crust ....................... 188 References ................................................................................... 195
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