Dyke Swarms:Keys for Geodynamic Interpretation: Keys for Geodynamic Interpretation

Description

Dykes occur in a wide variety of geological and tectonic settings and their detailed study through space and time is imperative for understanding several geological events. Dykes are believed to be an integral part of continental rifting and when they occur as spatially extensive swarms of adequate size can be of immense utility in continental reconstructions. This also helps to identify Large Igneous Provinces (LIPs). It is also well acknowledged that the continental flood basalts and major dyke swarms have their origin related in some way to the up-rise of hot mantle plumes which may lead to rifting and eventual continental break-up. Dykes signify crustal extension and are important indicators of crustal stabilisation events, supercontinental assembly and dispersal, crust-mantle interaction and play a significant role in the delineation of crustal provinces as well as in deciphering crustal evolution events. Many economic mineral deposits of the world are also associated with a variety of dykes. The volume will provide state-of-the-art information on all aspects of dykes with emphasis on the origin, evolution and emplacement of dykes. Front Matter....Pages i-xxx Front Matter....Pages 1-1 Geochemical and Petrological Characteristics of Mesozoic Dykes from Schirmacher Oasis (East Antarctica)....Pages 3-18 The Late Archaean Uauá Mafic Dyke Swarm, São Francisco Craton, Brazil, and Implications for Palaeoproteozoic Extrusion Tectonics and Orogen Reconstruction....Pages 19-31 An Integrated Study of Proterozoic Dykes, Dharwar Craton, Southern India....Pages 33-45 Proterozoic Mafic Dykes from the Southern Margin of Cuddapah Basin, India: Part 1 – Geochemistry and Petrogenesis....Pages 47-71 Proterozoic Mafic Dykes from the Southern Margin of Cuddapah Basin, India: Part 2 – Palaeomagnetism and Ar/Ar Geochronology....Pages 73-93 Palaeoproterozoic Dykes and Event Stratigraphy of the South Indian and Western Australian Cratons: Implications for Assembly of an Archaean Supercontinent “SIWA” and Its Breaking....Pages 95-113 Petrology and Mineral Chemistry of Picrite Sill from Peddakudala-Velpula Area, in Southwestern Part of the Proterozoic Cuddapah Basin, Andhra Pradesh, India....Pages 115-124 Mantle-Derived Carbonate Fluid Alteration and Gold Mineralization in Southern Granulite Terrain, Wynad, India....Pages 125-139 Mafic Dykes of Rewa Basin, Central India: Implications on Magma Dispersal and Petrogenesis....Pages 141-165 Tectonic Significance and Age of Doleritic Sill Near Bandhalimal in the Singhora Protobasin of Chhattisgarh Basin, Central India....Pages 167-187 Petrogenesis and Tectonic Setting of the Proterozoic Mafic Magmatic Rocks of the Central Indian Tectonic Zone, Betul Area: Geochemical Constraints....Pages 189-201 Petrology, Geochemistry and Petrogenesis of Early Precambrian Mafic Dyke Swarm from Dondi-Bhanupratappur-Keshkal Area, Central Bastar Craton, India....Pages 203-218 Fluid Induced Metamorphism in a Suite of Mafic Dykes from PalaeoProterozoic Mahakoshal Group, Central India....Pages 219-240 Petrology and Geochemistry of Metamorphosed Basic Intrusives from Chilka Lake Granulites, Eastern Ghats Belt, India: Implications for Rodinia Breakup....Pages 241-261 Mineralogical Control on Rheological Inversion of a Suite of Deformed Mafic Dykes from Parts of the Chottanagpur Granite Gneiss Complex of Eastern India....Pages 263-276 Petrology and Geochemistry of Acid Dyke Rocks with Reference to their Bearing on Rare Metal and Rare Earth Mineralisation: Studies from Malani Igneous Suite, Northern Peninsular India....Pages 277-282 Petrogenesis of Basaltic and Doleritic Dykes from Kawant, Chhotaudepur Province, Deccan Traps....Pages 283-299 Occurrence of Xenoliths in the Lamprophyre and Picrobasalt Dykes of Bakhatgarh – Phulmal Area, Jhabua District, Madhya Pradesh, India....Pages 301-313 Diorite Vein in Quenched Basalt and Its Implication for the Origin of Late-Granitoid Intrusives in Naga Hills Ophiolite, Northeast India....Pages 315-330 The Parishan Pluton in Qorveh Area, an Example for Magma Mingling Process, Southeastern Sanandaj, Iran....Pages 331-343 Front Matter....Pages 1-1 Petrology and Geochemistry of Cretaceous Mafic and Silicic Dykes and Spatially Associated Lavas in Central-Eastern Coastal Madagascar....Pages 345-375 Magnetic Fabric Studies on Mafic Dykes at a Volcanic Rifted Margin in the Henties Bay – Outjo Dyke Swarm, NW Namibia....Pages 377-399 Diopsidites and Rodingites: Serpentinisation and Ca-Metasomatism in the Oman Ophiolite Mantle....Pages 401-435 Petrogenetic Comparison of the Mafic Dykes in the Kohistan Paleo-Island Arc-Back-Arc System, Himalayas of North Pakistan....Pages 437-455 A Comparison of Chronometers Applied to Monastery Kimberlite and the Feasibility of U-Pb Ilmenite Geochronology....Pages 457-492 Front Matter....Pages 493-493 Precise U-Pb Age for the Great Whin Dolerite Complex, N.E. England and Its Significance....Pages 495-507 The Melville Bugt Dyke Swarm of Greenland: A Connection to the 1.5-1.6 Ga Fennoscandian Rapakivi Granite Province?....Pages 509-535 Mafic Melt Emplacement During the Shock Deformation in the Subvolcanic Environment: Example from Tastau Volcanoplutonic Ring Complex, Eastern Kazakhstan....Pages 537-567 Small Dacite Dyke, Southern Urals, Russia: Rapidly Quenched Liquid or Fine-Grained Cumulate?....Pages 569-581 Primary and Secondary Chemical Zonation in Mafic Dykes: A Case Study of the Vochelambina Dolerite Dyke, Kola Peninsula, Russia....Pages 583-601 Back Matter....Pages 603-605