Collection of papers presented at the National Seminar on Geological Evolution of Western Rajasthan organised by Dept. of Geology, Jai Narain Vyas University, Jodhpur on October 7-8, 1996.
This book presents findings from research into the Precambrian history of the Indian shield obtained using state-of-the-art technology. It demonstrates a paradigm shift towards studying the Precambrian shield regions using petrological, geochemical, structural, metallogenic, sedimentological and paleobiological data from the rocks in the Precambrian shield area, and presents a collection of contributions on these diverse topics that help to reconstruct the Precambrian evolution of the Indian Shield.
The northwestern Indian Shield, covering a major part of Rajasthan and parts of northern Gujarat, northwestern Madhya Pradesh, Haryana and Delhi, is one of the most important repositories of a variety of mineral deposit types, particularly of base metals. Their metallogeny has been a topic of both academic and economic interest for more than five decades. This volume presents in a systematic manner the essential features of all economically significant types of metallic mineral deposits in this region and considers their mettallogeny in the perspective of crystal evolution of the northwestern Indian shield. Current concepts, problems and the probable trends of future research are highlighted. Leading geoscientists with first hand knowledge of this Precambrian terrene have contributed to this volume. The book will be of interest to exploration geologists, researchers and postgraduate students concerned with Precambrian geology and metallogeny.
The book will help the future earth scientists to identify potential horizons of future research work not only to enhance our knowledge but also to provide clues to finding new mineral deposits in this paradise for geologists.
This Memoir provides a comprehensive review of the Precambrian basins of the four Archaean nuclei of India (Dharwar, Bastar, Singhbhum and Aravalli-Bundelkhand), encompassing descriptions of the time-space distribution of sedimentary-volcanic successions, the interrelationship between tectonics and sedimentation, and basin histories. Studies of 22 basins within the framework of an international basin classification scheme deepen an understanding of the basin architecture especially for cratonic basins. Most Indian sedimentary successions formed as cratonic to extensional-margin rift and thermal-sag basins, some reflecting mantle plume movement, subcrustal heating or far-field stress. This Memoir shows that Phanerozoic plate-tectonic and sequence stratigraphic principles can be applied to the Precambrian basins of large Archaean provinces. The differences between the stratigraphic architecture of the Indian Precambrian and examples of Phanerozoic basin-fill successions elsewhere are ascribed to variable rates and intensities of the controls on accommodation and sediment supply, and changes inherent in the evolution of the hydrosphere-atmosphere and biosphere systems.
Advances in the field of marine geoscience through the medium of deep-ocean drilling have been rapid and continue to be so. Part of this text reflects the results of findings from recent legs of the Ocean Drilling Programme. Other parts provide syntheses of the volume of drilling information collected over a period of more than 20 years, which provide a detailed picture of how oceans have evolved since the late Mesozoic. The book should be of interest to marine geologists, sedimentologists, palaeoceanographers and structural geologists.
This book presents in a concise format a simplified and coherent geological-dynamical history of the Indian subcontinent (including Sri Lanka, Bangladesh, Myanmar, Southern Tibet and Pakistan). Encompassing a broad array of information related to structure and tectonics, stratigraphy and palaeontology, sedimentation and palaeogeography, petrology and geochemistry, geomorphology and geophysics, it explores the geodynamic developments that took place from the beginning around 3.4 billion years ago to the last about 5,000 years before present. Presented in a distilled form, the observations and deductions of practitioners, this book is meant for teachers, researchers and students of geology, geophysics and geomorphology and practitioners of earth sciences. A comprehensive list of references to original works provides guidance for those seeking further details and who wish to examine selected problems in depth. The book is illustrated with a wealth of maps, cross sections and block diagrams — all simplified and redesigned.
This well-illustrated book aims to enhance observations and understanding of structural features and proximity-indicator minerals, critical in exploration. The book provides a unique blending of different content on observational and critical aspects of data acquisition, geological, structural, tectonic set-up, mineral deposit types, geophysical framework, and proximity indicator minerals. Combining these topics led to a comprehensive understanding to facilitate mineral targeting and exploration in green- and brown-field terrains. Besides field photographs, the write-up is lavishly supplemented with relevant geological and geophysical maps, tables, and case stories in field geology, making it useful for a much larger section of the geoscientific community professional geologists and geophysicists, students, teachers, and also decision-makers in geo-surveys and exploration.
Despite decades of study, fundamental aspects of the development of the Earth’s crust remain enigmatic. This book presents geophysical and geological studies obtained from different tectonic structures and geological time intervals. It contains three sections: “Crustal Evolution and Tectonic Problems”, “Geophysical Methods in Geological Applications” and “Seismic Forecasting, Seismotectonics and Geodynamic Evolution of the Himalayan Belt”. Chapters address such topics as the evolution of tectonic structures of Earth, how geophysical and geological data can be used for modelling this evolution, and the geodynamic processes in the Earth’s crust with the present tectonic activity.