Download or read book A Geodynamic Model of the Northern North Atlantic written by Birte-Marie Ehlers and published by . This book was released on 2009 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arctic region plays an important role in the configuration of the present day global climate. In particular the Fram Strait area, presently the only deep-water gateway between the Arctic Ocean and the world ocean, accounts for the Arctic region climate. It is still speculative how and when this deep-water connection opened due to its tectonic and geologic evolution, and how strong this influenced northern ocean circulations. It is assumed that the change of the northern ocean circulations correlate with long-term climate changes. This study provides a compilation of a geodynamic model of the northern North Atlantic, which is continued to the Arctic Ocean, and investigates the tectonic and bathymetric development. Due to the movements of the Eurasia, Greenland, and North American plates, as well as sediment accumulation changes, the width and seafloor depth of the Fram Strait was significantly modified since its initial break-up. Geophysical data in the northern North Atlantic and in the Arctic Ocean, gathered by the Alfred Wegener Institute during the last years, make this study possible. The results present an advanced age model of the oceanic crust. A palaeobathymetric reconstruction results in a timing of the Fram Strait opening of 25 Ma for a shallow-water exchange. From 17 Ma on, a deep-water exchange between the northern North Atlantic and the Arctic Ocean was possible. To link the results of the palaeobathymetric reconstruction to the global climate history, palaeoceanographic model scenarios are calculated for the present day bathymetric configuration and the palaeobathymetry of the Middle Miocene (15 Ma), the Early Miocene (20 Ma) and the Middle Eocene (45 Ma). The study shows the complex relationship between plate tectonics, the crustal development, sediment accumulations, bathymetric changes and changes in ocean circulation in the northern North Atlantic and in the Arctic Ocean and speculates on their link to global past long-term climate changes.
Download or read book Greenland Norway Separation A Geodynamic Model for the North Atlantic written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining information from onshore and offshore Mid-Norway, we propose a structural model for the Scandinavian North Atlantic passive margin from Permo-Carboniferous through Present. We re-examine the role of post-Permo-Carboniferous normal faults and define an innermost boundary fault system forming the continentward limit of the rifted margin. Crustal-scale cross-sections of the Greenland-Norway passive margins show the asymmetric nature of crustal extension between the two conjugate margins. On both margins the upper plate/lower plate geometry and the dip of major extensional normal faults change across the broad width of the Jan Mayen Fracture Zone. South of this zone on the Møre Margin (Norway), the dip of the major faults is towards the west, defining a lower plate - tilted block margin. North of the transform on the Vøring-Trøndelag Margin (Norway), the major faults dip to the east, defining an upper plate or flexural margin. In the Norwegian passive margin, the transition occurs as a progressive change of vergence of normal faults between the northern Vøring-Trøndelag Platform area and the Møre Basin. The model shows continuous separation between the two conjugate margins of Greenland and Norway, starting with a very tight fit in Late Permian time. The rifting events between Late Permian and Late Cretaceous are associated with a broadly WSW-ENE- to W-E- oriented extension while Late Cretaceous to Early Tertiary extension directions are oriented NNW-SSE. These plate separation directions and the subsequent plate motion can be related to the important basin development within, and probably, to the structural evolution and geometry of, the conjugate passive margins.
Download or read book Iceland Within the Northern Atlantic Volume 1 written by Brigitte Van Vliet-Lanoe and published by John Wiley & Sons. This book was released on 2021-08-31 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volcanic island of Iceland is a unique geological place due both to its position in the middle of the Atlantic Ocean and its repeated glaciations. It has been an accurate recorder of geodynamic and regional climatic evolutions for at least the last 15 million years. This book traces the history of Iceland, which is linked to the opening of the North Atlantic and the reactivation of the ancient suture of the Iapetus Ocean. It gives a view of climate evolution that is partly controlled by the dynamics of the ocean floor and analyzes the movement of the Jan Mayen tectonic plate and the progressive insularization of the Greenland–Faroe Ridge, which gave birth to Iceland. It also tries to understand the formation and migration of the deep Iceland hotspot and the lava flows that have, for millions of years, shaped this island. This book brings together the internal and external geodynamics of our planet to understand how Iceland functions and its role as a recorder of the paleoclimatic evolution of the Northern Hemisphere.
Download or read book Geodynamic Models written by R. W. Van Bemmelen and published by Elsevier. This book was released on 2013-10-22 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in Geotectonics, Volume 2: Geodynamic Models: An Evaluation and a Synthesis presents the concept of sea-floor spreading and the hypothesis of global plate tectonics. This book provides a basic understanding of the global movements. Organized into eight chapters, this volume begins with an overview of the concept of global plate tectonics, with its additional hypotheses of subduction zones and sea-floor spreading. This text then examines the concept of vertical deformations of the lithosphere and their gravitational spreading. Other chapters consider the analysis of geotectonic processes that is based on some general principles of their mechanics. This book discusses as well the origin of mega-undations in turbulent and laminar flow systems in the lower mantle, where the matter may have a Newtonian viscosity. The final chapter deals with the geodynamics of the Earth's crust as the result of the outward growth of the deep ocean floor from mid-ocean ridges. This book is a valuable resource for geologists, geonomists, and geophysicists.
Download or read book Iceland Within the Northern Atlantic Volume 1 written by Brigitte Van Vliet-Lanoe and published by John Wiley & Sons. This book was released on 2021-07-19 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volcanic island of Iceland is a unique geological place due both to its position in the middle of the Atlantic Ocean and its repeated glaciations. It has been an accurate recorder of geodynamic and regional climatic evolutions for at least the last 15 million years. This book traces the history of Iceland, which is linked to the opening of the North Atlantic and the reactivation of the ancient suture of the Iapetus Ocean. It gives a view of climate evolution that is partly controlled by the dynamics of the ocean floor and analyzes the movement of the Jan Mayen tectonic plate and the progressive insularization of the Greenland–Faroe Ridge, which gave birth to Iceland. It also tries to understand the formation and migration of the deep Iceland hotspot and the lava flows that have, for millions of years, shaped this island. This book brings together the internal and external geodynamics of our planet to understand how Iceland functions and its role as a recorder of the paleoclimatic evolution of the Northern Hemisphere.
Download or read book Onshore Offshore Relationships on the North Atlantic Margin written by B.T.G. Wandås and published by Gulf Professional Publishing. This book was released on 2005-06-07 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes a selection of oral and poster presentations from "Onshore-Offshore Relationships on the Nordic Margin Conference" held in Trondheim in 2002. The conference was jointly arranged by the Norwegian Geological Society (NGF) and the Norwegian Petroleum Society (NPF), and attempted, through different thematic sessions, to bridge the gap often noted between industry and academic research. The first part of the conference included presentations under the theme "Basement control on offshore structuring" with representative articles from that segment included in this book and covering topics that range from analysis of vertical movements of basement substrates to the deep structural architecture of the Norwegian Sea to the development of the Jan Mayen microcontinent. These papers set the scene for the second segment of the conference, "Linking uplift and erosion with subsidence and deposition", that in the present book include articles related to the Triassic to Present-day infill history in the Norwegian and northern North Seas. The last segment of the conference addressed "New challenges" with respect to natural features of the deep-water areas that necessitate particular consideration and innovation on the part of research and industry to mitigate risk and maximize returns from field development. In this book, the articles addressing this theme present analyses of the enormous submarine slides that took place during the Holocene in the Norwegian Sea, and are of particular interest to the developers of the Ormen Lange gas field; other articles address the occurrences of gas hydrates in the near sea floor and the challenges presented in identifying and protecting the Lophelia cold-water reefs in the region.* Processes creating the structural framework for the deposition and depositional patterns in the Norwegian Sea and northern North Sea* Erosion and subsequent deposition of sediments in the subsiding deep-water basins in the Norwegian Sea area and northern North Sea* Challenges the oil industry has met in the deep-water areas of the Norwegian continental shelf
Download or read book The NE Atlantic Region written by G. Péron-Pinvidic and published by Geological Society of London. This book was released on 2017-10-30 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NAG-TEC project was a collaborative effort by the British Geological Survey, the Geological Survey of Denmark and Greenland, the Geological Survey of Ireland, the Geological Survey of the Netherlands, the Geological Survey of Northern Ireland, the Geological Survey of Norway, Iceland GeoSurvey and the Faroese Geological Survey (Jarðfeingi), along with a number of academic partners and significant support from industry. The main focus was to investigate the tectonic evolution of the region with a particular emphasis on basin evolution along conjugate margins. A key outcome was the development of a new tectonostratigraphic atlas and database that includes comprehensive geological and geophysical information relevant for understanding the Devonian to present evolution of the NE Atlantic margins. These provide the foundation upon which ongoing research and exploration of the area can build. This Special Publication provides some of the first scientific results and analysis based on the project, including regional stratigraphic analysis and correlations, crustal structure and interpretation of geophysical data sets, plate kinematics and the evolution of igneous provinces.
Download or read book The North Atlantic Igneous Province written by David W. Jolley and published by Geological Society of London. This book was released on 2002 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, recognition of the potential role of large igneous provinces in affecting ocean and atmosphere systems and biotic evolutionary pathways has lead to increased interest in this province. This has been further stimulated by the expansion in the search for oil and gas in Mesozoic and Tertiary sediments along the NE Atlantic Margin. An improved understanding of the interaction between igneous and sedimentary processes is vital for the identification of potential hydrocarbon resources.
Download or read book Tectonic Boundary Conditions for Climate Reconstructions written by Thomas J. Crowley and published by Oxford University Press, USA. This book was released on 1998 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, efforts to integrate solid earth geophysical studies and climate studies have progressed slowly, but this volume responds to the deficiency with an in-depth examination of climate modeling. Written by eminent figures from both disciplines, it focuses on the role of tectonic boundary conditions for paleoclimate reconstruction at the same time it presents background material on the impact of tectonic changes on climate and the uncertainties in tectonic boundary conditions.
Download or read book The Geology of Iberia A Geodynamic Approach written by Cecilio Quesada and published by Springer. This book was released on 2019-06-28 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taking a new global approach, this unique book provides an updated review of the geology of Iberia and its continental margins from a geodynamic perspective. Owing to its location close to successive plate margins, Iberia has played a pivotal role in the geodynamic evolution of the Gondwanan, Rheic, Pangea, Tethys s.l. and Eurasian plates over the last 600 Ma of Earth's history. The geological record starts with the amalgamation of Gondwana in the Neoproterozoic succeeded by the rifting and spreading of the Rheic ocean; its demise, which led to the amalgamation of Pangea in the late Paleozoic; the rifting and spreading of several arms of the Neotethys ocean in the Mesozoic Era and their ongoing closure, which was responsible for the Alpine orogeny. The significant advances in the last 20 years have attracted international research interest in the geology of the Iberian Peninsula. This volume presents the most comprehensive, and updated description of the Alpine cycle in Iberia. This volume focuses in the different geological events during the Alpine orogeny as well as the lithological succession . This book is of interest not only for scientists of Portugal and Spain but also for geoscientists searching for analogies for oil and gas as well as tourists visiting the main mountain ridges of Iberia such as the Pyrenees.
Download or read book Tertiary Deep Marine Reservoirs of the North Sea Region written by T. McKie and published by Geological Society of London. This book was released on 2015-11-02 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discovery of the Arbroath, Montrose and Forties fields initiated intensive exploration of the Tertiary deep-marine play in the North Sea region. Subsequent discoveries demonstrated the success of this play and the geological diversity of the depositional systems. The play is now mature and in many areas the remaining exploration potential is likely to be dominated by small, subtle traps with a major component of stratigraphic trapping. Economically marginal discoveries need an in-depth understanding of subsurface uncertainty to mitigate risk with limited appraisal wells. Mature fields require detailed geological understanding in the search for the remaining oil. This volume focuses on the regional depositional setting of these deep-marine systems, providing a stratigraphic and palaeogeographical context for exploration, and development case histories that outline the challenges of producing from these reservoirs. The fields are arranged around the production life cycle, describing the changing needs of geological models as the flow of static and dynamic data refines geological understanding and defines the nature of new opportunities as fields mature.
Download or read book Norsk Geologisk Tidsskrift written by and published by . This book was released on 2007 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book World Atlas of Submarine Gas Hydrates in Continental Margins written by Jürgen Mienert and published by Springer Nature. This book was released on 2022-01-01 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: This world atlas presents a comprehensive overview of the gas-hydrate systems of our planet with contributions from esteemed international researchers from academia, governmental institutions and hydrocarbon industries. The book illustrates, describes and discusses gas hydrate systems, their geophysical evidence and their future prospects for climate change and continental margin geohazards from passive to active margins. This includes passive volcanic to non-volcanic margins including glaciated and non-glaciated margins from high to low latitudes. Shallow submarine gas hydrates allow a glimpse into the past from the Last Glacial Maximum (LGM) to modern environmental conditions to predict potential changes in future stability conditions while deep submarine gas hydrates remained more stable. This demonstrates their potential for rapid reactions for some gas hydrate provinces to a warming world, as well as helping to identify future prospects for environmental research. Three-dimensional and high-resolution seismic imaging technologies provide new insights into fluid flow systems in continental margins, enabling the identification of gas and gas escape routes to the seabed within gas hydrate environments, where seabed habitats may flourish. The volume contains a method section detailing the seismic imaging and logging while drilling techniques used to characterize gas hydrates and related dynamic processes in the sub seabed. This book is unique, as it goes well beyond the geophysical monograph series of natural gas hydrates and textbooks on marine geophysics. It also emphasizes the potential for gas hydrate research across a variety of disciplines. Observations of bottom simulating reflectors (BSRs) in 2D and 3D seismic reflection data combined with velocity analysis, electromagnetic investigations and gas-hydrate stability zone (GHSZ) modelling, provide the necessary insights for academic interests and hydrocarbon industries to understand the potential extent and volume of gas hydrates in a wide range of tectonic settings of continental margins. Gas hydrates control the largest and most dynamic reservoir of global carbon. Especially 4D, 3D seismic but also 2D seismic data provide compelling sub-seabed images of their dynamical behavior. Sub-seabed imaging techniques increase our understanding of the controlling mechanisms for the distribution and migration of gas before it enters the gas-hydrate stability zone. As methane hydrate stability depends mainly on pressure, temperature, gas composition and pore water chemistry, gas hydrates are usually found in ocean margin settings where water depth is more than 300 m and gas migrates upward from deeper geological formations. This highly dynamic environment may precondition the stability of continental slopes as evidenced by geohazards and gas expelled from the sea floor. This book provides new insights into variations in the character and existence of gas hydrates and BSRs in various geological environments, as well as their dynamics. The potentially dynamic behavior of this natural carbon system in a warming world, its current and future impacts on a variety of Earth environments can now be adequately evaluated by using the information provided in the world atlas. This book is relevant for students, researchers, governmental agencies and oil and gas professionals. Some familiarity with seismic data and some basic understanding of geology and tectonics are recommended.
Download or read book Exhumation of the North Atlantic Margin written by Anthony G. Doré and published by Geological Society of London. This book was released on 2002 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Volcanoes of the Azores written by Ulrich Kueppers and published by Springer. This book was released on 2018-02-22 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Azores archipelago consists of nine islands that emerge from the Azores Plateau in the Central Northern Atlantic, situated within the triple junction of the American, Eurasian and African lithosphere plates. Subaerial volcanic activity has been well known since the Pliocene and continues today, with several well-documented eruptions since the settlement of the islands in the fifteenth century. The origin of the Azores Plateau has been a matter of scientific debate and thus this book provides the first comprehensive overview of geological features in the Azores from volcanological, geochemical, petrological, paleontological, structural and hydrological perspectives
Download or read book Geodynamic Evolution of written by François Roure and published by Editions OPHRYS. This book was released on with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Avalonian and Related Peri Gondwanan Terranes of the Circum North Atlantic written by Damian Nance and published by Geological Society of America. This book was released on 1996-01-01 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
