Download or read book Global Paleomagnetic Data Analysis written by Chenjian Fu and published by . This book was released on 2021 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleomagnetic Apparent Polar Wander Paths (APWPs) are the principal means of describing plate motions through most of Earth history. However, there are limitations to paleomagnetic data such as the poorly-constrained longitudes of paleo-plates and the degrading quality and density of paleomagnetic data with increasing age. Yet comparing the spatio-temporal patterns and trends of APWPs between different tectonic plates is important for testing proposed paleogeographic reconstructions of past supercontinents. Similarity between paleomagnetic APWPs of different tectonic plates could indicate the plates were once part of a supercontinent. However, there is no clearly defined quantitative approach to determine the degree of similarity between APWPs. A new similarity measuring algorithm between two APWPs, that combines three separate difference metrics that assess both spatial separation of coeval poles, and similarities in the bearing and length of coeval segments, using a weighted linear summation, is proposed. Bootstrap tests are used to determine whether the differences between coeval poles and segments are significant for the given spatial uncertainties in pole positions. An additional Fit Quality metric is used to discriminate between low difference scores caused by comparing poorly constrained paths with large spatial uncertainties from those caused by a close fit between well-constrained paths. The individual and combined metrics are demonstrated using tests on synthetic pairs of APWPs with varying degrees of spatial and geometric difference. In a test on real paleomagnetic data, these metrics can quantify the effects of correction for inclination shallowing in sedimentary rocks on Gondwana and Laurussia's 320-0 Ma APWPs. A Python package on GitHub is provided online, as open-source software, to allow automatic calculation of similarity scores. APWPs using 168 different methods are generated, and then the new APW path similarity measuring tool is applied to find the best APWP generating methods. Paleopole attributes are used to weigh their influence on mean poles, or to determine if they should be omitted for producing a 'better' mean pole. Different key attributes, that can be quantified, or their combination, are considered. In addition, when merging paleopoles to produce a smoothed mean path, choices are made not only about which data are included or excluded, but how data are combined. Moving averaging is used to combine data. The results indicate that our new Age Position Picking (APP) method (considering the whole age ranges of paleopoles) generates more reliable APWPs than the traditional Age Mean Picking (AMP) method (considering only middle points of age ranges) for making an APWP, when moving average is the core technique of the methodology. Additionally, weighting paleopoles, a traditional processing step for making a paleomagnetic APWP, is actually unnecessary. The APP method (without weighting paleopoles), which performs significantly better with modern (~120-0 Ma) paleomagnetic data than other methods, should be applied to older 'deep-time' datasets.

Download or read book Paleomagnetism written by Michael W. McElhinny and published by Elsevier. This book was released on 1999-10-18 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleomagnetism is the study of the fossil magnetism in rocks. It has been paramount in determining that the continents have drifted over the surface of the Earth throughout geological time. The fossil magnetism preserved in the ocean floor has demonstrated how continental drift takes place through the process of sea-floor spreading. The methods and techniques used in paleomagnetic studies of continental rocks and of the ocean floor are described and then applied to determining horizontal movements of the Earth's crust over geological time. An up-to-date review of global paleomagnetic data enables 1000 million years of Earth history to be summarized in terms of the drift of the major crustal blocks over the surface of the Earth. The first edition of McElhinny's book was heralded as a "classic and definitive text." It thoroughly discussed the theory of geomagnetism, the geologic reversals of the Earth's magnetic field, and the shifting of magnetic poles. In the 25 years since the highly successful first edition of Palaeomagnetism and Plate Tectonics (Cambridge, 1973) the many advances in the concepts, methodology, and insights into paleomagnetism warrant this new treatment. This completely updated and revised edition of Paleomagnetism: Continents and Oceans will be a welcome resource for a broad audience of earth scientists as well as laypeople curious about magnetism, paleogeography, geology, and plate tectonics. Because the book is intended for a wide audience of geologists, geophysicists, and oceanographers, it balances the mathematical and descriptive aspects of each topic. Details the theory and methodology of rock magnetism, with particular emphasis on intrepreting crustal movements from continental and oceanic measurements Outlines Earth history for the past 1000 million years, from the Rodinia super-continent through its breakup and the formation of Gondwana to the formation and breakup of Pangea and the amalgamation of Eurasia Provides a comprehensive treatment of oceanic paleomagnetism Provides a set of color pateogeographic maps covering the past 250 million years Written by two internationally recognized experts in the field

Download or read book Paleomagnetism of the Atlantic Tethys and Iapetus Oceans written by Rob van der Voo and published by Cambridge University Press. This book was released on 2005-01-20 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains the use and techniques of paleomagnetism to map the movement of major portions of the Earth's surface through time. Written for a geological audience, the initial chapters provide the basic essentials for understanding the value and significance of paleomagnetic results. The later chapters are unique in bringing together the vast amounts of available paleomagnetic data and analyses. This information is integrated with the paleogeography and tectonic movements of the blocks and placed in context with current tectonic hypotheses. A considerable proportion of the present continents are considered - that is the land areas that are now found around the Atlantic and Indian Oceans and in Asia. Also presented is an extensive catalogue of paleomagnetic results for all major continents and the displaced elements that they contain.

Download or read book Essentials of Paleomagnetism written by Lisa Tauxe and published by Univ of California Press. This book was released on 2010-03-19 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book by Lisa Tauxe and others is a marvelous tool for education and research in Paleomagnetism. Many students in the U.S. and around the world will welcome this publication, which was previously only available via the Internet. Professor Tauxe has performed a service for teaching and research that is utterly unique."—Neil D. Opdyke, University of Florida

Download or read book Paleomagnetic Principles and Practice written by L. Tauxe and published by Springer Science & Business Media. This book was released on 2005-12-17 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleomagnetic data are useful in many applications in Earth Science from determining paleocurrent directions to analyzing the long-term behavior of the geomagnetic field. In this book, an attempt has been made to draw together the various principles and practices within paleomagnetism in a consistent and up-to-date manner. It includes many practical examples that illustrate various applications of paleomagnetism. A companion software package implements the theory explained in the text. Audience: This volume is aimed at professional Earth Scientists using paleomagnetic data for their research. It is also suitable for use as a text book for students in courses with a paleomagnetic content. In addition, this volume will be of value to other professionals with an interest in the analysis of vector and tensor data in general.

Download or read book The Global Paleomagnetic Database written by Jo Lock and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Document Syntax Xl I. DATABASE DESIGN 1. Relational Databases 317 2. Choice of Database Management System 318 3. Design of the Global Paleomagnetic Database 319 3. 1. ORACLE Design 319 3. 2. Compact Database - ABASE 321 4. Aspects of Data Entry 326 II. ORACLE HARDWARE AND SOFTWARE 1. Sytem Hardware and Software Recommendation for ORACLE 328 1. 1. For a Fully IBM Compatible Personal Computer (PC) 328 1. 2. For an Apple Macintosh PC 329 1. 3. Recommendations 330 2. ORACLE RDBMS Software Used By the GPMDB 331 2. 1. A Brief Description of the ORACLE RDBMS 331 2. 2. SQL *Plus under MS-DOS 333 2. 3. SQL *Forms under MS-DOS 336 2. 4. SQL *Menu under MS-DOS 338 2. 5. The . CRT File 339 III. DATABASE INSTALLATION AND MAINTENANCE 1. The Role of the Database Administrator 340 2. Preparing Your PC for the Installation of ORACLE RDBMS 340 2. 1. ORACLE RDBMS for MS-DOS and Extended Memory 340 2. 2. Setting up MS-DOS for ORACLE 342 3. Installing the ORACLE RDBMS 347 3. 1. ORACLE Directory Structure 347 3. 2. Installing the ORACLE RDBMS for MS-DOS 348 3. 3. Step by Step ORACLE RDBMS Installation Instructions 348 4. System Preparation and Loading the Global Paleomagnetic Da- base 353 4. 1. System Preparation 353 4. 2. Installing the Global Paleomagnetic Database 356 4. 3. Loading the Custombuilt Files 358 v SUI\. IJ\IARY vi 5. Database Administrative Tasks 363 5. 1.

Download or read book Visualization Approaches to the Analysis and Display of Paleomagnetic Data written by Elizabeth R. Jurrus and published by . This book was released on 1999 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Palaeomagnetic Database written by J. D. A. Piper and published by Wiley. This book was released on 1991-08-15 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an in-depth analysis of global paleomagnetic results from the earliest studies right up to mid 1987. Reconstructing the movements of each plate over geological time, then developing corresponding paleography of the past requires a time sequence of paleomagnetic poles for each of the tectonic divisions comprising the total crustal area. This database presents worldwide paleomagnetic information in just such a form with data listed plate by plate, in order of decreasing geologic age.

Download or read book Encyclopedia of Solid Earth Geophysics written by Harsh Gupta and published by Springer Science & Business Media. This book was released on 2011-06-29 with total page 1579 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past few decades have witnessed the growth of the Earth Sciences in the pursuit of knowledge and understanding of the planet that we live on. This development addresses the challenging endeavor to enrich human lives with the bounties of Nature as well as to preserve the planet for the generations to come. Solid Earth Geophysics aspires to define and quantify the internal structure and processes of the Earth in terms of the principles of physics and forms the intrinsic framework, which other allied disciplines utilize for more specific investigations. The first edition of the Encyclopedia of Solid Earth Geophysics was published in 1989 by Van Nostrand Reinhold publishing company. More than two decades later, this new volume, edited by Prof. Harsh K. Gupta, represents a thoroughly revised and expanded reference work. It brings together more than 200 articles covering established and new concepts of Geophysics across the various sub-disciplines such as Gravity, Geodesy, Geomagnetism, Seismology, Seismics, Deep Earth Processes, Plate Tectonics, Thermal Domains, Computational Methods, etc. in a systematic and consistent format and standard. It is an authoritative and current reference source with extraordinary width of scope. It draws its unique strength from the expert contributions of editors and authors across the globe. It is designed to serve as a valuable and cherished source of information for current and future generations of professionals.

Download or read book Ancient Supercontinents and the Paleogeography of Earth written by Lauri J. J Pesonen and published by Elsevier. This book was released on 2021-10-06 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ancient Supercontinents and the Paleogeography of Earth offers a systematic examination of Precambrian cratons and supercontinents. Through detailed maps of drift histories and paleogeography of each continent, this book examines topics related to Earth’s tectonic evolution prior to Pangea, including plate kinematics, orogenic development, and paleoenvironments. Additionally, this book discusses the methodologies used, principally paleomagnetism and tectonostratigraphy, and addresses geophysical topics of mantle dynamics and geodynamo evolution over billions of years. Structured clearly with consistent coverage for Precambrian cratons, this book combines state-of-the-art paleomagnetic and geochronologic data to reconstruct the paleogeography of the Earth in the context of major climatic events such as global glaciations. It is an ideal, up-to-date reference for geoscientists and geographers looking for answers to questions surrounding the tectonic evolution of Earth. Provides robust paleogeographies of Precambrian cratons based on high-quality paleomagnetic and geochronologic data and critically tested by global geological datasets Includes links to updated databases for the Precambrian such as PALEOMAGIA and the Global Paleomagnetic Database (GPMDB) Presents full-color maps of the drift histories of each continent as well as their paleogeographies Discusses key questions regarding continental drift, the supercontinent cycle, and the geomagnetic dipole hypothesis and analyzes palaeography in the context of Earth’s holistic evolution

Download or read book The Continental Drift Controversy Volume 2 Paleomagnetism and Confirmation of Drift written by Henry R. Frankel and published by Cambridge University Press. This book was released on 2012-04-26 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resolution of the sixty-year debate over continental drift, culminating in the triumph of plate tectonics, changed the very fabric of Earth science. This four-volume treatise on the continental drift controversy is the first complete history of the origin, debate and gradual acceptance of this revolutionary theory. Based on extensive interviews, archival papers and original works, Frankel weaves together the lives and work of the scientists involved, producing an accessible narrative for scientists and non-scientists alike. This second volume provides the first extensive account of the growing paleomagnetic case for continental drift in the 1950s and the development of apparent polar wander paths that showed how the continents had changed their positions relative to one another, more or less as Wegener had proposed. Paleomagnetism offered the first physical measure that continental drift had occurred and helped determine the changing latitudes of the continents through geologic time.

Download or read book Encyclopedia of Geomagnetism and Paleomagnetism written by David Gubbins and published by Springer Science & Business Media. This book was released on 2007-07-19 with total page 1061 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference encompasses the fields of Geomagnetism and Paleomagnetism in a single volume. Both sciences have applications in navigation, in the search for minerals and hydrocarbons, in dating rock sequences, and in unraveling past geologic movements such as plate motions they have contributed to a better understanding of the Earth. The book describes in fine detail the current state of knowledge and provides an up-to-date synthesis of the most basic concepts. It is an indispensable working tool not only for geophysicists and geophysics students but also for geologists, physicists, atmospheric and environmental scientists, and engineers.

Download or read book Paleomagnetism of Sedimentary Rocks written by Kenneth P. Kodama and published by John Wiley & Sons. This book was released on 2012-08-24 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the paleomagnetism of sediments and sedimentary rocks, how sediments and sedimentary rocks become magnetized, and how the physical and chemical processes involved can affect the accuracy of paleomagnetism. Topics covered include depositional and post-depositional remanence acquisition, the detection and correction of compaction-caused inclination shallowing, reduction diagenesis of magnetic minerals, chemical remagnetization, and rotation of remanence by grain-scale rock strain. The book also has a chapter on environmental paleomagnetism, including examples of the new technique of high-resolution rock magnetic cyclostratigraphy and its application to sedimentary sequences. By emphasising the accuracy of sedimentary paleomagnetism and the magnitude of post-depositional processes that can affect it, the book will be invaluable in the geologic interpretation of sedimentary paleomagnetic data. Paleomagnetism of Sedimentary Rocks will be welcomed by paleomagnetists, students of paleomagnetism and all Earth scientists who use sedimentary paleomagnetic data in their research. Additional resources for this book can be found at: www.wiley.com/go/kodama/paleomagnetism.

Download or read book Recent Advances in Rock Magnetism Environmental Magnetism and Paleomagnetism written by Danis Nurgaliev and published by Springer. This book was released on 2018-08-14 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a collection of papers presented in the International Conference on Geomagnetism, Paleomagnetism and Rock Magnetism held in Kazan (Russia) in October 2017. Papers in this book are dedicated to the study of the geomagnetic field through most of the Earth's history as well as planetary and meteorite magnetism, and magnetic signatures of terrestrial impact craters. Recent studies, summaries, and reviews include: 1 - theory of the geomagnetic field, its generation and variations; 2 - experimental data on the geomagnetic field changes; 3 – studies of rock magnetism; 4 – paleotectonic reconstructions and paleoceanography; 5 – magnetostratigraphy; 6 – extraterrestrial magnetism. Summary reports and reviews will be presented by the world’s leading experts in the field of geomagnetic studies. Such workshops held by Academic Council have become traditional. They are always attended by leading professionals from Russia, CIS and non-CIS countries. In addition to discussion sessions focused on recent studies and findings, lectures on some basic concepts of geomagnetism will be delivered by leading Russian and foreign scientists

Download or read book Paleomagnetology written by Aleksey N. Khramov and published by Springer. This book was released on 1987-10-15 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the basic principles and methods of paleomagnetology and gives a systematic description of paleomagnetic phenomena such as geomagnetic reversals, paleosecular variations, long-term intensity changes and apparent polar wandering paths. Special emphasis is laid on results obtained from research work done in the Soviet Union. Together with data from other parts of the world they allow the critical discussion of aspects of magnetostratigraphy, plate tectonics and accretion tectonics. In diesem Buch werden grundlegende Fragen der Paläomagnetologie und des Paläomagnetismus abgehandelt. Durch die Einbeziehung zahlreicher Daten aus der Sowjetunion werden Probleme der Magnetostratigraphie sowie der Platten- und Akkretionstektonik kritisch beleuchtet.

Download or read book New Developments in Paleomagnetism Research written by Lev V. Eppelbaum and published by . This book was released on 2015 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleomagnetic field analysis occupies a separate place in the variety of studied physical parameters, since it assists us in obtaining specific 'stamps' of past geomagnetic field configurations. It is well-known that life on Earth and all geological-environmental processes occur in the changing geomagnetic field (the Earth's magnetic field intensity is now decreasing). Geological-geophysical records indicate that hundreds and hundreds of Earth's magnetic field reversals have occurred. Paleomagnetic research has revealed information about ancient (from hundreds to billions years ago) magnetic field changes, which reflects definite geological, archaeological, cosmological and environmental events of that time. Some geodynamic and tectonic information derived from paleomagnetic field analysis cannot be obtained by any other geophysical or geological methods. This book reveals the current understanding of leading scientists studying paleomagnetic on new approaches and results in different regions of the world. Three main issues are presented in the book: a comparison of the Earth's geomagnetic field and the Earth's biota evolution processes over the last 2.5 billion years (Chapter 1); combined paleomagnetic mapping examples of some areas of the Eastern Mediterranean (Chapter 2); various aspects of archaeomagnetic artifact examination, including advanced mathematical approach applications (Chapters 3 and 4); and utilization of geomagnetic data from the past for historical reconstruction of China and Mesoamerica (Chapter 5). The five chapters present results of investigations of scientists from different scientific schools and demonstrate the application of various methods and approaches to analyze ancient and comparatively recent geomagnetic fields. Undoubtedly, these results are interesting both from theoretical and practical points of view. This book is intended for students of corresponding specialties, geologists, geophysicists, archaeologists and environmental scientists. This book can also be of interest to the general public interested in paleomagnetism, archaeology, geology and geophysics.

Download or read book Tectonic Evolution of the Moroccan High Atlas A Paleomagnetic Perspective written by Pablo Calvín and published by Springer Nature. This book was released on 2023-01-29 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a significant amount of structural, paleomagnetic and magnetic fabric data in the Central High Atlas (Morocco). The authors thoroughly described and analyzed the present-day structure of this intraplate chain through 22 of cross-sections, potential field data analysis and 3D reconstruction. In addition, the authors propose a palinspastic reconstruction of the structure of the basin at 100 Ma (i.e., post-extension and pre-compression) to finally evaluate its Mesozoic and Cenozoic geodynamic evolution. This books presents (1) a unique three-dimensional model at the chain scale, (2) an analysis of the ca. 100 Ma remagnetization, to perform palinspastic restorations of most representative structures, (3) as well as the interpretation of the magnetic fabrics in order to unravel the tectonic or deformation setting that the rocks underwent in different parts of the basin. This book is of interest to structural geologists in Northern Africa, the Mediterranean and Iberia, as well as to those interested in inverted intraplate basins and paleomagnetists from around the planet. Also, this book is intended to help students to understand better the geological evolution of the Atlas and therefore Morocco and surrounding areas.