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Developments in Geotectonics, 16: Recent Crustal Movements, 1979 covers the proceedings of the IUGG Interdisciplinary Symposium No. 9, ""Recent Crustal Movements"", held in Canberra, A.C.T., Australia on December 13-14, 1979. The book focuses on instruments and methods for the determination of crustal movements; methods of evaluating crustal movements; and interpretation of the crustal structure and crustal movements with the assistance of other geophysical data. The selection first offers information on the design and error characteristics of a fundamental global geodetic network; state and prospects of development of high-precision geodetic methods for studying crustal movements; and interferometric techniques for measuring horizontal earth crustal movements. The text then takes a look at the vertical crustal movements of the Carpatho-Balkan region and height changes and vertical crustal movements in Western German areas. Discussions focus on vertical movements map, instrumental improvements for the observation of vertical crustal movements, and map of height changes and vertical crustal movements. The text ponders on the episodic block motion and convergence along the Calaveras fault in central California and complete determination of local crustal deformation from geodetic observations. The selection is a valuable source of data for geologists and readers interested in crustal movements.
Recent Crustal Movements, 1977 is a compilation of the proceedings of the Sixth International Symposium on Recent Crust Movements. This volume is comprised of 50 papers and 38 abstracts, in addition to a special report about the RCM Symposium and the report of the Fennoscandian Subcommission. This volume is subdivided into eight parts. The first part presents the opening remarks at the symposium and the special report of the Fennoscandian Subcommission of the Commission on Recent Crustal Movements. Locations included in this report are the Estonian Soviet Socialist Republic, Finland, Sweden, Denmark, and Norway. Part two is about crustal deformation using extra-terrestrial geodesy. Part three explores the measurement of strain, tilt and gravity. The observed vertical crustal deformation is the focus of the fourth part. The second half of this volume focuses on geologic studies of Holocene deformation; observed horizontal crustal deformation; seismology; and, finally, experimental and theoretical models of interferometric methods for the measurement of distance in the study of recent crustal movements.
Developments in Geotectonics, Volume 20: Recent Crustal Movements, 1982 presents the proceedings of the 3rd Symposium on Recent Crustal Movements and Phenomena Associated with Earthquakes and Volcanism, held in Tokyo, Japan on May 12–13, 1982. This book presents the results in crustal movement studies at a local or regional scale. Organized into four parts encompassing 45 chapters, this volume begins with an overview of the gravimetric research carried out in various locations in Maracaibo Basin Area. This text then evaluates the reliability of the leveling measurements using modified geodetic checks as well as through comparison with independent measurements of crustal movement. Other chapters consider the basis of geodetic strain analysis. This book discusses as well the first-order geodetic measurements in seismically active areas in southern and southwestern Australia. The final chapter deals with the correlation of the data of relevelling with surface relief. This book is a valuable resource for engineers and geologists.
This multi-author book has been prepared by an international group of geoscientists that have been active in rift research since the late 1960s. In 1984, an informal, grass-roots study group was initiated to compare individual research results and to explore in greater depth the apparent differences and similarities in the interpretations from various rift systems. The group became known as the CREST working group, an acronym of Continental Rifts: Evolution, Structure and Tectonics, which not surprisingly became the title of this book.Continental Rifts: Evolution, Structure, Tectonics presents an overview of the present state of understanding and knowledge of the processes of continental rifting from a multidisciplinary, lithospheric scale perspective. The chapters have been structured on each rift system in approximately the same synoptic sequence, so as to facilitate comparisons of rifts by the reader. The book complements its predecessors by presenting a more unified picture. It succeeds in presenting the status of a representative majority of the continental rift systems that have been at the forefront of recent research. For students and experienced researchers alike, this book will be of significant value in assessing the current state of knowledge and in serving as a framework for future research.
International Lithosphere Program; Publ. No. 0104
The ensemble of manuscripts presented in this special volume captures the stimulating cross-disciplinary dialogue from the International Symposium on Deep Structure, Composition, and Evolution of Continents, Harvard University, Cambridge, Massachusetts, 15-17 October 1997. It will provide an update on recent research developments and serve as a starting point for research of the many outstanding issues.After its formation at mid-oceanic spreading centers, oceanic lithosphere cools, thickens, and subsides, until it subducts into the deep mantle beneath convergent margins. As a result of this continuous recycling process oceanic lithosphere is typically less than 200 million years old (the global average is about 80 Myr). A comprehensive, multi-disciplinary study of continents involves a wide range of length scales: tiny rock samples and diamond inclusions may yield isotope and trace element signatures diagnostic for the formation age and evolution of (parts of) cratons, while geophysical techniques (e.g., seismic and electromagnetic imaging) constrain variations of elastic and conductive properties over length scales ranging from several to many thousand kilometers. Integrating and reconciling this information is far from trivial and, as several papers in this volume document, the relationships between, for instance, formation age and tectonic behavior on the one hand and the seismic signature, heat flow, and petrology on the other may not be uniform but may vary both within as well as between cratons. These observations complicate attempts to determine the variations of one particular observable (e.g., heat flow, lithosphere thickness) as a function of another (e.g., crustal age) on the basis of global data compilations and tectonic regionalizations.Important conclusions of the work presented here are that (1) continental deformation, for instance shortening, is not restricted to the crust but also involves the lithospheric mantle; (2) the high wavespeed part of continental lithospheric mantle is probably thinner than inferred previously from vertically travelling body waves or form global surface-wave models; and (3) the seismic signature of ancient continents is more complex than expected from a uniform relationship with crustal age.
This volume contains a collection of papers presented as distinguished guest lectures at the International Conference on ``The Origin of Arcs'' held at the University of Urbino in September 1986, under the joint sponsorship of the European Union of Geosciences and the Italian Geological Society. The workshop on island and mountain arcs has been organized with the aim of increasing our understanding of the intrinsic nature of orogenic and post-orogenic processes, on the basis of empiric factual data, rather than particular theoretic models. Quite often a trivial piece of field data appears to bear much more weight than many fascinating hypotheses put forward by the human mind. This seems to be much more valid in geology, where a special method is necessitated by the particular nature of the geological phenomena and the time concept. Every general law deduced should be rooted in the study of the earth's development in geological time. It is the editor's opinion that there must first be an inductive picture by means of geological methods and then it must be interpreted by geophysicists in the light of physical laws. The geological method must serve, besides, to test the historical credibility of geophysical theories. It is clear that these two methods, the geological-historical one and the geophysical one, must be complementary and the one must not substitute the other. Since the problem of the structure and origin of arcs is open to several solutions, different factors being still unexplained, all correctly deduced opinions are considered by the editor. The contributors to this pre-conference volume have been asked to present essential geological results, as concrete as possible, on some basic problems, such as: Are the island and mountain arcs primary or induced features? How have these orogenic festoons developed into their similar regular shapes? What are the relationships between "primary" active arcs and "secondary" mountain arcs? What is the dominant deformational factor in the bulging of the arc? What is the real nature and tectonic significance of the Benioff zone? These papers have been grouped into five more or less natural sections, of which three are defined on the basis of geography. But of course several range broadly and the classification serves only to channel the discussion in a practical way.