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Author: Manik Talwani
Publisher: American Geophysical Union
Published: 1977
Total Pages: 496
ISBN-13:
DOWNLOAD EBOOKProceedings of a symposium held in honor of Maurice Ewing at Arden House, Harriman, N.Y. on March 28-31, 1976.
Author: A. Sugimura
Publisher: Elsevier
Published: 2013-10-22
Total Pages: 256
ISBN-13: 1483256936
DOWNLOAD EBOOKDevelopments in Geotectonics, 3: Island Arcs: Japan and its Environs focuses on geophysical and geological characteristics of island arcs. The book first reviews the geophysical and geological features of island arcs, including topography, crust and upper mantle structure, seismicity, direction of principal stresses of earthquakes, crustal deformation and fault systems, and geological structure. The distributions of Cenozoic volcanoes and hot springs, petrology of volcanic rocks, magnetic fields, and anomaly of electrical conductivity are also discussed. The publication also takes a look at the Cenozoic history of the Japanese Islands relative to the formation of island arcs. The Quaternary tectonic movements of Japan are reviewed. The text ponders on the processes under island arcs, such as generation and ascent of primary magma; convection current descending under island arcs; island arc tectonics and oceanic ridge tectonics; and mechanical process inferred from seismic wave radiation. The text is a valuable reference for geologists and readers interested in island arcs.
Author: F.-C. Wezel
Publisher: Elsevier
Published: 2013-10-22
Total Pages: 598
ISBN-13: 1483289966
DOWNLOAD EBOOKThis 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.
Author: Creighton A. Burk
Publisher:
Published: 1965
Total Pages: 250
ISBN-13:
DOWNLOAD EBOOKThis report describes the geologic history and structural configuration of the Alaska Peninsula. A geological map at a scale of 1:250,000 presents in detail the results of recent field investigations in the Alaska Peninsula and adjacent Pacific Islands. A tectonic map incorporating this new information, at a scale of 1:1,000,000, shows the structural configuration of the Alaska Peninsula area. The text is devoted largely to a presentation of basic stratigraphic relationships and to an interpretation of the structural features and history of the Alaska Peninsula. (Author).
Author: Arnold L. Gordon
Publisher: Elsevier
Published: 2013-10-22
Total Pages: 227
ISBN-13: 1483226492
DOWNLOAD EBOOKAnnals of the International Geophysical Year, Volume 46: Oceanography covers the program of oceanographic studies conducted during the International Geophysical Year (IGY). The program includes long wave and sea level recording, deep water circulation, polar front survey, and multipleship current measurement. This book is composed of six chapters and begins with the objective and aims of the oceanographic program and the national contributions to this program. The succeeding chapters discuss the problem in delineating sea-level cycle and the results of the North Atlantic Polar Front Survey in the IGY. These topics are followed by a survey of the results from many oceanographical expeditions. Particularly good results were obtained during the IGY period by the use of special large-scale precision automatic recorders of the phototelegraph station type. The last chapter describes the artificial radioactivity in the oceans consisting mainly of fission products of U235, Pu239 and U238 from reactors and nuclear explosion devices. This book is of value to geophysicists, and marine scientists and researchers.
Author: Ocean Drilling Program
Publisher:
Published: 1990
Total Pages: 1160
ISBN-13:
DOWNLOAD EBOOKAuthor: William R. Dickinson
Publisher: Geological Society of America
Published: 2006-01-01
Total Pages: 176
ISBN-13: 0813724066
DOWNLOAD EBOOK"Oceanian ceramic cultures making earthenware pottery spread during the past 3500 years through a dozen major island groups spanning 6000 km of the tropical Pacific Ocean from western Micronesia to western Polynesia. Island potters mixed sand as temper into clay bodies during ceramic manufacture. The nature of island sands is governed by the geotectonics of hotspot chains, island arcs, subduction zones, backarc basins, and remnant arcs as well as by sedimentology. Because small islands with bedrock exposures of restricted character are virtual point sources of sand, many tempers are diagnostic of specific islands. Petrographic study of temper sands in thin section allows distinction between indigenous pottery and exotic pottery transported from elsewhere. Study of 2223 prehistoric Oceanian potsherds from 130 islands and island clusters indicates the nature of Oceanian temper types and documents 105 cases of interisland transport of ceramics over distances typically
Author: Andrew Goudie
Publisher: Routledge
Published: 2013-04-15
Total Pages: 1190
ISBN-13: 1134482760
DOWNLOAD EBOOKVolume editor is the leading authority in the field Alphabetically organized in two volumes c.700 comprehensively signed, cross-referenced and indexed entries Detailed bibliographies and suggestions for further reading follow most entries Fully illustrated: over 300 plates and line drawings Written by an editorial team of over 270 experts from over thirty countries
Author: C.A. Burk
Publisher: Springer
Published: 2013-12-20
Total Pages: 976
ISBN-13: 3662011417
DOWNLOAD EBOOKThe continental margins of the world constitute the most impressive and largest physiographic feature of the earth's surface, and one of fundamentally great geological significance. Continental margins have been the subject of increasing attention in recent years, an interest focused by a body of new data that has provided new insights into their character. This interest was further stimulated by the realization that, in addition to the abundant living resources, continental margins contain petroleum and mineral resources that are accessible with existing technology. This realization, along with their basic geological importance, has provoked further research into the nature of continental margins throughout the world. A summary of these findings, as related to both recent and ancient continental margins, is the subject of this book. At various times in the past we had been approached individually to prepare a basic reference to continental margins; we then proposed to do such a volume jointly. However, the stimulus for the present volume eventually arose from a Penrose Conference arranged through the Geological Society of America. This conference was attended by specialists of numerous disciplines and from throughout the world, many of whom insisted that such a volume would be both timely and useful. Consequently, we agreed to undertake the task of assembling this book, with the objectives of making it available as soon and as inexpensively as possible.
Author: Ahmed Hassan Ahmed
Publisher: Springer Nature
Published: 2022-03-18
Total Pages: 532
ISBN-13: 3030964434
DOWNLOAD EBOOKThis book presents a detailed review of the mineral deposits and occurrences in the Arabian-Nubian Shield (ANS), including their distribution, mineralization styles, economic importance, and geological controls on the mineralization. The purpose of the book is to compile the results of past and recent investigations on mineral deposits and occurrences in the ANS that covering the countries of (Saudi Arabia, Yemen, Egypt, Sudan, Eritrea, and Ethiopia). In this regard, it discusses in detail the various genetic mineralization styles in the ANS including: (1) magmatic mineral deposits associated with mafic-ultramafic rocks (e.g. chromite, Ni-Cu-Co-PGE magmatic sulfides, Fe-Ti-V oxides), (2) intrusion-related (magmatic-hydrothermal) deposits associated with felsic to intermediate rocks (porphyry, epithermal Au-Ag/sulfide vein type family, skarn, granite-related pegmatite-REE deposits), (3) hydrothermal orogenic gold and volcanogenic massive sulfide (VMS) deposits, as well as (4) surficial mineral deposits (chemical-sedimentary, residual, mechanical and supergene enrichment deposits).
