Author: L. M. Parson
Publisher:
ISBN:
Category : Geology, Structural
Languages : en
Pages : 42

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Author: Brian Taylor
Publisher: Springer Science & Business Media
ISBN: 9780306449376
Category : Science
Languages : en
Pages : 560

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Experts in the field offer the first comprehensive review of the tectonics and magmatism of backarc basins, covering their initial rift stage to mature spreading. Complete with numerous illustrations, each of the twelve chapters focuses on a young, active backarc basin of the circum-Pacific-where volcano-tectonic processes are best studied because of their activity. Key themes in this volume include volcano-tectonics setting; cause and location; rift magmas; and hydrothermal activity. Researchers also present models of the dynamic processes occurring in backarc basins.

Author: Loren W. Kroenke
Publisher: Springer Science & Business Media
ISBN: 364285043X
Category : Science
Languages : en
Pages : 350

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Book Description
The Earth Science Series of the Circum-Pacific Funding for ship time was made available through Council for Energy and Mineral Resources (CPCEMR) the U. S. Agency for International Development, the is designed to convey the results of geologie research in USGS, the U. S. Office of Naval Research (for HIG's and around the Pacific Basin. Topies of interest include 1982 work), the Australian Development Assistance framework geology, petroleum geology, hard minerals, Bureau, the Australian Bureau of Mineral Resources geothermal energy, environmental geology, volcanology, (BMR), the New Zealand Ministry of Foreign Affairs, oceanography, tectonics, geophysies, geochemistry, and the New Zealand Departrnent of Scientific and Industrial applications of renewable energy. The CPCEMR sup Research (DSIR), the New Zealand Geological Survey, ports and publishes results of scientific research that will and the New Zealand Oceanographic Institute (NZOI). advance the knowledge of energy and mineral resource Coordination of the program was provided by the U. S. potential in the circum-Pacific region. The Earth Sci Departrnent of State and the South Pacific Applied Geo ence Series is specifically designed to publish papers that science Commission (SOPAC, formerly the United include new data and new maps, report on CPCEMR Nations-sponsored Committee for the Coordination of sponsored symposia and workshops, and describe the Joint Prospecting for Mineral Resources in South Pacific results of onshore and marine geological and geophysieal Offshore Areas CCOP/SOP AC) in Fiji. Over 150 scien explorations.

Author: J P Duffels
Publisher: BRILL
ISBN: 9004631313
Category : Architecture
Languages : en
Pages : 106

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Author: Brian Taylor
Publisher: American Geophysical Union
ISBN: 0875900453
Category : Science
Languages : en
Pages : 420

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Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 88. This volume focuses on the volcanic, fluid, sedimentary, and tectonic processes occurring in the trencharc-backarc systems of the western Pacific—a natural regional focus for studies of these themes. The results of ocean drilling and associated site surveys in the western Pacific have brought fundamental changes to our understanding of volcanism, crustal deformation, fluid circulation, and sedimentation in active margins and marginal basins. Our goal here is to synthesize the results of ocean drilling in a multi-disciplinary manner, including a comparison of the findings from drilling legs having similar themes, and to emphasize the significance of these results to the broader geoscience community.

Author: Ocean Drilling Program
Publisher:
ISBN:
Category : Borings
Languages : en
Pages : 728

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Vol. 174AX bound with Proceedings of the Ocean Drilling Program. Scientific results Vol. 174A.

Author: Robert D. Larter
Publisher: Geological Society of London
ISBN: 9781862391475
Category : Science
Languages : en
Pages : 362

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Recycling of oceanic plate back into the Earth's interior at subduction zones is one of the key processes in Earth evolution. Volcanic arcs, which form above subduction zones, are the most visible manifestations of plate tectonics, the convection mechanism by which the Earth loses excess heat. They are probably also the main location where new continental crust is formed, the so-called 'subduction factory' About 400f modern subduction zones on Earth are intra-oceanic. These subduction systems are generally simpler than those at continental margins as they commonly have a shorter history of subduction and their magmas are not contaminated by ancient sialic crust. They are therefore the optimum locations for studies of mantle processes and magmatic addition to the crust in subduction zones.

Author: Barbara Romanowicz
Publisher: Birkhäuser
ISBN: 3034887116
Category : Science
Languages : en
Pages : 490

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Book Description
Variations in seismic Q are sensitive to a much greater extent than are seismic velocity variations on factors such as temperature, fluid content, and the movement of solid state defects in the earth. For that reason an understanding of Q and its variation with position in the earth and with time should provide information in earth's tectonic evolution, as well as on aspects of its internal structure. Progress in understanding Q has suffered from difficulty in obtaining reliable amplitude data at global and temporary stations. Moreover, laboratory determinations of Q, until recently, were most often made at frequencies much higher than those measured by seismologists for waves propagating through the earth. Recent advances in seismic station distribution and quality, as well as in methodology at both high and low fequencies, have greatly improved the quality of observational data available to seismologists from global stations. Concurrent advances have been made in measuring Q using laboratory samples at frequencies that pertain to the earth and in theoretical understanding of seismic wave attenuation. Papers of this volume present new information on Q in the earth from several perspectives: methodology, results from global and regional observations of both body and surface waves, laboratory measurements, and theoretical understanding. The editors believe that we have reached a new threshold in Q studies and that advances in data quality and methodology will spur increased interest in this difficult, but interesting field.

Author: P.A. Floyd
Publisher: Springer Science & Business Media
ISBN: 9401130426
Category : Science
Languages : en
Pages : 470

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Book Description
Basalt is the most voluminous of all the igneous rocks. Extensive field, experimental, petrographic and geochemical studies of basalt have provided us with a considerable understanding of igneous petrogenesis, plate tectonics, and crust-mantle interaction and exchange. One important aspect of geology that has developed over the last few decades is the study of oceanic basalts. The ocean basins cover about two thirds of the earth's surface and are floored by a basement of oceanic basalt that is continuously undergoing generation at spreading centres and destruction at subduction zones, a process which throughout geological time is recognized as the principal means of generating new crust. The study of oceanic basalts enables us to understand better the generation and recycling of crustal materials (including the continental crust), and the exchange between oceanic crust and seawater via hydrothermal activity. Compositional variations displayed by oceanic basalts provide windows into the mantle, and the identification of isotopically-distinct mantle reservoirs demonstrates that the source of oceanic basalts is heterogeneous and is controlled by convection and reservoir interactions within the mantle.

Author: Robert J. Pankhurst
Publisher: Geological Society of London
ISBN: 9781862390218
Category : Science
Languages : en
Pages : 394

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Book Description
This text brings together multidisciplinary research and review papers on the Lower Palaeozoic geology of the Sierras Pampeanas and the Precordillera of central west Argentina. It deals with the final stages of assembly of the supercontinent of Gondwana and its tectonic interaction with Laurentia (the North American continent of today).