Download or read book Magma Genesis Along an Arc Transform Transition Zone written by Thomas Skulski and published by . This book was released on 1990 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Wrangell volcanic belt lies in a transpressional zone that results from the oblique convergence between the NE Pacific and North American plates. Transitional lavas predominate in the SE transform regime, whereas a calc-alkaline arc lies to the NW. The geochemical evolution of the St. Clare Creek field (Yukon) reflects changes in mode of crustal interaction and nature of mantle source components. The Wolverine centre (18-16 Ma) consists of alkaline and voluminous transitional lavas overlain by calc-alkaline lavas. The Klutlan centre (16-10 Ma) comprises calc-alkaline and Fe-rich transitional lavas followed by voluminous Fe-poor transitional basalts and more felsic transitional lavas. Primitive Fe-rich Wolverine transitional and alkaline lavas have higher Nb/Y ratios relative to Klutlan lavas, suggesting an enriched lithospheric mantle source with high [symbol]Sr/[symbol]Sr (0.7042) and low K/Nb ratios. Younger Fe-poor transitional lavas have high K/Nb ratios similar to calc-alkaline lavas. The Klutlan calc-alkaline lavas have high K/Nb ratios and low [symbol]Sr/[symbol]Sr ratios ($ sim$0.7035) derived from a slab component. Depleted Klutlan basalts have low La/Yb, low [symbol]Sr/[symbol]Sr (0.7031) and high $ sp{143}$Nd/$ sp{144}$Nd (0.5131) ratios reflecting an origin in the depleted asthenospheric mantle. Mixing between enriched, slab-derived, and depleted mantle components accounts for the trace element and isotopic composition of primitive transitional magmas, whereas different degrees of partial melting of depleted mantle are required to explain the range of Fe contents. Crustal assimilation accompanied the differentiation of early evolved Wolverine alkaline and late Klutlan transitional lavas. Selective contamination resulted in K-enrichment of evolved intervening transitional lavas." --
Download or read book Magma Genesis and Slab wedge Interaction Across an Island Arc continent Collision Zone East Sunda Arc Indonesia written by Jurian Adriaan Hoogewerff and published by . This book was released on 1999 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CIM Bulletin written by Canadian Institute of Mining and Metallurgy and published by . This book was released on 1994 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Backarc Basins written by Brian Taylor and published by Springer Science & Business Media. This book was released on 1995-05-31 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Role of Volatiles in the Genesis Evolution and Eruption of Arc Magmas written by G.F. Zellmer and published by Geological Society of London. This book was released on 2015-03-17 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subduction zone volatile cycle is key to understanding the petrogenesis, transport, storage and eruption of arc magmas. Volatiles control the flux of slab components into the mantle wedge, are responsible for melt generation through lowering the solidi of mantle materials and influence the crystallizing phase assemblages in the overriding crust. Further, the rates and extents of degassing during magma storage and decompression affect magma rheology, ultimately control eruption style and have consequences for the environmental impact of explosive arc volcanism. This book highlights recent progress in constraining the role of volatiles in magmatic processes. Individual book sections are devoted to tracing volatiles from the subducting slab to the overriding crust, their role in subvolcanic processes and eruption triggering, as well as magmatic-hydrothermal systems and volcanic degassing. For the first time, all aspects of the overarching theme of volatile cycling are covered in detail within a single volume.
Download or read book CIM Bulletin written by Canadian Institute of Mining, Metallurgy and Petroleum and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Islands written by Rosemary Gillespie and published by Univ of California Press. This book was released on 2009-08-19 with total page 1110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Islands have captured the imagination of scientists and the public for centuries—unique and rare environments, their isolation makes them natural laboratories for ecology and evolution. This authoritative, alphabetically arranged reference, featuring more than 200 succinct articles by leading scientists from around the world, provides broad coverage of all the island sciences. But what exactly is an island? The volume editors define it here as any discrete habitat isolated from other habitats by inhospitable surroundings. The Encyclopedia of Islands examines many such insular settings—oceanic and continental islands as well as places such as caves, mountaintops, and whale falls at the bottom of the ocean. This essential, one-stop resource, extensively illustrated with color photographs, clear maps, and graphics will introduce island science to a wide audience and spur further research on some of the planet's most fascinating habitats.
Download or read book Magma Genesis in the Izu Arc written by Debra Renee Prinkey and published by . This book was released on 2003 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatise on Geochemistry written by and published by Newnes. This book was released on 2013-10-19 with total page 14787 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensively updated new edition of the widely acclaimed Treatise on Geochemistry has increased its coverage beyond the wide range of geochemical subject areas in the first edition, with five new volumes which include: the history of the atmosphere, geochemistry of mineral deposits, archaeology and anthropology, organic geochemistry and analytical geochemistry. In addition, the original Volume 1 on "Meteorites, Comets, and Planets" was expanded into two separate volumes dealing with meteorites and planets, respectively. These additions increased the number of volumes in the Treatise from 9 to 15 with the index/appendices volume remaining as the last volume (Volume 16). Each of the original volumes was scrutinized by the appropriate volume editors, with respect to necessary revisions as well as additions and deletions. As a result, 27% were republished without major changes, 66% were revised and 126 new chapters were added. In a many-faceted field such as Geochemistry, explaining and understanding how one sub-field relates to another is key. Instructors will find the complete overviews with extensive cross-referencing useful additions to their course packs and students will benefit from the contextual organization of the subject matter Six new volumes added and 66% updated from 1st edition. The Editors of this work have taken every measure to include the many suggestions received from readers and ensure comprehensiveness of coverage and added value in this 2nd edition The esteemed Board of Volume Editors and Editors-in-Chief worked cohesively to ensure a uniform and consistent approach to the content, which is an amazing accomplishment for a 15-volume work (16 volumes including index volume)!
Download or read book Ophiolite Concept and the Evolution of Geological Thought written by Yildirim Dilek and published by Geological Society of America. This book was released on 2003-01-01 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tectonic Development of the Eastern Mediterranean Region written by A. H. F. Robertson and published by Geological Society of London. This book was released on 2006 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Mediterranean region is a classic area for the study of tectonic processes and settings related to the development of the Tethyan orogenic belt. The present set of research and synthesis papers by earth scientists from countries in this region and others provides an up-to-date, interdisciplinary overview of the tectonic development of the Eastern Mediterranean region from Precambrian to Recent. Key topics include continental rifting, ophiolite genesis and emplacement, continental collision, extensional tectonics, crustal exhumation and intra-plate deformation (e.g. active faulting). Alternative tectonic reconstructions of the Tethyan orogen are presented and discussed, with important implications for other regions of the world. The book will be an essential source of information and interpretation for academic researchers (geologists and geophysicists), advanced undergraduates and also for industry professionals, including those concerned with hydrocarbons, minerals and geological hazards (e.g. earthquakes).
Download or read book Magma Redox Geochemistry written by Roberto Moretti and published by John Wiley & Sons. This book was released on 2021-10-26 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the many facets of redox exchanges that drive magma's behavior and evolution, from the origin of the Earth until today The redox state is one of the master variables behind the Earth's forming processes, which at depth concern magma as the major transport agent. Understanding redox exchanges in magmas is pivotal for reconstructing the history and compositional make-up of our planet, for exploring its mineral resources, and for monitoring and forecasting volcanic activity. Magma Redox Geochemistry describes the multiple facets of redox reactions in the magmatic realm and presents experimental results, theoretical approaches, and unconventional and novel techniques. Volume highlights include: Redox state and oxygen fugacity: so close, so far Redox processes from Earth’s accretion to global geodynamics Redox evolution from the magma source to volcanic emissions Redox characterization of elements and their isotopes The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
Download or read book Ophiolites in Earth History written by Yildirim Dilek and published by Geological Society of London. This book was released on 2003 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 32 papers in this volume examine the mode and nature of igneous, metamorphic, tectonic, sedimentological, and biological processes associated with the evolution of oceanic crust in different tectonic settings in Earth history as revealed in various ophiolites and ophiolite belts around the world, and the geodynamic significance of these ophiolites in the evolution of different orogenic systems. Divided into six thematic sections, the book presents a wealth of new data and syntheses from mainly Phanerozoic ophiolites around the world.
Download or read book Arc Continent Collision written by Dennis Brown and published by Springer Science & Business Media. This book was released on 2011-06-29 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arc-continent collision has been one of the important tectonic processes in the formation of mountain belts throughout geological time, and it continues to be so today along tectonically active plate boundaries such as those in the SW Pacific or the Caribbean. Arc-continent collision is thought to have been one of the most important process involved in the growth of the continental crust over geological time, and may also play an important role in its recycling back into the mantle via subduction. Understanding the geological processes that take place during arc-continent collision is therefore of importance for our understanding of how collisional orogens evolve and how the continental crust grows or is destroyed. Furthermore, zones of arc-continent collision are producers of much of the worlds primary economic wealth in the form of minerals, so understanding the processes that take place during these tectonic events is of importance in modeling how this mineral wealth is formed and preserved. This book brings together seventeen papers that are dedicated to the investigation of the tectonic processes that take place during arc-continent collision. It is divided into four sections that deal firstly with the main players involved in any arc-continent collision; the continental margin, the subduction zone, and finally the volcanic arc and its mineral deposits. The second section presents eight examples of arc-continent collisions that range from being currently active through to Palaeoproterozoic in age. The third section contains two papers, one that deals with the obduction of large-slab ophiolites and a second that presents a wide range of physical models of arc-continent collision. The fourth section brings everything that comes before together into a discussion of the processes of arc-continent collision.
Download or read book Magma genesis in the New Britain island arc written by J.D. WOODHEAD and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ophiolites and Oceanic Crust written by Yildirim Dilek and published by Geological Society of America. This book was released on 2000-01-01 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings from the September 1998 conference in Marshall, California contain 39 papers on the following topics: ophiolites, ocean crust, and global tectonics; oceanic lower crust and upper mantle; structure and physical properties of upper oceanic crust; hydrothermal processes; Pacific Rim ophiolites; and, Ophiolites from Iapetus, Rheic-Pleionic, Neotethyan, and Indian Oceans. Contributors include scientists with backgrounds in structural geology, tectonics, geophysics, petrology, and geochemistry. Numerous black and white illustrations (and one in color) are included. Annotation copyrighted by Book News Inc., Portland, OR
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
