Описание: This book deals with the processes constituting the cycles of the phosphate and nitrogen compounds in sediment and the phosphate equilibria between the sediment and the overlying water. Sediment, to a large extent, controls the P- and N concentrations and thus primary production. In most waters, too high concentrations of these compounds cause excessive growth of algae, causing so-called eutrophication. Abatement of this can only be achieved after a complete understanding of the quantitative role of sediment in the P- and N cycle. Thus, for the phosphate cycle the following processes are evaluated: -P-binding onto sediments, viz., onto iron hydroxide and calcium carbonate (limestone), -Fractionation of phosphate in relation to its bioavailability, -Release processes under anoxic and oxic conditions, and their dependence on pH changes, -Further items taken into account, including the influence of drying of sediment and its resuspension by wind.For the nitrogen cycle, the following are discussed: -Ammonification of organically bound nitrogen, -Nitrification and denitrification, including Dissimilatory Nitrate Reduction, -Links with other chemical elements are made.
Описание: This book is written by a leading authority on the subject of magmatic sulfide deposits. An overview of deposit types, accompanied by a summary of the resources of nickel, copper and platinum-group elements in the worldвЂ™s principal known deposits, is followed by a summary of the relevant physical chemistry. The core of the book comprises a discussion about the geology and geochemistry of each of the deposit types in turn, accompanied by the implications of this data to the origin of the deposits in the light of our understanding of the chemical processes involved. A final chapter focuses on the use of the genetic concepts in exploration.
Описание: Examines various stream floods to determine which properties can be observed in settings and reconstructed through facies analysis from sedimentary -deposits. This book also examines This volume analyses the so-called cataclysmic floods because of their unusual geomorphic evidence.
Описание: Earth surface processes, landforms and sediment deposits are intimately related - involving erosion of rocks, generation of sediment, and transport and deposition of sediment through various Earth surface environments. These processes, and the landforms and deposits that they generate, have a fundamental bearing on engineering, environmental and public safety issues; on recovery of economic resources; and on our understanding of Earth history. This unique textbook brings together the traditional disciplines of sedimentology and geomorphology to explain Earth surface processes, landforms and sediment deposits in a comprehensive and integrated way. It is the ideal resource for a two-semester course in sedimentology, stratigraphy, geomorphology, and Earth surface processes from the intermediate undergraduate to beginning graduate level. The book is also accompanied by a website hosting illustrations and material on field and laboratory methods for measuring, describing and analyzing Earth surface processes, landforms and sediments.
Автор: Edited by P. J. Cook Название: Phosphate Deposits of the World ISBN: 0521619211 ISBN-13(EAN): 9780521619219 Издательство: Cambridge Academ Рейтинг: Цена: 14380 р. Наличие на складе: Поставка под заказ.
Описание: This unique survey describes the world’s ancient phosphorite deposits on a scale never previously attempted. The International Geological Correlation Programme started Project 156, on world phosphate resources, in 1977. An international team of forty-six researchers describes in twenty-five chapters almost 100 Precambrian or Cambrian deposits of phosphate rock, extending through all continents except Antarctica. The total resources are large, but only a small fraction is minable at present. The data presented give a good understanding of the distribution, nature and origin of phosphate deposits. The book is an important contribution to the scientific understanding of phosphate deposits, as well as a valuable aid to the search for an exploitation of phosphates in many parts of the world.
Автор: Edited by A. J. G. Notholt Название: Phosphate Deposits of the World ISBN: 052167333X ISBN-13(EAN): 9780521673334 Издательство: Cambridge Academ Рейтинг: Цена: 13694 р. Наличие на складе: Поставка под заказ.
Описание: This book is the second of four reference volumes which collectively describe the achievements of the International Geological Correlation Programme Project 156 (Phosphorites) during the ten years of the Project’s existence. Volume 2 contains 93 chapters contributed by 111 researchers, dealing with most, if not all, of the major individual deposits or phosphate fields of the world, whether of igneous or sedimentary origin. Total resources of phosphate rock are extremely large, but are unequally distributed geographically and only a relatively small proportion can be mined on an economic scale at present. The text is arranged on a continental basis, with an introductory chapter for each continent summarising the distribution of resources within the geological timescale. This unique volume provides a good understanding of the mode of occurrence, geological setting and phosphogenesis of the world’s phosphate resources. It forms an invaluable aid to the search for, and exploitation of, phosphate deposits in many countries.
Автор: Dahlkamp Название: Uranium Deposits of the World ISBN: 3540785531 ISBN-13(EAN): 9783540785538 Издательство: Springer Рейтинг: Цена: 57749 р. Наличие на складе: Поставка под заказ.
Описание: Uranium Deposits of the World, in three volumes, comprises an unprecedented compilation of data and descriptions of the uranium regions in Asia, USA, Latin America and Europe structured by countries.With this third, the Europe volume, Uranium Deposits of the World presents the most extensive data collection of the set. It covers about 140 uranium regions in more than 20 European countries with nearly 1000 mentioned uranium deposits. Each country and region receives an analytical overview followed by the geologically- and economically-relevant synopsis of the individual regions and fields. The presentations are structured in three major sections: (a) location and magnitude of uranium regions, districts, and deposits, (b) principal features of regions and districts, and (c) detailed characteristics of selected ore fields and deposits. This includes sections on geology, alteration, mineralization, shape and dimensions of deposits, isotopes data, ore control and recognition criteria, and metallogenesis.Beside the main European uranium regions, for example in the Czech Republic, Eastern Germany, France, the Iberian Peninsula or Ukraine, also small regions an districts to the point of singular occurrences of interest are considered. This by far the most comprehensive presentation of European uranium geology and mining would not be possible without the author’s access to extensive information covering the countries of the former Eastern Bloc states, which was partly not previously available. Abundantly illustrated with information-laden maps and charts throughout, this reference work is an indispensable tool for geologists, mining companies, government agencies, and others with an interest in European key natural resources. A great help for the reader’s orientation are the substantial bibliography of uranium-related publications and the indices, latter containing about 3900 entries in the geographical part alone.The three volumes of Uranium Deposits of the World are available as a set or individually. Also accessible (as a set and separate volumes) as an eReference on SpringerLink.com. The originally planned fourth volume with Australia, Oceania, and Africa will not be published after the author suddenly deceased.
Описание: Contents: Dynamic phenomena during underground mining of mineral deposits; Scientific reasoning of geodynamic zoning of mineral deposits; Method for studying the geodynamic state of a rock massif; Assessment of degree of potential burst hazards of deposits; Calculation of stresses in rock massif; Prevention of rock bursts.
Описание: Final report of the Commission on Genesis and Lithology of Glacial Quaternary Deposits of the International Union for Quaternary Research (INQUA).
Автор: Ehlers Название: Glacial Deposits in North-West Europe ISBN: 9061912237 ISBN-13(EAN): 9789061912231 Издательство: Taylor&Francis Рейтинг: Цена: 15125 р. Наличие на складе: Невозможна поставка.
The importance of glacial deposits is continually increasing, not only for pure scientists, but also for applied geologists. In many parts of Europe, as well as North America, these deposits provide major sand and gravel reserves, groundwater reservoirs and the foundation on which houses, roads and bridges are built. They are thus fundamental to many environmental and engineering problems. In this volume forty six authors report on the current state of specialist research on various aspects of glacial deposits. The geographical coverage of their work -- Norway, Sweden, Denmark, West Germany and the Netherlands -- represents a transect from the centres of the major North European Quaternary glaciations to their margins. Among the topics covered are: drift prospecting, modern varve chronology, fine gravel analysis, internal structure of thrust moraines, stratigraphical interpretation of well-logs, echo-sounding of North Sea deposits, erratic pebbles as indicators, till fabrics, palaeontology of glacial deposits, multi-component analyses, glacial deposition on the continental shelf and the genetic interpretation of glacial landforms. In addition there are reviews of the regional stratigraphy and glacial chronology of each of the five countries represented and detailed discussion of the problems of genesis, reworking, transport and deposition of Quaternary glacial sediments. Much information is previously unpublished.
The volume is intended to serve both as a text book for students and informed amateurs and as a guide for professional geoscientists. The 53 chapters are richly illustrated (409 black and white illustrations and 95 colour photos). In addition to a full and detailed index, the book contains one of the most up-to-date and complete lists of the most important literature on Quaternary problems in North-West Europe, with over 700 references, which serve as a guide for further studies.
Автор: V.I. Osipov (Editor) Название: Clay Seals of Oil and Gas Deposits ISBN: 9058095835 ISBN-13(EAN): 9789058095831 Издательство: Taylor&Francis Рейтинг: Цена: 24750 р. Наличие на складе: Невозможна поставка.
Описание: The processes of structure formation as well as the development of physical, seepage and mechanical properties of clay sediments in the course of lithogenesis are scrutinized on the bases of facial analysis.
Автор: Haldar, S. K. Название: Platinum-Nickel-Chromium Deposits ISBN: 0128020415 ISBN-13(EAN): 9780128020418 Издательство: Elsevier Science Рейтинг: Цена: 12128 р. Наличие на складе: Поставка под заказ.
Описание: Platinum-Nickel-Chromium Deposits: Geology, Exploration, and Reserve Base is the first reference book to combine information on the discovery of numerous minerals within existing deposits. This book recognizes the close affinity and great natural coexistence of platinum, palladium, chromium, nickel, copper, gold, and silver hosted by unique stratigraphy (mafic-ultramafic intrusive of layered ingenious complex) in a diverse structural set up. The chapters are organized in a logical sequence of introductory physical and chemical properties, demand-supply scenario, price trend, substitution-recycling and uses of these metals, stratigraphy and host rocks, geochemistry, global distribution of existing deposits in six mega continents, genetic system, reserves-resources overview, common characteristic features aiding as exploration guides for new targets, hazards, and sustainable development. This reference book is a must for students, research scholars, teachers, and professional explorers in economic geology, geography, and allied subjects.
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