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Author: Henning Sørensen
Publisher:
ISBN:
Category : Alkalic igneous rocks
Languages : en
Pages : 178
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Book Description
Author: Henning Sørensen
Publisher:
ISBN:
Category : Alkalic igneous rocks
Languages : en
Pages : 178
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Book Description
Author: Henning Sorensen
Publisher: Museum Tusculanum Press
ISBN: 9788763512718
Category : Science
Languages : en
Pages : 74
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Book Description
The Ilimaussaq alkaline complex, South Greenland, the type locality of agpaitic nepheline syenites and of thirty minerals, among which arfvedsonite, eudialyte and sodalite, has been studied since 1806. The paper reviews the outcome of 200 years of geological investigations and presents an overview and a synthesis of the petrology of the complex. According to one model for the evolution of the complex, the nepheline syenites formed by consolidation of one magma batch in a closed system. The lujavrites were formed from the residual melts left after the formation of the roof series and the floor series and were sandwiched between these. A second model implies that the kakortokites and lujavrites formed from one or more separate magma pulses which intruded the already consolidated roof series rocks. This model is supported by new information on contact relations and especially on the petrology and geochemistry of a marginal pegmatitic fades that forms a rim around the kakortokite-lower aegirine lujavrite part of the complex. It consists of a massive-textured matrix intersected by pegmatites. The matrix was the first rock to form in the lowermost exposed part of the complex and gives information about the composition of the initial magma of the kakortokite-lujavrite sequence. It is concluded that the agpaitic rocks of the complex were formed from at least two successive magma injections, which formed respectively the roof series and the kakortokite-lujavrite sequence.
Author:
Publisher: Museum Tusculanum Press
ISBN: 9788763512589
Category :
Languages : en
Pages : 68
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Author:
Publisher:
ISBN:
Category : Beryllium ores
Languages : en
Pages : 440
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Author: Bernard Charlier
Publisher: Springer
ISBN: 9401796521
Category : Science
Languages : en
Pages : 749
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Book Description
This edited work contains the most recent advances related to the study of layered intrusions and cumulate rocks formation. The first part of this book presents reviews and new views of processes producing the textural, mineralogical and geochemical characteristics of layered igneous rocks. The second part summarizes progress in the study of selected layered intrusions and their ore deposits from different parts of the world including Canada, Southwest China, Greenland and South Africa. Thirty experts have contributed to this update on recent research on Layered Intrusions. This highly informative book will provide insight for researchers with an interest in geology, igneous petrology, geochemistry and mineral resources.
Author: Ismar Borges De Lima
Publisher: Elsevier
ISBN: 0128025689
Category : Science
Languages : en
Pages : 468
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Book Description
Rare Earths elements are composed of 15 chemical elements in the periodic table. Scandium and yttrium have similar properties, with mineral assemblages, and are therefore referred alike in the literature. Although abundant in the planet surface, the Rare Earths are not found in concentrated forms, thus making them economically valued as they are so challenging to obtain. Rare Earths Industry: Technological, Economic and Environmental Implications provides an interdisciplinary orientation to the topic of Rare Earths with a focus on technical, scientific, academic, economic, and environmental issues. Part I of book deals with the Rare Earths Reserves and Mining, Part II focuses on Rare Earths Processes and High-Tech Product Development, and Part III deals with Rare Earths Recycling Opportunities and Challenges. The chapters provide updated information and priceless analysis of the theme, and they seek to present the latest techniques, approaches, processes and technologies that can reduce the costs of compliance with environmental concerns in a way it is possible to anticipate and mitigate emerging problems. - Discusses the influence of policy on Rare Earth Elements to help raise interest in developing strategies for management resource development and exploitation - Global contributions will address solutions in countries that are high RE producers, including China, Brazil, Australia, and South China - End of chapter critical summaries outline the technological, economic and environmental implications of rare earths reserves, exploration and market - Provides a concise, but meaningful, geopolitical analysis of the current worldwide scenario and importance of rare earths exploration for governments, corporate groups, and local stakeholders
Author:
Publisher: Newnes
ISBN: 0080983006
Category : Science
Languages : en
Pages : 14787
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Book Description
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)!
Author: Simon M. Jowitt
Publisher: MDPI
ISBN: 3038970174
Category : Science
Languages : en
Pages : 173
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Book Description
This book is a printed edition of the Special Issue "Criticality of the Rare Earth Elements: Current and Future Sources and Recycling" that was published in Resources
Author: Mark Nuttall
Publisher: Taylor & Francis
ISBN: 1351400282
Category : Science
Languages : en
Pages : 401
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Book Description
Once imagined as a place on the very edge of the world, Greenland is now viewed as being at the epicentre of climate change. At the same time, international attention is focused on opportunities for oil and mineral development, seemingly made possible as the inland ice melts and sea ice disappears, revealing geological riches and making access to remote areas easier. In this book, Mark Nuttall takes the reader on a journey through landscapes, seascapes and icescapes of memory, movement and anticipation. Unravelling the entanglements of climate change, indigenous sovereignty and the politics surrounding non-renewable resource extraction, he describes how the country is on the verge of major environmental, political and social transformations as it aspires to greater autonomy and possible independence from Denmark. At the heart of this is discussion about how resources and the environment are given meaning and how they have become subject to intense political and ideological struggle. Climate, Society and Subsurface Politics in Greenland: Under the Great Ice is a key resource for academics, practitioners and students of anthropology, geography, development studies, political ecology and polar studies.
Author: Alan Robert Woolley
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 232
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Book Description
