Author: Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages : 396
Book Description
The Geochemistry of the Lovozero Alkaline Massif: Geochemistry
Author: Geochemistry of Niobium and Tantalum
Author: Raymond Laurence ParkerPublisher:
ISBN:
Category : Niobium
Languages : en
Pages : 62
Book Description
Additional title page description: A review of the geochemistry of niobium and tantalum and a glossary of niobium and tantalum minerals.
U.S. Geological Survey Professional Paper
Author: Geological Survey Professional Paper
Author: Geological Survey Professional Paper
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
Ilímaussaq Alkaline Complex, South Greenland
Author: Henning SorensenPublisher: Museum Tusculanum Press
ISBN: 9788763512718
Category : Science
Languages : en
Pages : 74
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.
Phoscorites and Carbonatites from Mantle to Mine: the Key Example of the Kola Alkaline Province
Author: F. WallPublisher: The Mineralogical Society of Great Britain and Ireland
ISBN: 0903056224
Category : Science
Languages : en
Pages : 514
Book Description
Phoscorites are dark, often very handsome, sometimes economically valuable, magnetite-apatite-silicate rocks, almost always associated with carbonatite. They are key to understanding the longstanding question of how carbonate and carbonate-bearing magmas rise to the crust and the Earths surface. Despite this, they have been given little attention; a search on geological literature databases will produce thousands of references to carbonatite (up to 4125 on Georef) but not more than thirty references to phoscorite. This book goes some way to redress this balance. Over recent years many European and North American scientists have studied Kola rocks in collaboration with Russian colleagues. The idea for this book came from one such project funded by the European organisation, INTAS (Grant No 97-0722). The Kola Peninsula is one of the outstanding areas in the World for the concentration and economic importance of alkaline rocks. However, Russian work on the Kola complexes is still relatively unknown and a particular aim of this book, as well as presenting current research, is to make this knowledge accessible to English language readers. A large exploration programme on Kola alkaline rocks was active from 1950 to 1990 and involved teams of geologists who studied many kilometres of drill core and carried out detailed mineralogical and petrological studies.
Geochemistry International
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 454
Book Description
Vols. for 1964-v. 2, no. 1, 1965 include selected articles translated from geochemical papers from other languages, but primarily from Russian, German, French and Japanese.
Origin of Igneous Rocks
Author: Gunter FaurePublisher: Springer Science & Business Media
ISBN: 9783540677727
Category : Nature
Languages : en
Pages : 524
Book Description
The origin of different kinds of igneous rocks can be understood in terms of their tectonic setting, and by way of the isotope compositions of strontium, neodymium, and lead. This book explains the petrogenesis of igneous rocks as a consequence of tectonic processes resulting from interactions between asthenopheric plumes and the overlying lithospheric mantle. The relevant principles of isotope geochemistry are explained in the first chapter, making it accessible for university students as well as professionals. The relevant isotopic data is presented in diagrammatic form. The book contains more than 400 original drawings.
Geochemical Atlas of Eastern Barents Region
Author: R. SalminenPublisher: Gulf Professional Publishing
ISBN: 9780444518156
Category : Science
Languages : en
Pages : 568
Book Description
From 1999 to 2003 a multipurpose regional geochemical mapping project, was carried out in Finland, and the NW-part of Russia. An important aim of the project is to define the anthropogenic impact in relation to the natural variations in regional geochemical baselines of heavy metals and other elements over a large area containing several of the largest industrial emitters in Europe but also some of its most pristine areas. Terrestrial moss, the organic layer, stream waters, and the C-horizon soil samples were collected from1085 sites in Russia and 288 sites in Finland, giving an average density of one site per 1000 km2. Both total and aqua regia extractable element concentrations were determined from 2 mm fraction of minerogenic samples, and total concentrations of organic soil samples and terrestrial moss were measured after strong acid leach, bioavailable concentrations of organic layer soil samples were measured, too. Concentrations of more than 50 elements, radionuclides, and other parameters were determined. Different extraction methods were used in order to study the speciation and bioavailability of the elements./pbrbrpMaps showing the distribution of 48 elements and other parameters are included in this atlas. The anomaly patterns of minerogenic C-horizon data are strongly controlled by element distributions in the bedrock. Stream water data are mainly controlled by geological formations and structures both for major and trace elements, but in some cases the influence of anthropogenic activities could be detected as elevated heavy metal concentrations. Anomaly patterns from moss data reflect mainly anthropogenic activities, but in areas such as mountains and tundra the geogenic dust also has a strong influence. It was not possible to detect any long distance airborne transport of heavy metals from industrialized areas to clean arctic regions.