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2 edition of Literature abstracts pertaining to nepheline syenites. found in the catalog.

Literature abstracts pertaining to nepheline syenites.

Charles Jacob Koenig

Literature abstracts pertaining to nepheline syenites.

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  • 11 Currently reading

Published by College of Engineering, the Ohio State University in Columbus .
Written in English

    Subjects:
  • Syenite -- Bibliography.,
  • Nepheline syenite.

  • Edition Notes

    GenreBibliography.
    SeriesOhio State University, Columbus. Engineering Experiment Station. Bulletin, no. 130, Ohio State University studies. Engineering series,, v. 16, no. 4
    Classifications
    LC ClassificationsTP815 .K567
    The Physical Object
    Pagination33 p.
    Number of Pages33
    ID Numbers
    Open LibraryOL190952M
    LC Control Numbera 47000043
    OCLC/WorldCa6128526

    Pseudoleucite syenite is a magmatic rock, which is rarely found in the foidolite rock group. With respect to the compositions of similar alkali feldspars as sodium potassium aluminosilicates, feldspathoid minerals are normally characterized by silica deficiency. Pseudoleucite syenite formed from alkaline (sodium and potassium)-rich and silica-poor : Zeynel Başibüyük, Gökhan Ekincioğlu. NaCa amphiboles are found as up to 5mm large grains and crystalline masses in both types of syenites. In the silica saturated syenites, the amphobole is (ferro)richterite, whereas katophorite with rims of ferrorichterite is found in the silica undersaturated syenites. Literature F. Rudolfi, A Renzulli, P. Santi. The Nechalacho rare metal deposit, and in particular its heavy rare earth element (HREE)-enriched Basal zone, constitute a world-class resource of REEs, zirconium, and niobium. ThCited by: 4.


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Literature abstracts pertaining to nepheline syenites. by Charles Jacob Koenig Download PDF EPUB FB2

Get this from a library. Literature abstracts pertaining to nepheline syenites. [C J Koenig]. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider Literature abstracts pertaining to nepheline syenites.

book to handle coronavirus. Test specimens of twelve bodies, comprising various flux combinations of nepheline syenites and potash feldspars with talc, whiting, magnesium carbonate, and pyrophyllite, were fired to seven different cones. The firing linear shrinkage curves of combinations of nepheline syenite with the.

various materials are somewhat similar to such combinations with potash feldspar except that the syenite Cited by: 8. Isotopic and chemical evidence for an igneous premetamorphic history include: (1) bulk compositions which plot in the Q–Ne–Ks system on a peralkaline fractionation curve; (2) bulk compositions which fall on the Hviddal igneous trend in the SiO 2 –Al 2 O 3 –Na 2 O + K 2 O molecular diagram; (3) an average Literature abstracts pertaining to nepheline syenites.

book ratio identical to the average for nepheline syenites of the Khibina massif; (4) K/Rb ratios which Cited by: 8. The nepheline syenites are characterized by assemblages with alkali feldspar, nepheline, Fe-Ti oxides, clinopyroxene, amphibole, apatite and titanite, while the peralkaline nepheline syenites have Author: Alan Woolley.

Geochemically, nepheline syenites show high-K content relative to Th and U (Tye et al., ). On ternary plots, the potential nepheline syenites and related rocks were those which showed high potassium content. The ideal areas for fieldwork, were therefore, those with high K, relative to U and : Annock Gabriel Chiwona, Joaquín A.

Cortés, Joaquín A. Cortés, Rachel G. Gaulton, David A.C. Manning. syenite) and other nepheline syenite bodies, such as the Bjønnes nepheline syenite pluton towards the western margin of the complex. It is thought to relate to a series of nepheline syenite dykes in the larvikites of the surrounding areas, which in turn are thought to be associated with mildly agpaitic nepheline syenite pegmatites (Dahlgren, Nepheline syenites are silica-undersaturated and some are peralkaline (terms discussed in igneous rock).

Nepheline is a feldspathoid, a solid-solution mineral, that does not coexist with quartz ; rather, nepheline would react with quartz to produce alkali y: alkali feldspar, nepheline. Electron microprobe analyses of olivines from augite syenites and foyaites of the South Qôroq Centre, Igaliko Complex, show a range from hortonolite (Fo 36 Fa 62 Te 2) to manganiferous fayalite (Fo 2 Fa 82 Te 16).The trend is continuous except for a gap between compositions from augite syenite mafic bands and normal augite by: The complex extends for over km and comprises monzonites, syenites, nepheline syenites, nepheline-bearing syenites, trachytes and phonolites.

It differs from other alkaline rocks of the craton. The potential of nepheline syenite as an alternative potash source for Malawi Annock Chiwona1, 2*, Joaquin Cortes Carrillo 1, Rachel Gaulton 1 and David Manning 1 School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, UK 2 Geological Survey of Malawi * Presenting and corresponding author: [email protected] Size: KB.

The North Qoroq nepheline syenites form part of the rift-related Gardar Province of south Greenland. In situ fractionation of the syenitic magmas resulted in a peralkaline residual magma of lujavritic composition, with concentration of rare-earth elements (REE), Y, Zr and by: Nepheline (Na;K)AlSiO4 °c Mineral Data Publishing, version Crystal Data: Hexagonal.

Point Group: 6: As stout six- or twelve-sided prisms, terminated File Size: 72KB. Abstract Mt. Hilaire occurs as a small funnel‐shaped intrusion in the Monteregian petrographic province of Quebec and consists of alkali gabbros and later nepheline syenites.

Based on field relations, petrography, and geochemistry, five types of gabbro are by: 9. Mountain and Nephton nepheline syenite deposits in Ontario. These deposits are within a Precambrian nepheline intrusion about 9 km long and up to km wide.

Nepheline syenite in Norway comes from Stjernøy Island, km north of the Arctic Circle, where the File Size: KB. Alternative Titles: eleolite, nephelite. Nepheline, also called nephelite, or eleolite, the most common feldspathoid mineral, an aluminosilicate of sodium and potassium [ (Na,K)AlSiO 4 ].

It is sometimes used as a substitute for feldspars in the manufacture of glass and ceramics. Nepheline is the characteristic mineral of alkaline plutonic rocks, particularly nepheline syenites and nepheline gneisses. The recent literature on the kinetics of water‐rock interactions is reviewed.

The data are then extended to provide a quantitative framework for the description of weathering and alteration. The available experimental data on dissolution of silicates verifies quantitatively the usual mineral stability series in sedimentary by: Alkaline rocks and carbonatites, including nepheline syenites, are well established as mantle-derived magmatic products, but the nature and location of their mantle sources is debated.

Some workers have used isotopic compositions to infer mixed mantle plume type sources such as EM1, HIMU, and FOZO, implying derivation from the subcontinental Cited by: 5.

His research combines geophysical gamma ray and remote sensing data to identify nepheline syenites in Malawi’s East African rift system section. He argues that nepheline-bearing rocks could be suitable as an alternative K silicate fertilizer because of the highest dissolution rate of Size: 4MB.

All syenites from the Grønnedal-Ika complex are nepheline-bearing (Emeleus, ), and nepheline usually occurs as euhedral prisms (Fig. 2a–c). Nepheline is chemically unzoned and its composition is fairly homogeneous within individual samples and also within the whole sample suite, including the PMS and the XPS (Table 2).Cited by: The chief minerals in syenite are the feldspars, with mica, hornblende, and pyroxene.

Varieties are distinguished (according to the ferromagnesian minerals contained) as augite syenite, hornblende syenite, mica syenite, and nepheline syenite. Syenites are comparatively rare rocks, being found chiefly in a few areas of the United States and Germany.

The granitoids that form the backbone of the Eastern Cordillera of Peru between 12 and 14°S, are the ideal material for a case study to relate geodynamic setting to crustal growth over the period of a Wilson cycle.

Extension related plutons were emplaced in the back-arc region of the Western Gondwana margin during the Ordovician, Permo-Carboniferous, Triassic and Early : M. Reitsma, U. Schaltegger, R. Spikings, A. Ulianov, A. Gerdes, M. Chiaradia. Abstract.

The Ma old Spitskop Complex in South Africa is one of a series of intrusions of alkaline affinity, which were emplaced into the central Kaapvaal Craton over the time period – Ga. Spitskop contains calcite and dolomite carbonatite closely associated with pyroxenite, ijolite and nepheline syenite, and provides an ideal opportunity to study the petrogenetic relationships Cited by: This study focuses its attention on the ‘Eudialiye complex’ in one of the most important alkaline intrusion, characterised mainly by nepheline syenites and other kind.

Nepheline Syenite. Nepheline syenite is a white to light grey medium-grained igneous rock. It consists mostly of soda feldspar, nepheline and potash feldspar, accessory magnesium and iron-rich minerals.

The Canadian nepheline syenite industry began in when claims were staked on Blue Mountain near Peterborough, Ontario, where it is still. As a major text in igneous petrology, this innovative book offers a much-needed, radically different approach to the study of igneous rocks.

Bridging a long-recognized gap in the literature by providing petrogenic models for magmatismin terms of global tectonic processes, it encompasses geophysics and geochemistry in a comprehensive treatment of the textbooks in igneous.

The Saima deposit is a newly discovered niobium deposit which is located in the eastern of Liaoning Province, NE China. Its mineralization age and geochemical characteristics are firstly reported in this study.

The Nb orebodies are hosted by the grey–brown to grass-green aegirine nepheline syenite. Detailed petrographical studies show that the syenite consists of orthoclase (~50%), nepheline Cited by: 2. Nepheline syenites are silica-undersaturated and some are peralkaline (terms discussed in igneous rock).Nepheline is a feldspathoid, a solid-solution mineral, that does not coexist with quartz; rather, nepheline would react with quartz to produce alkali feldspar.

They are distinguished from ordinary basic syenites not only by the presence of nepheline but also by the occurrence of many other. Loparite is structurally similar to perovskite and exhibits no cleavage.

It is black, opaque, and has a semimetallic luster. Its hardness isand its density 4, kg/m 3. Loparite occurs in nepheline syenites (sometimes as one of the rock-forming magmatic minerals) and, more rarely, in pegmatites genetically related to nepheline.

Abstract Trace element compositions of clinopyroxene and amphibole from three rift-related alkaline to peralkaline igneous complexes (syenites and granites) in South Greenland reflect evolving magma composition as well as crystal-chemical control on partitioning.

The British Columbia Geological Survey's report on Carbonatites, Nepheline Syenites, Kimberlites and Related Rocks in British Columbia by Jennifer Pell.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. literature on the mineralogy and metamorphism of these rocks. Rajasekaran (a) described albite-epidote hornfels facies in contact with nepheline syenite and a metasomatized variety (a fenite) containing arfvedsonite, narsarsukite and neptunite (Rajasekaran b).

Currie () reported comparatively low grades of hornfels. Abstract. The isotope Sm The nepheline syenites and syenites are coarse-grained rocks consisting mostly of perthite, nepheline, and. As a major text in igneous petrology, this innovative book offers a much-needed, radically different approach to the study of igneous rocks.

Bridging a long-recognized gap in the literature by providing petrogenic models for magmatismin terms of global tectonic processes, it encompasses geophysics and geochemistry in a comprehensive treatment of the subject. Syenites are generally formed in areas where the Earth's crustis the thickest.

To produce syenite, you must melt a granitic origneous rock so that only a portion of the rock has melted. Silica. @article{osti_, title = {THORIUM, URANIUM AND ZIRCONIUM CONCENTRATIONS IN BAUXITE}, author = {Adams, J A.S.

and Richardson, K A}, abstractNote = {Twenty-nine samples of bauxites from different locations were analyzed for thorium and uranium by gamma spectrometric, alpha counting, and wet chemical methods. The thorium concentrations ranged from to ppm and. Extremely iron-rich olivine is rare, but is present in some nepheline syenite.

Other minerals common in minor amounts include sodium-rich pyroxene, biotite, titanite, zircon, iron oxides, apatite. Volcanic-plutonic alkaline complexes from Lugiin Gol, Mushgai Khudag and Bayan Khoshuu, southern Mongolia (, and Ma, respectively) occur within grabens in E-W lineaments.

They are represented by syenitic rock-types (silica undersaturated to slightly silica oversaturated) potassic rocks and are associated to stockworks of carbonatitic veins, dykes and so by: Abstract. Geologic and geochemical criteria were developed for the occurrence of economic uranium deposits in alkaline igneous rocks.

A literature search, a limited chemical analytical program, and visits to three prominent alkaline-rock localities (Ilimaussaq, Greenland; Pocos de Caldas, Brazil; and Powderhorn, Colorado) were made to establish criteria to determine if a site had some uranium. syenite (sī′ə-nīt′) n.

An igneous rock composed primarily of alkali feldspar together with other minerals, such as hornblende. [Latin Syēnītēs (lapis), (stone) of Syene, from Syēnē, Syene, an ancient city of southern Egypt, from Greek Suēnē.] sy′enit′ic (-nĭt′ĭk) adj.

nepheline definition: a hard, light-colored, hexagonal mineral, (Na,K)AlSiO, used in making glass, china, etc.; sodium potassium aluminum silicatesometimes called neph′elite Origin of nephelineFrench néphéline from Classical Greek nephel?.THE MINERALOGICAL COMPOSITION OF SOME NEPHELINE ALTERATION PRODUCTS A.

D. Encen, Department oJ Geol,ogy, Lrnitersity of Western Ontar'io, Lomdon, C anada. ABSTRACT Sixteen samples of variousiy labelled alteration products of nepheline, principally "hydronephelites" and "ranites," have been examined by r-ray difiraction methods.

TheFile Size: KB. Full Text; PDF ( K) PDF-Plus ( K) Citing articles; Isotopic evidence for a lithospheric origin of alkaline rocks and carbonatites: an example from southern Africa 1. Lewis D. Ashwal, a Madelein Patzelt, a b Mark D. Schmitz, c Kevin Burke d e f a School of Geosciences, University of the Witwatersrand, JohannesburgSouth Africa.

b Harz-Metall GmbH, Cited by: 5.