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mineralsof nephelinesyenitesfrom the Motzfeldt Centre,South Greenland A. P. JoNrsr Diuisionof Geologicaland...which constitutethe Proterozoic(- 1310ma) Motzfeldt Centre. Larvikite margins of one unit (SM5) are apparently...discussed. eral The Motzfeldt Centre is the older of four major centers The Motdeldt Centre is especiallyinterestingbecausea...Province of southern Greenland (Emeleus and (Ferguson,1964, Upton, 1976).The Motzfeldt Centre has a determined...briefoutlineofthe geologyhasbeengivenby Jones(1984). The Motzfeldt Centre was formed by a seriesof overlapIn this paper |
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from the nepheline syenites of the Motzfeldt centre, South Greenland A. P. JONES* The University of Chicago...Mineralogically the Motzfeldt centre is evolved and similar to the other centres in the Igaliko complex. However...However, the Motzfeldt centre contains the most fractionated rocks (lujavrites) and is in this respect similar...compositional ranges and trends of the mafic silicates in Motzfeldt thus provide links between the uncommon peralkaline...exposures throughout the Gardar province in southern Greenland (for general description see Upton, 1974; Emeleus |
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Syemtes from the Magnet Cove alkaline igneous complex form a diverse mmeralogical and geochemical suite...zonmg in pnmary and late-stage minerals mdicates complex, multi-stage crystalhzation and replacement hlstones...and H 20, reacted with primary minerals to form complex intergrowths of mmerals such as rinklte, fluorite...The Magnet Cove complex is a IOI-Ma (Zartman, 1977; Eby, 1987) alkaline ring-dike complex that crops out...and Nb mineralization are found both within the complex and in country rock adjacent to it (e.g., Erickson |
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Manitoba R3T 2N2 Canada Prof. Dr. FRANCIS SAUPE Centre de Recherehes Petrographiques et Geochimiques B...Group Minerals from the Qaqarssuk Carbonatite Complex. C. Knudsen ( with 8 Figures) . . . . . . . . ...square-based antiprism (Fig. 1c) in nordite, a complex silicate where only traces of Ca substitute for...responsible for the pink colour through the (Y0 2 ) centre, consisting of an 0 2 3 - molecular ion stabilized...cerium group, in calcites from the Oka carbonatite complex. 6.3 Oxides In 39 of their oxides/hydroxides, |
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Alkaline Magmatism: Constraints from the Spitskop Complex, South Africa R. E. HARMER∗ COUNCIL FOR GEOSCIENCE...deeper-sourced carbonatite melts. The 1341 Ma old Spitskop Complex in South Africa is one of a series of intrusions...this association is not defined. The Spitskop Complex is one of a suite of alkaline intrusions, many...relationships between the magmatic components of the complex. These data will then be utilized to evaluate the...carbonate fractions. THE SPITSKOP COMPLEX General geology The Spitskop Complex is crudely circular in form |
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These later proved to be calcite, apophyllite, pectolite, and sodalite, respectively. Ultraviolet radiation...traces of uranium. The magenta- pink of the pectolite is a color seen rarely in the fluorescence of...presence of traces of the rare-earth elements. The pectolite fluorescence may be due to the same activators...orange-fluorescing sodalite. On the southwest coast of Greenland, near Julianehab, occurs a remarkable cluster...from 22 SURVEY AND OVERVIEW OF LOCALITIES Greenland. Yellow-fluorescing vuonnemite and orange-fluorescing |
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These later proved to be calcite, apophyllite, pectolite, and sodalite, respectively. Ultraviolet radiation...traces of uranium. The magenta- pink of the pectolite is a color seen rarely in the fluorescence of...presence of traces of the rare-earth elements. The pectolite fluorescence may be due to the same activators...orange-fluorescing sodalite. On the southwest coast of Greenland, near Julianehab, occurs a remarkable cluster... 22 SURVEY AND OVERVIEW OF LOCALITIES Greenland. Yellow-fluorescing vuonnemite and orange-fluorescing |
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.......................................... 5 Greenland ........... ....................................Lengai natrocarbonatite volcano and the Ilimaussaq complex, but comparative studies on alkaline rocks have...parts: 1 North and South America (including Greenland) 2 Africa 3 U.S.S.R. 4 Asia and Europe (excluding...quoted to the nearest minute for the approxi mate centre of the occurrence. For a remarkably large number...other hand many occurrences are so extensive and complex that the descriptions will only be adequate to |
| | Report (volume) |
Mid-Proterozoic alkaline magmatism in southern Greenland: the Gardar province 449 LARSEN, L. M. & SORENSEN...T. F. D. Tertiary alkaline magmatism in East Greenland: a review 489 DOWNES, H. Tertiary and Quaternary...alkaline provinces, such as East Africa, southern Greenland and the Kola Peninsula, are included together...(1983) for the Tupertalik carbonatite in western Greenland. At the present time, alkaline magmas are erupted...The Proterozoic Gardar province in SouthWest Greenland is probably the best studied of these and is reviewed |
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Society Publishing House Unit 7, Brassmill Enterprise Centre Brassmill Lane Bath BA1 3JN UK (Orders: Tel. 01225...the relative stabilities of minerals in quite complex chemical systems. In geochronology, the K—Ar and...the present volume. Amphiboles are notoriously complex chemically and their nomenclature was the subject...octahedral bands). The octahedral strip at the centre of an amphibole’s structural I-beam can occur in...gedrites, the Méssbauer and infrared spectra are very complex. The various investigations, including those by |
| | Conference Proceedings (Volume) |
Paleoproterozoic U-mineralization in the Archean Pudasjärvi Complex, northern Fennoscandian Shield ..................Beaufort Kvanefjeld – a large uranium deposit in Greenland ...............................................& W. Dawes Rare earth elements in Europe and Greenland: a geological potential? An overview Nicolas...characteristics of the Yonghwa phoscorite-carbonatite complex, Korea . . ......................................mineralization is related to gabbro-dioritetonalite complex. Ore bodies are conformable to contacts of the |
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due to Mr. Shyam Sunder Pandey of the National Centre of Mineralogy and Petrology (Allahabad University)...Lamproitic Rocks from Greenland. . . . . . . . . . . . . . . . . . 4.9.1 Batbjerg Complex . . . . . . . . ... . . . . . 4.9.2 Holtsteinberg Lamproit from Greenland . . . . . . . 4.9.3 Kap Dalton (69°24′N, 24°10′W)...48°22′E) . . . . . . . . . . . . . . 4.12.5 Ishimskii Complex (51°17′N, 66°33′E) . . . . . . . . 4.12.6 Daubabinskoe... . . . . . . . . . . . . . 4.12.18 Dezhnevski Complex (66°05′N, 169°47′W) . . . 4.12.19 Andriyanovka |