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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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| Kirovsk, Kola Peninsula, Russia. (2) Motzfeldt centre, Greenland; by electron microprobe. (3) Na2 Fe5...augite, riebeckite, arfvedsonite, hedenbergite, fayalite, ilmenite. Distribution: Notable studied occurrences...intrusion; from Narss^arssuk; and elsewhere in Greenland. In the Khibiny and Lovozero massifs, Kola Peninsula...volcano, Nandewar volcano, and the Mt. Warning complex, New South Wales; and the Peak Range Province,...from the nepheline syenites of the Motzfeldt centre, South Greenland. Mineral. Mag., 48, 1{12. All rights |
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| Evolution of the North Qo“roq centre nepheline syenites, South Greenland: alkali-mafic silicates and the...Saskatchewan, Canada, S4S 0A2 ABSTR ACT The North Qôroq centre comprises a series of concentric nepheline syenite...Nepheline Syenite Complex, in the rift-related Gardar Province of South Greenland. The North Qôroq syenites...variation both within units and throughout the centre. Many of the rocks have been affected by metasomatic...metasomatism, Gardar Province, Greenland. Introduction THE North Qôroq centre comprises a series of concentric |
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| BURKE, E. A. J., see ANDERSEN, T., 145 Bushveld complex, see South Africa BUTCHER, A. R., see EALES, H...413 Carbonatite, at the Kruidfontein volcanic complex, Transvaal, South Africa, 46; complexes containing...L. B. and LE BAS, M. J., carbonatitic volcanic complex, Transvaal, 46 Cleavage, etch pits on basal cleavage...E., see MACLEOD,G., 637 Fayalite, from Rapakivi granites of South Greenland, 57 FERNANDEZ-DIAZ, L., see...minerals associated with alkaline magmatism from Greenland, 407 FINLAND, evolution of a metamorphic fluid |
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| composition of amphiboles may occur in a given complex. A subtrend found only In oversaturated complexes...variation of amphiboles from the Topsalls-St. Lawrence complex (Strong and Taylor, 1984) illustrated III (a) the...granites. Cauro-Bastelica complex Amphiboles in the hypersolvus and fayalite-bearing granites of the Cauro-Bastelica...Cauro-Bastelica complex, Corsica (Giret et aI., 1980) exhibit a very limited range of composition (Fig...and annite in mariolitic cavities. Mahe complex The Mahe complex, Seychelles (Hoshino, 1986) consists of |
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| minerals such as eudialyte and rinkite, that is complex silicates of Zr, Ti, the rare earth elements (REE)...200 in the type locality, the Ilfmaussaq complex, South Greenland. These rocks have very long melting intervals...developed, hyperagpaitic lujavrites of the Ilfmaussaq complex have been formed from melts with extreme concentrations...syenite, phonolite, eudialyte, rinkite, Ilfmaussaq complex. Introduction SOME of the characteristic minerals...200 years. They were collected in the Ilfmaussaq complex by K.L. Giesecke in 1806 and were subsequently |
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| U-Pb zircon age of the Strange Lake peralkaline complex: implications for Mesoproterozoic peralkaline magmatism...Geological Survey of Canada, Quebec Geoscience Centre, 2700 Rue Einstein, P.O. Box 7500, Sainte-Foy,...exotic-poor granite of the Strange Lake peralkaline complex contains zircons that are dated at 1240 + 2 Ma...granite is one of the oldest intrusions of this ring complex and one of only a few that contain primary zircon;...comparable age occur near the Strange Lake peralkaline complex (Association III) and the Red Wine Intrusive Suite |
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| in a differentiated alkaline complex: Kfingnfit Fjeld, South Greenland D. STEPHENSON Institute of Geological...3JW ABSTRACT. Kt~ngmit Fjeld is an intrusive complex resulting from three intrusive events involving...(annite3~ to annite98.5). KONGNAT FJELD, south Greenland, is a deeply dissected mountainous area composed...1971). While dominantly syenitic, the alkaline complex exhibits an essentially continuous spectrum of...beneath a cover estimated at 4-5 km thickness. The complex is the westernmost known in the Gardar alkaline |
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| DECEMBER 1985 The Tugtut6q older giant dyke complex: mineralogy and geochemistry of an alkali gabb... association in the Gardar Province of South Greenland B. G. J. UPTON Grant Institute of Geology, University...Edinburgh EH9 3JW ABSTRACT. The Older Giant Dyke Complex is a differentiated alkaline intrusion of Proterozoic...geochemistry, alkali gabbro, foyaite, Gardar, Greenland. 624 B. G. J. U P T O N E T A L . T HE alkaline...igneous rocks of the Gardar province in southern Greenland were erupted during the interval 1350-1120 Ma |
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| Hirak BHATTACHARIYA and Soumitra DASGUPTA National Centre of Experimental Mineralogy and Petrology, University...apparatus (Boyd & England 1960) at the National Centre of Experimental Mineralogy and Petrology. Talc–pyrex...calibrated → magnetite at 1000°C against the reactions fayalite ← → + quartz (1.41 GPa; Bohlen et al. 1980) and...voltage 15 kV, sample current 20 nA) at the National Centre of Experimental Mineralogy and Petrology, University...nepheline syenites from the Morro Redondo alkaline complex, Brazil, has been plotted in the nepheline – kalsilite |
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| substantially less than in pyroxenes from the Motzfeldt centre, south Greenland (Jones and Peckett, 1980), where aegirines...are clearly illustrated in fig. 5. A intrusion, Greenland (Larsen, 1976). In a com- ternary plot of N a...Barker, 1973) and the Ilimaussaq intrusion, south Greenland (Larsen, 1976). Additional substitutions of the...synthetic F M Q buffer curve. The presence of with a fayalite-magnetite-quartz (FMQ) assemilmenite microphenocrysts... 1969). However, in natural assemblages blage fayalite-titanomagnetite-quartz (the natural aegirine does |
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| and Petrology of the Red Hill Alkaline Igneous Complex, New Hampshire, U.S.A. by C. M. B. HENDERSON 1...Mineral assemblages crystallized close to the quartz-fayalite-magnetite buffer at a pressure of about 1-1-5...fluid-saturated conditions. It seems likely that the complex formed by emplacement of fractionated magmas derived...after the main complex was formed. INTRODUCTION This study of the Red Hill complex forms part of continuing...previous petrological work The Red Hill intrusive complex, New Hampshire (lat. 43°N; long. 71° 21'W) covers |
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| terms of magma source and evolution. The Etaneno complex occurs in close spatial proximity to the Kalkfeld...Kalkfeld bimodal carbonatite – alkali silicate complex, and is dominated by nepheline (ne)-monzosyenites and...Kalkfeld ring complex is a bimodal silicate – carbonatite intrusion. The nearby Etaneno complex consists of...(2000, in press) for magma generation. The Etaneno complex is an igneous plug some 2 km in diameter, but aeromagnetic...general, the less evolved rocks tend to occupy the centre of the intrusion, while more differentiated varieties |
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| Deboullie pluton well above the quartz-magnetite-fayalite buffer, which is also consistent with magmas associated...subhedral laths, some of which are phenocrysts. Complex oscillatory zoning is common in plagioclase. The...controlled by amphibole composition but in a more complex manner than for biotite. It was found that different...fugacities, typically above the quartz-magnetite-fayalite buffer. Another factor that influences the type...of reversely zoned plutons in the Bottle Lake Complex, Maine. U.S. Geol. Surv., Prof. Pap. 1320.58 pp |
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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...indicate that relatively high 102, at or above the fayalite-magnetite-quartz buffer, prevailed throughout...The Magnet Cove complex is a IOI-Ma (Zartman, 1977; Eby, 1987) alkaline ring-dike complex that crops out |
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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 |
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| layered syenites from the Klokken intrusion, South Greenland. We present new hyperspectral CL, SEM images,...planes with low surface energies. Others have complex, diffuse boundaries that indicate a phase of coherent...intrusion, in the Gardar alkaline province of South Greenland, is a remarkable natural laboratory for the study...the Klokken intrusion. Figures for scale at left centre. Dark brown, irregularly spaced and sometimes discontinuous...Braid (right and top left) and patch perthite (left centre) viewed from approximately parallel to b. In this |
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| 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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| org/details/geologyofgreenla0000unse Geology of Greenland ™~ i ~ j : . . — ; i ~ - : Arthur Escher...Geological Survey of Greenland 1976 Copyright © The Geological Survey of Greenland, Available from...from The Geological Survey of Greenland @Mster Voldgade 10 DK-1350 Copenhagen Denmark or through your bookseller...ae A/S, Odense 1976 Preface Geology of Greenland aims to provide a concise modern account of...geology. A large part of the exposed bedrock in Greenland is formed of Precambrian crystalline rocks with |
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| org/details/geologyofgreenla0000unse Geology of Greenland = ~ Geology of sreenland Arthur Escher ...Geological Survey of Greenland 1976 Copyright © The Geological Survey of Greenland, Available The from...DK-1350 Denmark or through ISBN 1976 Survey of Greenland 10 Copenhagen your bookseller 87-980404—0-5S... Fabrik A/S, Odense Preface Geology of Greenland aims to provide a concise modern account...geology. A large part of the exposed bedrock in Greenland is formed of Precambrian crystalline rocks with |
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| Society Publishing House Unit 7, Brassmill Enterprise Centre Brassmill Lane Bath BA1 3JN UK (Orders: Tel. 01225...hematite—magnetite nickel—nickel oxide quartz—fayalite-magnetite wistite—magnetite Units of pressure...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 |
 | | 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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| whom I have explored and experienced the Bushveld Complex, and the many associates elsewhere who have shown...River in the Upper Critical Zone of the Bushveld Complex. Chromitite layers in anorthosite frequently bifurcate...conversion of primary to derivative magmas. Thus a complex series of "integration stages" coupled with "differentiation...that are over-ruled by the likelihood of more complex processes operating at crystal boundaries and between...the interface between crystal-free magma in the centre of a magma chamber and solidified rock at the margin |
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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 |
