 | | Journal (article/letter/editorial) | | Indian Subcontinent carbonatites occur in India, Pakistan, Afghanistan and Sri Lanka; but so far not known...Myanmar. This paper takes an overview of the carbonatite occurrences in the Indian Subcontinent in the...Dongar), Pakistan (Permian Koga and Tertiary Pehsawar Plain Alkaline Complex which includes Loe Shilman, Sillai...Gruyter. Attribution 4.0 License Keywords: Carbonatite, Sevathur, Newania, Sung Valley, Amba Dongar...Plain, Khanneshin, Eppawala 1 Introduction Carbonatite melts are known to form by very low degrees of |  | | Journal (article/letter/editorial) | | which have only 5–10 wt% K2O. Keywords: fenite, carbonatite, sodic metasomatism, potassic metasomatism, K-feldspar...(Traduit par la Rédaction) Mots-clés: fénite, carbonatite, métasomatose sodique, métasomatose potassique...understood to be “alkali silicate and associated carbonatite igneous activity”. Although a side issue from...descent relationship between silicate magma and carbonatite magma”, and therefore the word § E-mail address:...within 20 km of each other; each has coexisting carbonatite and nephelinite. In this contribution, I consider |  | | Journal (article/letter/editorial) | | cr The petrogenetic relationships among three carbonatite units in the Potash Sulphur Springs alkaline...(1969, p.359) concludedthat micas i" t"h"'iil; carbonatite "represent rhe entire crystallization ;;;d; of... HEATHCOTE AND McCORMICK: PHLOGOPITE AND EVOLUTION OF CARBONATITE IJJ liths found in the Potash Sulphur Springs...ijolite, malignite, nephelinite, phonolite, and carbonatite. Numerous lamprophyre dikes are also present...HEATHCOTE AND McCORMICK: PHLOGOPITE AND EVOLUTION OF CARBONATITE TABLE2. Chemical composition of clinopyroxene |  | | Report (chapter) | | incompatible-element content. Further fractionation of carbonatite magma can produce mineralizing fluids rich in...rare-earth elements, F, Ba, U and Th. Dolomite carbonatite forms only in the deeper parts of carbonatitic...perhaps at depths greater than 2 km. Explosive carbonatite volcanism can occur giving widespread carbonate...with lavas. Fenitization characterizes ijolite-carbonatite intrusive complexes. Syenitic fenites containing...the Aln6 complex. He maintained that alkali carbonatite magma was the prime intrusive material at Aln6 |  | | Journal (article/letter/editorial) | | fayalite in T1 and of pure aegirine in T2 and the occurrence of Zr-bearing aegirine (NaZr0.5Fe2+ 0.5Si 2O6)...crystallizing alkaline syenites evolving towards pure aegirine from medium- to fine-grained quartz syenites and...degassing, favoured crystallization of Zr-bearing aegirine; a decrease in amphibole proportions towards medium-grained...Fe-rich (XFe = 96 100). They vary from aegirine-augite to aegirine and plot along the Hd-Ac joint of the...diagram (Fig. 3a). Small anhedral crystals of aegirine-augite (CaO = 11 16%, Na 2O = 3.5 6.6%) occur |  | | Journal (article/letter/editorial) | | Springer-Verlag1988 Fenitization at the Aln6 carbonatite complex, Sweden; distribution, mineralogy and...aergirine-augite and aergirine. Although trends from aergirine to aegirine-augite and aegirine-augite to diopside...aureole have been identified that converge on aegirine, and approximate trends in some series of alkaline...Von Eckermann's (1948) description of the Aln6 carbonatite complex has widely influenced later studies of...Eckermann's geological map, excluding the area of carbonatite centred on the skerries to the north and the |  | | Journal (article/letter/editorial) | | fugacity trends during crystallization of calcite carbonatite magma in the Fen complex, Norway TOM ANDERSEN...gate N-0562 Oslo 5, Norway Abstract Calcite carbonatite (scvite), associated apatite cumulates and contact...lines of magmatic descent gave rise to calcite carbonatite magma in the Fen complex. Combined apatite-phlogopite...much lower temperatures. KEYWORDS: calcite, carbonatite, scvite, fugacity, Fen complex, Norway. Introduction...liquidus phases of normal, nonperalkaline calcite carbonatite magma, and also Mineralogical Magazine, March |  | | Journal (article/letter/editorial) | | alkaline silicate igneous rocks, forming alkaline-carbonatite complexes, but some occur as isolated pipes,...indicator mineral surveys Carbonatites and alkaline-carbonatite complexes are the main sources of rare earth... Nine per cent of carbonatites and alkaline-carbonatite complexes contain active or historic mines, making...Introduction Mineralised carbonatites and alkaline-carbonatite complexes are highly sought after, multi-commodity...targets for mining companies worldwide. Alkaline-carbonatite complexes are significant sources of Cu, apatite |  | | Report (issue) | | Deposit/Site_Name, is meant to identify the area, deposit, district, mine, or occurrence to which the geologic, economic...duplicates, for some areas we report information for a district or area, as well as for specific deposits or mines...Phosphate, potash and natural gas occurrences in Pakistan, in Lee, A.I.N., ed., Fertilizer mineral occurrences...rare-earth minerals in monticellite-calcite carbonatite of the Oka Complex, Quebec: The Canadian Mineralogist...116-131. Dawson, K.R., and Currie, K.L., 1984, Carbonatite-hosted deposits, in Eckstrand, O.R., ed., Canadian |  | | Report (volume) | | carbonatites 53 TWYMAN, J. D. & GITTINS, J. Alkalic carbonatite magmas: parental or derivative ? 85 DAWSON...Outline of the petroIogy of the Kenya rift alkaline province 293 MACDONALD,R. Quaternary peralkaline silicic...petrochemistry of the northern part of the Chilwa alkaline province, Malawi 335 BOWDEN, P., BLACK, R., MARTIN, R...crystallization history of the Velasco alkaline province, eastern Bolivia 403 BARKER, D. S. Tertiary...alkaline magmatism in southern Greenland: the Gardar province 449 LARSEN, L. M. & SORENSEN, H. The Ilimaussaq |  | | Book | | MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...ilmenite Cl) 1stals were found in 2002 in a calcite-carbonatite vein intruding gneiss, together with very large...measuring 3 x 3 cm perched on prismatic black aegirine crystals, is in the Gilles Haineault collection...called "jacupirangite" found in the Jacupiranga carbonatite deposit is ilmenite, in lustrous, flattened crystals...measuring 2.5 X 8 X 12 cm (Pekov, 2000). ASIA PAKISTAN FORMER SOVIBT UNION RUSSIA Dodo deposit near |  | | Journal (volume) | | February 1987 in Luc Yen (a small city in Yen Bai province, N- Vietnam), this country is an important source...from Burma. On the way from the capital of the province, which is also named Yen Bai, to Luc Yen, a new...and rose quartz from the Borborema Pegmatitic Province (Brazil) irradiated with high gamma doses Barreto...granitic pegmatities located in Borborema Pegmatite Province (BPP, Brazil), it is common to find areas of rose...metamorphosed volcanic ejecta in association with augite, gehlenite and nepheline. It represents the largest |
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