| | Journal (article/letter/editorial) | ORIGINAL PAPER Petrogenesis of the Eppawala carbonatites, Sri Lanka: A cathodoluminescence and electron...the crystallization processes in the Eppawala carbonatites, Sri Lanka. The well preserved magmatic textures...Geology, University of Peradeniya, Peradeniya, Sri Lanka e-mail: apitawala@pdn.ac.lk B. G. Lottermoser...major rock-forming minerals of the Eppawala carbonatites, Sri Lanka. These data have been used to establish...KC HC VC Eppawala 8 O The Eppawala area Physiography and mining activities The Eppawala study area | | | Journal (article/letter/editorial) | petrological characteristics of Eppawala phosphate deposits, Sri Lanka Received: 15 August 2000 / Accepted:...Abstract The apatite-bearing carbonate rocks at Eppawala, Sri Lanka occur as massive, discontinuous bodies in...important phosphate deposits. The ore bodies at Eppawala contain £42% P2O5, and citric acid solubility...magnetite, pyrite, forsterite, phlogopite, enstatite, magnesite, diopside, tremolite and spinel. Most of minerals...a few millimetres to several decimetres). The Eppawala rocks are characterised by low silica (£0.41%) | | | Journal (article/letter/editorial) | carbonatites occur in India, Pakistan, Afghanistan and Sri Lanka; but so far not known to occur in Nepal, Bhutan...and Jawar), Afghanistan (Khanneshin) and Sri Lanka (Eppawala). This review provide the comprehensive information...(MH) – 440001, India; Geological Survey of India, Central Region, Seminary Hills, Nagpur (MH) – 440006, India...Amba Dongar, Koga, Peshawar Plain, Khanneshin, Eppawala 1 Introduction Carbonatite melts are known to...Pakistan [12, 28, 29, 54], Afghanistan [35], and Sri Lanka [32, 36]. amount of data on trace elements and | | | Journal (issue) | Winter Branch Chairmen: Midlands - G.M. Green, North West - I. Knight, Scottish - B. Jackson, South West...iridescent chatoyancy Grey orthoclase moonstone from Sri Lanka has a unique combination of a cat's-eye and a...Brazil and another colourless of 12.20 ct from Sri Lanka, but this specimen is considerably larger. Two...Moonstone with a star and cat'seye combination from Sri Lanka Sunstone cat's-eye from Russia A stone described...purchased in Germany and probably comes from Sri Lanka, where a similar one was offered to the author | | | Journal (article/letter/editorial) | inclusions of high-T melts, pure CO2-fluids, magnesite and graphite. Apatite is the major carrier of...around Perunthol village is located in the Kollam district of Kerala and lies within the Late Neoproterozoic...granulite facies rocks of Madurai Block (MB) in North (Drury et al., 1984; Harris et al., 1994). All these...found coexistence of CO2–graphite, CO2–magnesite, and magnesite–graphite inclusions within the spinel...graphite and magnesite inclusions within the spinel. Please note the coexistence of graphite–magnesite and CO2–magnesite | | | Book | Sulfur Talc 260 265 274 Vermiculite 145 Magnesite & magnesia Manganese minerals 255 Titanium &...major producing districts, or a representative district if there are many. We name the chief mining companies...graphite supply must come not merely from one district but from a single mine. Thus the physical properties...extremes of unit value and place value. Although the central realm of the industrial minerals and rocks is clear...a source of magnesia is eclipsing the mineral magnesite in some areas; the trona mine rather than the | | | Journal (issue) | Number 2 TABLE OF CONTENTS FEATURE ARTICLES 62 Sri Lanka: The Gem Island Peter C. Zwnan The Identification...a n y fine gemstones found on the island o f Sri Lanka, the subject of Peter Zwaan's article i n this...this issue. This fine 9.57-ct cabochon from Sri Lanka is pictured here against a 19th century lithograph...not of the publishers. SRI LANKA: THE GEM ISLAND By Peter C. Zwaan Sri Lanka, formerly Ceylon, remains...mined by primitive methods. In many instances, the Sri Lankan origin of the gemstone can be determined by | | | 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..., eds., Mineral Deposits of Europe, volume 3: Central Europe: London, The Institution of Mining and Metallurgy...Detterman, R.L., 1989, Triassic phosphate deposits, north-eastern Alaska, USA, in Notholt, A.J.G., Sheldon...Precambrian Champaner Group, near Gandhra, Panchmahal District, Gujarat, in Rao, G.V., Dasgupta, S.P., Pant, | | | Journal (issue) | instrumentation such as LA-ICPMS—once primarily the province of academia—became a fixture in many gemological...main shareholders were Anglo-American Group, 45%; Central Holdings, the Oppenheimer family trust, 45%; and...were combined under the jurisdiction of the U.S. District Court of New Jersey 168 PRODUCTION AND MARKETS...addition to the traditional spinel sources of Sri Lanka, Pakistan, and Myanmar (spinel, if polished elsewhere...start operations at the Kagem mine in the Kafubu District, historically Zambia’s largest source of emeralds | | | Report (issue) | Sci.) North America Central and South America Australasia Far East Southern Africa Central and East...East Africa West Africa North Africa and the Middle East Northern Europe Western Europe Eastern Europe...fale micolame)a-mmit-lelig- mom) eerele] in the North-East of the “lron Square“. Apart from rich ore,...Hafnium IImenite Indium Iron Ore Lead Lithium Magnesite Magnesium Manganese Mercury Potash Steel Sulphur...Canada Cameroons Caribbean Countries Central African Empire Central American Countries Chad Chile China | | | Book | Floral Province ..................................................... 1.5.2 Zagros Floral Province ........................... 1.5.3 Iran’s Central Plateau Floral Province ............................... 1.5...5.4 Southern Coastal Plains Floral Province ............................ 1.6 Summarized Facts About Vegetation......................................... 1.10.3 Central Mountains .............................................................................. 2.1.1 Central Iran.......................................... | | | Book | affects its present characteristics as a minera1 province, because of the exposure of the various depth...Buddington (1959) in his classical paper on the North American granites, proposed a three-fold depth subdivision...multiphase, nested, and include a subsidence of the central block and the downward passage of tabular plutons...Peru, map and distribution of ore deposits in the central sector. Based on the Mapa Metalogenico del Peru...Arequipa, Toquepala-Cerro Verde district; in the centre, Morococha and in the north, Michiquillay) straddle the | | | Book | affects its present characteristics as a mineral province, because of the exposure of the various depth...Buddington (1959) in his classical paper on the North American granites, proposed a three-fold depth subdivision...multiphase, nested, and include a subsidence of the central block and the downward passage of tabular plutons...Peru, map and distribution of ore deposits in the central sector. Based on the Mapa Metalogenico del Peru...Arequipa, Toquepala-Cerro Verde district; in the centre, Morococha and in the north, Michiquillay) straddle the |
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