 | | Journal (article/letter/editorial) | | Chromite-chlorite intergrowths in peridotite at Chimwadzulu Hill, Malawi H. W. HASLAM Institute of Geological Sciences...intergrown in serpentinized peridotites at Chimwadzulu Hill. The peridotites probably crystallized from...observed chromite-chlorite association. THE Chimwadzulu Hill ultrabasic body (Bloomfield, 1958) lies at...southern Malawi. It covers about 0"7 km 2, and is surrounded by gneisses and schists of the Malawi Basement...RZ+R~+04. A to 2 2 in a peridotite (Geol. Surv. Malawi no. H H 5 3 , I.G.S. no. F7793), c o n t a i n |  | | Journal (article/letter/editorial) | | 918 TOPOGRAPHICAL INDEX Puy Forestier, Massif Central, France, basanite, clinopyroxene, titanomagnetite...basalt, ultrabasic xenoliths, I53 Teldes, Massif Central, France, basanite, clinopyroxene, titanomagnetite...Palisse, Allier, zircon, 790 Vernegoux, Massif Central, France, basanite, clinopyroxene, titanomagnetite... amphibole granulite, hypersthene, diopside, almandine, 54I Japan (Nippon) Arayashiki, Ishikawa-gun,...pyroxenite, titanaugite, kaersutite, analcime, 611 Malawi Sierra Leone Freetown, magnetite, ilmenite, troctolite |  | | Corporate Document | | Republic of Malawi Ministry of Mining Final Report of the Project for Establishment of Integrated Geographic...Development Co., Ltd. dummy Frontispiece 1 Map of Malawi Former capital: Zomba Headquarters of Geological...Lake Chilwa located in the southeastern part of Malawi and Chisi Island: Chisi Island is composed of syenite...Lake Malawi Upper right: Syenite distributed in Chilwa Alkaline Province in the south of Malawi (Cretaceous.............................. 19 3. The Works in Malawi .............................................. |  | | Journal (article/letter/editorial) | | Pakistan, anal., opt., 53; Sri Lanka, anal., 541 ; Central Australia, anal., 589 'Alum', Valcano, Italy, anal...141 Brochantite, Kirkcudbrightshire, 893 Broken Hill, New South Wales, sillimanite, 3o3; magnesian smithsonite...L.), see HUTCnISON(R.), 153 Champagnac, Massif Central, Prance, leuciterh6nile basanites, 817 CHANG (L...L. Y.), see CHEN (T. T.), 3o7 Charhls, Massif Central, France, leucite rh6nite basanites, 8i7 Charnockite...CtlANG (L. L. Y.), High-Mg smithsonite from Broken Hill, N.S.W., 3o7 Chichibu mine, Saitama prefecture, |  | | Journal (issue) | | occurrences of the mineral (e.g. in Australia, Malawi, Thailand, Cambodia, etc.), often producing too...material. The question arises why sapphire from this region is so highly regarded. The fantasy is, of course...(ruby and and padparadscha) padparadscha) from Malawi Dr Dr H. F. H. Bank Dr U. U. Hennl, Henn , Prof...Southern Malawi was (1958). The The locality described is is situated on on the the Chimwadzulu Hill, approximately...1989, one of the authors has visited at the Chimwadzulu Hill (Figure 2) and the mine at © © Copyright |  | | Journal (issue) | | ........................................... 34 Malawi .................................................minister of mineral resources who said he believed the region needed new areas to prospect, as there have been...of machinery miners operating at present in the Central Queensland Fields, however, the number of hand...claims, and fuel prices are still on the rise. A central Queensland sapphire miner named Elias Christianos...Cynthia Renee. Photo: Robert Weldon. T he border region of northern Paraiba and southern Rio Grande do |  | | Journal (issue) | | to 1" long a n d Y in diameter. Most contain a central core of green emerald from which sprout six arms...whitish-grey material. O t h e r examples have no central core at one e n d a n d yet display it at the other...area. T h e first stage was the growth of the central prism which is hexagonal a n d slightly tapered...corners was simultaneous with the growth of the central area, since if the reverse were true the growth...By powder X-ray diffraction the material in the central core a n d the side arms has been shown to be beryl |  | | Journal (issue) | | these gems. 322 Rubies and Sapphires from Winza, Central Tanzania Dietmar Schwarz, Vincent Pardieu, John...“D-TO-Z” DIAMONDS diamonds from the Cape of Good Hope region, and “Jager” for colorless diamonds with strong...the blue region of the spectrum, as it is the absorption area of wavelengths in this region that allows...the 6-watt lamps used in the past. Here, the UV region shows good agreement between the three lamps. Note...that results in an additional emission in the red region between 620 and 700 nm that does not have a noticeable |  | | Journal (issue) | | main shareholders were Anglo-American Group, 45%; Central Holdings, the Oppenheimer family trust, 45%; and...nation’s output for resale to cutting operations (Hill, 2008). The State Diamond Trader’s office opened...of 2008, the market went into a severe decline (Hill, 2009). Alrosa. After it was required—not without...with the opening of a new mine in the Nova Era region and technological developments at established mines...acquisition of the “Tsavorite Project” from Green Hill Mining Ltd. and Figure 11. This 8.72 ct green zoisite |  | | Journal (article/letter/editorial) | | 1–420 by a pilot project on mineral deposits in Central Europe and in the spreadsheet classification scheme...epigenetic and diagenetic mineral deposits in Central Europe . . . . . . . 54. Conclusions — the importance...numerous and in this context some studies from Central Europe may be quoted as representative of this...on fossil fuels, ore and industrial minerals in Central Europe two separate approaches have been taken...crustal consolidation of what is called today Central Europe: (1) stratabound deposits, (2) thrust-bound | | | Journal (article/letter/editorial) | | 1–420 by a pilot project on mineral deposits in Central Europe and in the spreadsheet classification scheme...epigenetic and diagenetic mineral deposits in Central Europe . . . . . . . 54. Conclusions — the importance...numerous and in this context some studies from Central Europe may be quoted as representative of this...on fossil fuels, ore and industrial minerals in Central Europe two separate approaches have been taken...crustal consolidation of what is called today Central Europe: (1) stratabound deposits, (2) thrust-bound |  | | Journal (issue) | | Madagascar), South America (Brazil and Colombia), central and southern Asia (Sri Lanka, India, Afghanistan...The major sources for diamonds were Australia, central and southern Africa (Botswana, South Africa, Namibia...the country rather than to the specific mine or region. For more on the specific localities, consult tables...mines have prompted active exploration in this region (Schwarz, 1999). Emerald mining also continued...the Lukusuzi game park area in Zambia (bordering Malawi and Mozambique) used creative methods to obtain |  | | Journal (issue) | | nickel (depending on the color desired) into a region that extends just below the surface of the otherwise...permitted microprobe analysis of both the near-surface region affected by the diffusion treatment process, as...were taken i n a central colorless part (spectrum a), and i n the outer blue region (spectrum b), of...highly civilized, complex societies flourished in Central America, including the Olmecs, the Mayans, and...ancient civilizations have been unearthed throughout Central America, Mexico, and even Peru; yet the actual |  | | Journal (issue) | | Breakdown Spectrometer (LIBS), which costs only in the region of US$75,000. The unit does generate circular pits...result of the impact—a question that became the central dispute in the case (Federman, 1998b). The customer...desk-model spectroscope), as well as the broad region of absorption below 500 nm that is responsible...Besides the absorption below 500 nm, there is a region of absorption from 500 to about 620 nm, as well...this 0.28 ct faceted sample results from the broad region of absorption beginning below about 500 nm. Superimposed |  | | Book (edition) | | metamorphism the temperature and pressure conditions in a region may rise greatly over a period of time. A given...analysis, as for example in distinguishing between almandine garnet and ruby. The polariscope is also useful...fragile for jewelry; strictly collector item. ALMANDINE See: Garnet. Name: After Mr. Gilbert Adam, mineralogist...Prussia: Succinite (now U.S.S.R.). Entire Baltic Sea region, including Poland, E. Germany, Norway, Denmark;...Dundas, England; Sardinia; Scotland; Broken Hill, Wales; N.S.W., Tasmania. Morocco: gem crystals |  | | Journal (issue) | | 1). The recent discoveries of sapphires in the region between Ambilobe and Antsiranana, the former Diego...rocks) of Jurassic age (Hall et al., 1995) at Sibela Hill in the centre of Bacan. During the Middle Miocene...‘Older volcanic rocks’ has been reported from the central Kasiruta island (Djaswadi et al., 1990). Figure...(Sujatmiko, 2004). The main mining area was on Majiko Hill with 17 groups Figure 4: A volcanic breccia between...opening Figure 5: Small scale surface mining at Pido Hill exposes the pillow lava structure (irregular oval |  | | Journal (issue) | | Vishnevye Mts. in the Urals, a famous pegmatite region about 100 km south of Ekaterinberg, were purchased...exploration potential that exists in the surrounding region. Historical background Archaeologically, nephrite...locality have been found scattered throughout central and © Gemmological Association and Gem Testing...were promoted as the principle nephrite-producing region for the Soviet Bloc countries and this appears...structural high and the oldest tectonic element in the region. These Precambrian rocks are unconformably overlain |  | | Book (edition) | | is an imprint of Elsevier Linacre House, Jordan Hill, Oxford OX2 8DP, UK 30 Corporate Drive, Suite 400...an inner solid region of diameter 2440 km and density about 8 gcm3, and an outer region about 2260 km...alumina, alkalis and the rarer elements. If the region is quiescent and all the magma solidifies in the...if about half way through crystallization, the region becomes 8 Rocks and the Processes That Formed...more than the others, and, for example, some almandine garnet crystals may grow to several centimetres |  | | Book (edition) | | and pressure conditions in a most clearly seen region may in rise greatly over a period of time....very rapid and unamin distinguishing between almandine garnet and ruby. The polariscope is useful in...Paterson, New Jersey Anhydrite: Ontario, Canada Almandine: Gore Mountain, New York Staurolite: Georgia...(vividness) of the hue increases moving outward from the central axis. Figure 2 shows that the range of chroma varies...3YR 4.4/5.9 3.8/3.5 4.7/5.2 2.4/10.6 Pyrope- Almandine medium Rhodolite Spessartine dark light |  | | Book | | nucleation initiation of crystal growth. nucleus the central portion of an atom, positively charged and containing...polysynthetic twinning show as parallel lines. Almandine garnet, apatite and pyrrhotite crystals are found...other orange stones such as fire opal. The pyrope-almandine series contains apatite, mica, quartz, spinel...relationship of the particles to a solar system with a central nucleus surrounded by circling electrons at different...several different series, that between pyrope and almandine being the most obvious. Exsolution Solid solutions |  | | Journal (issue) | | Sciences, London . . . . . Geological Survey of Malawi. By R. T. Cannon, BSc, PhD, . . . MIMM,formerly... Illustrations Geological Survey of Malawi Fig. 1. Geology of Malawi: after Geological map of the Federa...Develop ment, with special reference to East and Central Africa. The guests and delegates were to be invited...from Burundi, Canada, Ethiopia, Germany, Kenya, Malawi, Sudan, Tanzania, UAR, Uganda, UK, USA, USSR and...the earth sciences. Geological surveys play a central role in the process. I conclude by wishing the |  | | Report (issue) | | Southern Wales and Welsh Marches District • • • • Central and South Midlands District • • • East Anglia and...the lnstitute's advice is sought. Thus, in the Central and South Midlands District, the Redditch New Town...Board have been towards attracting industry to the region, and the area around the inner Moray Firth has...were carried out in 25 countries in south and central America, the Near East, the Far East, Africa and...in reconnaissance in the extremely inhospitable region of Navarino and adjoining islands in the neighbourhood | | | Book (edition) | | metamorphism the temperature and pressure conditions in a region may rise greatly over a period of time. A given...analysis, as for example in distinguishing between almandine garnet and ruby. The polariscope is also useful...fragile for 3ewelry: strictly collector item. ALMANDINE See: Garnet. Name: After Mr. Gilbert Adam, mineralogist...Prussia: Succinite (now U.S.S.R.). Entire Baltic Sea region, including Poland, E. Germany, Norway Denmark;...Scotland; T-J1a/es; U.S.S.R.; Germany; Sardinia; Broken Hill, 1V.S. W., Australia; Dundas, Tasmania. Morocco: |  | | Journal (issue) | | 271 Chrysoprase and Prase Opal from Haneti, Central Tanzania James E. Shigley, Brendan M. Laurs, and...Kashmir (in what is now the Indian part of the region) in 1881 after a landslide revealed the blue gems...remoteness of the deposit and military activity in the region. Myanmar. Burma (known as Myanmar since 1989) has...medium-to-dark tones that were mined from the Mogok region, in Burma’s Mandalay Division. These are sometimes...(Gravender, 1934). Mining apparently halted in the region during World War II and its aftermath. It eventually |  | | Journal (issue) | | Rhodizite-Londonite from the Antsongombato Pegmatite, Central Madagascar Brendan M. Laurs, Federico Pezzotta...from Kazakhstan • New emerald find from the Chivor region, Colombia • New jadeite from Guatemala • Milarite...gem-quality synthetic yellow diamond produced in the region of Vladimir (Russia). Journal of Gemmology, Vol... RHODIZITE-LONDONITE FROM THE ANTSONGOMBATO PEGMATITE, CENTRAL MADAGASCAR By Brendan M. Laurs, Federico Pezzotta...gem-quality londonite is the Antsongombato pegmatite in central Madagascar, from which at least 300 carats of rhodizitelondonite |
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