 | | 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 |  | Gervilla, F., PadrĂłn-Navarta, J. A., Kerestedjian, T., Sergeeva, I., GonzĂĄlez-JimĂŠnez, J. M., Fanlo, I. (2012) Formation of ferrian chromite in podiform chromitites from the Golyamo Kamenyane serpentinite, Eastern Rhodopes, SE Bulgaria: a two-stage process. Contributions to Mineralogy and Petrology, 164 (4) 643-657 doi:10.1007/s00410-012-0763-3 | Journal (article/letter/editorial) | | mineral with wide but variable composition in the central region of the MgAl2O4âFeAl2O4âMgCr2O4âFeCr2O4 plane)...petrogenetic indicator (Irvine 1965, 1967; Jackson 1969; Hill and Roeder 1974; Maurel and Maurel 1982; Sack 1982;...up of antigorite (frequently retrograded into chrysotile) and talc, with minor relict olivine, chlorite...proportions of relict olivine, antigorite, lizardite/chrysotile, chlorite, chromium spinel and tremolite, depending...and locally minor antigorite (partly altered to chrysotile), amphibole, talc and rutile. Chromite from massive |  | | Journal (issue) | | of zircons in heattreated corundum from Chimwadzulu Hill, Malawi, is due to melting and interaction of...were reproducible to within 1 or 2 cm*1. Chimwadzulu Hill, Malawi (Rankin, 2002) show distinctive changes...pale blue/green sapphires from the Chimwadzulu Hill deposit of Malawi. Details of the temperatures to which...and Morelli, 2000). This suggests that in the Chimwadzulu corundum where melt textures are observed, and...Agricola Resources, pic for providing samples from Chimwadzulu. We also thank our colleagues at Kingston University |  | | Journal (issue) | | Leidian freshwater pearl. Zhejiang. Journal of Central South University of Technology, 29(2), 111-15 Ponahlo...account of the geology and mineralogy of the Ligurian region. Figure 1: Orientation map. Figure 2: Nephrite...Nephrite occurrence Monte Bianco Domenico Pass Libiola Hill Gallinaria Mine (Casarza Ligure) Casa di Bonelli...war years due to the strategic importance of the region for naval purposes, the area appears reasonably...main constituents of the rock are lizardite, chrysotile and bastite pseudomorphs after orthopyroxene |  | | Journal (article/letter/editorial) | | 1â420 by a pilot project on mineral deposits in Central Europe and in the spreadsheet classiďŹcation scheme...epigenetic and diagenetic mineral deposits in Central Europe . . . . . . . 54. Conclusions â 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) | | 1â420 by a pilot project on mineral deposits in Central Europe and in the spreadsheet classiďŹcation scheme...epigenetic and diagenetic mineral deposits in Central Europe . . . . . . . 54. Conclusions â 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) | | cultured pearls from Japan ⢠New ruby production from Malawi ⢠Pink to pink-orange spinel from Tanzania ⢠Large...is produced at low pressures, typically in the region of one-tenth of atmospheric pressure, from carbon-con-...grown on a substrate held at a temperature in the region of 800â1000°C. For many industrial applications...carried out at temperatures and pressures (in the region of GEMS & GEMOLOGY SPRING 2004 3 Figure 2...absorption could be detected in the one-phonon region of the infrared spectrum and the material was therefore |  | | 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 Burmaâs Mandalay Division. These are sometimes...(Gravender, 1934). Mining apparently halted in the region during World War II and its aftermath. It eventually |  | | Journal (article/letter/editorial) | | California Wyoming Washington Alaska and Canada Mexico, Central and South America Africa and Oceania The Union...University] at 09:42 14 March 2015 California. Massa Hill, Marin County. As described by Chesterman (1951)...Mexico, Central and South America. Nephrite appears to be non-existent in Mexico and Central America...term, "nephrite," is related to the history of Central America. According to ancient Aztec lore, the precious...nephrite deposit in Africa (Bloomfield, 1958), Chimwadzulu Hill, southern Nyasaland, where a chain of basic |  | | 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 |  | | Book | | VULCANICITY AND CONTINENTAL EVOLUTION IN THE BARBERTON REGION, TRANSVAAL 27 M. J. Viljoen and R. P. Viljoen...OF THE KIBARIDE AND KATANGIDE OROGENIC BELTS OF CENTRAL AFRICA 97 L. Cahen OROGENIC AND POST-OROGENIC...PETROCHEMICAL AND TECTONIC RELATIONSHIP OF THE MALAWI CARBONATITEALKALINE PROVINCE AND THE LUPATA-LEBOMBO...geochronology of specific regions such as northern and central Africa (Cahen, 1961, 1963), southern Africa (Nicolaysen...two contrasted portions: (i) the major part of central Tanzania composed largely of granite, granodiorite |  | | Journal (issue) | | 1r-poles show a definite tendency to spread from a central ma.ximum. Fig. 19b shows measurements plotted from...diagram for comparison. Fig. 30a is from a small hill of gneiss at Lormoto in the centre of the Namanga-Bissel...subordinate limestones and shales, in the eastern and central part of the country. On the plateau, these beds...suitably exposed for quarrying. A contour map of the hill has been made by Warden (1957), who also carried...Small lenses are also encountered elsewhere in the region, and insignificant amounts of oxides are found |  | | Book (edition) | | metamorphism the temperature and pressure conditions in a region may rise greatly over a period of time. A given...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...Birefringence: (Bi, Sb) (Ta, Nb)Os. Colors: Density: Hill, Cleavage: See also: Tantalite, Stibio- Crystallography:...Secondary mineral in Cu and Pb deposits. Chile; Broken Hill, N.S. W., Australia. Boleo, Baja California: magnificent |  | | 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 Š 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 |  | | Journal (issue) | | built up the geomorphological history of East and Central Africa from the pre-Karroo onwards. His careful...Several years of prospecting work narrowed down tl-ie region of economic interest to an area around Koidu, 8°...different times on the region and their findings are summarised below. The region is composed almost entirely... and 6,000 ft., the nearest relict area to the region of the kimberlite outcrops being at a height of...ft. As the average elevation of the kimberlite region is only about I ,200 ft., it would thus appear |  | | Report (issue) | | Southern Wales and Welsh Marches District ⢠⢠Central and South Midlands District ⢠⢠⢠⢠East Anglia...polarisation surveys for porphyry coppers near Monywa, Central Burma. 2. Securing the detonator to the charge...Unit - Southern Wale'3 and Welsh Marches Unit - Central and South Midlands Unit - East Anglia and South-East...Beds and London Clay a1¡e all heavily masked, on hill slopes as well as in the valleys. In contrast, drift...constantly been drawn upon by such organisations as the Central Electricity Generating Board. Deep exploratory |  | | Book (edition) | | and pressure conditions in a most clearly seen region may in rise greatly over a period of time....(vividness) of the hue increases moving outward from the central axis. Figure 2 shows that the range of chroma varies...Prussia (now U.S.S.R.): Succinite Entire Baltic Sea region, including Poland, East Germany, Norway, Denmark;...Arizona; New Mexico; Coeur d'Alene district, Idaho. Hill, = 1 Anglesite gems are colorless to pale brown...diagnostic. Luminescence: Occurrence: Gamba data. Hill, None. Pegmatites. Uganda; Acari, Brazil. Inclusions: |  | | Journal (issue) | | and Metamorphic Petrology.'' (New York : McGra,v Hill.) ⢠THE APPLICATION OF A PUNCHED CARD 39...M11bende and Masaka Districts and was started in central Acholi District. Three quarter-degree sheets were...carried out on occurrences of soapstonein the Central Province, and on the Buanji and Ukinga Series around...Having completed the detailed mapping of the Chimwadzulu Hill in the Kirk area, Mr. Bloomfield returned...quarried for lime by local Africans. Chipilanje Hill and much of the country to the south ofit, between |  | | Journal (volume) | | Rhexoxylon and Dadoxylon from the Lower Shire Region of Nyasaland and Portuguese East Africa . By Professor...182 Geological Reconnaissance of Parts of the Central Islands of the British Solomon Islands Protectorate... 1949-54 Some Aspects of the Geomorphology of Central and Southern Africa The Mining Journal, Annual...Rhexoxylon africanum Banc . Half the expanded Pith Region of a large Stem, with Shreds of normal Secondary...of Lower Shire Valley facing p. fig . 1 Namalambo Hill , Lower Shire Plate I fig. 2 Alluvium at Chikwawa |  | | Journal (issue) | | Mfwanganu looking up the dip-slope Miocene from Kiwari Hill . . ,, of the . . . Sketch map of Mfwanganu Island...1aL>orator)', 1110n a zi tc from Kangar1ku 11de Hill. is separated from slrontianile b)¡ 111ean' of tl1e...reasonably reliable estimate of thickness in this region can be given, but it is fairly certain that tl1ey...almost continuously from Kia Passage along the central portion of Barora Island, through Popu Channel...south-west or west, perhaps the New GeorgiaChoiseul region, and that although there was some deposition over | | | Book (edition) | | metamorphism the temperature and pressure conditions in a region may rise greatly over a period of time. A given...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:...Secondary mineral in Cu and P b deposits . Chile; Broken Hill, N.S. W., A ustralia. Boleo, Baja California: magnificent...England; Urngban, Sž eden. Franklin and Sterling Hill, Ne,,¡ Jerse_i: in fine crystals. Iwate and Yamagata |  | | Journal (issue) | | of which silent and effortless punching ofthe central round hole will be possible. WRITE FOR ILLUSTRATED...Map of Lower Shire Valley ⢠⢠,, fig. 1 Namalambo Hill, Lower Shire Plate I ⢠⢠,, fig. 2 Alluvium at Chikwawa...ofpedisediment deposits-or masses of debris carried down hill by gravitation, rain wash and stream action in the...reappears near the Dandi, just north of Namalambo Hill (Plate I, fig. 1), and passes to the west of that...south of the Tangadzi West, beginning with Namalambo Hill opposite Chiromo (seeaccompanying map). From the |  | | 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 recently, it has been found that where a region is saturated with water, jadeite can form in veins |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...southwest of Amity (Chamberlain and Robinson, 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba...itself 40 km northwest of Lac Saint-Jean in south-central Quebec, very large and sharp ilmenite Cl) 1stals...Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing the ilmenite...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during |  | | Book (edition) | | Lorique Louis de berquen Loupe Lustre Madagascar Malawi Malleable Marcel tolkowsky Marilyn monroe Marquise...laboratories have confirmed that the material from this region gets its incredible colours naturally from Mother...have found this fantastic gemstone). Mining in the region at the famous âShallow Nobbyâs Mineâ started in...Australia 61 is rife. This Diamond mine in the region of Kimberley is said to now be the biggest single...Due to the difficult weather and terrain in the region, it is only possible to operate these Axinite mines |
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