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| CHROME VANADIUM TANTALITE RUTILE COLUMBITE ILMENITE BERYL ·ZIRCON AND OTHER MINERALS • • FERRO-ALLOYS...Kimberlite in Sierra Leone. By D. R. Grantham, Ph ..D., M.I.M.M., F.G.S., Sierra Leone Selection Trust...SURVEYS Uganda • • • • • • Tanganyika • • • • • • Northern Rhodesia • • • • • Nyasaland • • • • • • • Somaliland...Dixey, C.M.G., F.R.S. • • • Kimberlites in Sierra Leone Plate I Photomicrographs 1. 2. of Kimberlite...garnet and recrystallised pyroxene Plate III Sierra Leone Diamonds . . . • • 1. Elongated 'glassy' octahedron |
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| TANT'ALITE · AM BLYGONITE COLUMBITE RUTILE ILMENITE BERYL ZIRCON AND O·THER M,I.NERALS BUYERS...Anorthosites in the Colony Complex near Freetown, Sierra Leone. By M. K. Wells, M.Sc., Ph.D., and C. 0. Baker... • COLONIAL GEOLOGICAL ABSTRACTS Part 11. Sierra Leone • • BOOK REVIEWS The Birth and Development...Illustrations • Anorthositesnear Freetown, Sierra Leone Plate I Plate II Plate III Text-fig. 1 Text-fig... or Monomo, Anorthosite Photomicrographs of Sierra Leone Anorthosites '' Rhexoxylon and Dadoxylonfrom |
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| TANTALITE . AMBL YGONITE COLUMBITE RUTILE ILMENITE AND OTHER ZIRCON BERYL Ml NERALS BUYERS OF...Ijolites at Songo, Sierra Leone. By C. 0. Baker, B.Sc., and Vladi Marmo, Dr.Ph., Sierra LeoneGeologicalSurvey...SURVEYS Kenya • • • • • • • • Tanganyika • • • • Northern Rhodesia • • • • • Nyasaland • • • • • • • Bechuanaland...• • Occurrence of Helium-bearing Gases in Lake Province, Tanganyika Platinum Metals Review . . . Sedimentological...393 393 393 398 399 404 ljolites at Songo, Sierra Leone Plate I Text-fig. 1 Text-fig~ 2 Text-fig. 3 |
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| CHROME VANA'DIUM TANTALITE RUTILE COLUMBITE ILMENITE BERYL ZIRCON . AN'D OTHER M'l;NERALS • • I.... . . 245 Rapid Determination of Titania in Ilmenite-Cassiterite Ores. By L. P. Cheong, B.Sc., A.R... • • • • • • • 289 292 Kenya. Uganda Northern Rhodesia Nyasaland • • • • • • • • •...316 • • • • • 318 • • • • • 319 Sierra Leone • Federation of Malaya • British Territories...No. 3: '' The Chromiferous Ultrabasic Eastern Sierra Leone '' • • • • • Minerals and Mines in Africa • |
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| SPECIALIST Ass!STANCE KENYA UGANDA TANGANYIKA 44 NORTHERN RHODESIA. 48 57 59 62 NYASALAND SoMALILAND PROTECTORATE...Somaliland Geological Surveys 61 New Survey Building, Northern Rhodesia Plate XI " 78 Views from the Gold Coast...Geological Survey Plate XII " Field Activities of the Sierra Leone Geological Plate XIII 79 Survey " Activities..." Text-fig. 3 Progress of Geological Mapping, Northern Rhodesia 45 " Geological Mapping in Nyasaland...76 " Text-fig. 11 Geological Mapping by the Sierra Leone Geological Survey 82 " Text-fig. 12 Geological |
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| TANTALITE AMBL YGONITE COLUMBITE RUT'ILE ILMENITE BERYL . ZIRCON AND OTHER MINERALS • BUYERS...Ph. (Helsinki), GeologicalSurvey Department, Sierra Leone . . The Location of Underground Water Supplies...SURVEYS Kenya • • • Uganda • • • Tanganyika • Northern Rhodesia • Nyasaland • • • Bechuanaland • • Nigeria... . . . . Manner of Occurrence of Microcline in Sierra L,eone Granites . . . . . page 430 '' 433...extends in a south-westerly direction from the northern shore of Lake Victoria, and is dominated in the |
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| SouthAfrica andto the Governments of SouthernRhodesia,Northern Rhodesia,Nyasa/and and Tanganyika. CAPITAL AUTHORISED...MOLYBDENITE TANTALITE AMBLYGONITE COLUMBITE ILMENITE RUTILE BERYL · ZIRCON AND OTHER MINERALS ...RESOURCES DIVISI01V The Lignite Deposits of Sierra Leone. By J. D. Pollett, A.R.S.M., A.M.I.M.M., Geologist...Geologist, Geological Survey Department, Sierra Leone, and H. J. Broughton, A.R.l.C., Mineral Resources...Tanganyika Kenya Uganda . Nigeria Bechuanaland , Sierra Leone Federation of Malaya British Guiana . GEOLOGICAL |
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| variety of inclusions such as graphite. magnetite, ilmenite, garnet (usually pyrope). chrome-diopside, chlorite...l % pounds!); Excelsior. 995 carats; Star of Sierra Leone. 969 carats; Woyie River, 770 carats; President...reviews of lites in Iron and Dickinson Counties in northern Michigan. the genesis and world Occurrencesof...typically available from the Guanaimo region, Bolivar Province. In 1942 the exceptionally fine 155-carat Liberator...mine known PR the “Big Hole” ut Klmberley, Northern Province, Dundo region, Lunda Norte South Africa, mi |
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| 7 The geology and mineral resources of northern Sierra Leone A. Macfarlane, M. J. Crow,]. W. Arthurs...1981. The geology and mineral resources of northern Sierra Leone. Overseas Nlem. Inst. Ceo{. Sci., No. 7...Scarcies River confluence 66 TheKambia area 66 The northern Sula Mountains 67 Nickel 67 Cassiterite 67 Columbite-tantalite...processing 79 Appendix 2 The geochronology of Sierra Leone Post tectonic intrusives 89 The Rokelide Belt...The Basement Complex 92 The Eburnian event in Sierra Leone 92 The concept of age provinces 93 The Liberian |
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| Anorthosites in the Colony Complex near Freetown, Sierra Leone. By M. K. Wells, M.Sc. , Ph.D., and C. O. Baker...Ijolites at Songo, Sierra Leone. By C. O. Baker, B.Sc., and Vladi Marmo, Dr.Ph., Sierra Leone Geological Survey...GEOLOGICAL SURVEYS Kenya Uganda Tanganyika . Northern Rhodesia Nyasaland . Somaliland . Bechuanaland...Swaziland Federation of Nigeria Gold Coast . Sierra Leone Federation of Malaya British Territories in...for Uranium and Thorium Mineral Production in Northern Rhodesia Crust of the Earth Statistical Summary |
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| Geological comparison of Guiana Shield and Sierra Leone (W. Africa) . . . . . . . . . . Acknowledgements...are the old, deep, transeurrent faults in the northern part of the Guiana Shield which trend approximately...later has rejuvenesced (Fig. 5). In the Northern Geological Province the large "Barama-Mazaruni Orthogeosyncline"...(WILLIAMSet al., 1967). In the Southern Geological Province, the "Rupununi-Assemblage", forming the southern...dolerites of the Minor Dyke suite from the Southern Province has given a younger age - - 450 m.y. (McDouGALLet |
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| SURVEY'S Kenya • • • Uganda . • Tanganyika • • Northern Rhodesia • Nyasaland . • • . 4 • • •...and has only occasionally Anatase, Brookite 02 Ilmenite Fe7703 P s e u d o b r o o k i t e F e 2 T i...pointing upwards. + Theoretical dipole field in the northern hemisphere. * Theoretical dipole field in the...of the Columbia River basalts in Washington and northern Oregon." J . geophys. Res., Vol. 61, No. 3, pp...by L. D. Sanders and Dr. E. P. Saggerson, from Northern Rhodesia by H. Gair, from Bechuanaland by D. Green |
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| MANGANESE CHROME VANADIUM COLUMBITE TAN.TALITE ILMENITE RUTILE BERYL ' ZIRCON AND OTHER MINERALS...Complex of Sierra Leone. By C. 0. Baker, B.Sc., GeologicalSurvey Department, Sierra Leone, and M. H....GEOLOGICAL SURVEYS Uganda • • • Tanganyika • • Northern Rhodesia Nyasaland • • • Nigeria • • • British.... . . . Dixeyite-A New Mineral from Central Sierra Leone • Mineral Resources of East and Central Africa...Gravity Survey over the Freetown Basic Complex of Sierra Leone Fig. Observed gravity anomalies along the York |
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| deposit (Mpumalanga Province), the Kalahari manganese field (Northern Cape Province) and the Rustenburg...Bushveld Complex (in North-West, Mpumalanga and Northern Provinces). Sixteen (16) of the valid species...chromite Mg-Al titanomagnetite Mg-Gr-ilmenite Mg-Gr-Nb-ilmenite Mg-Cr-spinel Mg-tephroite Mg-titanomagnetite...Mg-titanomagnetite Na-Ca-enstatite • Nb-er-Mg-ilmenite Nb-Cr-rutile Nickel-mackinawite Palladic platinum Pd-electrum...Ayalon, Israel (Gross et al., 1967) and Zeilbergs, northern Bavaria, Germany (Pollmann, 1991 ). Etymology: |
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| 264 Map of Liberia. 271 Map of Sierra Leone . 273 The Star of Sierra Leone (Color Plate). 277 M. G. Bardet...A.R.S.M., one-time Assistant Director of the Sierra Leone Geological Survey and Geological Adviser to...River, some 9 miles south of Messina, near the northern border of South Africa. Its age was determined...one time grown in such non-tropical places as northern France, southern England and even Greenland in... connected to Gondwanaland, extended into the northern hemisphere from tropical climes. This other half |
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| The Lead-Zinc-Vanadium Deposits at Broken Hill, Northern Rhodesia. By James H. Taylor, Ph.D., M.I.M.M....• 407 COLONIAL GEOLOGICAL ABSTRACTS Part 5.-Northern Rhodesia . • • BOOK REVIEWS Geochemistry...The Lead-Zinc-Vanadium Deposits at Broken Hill, Northern Rhodesia Plate I Photomicrographs of Rocks from... THE LEAD-ZINC-VANADIUM DEPOSITS AT BROKEN HILL, NORTHERN RHODESIA By JAMES H. TAYLOR, Ph.D., M.I.M.M. Professorof...the more usual hemimorphite. Introduction in Northern Rhodesia lies about 70 miles N by E of the capital |
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| it to be innocuous. COFFEE FROM l\1AURITIUS, SIERRA LEONE AND SUDAN J. l\1AURITIUS SMALL areas of coffee...Institute in May 1928. 1 • COFFEE FROM MAURITIUS, SIERRA LEONE, SUDAN 419 The sample consisted of ungraded...export trade. II. SIERRA LEONE At one time the production of coffee in Sierra Leone was of some importance...the Kessewe Hills, near Y onnibanna in the Northern Province. At lower altitudes, at the foot of the Colony...many years in the eastern part of the Southern Province. According to Pamphlet No. 11, issued by tl1e |
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| Rwanda São Thomé & Príncipe Senegal Seychelles Sierra Leone Socotra (Yemen) Somalia South Africa Sudan Swaziland...platinum-group metals (PGM), titanium minerals (rutile and ilmenite), vanadium, vermiculite and zirconium (Coakley...Liberia, Nigeria, Rwanda, São Tomé and Principe, Sierra Leone, Somalia, Sudan, Uganda and Zimbabwe. Negative...the southern part of the Kenya Colony and the northern part of former German East Africa (from Gregory...mapped the rift grabens of southern Kenya and northern Tanzania. Notably is a detailed geological map |
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| MOLYBDENITE TANTALITE AMBL YGONITE COLUMBITE RUTILE ILMENITE AND BERYL ZIRCON OTHER MINERALS • BUYERS OF...Bumbuna, Sierra Leone. By Vladi Marmo, Dr. Ph. (Helsinki), GeologicalSurveyDepartment, Sierra Leone . . ...SURVErs Kenya • • • • • • • Uganda • • • • • • • Northern Rhodesia • • • • • Nyasaland • • • • • • • Bechuanaland...an Elliptic D,:ainageSystem North of Bumbuna, Sierra Leone Plate I Panoramic View of Area North of Bumbuna...Upper Cretaceous mollusc fauna collected from the Northern and Eastern Regions of Nigeria. A paper on the |
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| Jamaica_____________________________________ 44 46 6. Northern South America_______________________ 7. Central...the Caribbean Islands and from countries in the northern part of South America. Potential sources of aluminum...large resources of saprolite occur in the Piedmont province of the Southeastern States. Saprolite is associated...the highalumina clays of western Washington and northern Idaho and the discussion of the Cowlitz and King...enclosed by sedimentary rocks in Arkansas (fig. 2C), northern South America, Urals region of the U.S.S.R., mainland |
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| MOLYBDENITE TANTALITE AMBL YGONITE COLUMBITE RUTILE ILMENITE BERYL ZIRCON AND OTHER MINERALS BUYERS OF.... Uganda • Tanganyika . • • • • • • Northern Rhodesia • • • . 44 • • • • • • 59...• 76 Cyprus • Nigeria • Gold Coast . Sierra Leone Federation • of Malaya • • • • • • ...of £5 millio11 and £1 million respectively. In Northern Rhodesia, production increased by 1 • 2 EDITORIAL...exported in-creased although the tonnage fell; Sierra Leone (£0·8 million), because of larger iron-ore shipments |
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| TANTALITE ·AMBL YGONITE COLUMBITE RUTILE ILMENITE AND BERYL ZIRCON OTHER MINERALS • , BUYERS...• • • • 59 • • • • • • • • • • Northern Rhodesia Nyasaland • • Somaliland • • •...in Borneo • • • • • • • 72 Cyprus Sierra Leone Federation of Malaya • • • • • • • ...Thorium . • • • 89 Mineral Production in Northern Rhodesia • • • • 90 • • • 91 • 91 ...that benefited Northern Rhodesia and Cyprus in particular. The 1954 production of Northern Rhodesia exceeded |
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| Countries United Kingdom Ghana Kenya Malawi Rhodesia Sierra Leone Tanzania Uganda Zambia Canada India Australia...Haematite Fe,O, Pyrites FeS, Sphene(Titanite) CaTiSiO, Ilmenite FeTiO, Zircon Zr,SiO, Eudialyte (Eucolite) (Na...mining necessary at the Stjernéya occurrence in northern Norway. Mining operations in both Canada and Norway...known source of processed nephelinesyenite is in northern Norway where production began in 1961 and has...acceptance of Ontario nepheline-syenite by the northern States east of the Mississippi while its successful |
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| MOLYBDENITE TANTALITE AMBLYGONITE COLUMBITE RUTILE ILMENITE AND BERYL ZIRCON OTHER MINERALS • BUYERS...Geochronology, • 1956 • • M-ineral Production in Northern Rhodesia in 1956 • • • • • . • • • 72...The Chromiferous Ultrabasic Rocks of Eastern Sierra Leone '', by Professor K. C. Dunham, F.R.S., and others...rock. For example, if quartz were coded 1-2-4 and ilmenite 5-7-12, and if a particular specimen contained...the printer: The El Wak-Aus Mandula area, Northern Province. The Gwasi area, east of Lake Victoria. The |
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| Diamonds and eclogites of the Jericho kimberlite (Northern Canada) Andrea De Stefano Æ M. G. Kopylova Æ P...eclogite xenoliths from the Jericho kimberlite (Northern Slave craton). The majority of the diamonds are...eclogite xenoliths of the Jericho kimberlite (Northern Slave craton) stand out, as they are unusually...parental rocks for diamonds in the mantle below the northern part of the Slave craton. We show that the vast...deformed peridotite, megacrystalline websterite and ilmenite–garnet wehrlite (Kopylova et al. 1999b). The xenoliths |
