 | | Journal (article/letter/editorial) | | African Craton are restricted to the Liberian age province (ca. 2.76 Ga) in the Leo uplift (Haggerty 1992)...All 16 inclusions from nine diamonds have low forsterite contents of about 92 (91.4±92.8 mol%; see Fig...(Table 2) have very high NiO (0.47 wt%) at low forsterite contents (91.8 mol%). Following Kelemen et al...applied. Despite almost identical Ni, Mn and forsterite contents of the olivines, the signi®cantly dierent...xenoliths from this area (Koidu kimberlite, Sierra Leone) and concluded that both were derived from a |  | | Book | | in this chapter with reference to the system forsterite-diopside-leucite-anorthite. Association of silica-deficient...detail with reference to the study of the systems forsterite-diopside-leucite-akermanite and diopside-nep...atmospheric pressure. Experimental study of the system forsterite-diopside-leucite and forsteriteakermanite-leucite...and Somma-Vesuvius of Italy and the Bufumbira province of equatorial Africa, K-rich silica undersaturated...can be understood from the study of the system forsterite-kalsilite-SiO2 in presence of excess water at |  | | Journal (issue) | | 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...1954. '' Erosion levels and laterite in Buganda Province, Uganda.,, C.R. 19e Sess. Congr.geol. internat |  | | Journal (volume) | | 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 |  | | Book | | with mining in the Karonge Complex, Bujumbura Province. Minerals such as monazite and bastnasite are...in central Rwanda. In Rusizi District, Western Province, gem-quality pink and green tourmaline has been...ore deposits, forming a so-called metallogenic province that contains the economic deposits (Dewaele etal...and Tulawaka, all of which are located in the northern region of the Dodoma (Archaean) craton's Lake...scattered occurrences are widespread in Kabale (Northern Region), Kisoro and Kanungu districts (Western |  | | Journal (article/letter/editorial) | | believed to be parental to the other rocks in the province principally through a mechanism of olivine fractionation...fraetionation has prevailed in the Svartenhuk province, permitting evolution from picritic material at...area showing the extent of the Tertiary basalt province K 2 0 / N % 0 + K 2 0 in the range 0.06--0.16...of Analyses Comparisons of analyses from this province with other areas have been restricted to the incompatible...from the data in Table 2 that each tholeiitie province has a unique assemblage of incompatibles, representing |  | | Report (issue) | | 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...Ayalon, Israel (Gross et al., 1967) and Zeilbergs, northern Bavaria, Germany (Pollmann, 1991 ). Etymology:...Dorst Fontein K 77, Kimberley district, Northern Cape Province (Parry and Wright, 1925). The mineralwas...mine, Farm Wessels 227, Hotazel district, Northern Cape Province (Von Bezing et al., 1991 ). The name was |  | | Journal (issue) | | . 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...the ocean floor. These now s11rround all but the northern portion of the island. The series consists of |  | | Journal (article/letter/editorial) | | divisible into two distinct provinces. A northern province includes all the Rhodesian basalt Iocalities...abnormally high for tholeiitic rocks. The southern province includes the basalts of Basutoland and Swaziland...of crystallisation. The rocks of the southern province are relatively aluminous, and plagioclase appears...aluminous northern province, pyroxene appears earlier than plagioclase. Within the northern province, three...textural features of the rocks. Within the northern province itself it is also possibleto find an GEOCHEMISTRY |  | STRIPP, G. R., FIELD, M., SCHUMACHER, J. C., SPARKS, R. S. J., CRESSEY, G. (2006) Post-emplacement serpentinization and related hydrothermal metamorphism in a kimberlite from Venetia, South Africa. Journal of Metamorphic Geology, 24 (6) 515-534 doi:10.1111/j.1525-1314.2006.00652.x | Journal (article/letter/editorial) | | the Central Zone of the Limpopo Belt, Limpopo Province, South Africa (Fig. 1). The pipes were formed...silica contents of fluids that can coexist with forsterite. 528 G. R. STRIPP ET AL. Table 3. Typical...contents of water-rich fluids that coexist with forsterite can vary within the bounds of silica contents...and III; track II is an arbitrary example of forsterite that coexists with a fluid with a specific silica...that lizardite is a stable reaction product of forsterite breakdown means that tracks V and VI buffer the |  | Dublet, Gabrielle, Juillot, Farid, Brest, Jessica, Noël, Vincent, Fritsch, Emmanuel, Proux, Olivier, Olivi, Luca, Ploquin, Florian, Morin, Guillaume (2017) Vertical changes of the Co and Mn speciation along a lateritic regolith developed on peridotites (New Caledonia) Geochimica et Cosmochimica Acta, 217. 1-15 doi:10.1016/j.gca.2017.07.010 | Journal (article/letter/editorial) | | capped by an iron pan in the Goro region (Southern Province; Figure 1). A previous study by Dublet et al....studied by our group in the Koniambo klippe (Northern Province) (Fandeur, 2009; Dublet et al., 2012; 2015)... Mn-bearing phyllosilicates and Co- or Mn-bearing forsterite. These model compounds were chosen based on the...Briefly, the bedrock mainly consists of olivine (forsterite), pyroxene (enstatite) and serpentine that are...along another lateritic regolith in the Northern Province of New Caledonia (Y5 core drilled at the Koniambo; |  | | Journal (article/letter/editorial) | | decreases in olivine inclusions with increasing forsterite content, which we interpret as reflecting a depletion...from Venetia were analysed. VE 163 contained a forsterite-rich olivine (Fo94) with 0.54 ppm Li typical...G 103, lithium correlates negatively with the forsterite content in olivine. The latter is an indication...(see trend in Fig. 5). The relationship between forsterite in olivine and the percentage of melt extraction...in Fig. 5, a diagram of Li in olivine versus forsterite content. While Li steadily decreases with increasing |  | | Journal (article/letter/editorial) | | graphite disk (99.99% purity), K2CO3, KCl, synthetic forsterite with a purity not less than 99.9% and distilled...(7.5 GPa; 1500 °C; 15 h); c) prints of joint forsterite-diamond growth on diamond seed crystals (Mg2SiO4–10%;...Mg2SiO4–K2CO3–C, shown in Table 1, the stable phases were forsterite, carbonate melt and graphite (± diamond). The...− − − − − − 13 81 52 100 86 capsule with 10% forsterite, diamond synthesis with α = 66% was established...graphite and carbonate–silicate melt. Also joint forsterite–diamond growth was determined (Fig. 4c). No metastable |  | Sobolev, Nikolai V., Logvinova, Alla M., Zedgenizov, Dmitry A., Pokhilenko, Nikolai P., Kuzmin, Dmitry V., Sobolev, Alexander (2008) Olivine inclusions in Siberian diamonds: high-precision approach to minor elements. European Journal of Mineralogy, 20 (3) 305-315 doi:10.1127/0935-1221/2008/0020-1829 | Journal (article/letter/editorial) | | microdiamonds only. They contain relatively low forsterite (Fo) [100 Mg/(Mg+Fe)] along with very low MnO...unaltered kimberlite are also characterized by high forsterite contents, which makes a clear difference between...and Ni (c) contents are presented in ppm vs. forsterite (Fo) content in mol %. Fig. 4. Compositions...have concluded that generally lowerthan-average forsterite content in olivines included in diamonds from...geochemistry of diamonds from pipe 50, Liaoning Province, People’s Republic of China. Proc. Fifth Intern |  | | Journal (article/letter/editorial) | | Carbonate Tuff Cones in Northern Tanganyika By J. B. DAWSON (PLATES VI-VII) ABSTRACT The carbonate...rings and cones in the Monduli-Arusha area of northern Tanganyika, is believed to be of volcanic carbonatitic...pipes. INTRODUCTION THE Neogene volcanic rocks of northern Tanganyika are divided into two groups, the Older...the tuff ring is relatively small, whilst on the northern and southern rims the deposition has been almost...carbonate tuffs have also been described from Northern Rhodesia (Bailey, 1960) and have, in historic |  | Fandeur, D., Juillot, F., Morin, G., Olivi, L., Cognigni, A., Ambrosi, J.-P., Guyot, F., Fritsch, E. (2009) Synchrotron-based speciation of chromium in an Oxisol from New Caledonia: Importance of secondary Fe-oxyhydroxides. American Mineralogist, 94 (5) 710-719 doi:10.2138/am.2009.3073 | Journal (article/letter/editorial) | | chromium in the bedrock sample are the silicates forsterite, enstatite, and lizardite. Hosting of chromium...(West side of the Grande Terre island in the Northern Province), on the eastern side of the Pandanus watershed...polished thin sections indicate that olivine is forsterite [(Mg1.79Fe0.17Ni0.01)Si1.01O4], pyroxene is enstatite...the primary silicate minerals in the bedrock (forsterite, enstatite, and lizrardite) were strongly leached...160 cm, and (d) bedrock]. L = Lizardite, F = Forsterite, E dark hematitic areas (Hm), and small opaque |  | | Journal (issue) | | 108 Sapphire and Garnet from Kalalani, Tanga Province, Tanzania Antonin V. Seifert and Jaroslav Hyrsl...should be the Helam mine near Swartsruggens, and Sierra Leone is better described as being in West Africa...107 SAPPHIRE AND GARNET FROM K ALALANI, TANGA PROVINCE, TANZANIA By Antonin V. Seifert and Jaroslav Hyrsl...fluorescence (EDXRF) spectrometry, using a Tracor-Northern Spectrace TN 5000 instrument. Semi-quantitative...Velayo P RUSSIA Chernogolovka, Noginsk, Moscow Province: Vadim I. Vilado Bispo, Algarve: Johanne Cardin |  | | Journal (issue) | | Occurrence of Carbonatite in the Isoka District of Northern Rhodesia. By W. H. Reeve, M.Sc., F.G.S., Director...Director,GeologicalSuruey Departmmt, Northern Rhodesia,and T. Deans, lvf.A., F.G.S., Mi11eral ResourcesDivision...lsoka District of Northern Rhodesia Plates I to IV Views of Nkumbwa Hill, Northern Rhodesia Text-fig...Miocene age. The dips of the White Limestone on the northern and southern flanks of the anticline are generally...the Apostles Battery, in a SSW direction, to the northern end of the Great Salt Pond, a distance of about |  | | Journal (article/letter/editorial) | | composition Line Florencite-(Ce) Fluocerite Fluorite Forsterite Fourmarierite Fowlerite Fraipontite Francevillite...were found in the Saranovskoye chromite deposit, northern Urals, Russia (Spiridonov et al., 2006) (Fig....disseminated, stockwork-like and massive sulphides in northern Manitoba, Canada, are associated with peridotitic...Chételat (1947). of the garnierites of the Uralian province are of hypogene rather supergene origin (chrysotile...hydrothermal processes. Coronation Hill in the Northern Territory, Australia, is located in an unconformity-style | | | Journal (article/letter/editorial) | | composition Line Florencite-(Ce) Fluocerite Fluorite Forsterite Fourmarierite Fowlerite Fraipontite Francevillite...were found in the Saranovskoye chromite deposit, northern Urals, Russia (Spiridonov et al., 2006) (Fig....disseminated, stockwork-like and massive sulphides in northern Manitoba, Canada, are associated with peridotitic...Chételat (1947). of the garnierites of the Uralian province are of hypogene rather supergene origin (chrysotile...hydrothermal processes. Coronation Hill in the Northern Territory, Australia, is located in an unconformity-style |  | | Book (edition) | | wall-rock alterations brand the area as an alkalic province. The types of carbonatite occurrences may be grouped...Ontario; Ngualla and Mbeya, Tanganyika, and Nkombwa, Northern Rhodesia. II. Associated with alkalic complexes...carbonatite (concordant) in the Feira district, Northern Rhodesia. 2. Swarms of carbonatite dikes or sills...Larsen (1940) has pointed out, a petrographic province must be defined not only with respect to space...assignment of some occurrences to a particular province rests on geographic, geologic, or petrologic affinities |  | | Book | | flabelliformis), which is especially abundant in the northern parts of the Island. The Palmyra Olas are narrower...are extensive native plantations in the Northern Province, especially in the Jaffna Peninsula and the...November and December, the rainy season of the Northern Province. Sugar or “jaggery ” is prepared from sweet...stone inthe Western Province, or of tamarind wood in the North-Central Province; in this a heavy pesile...excavations at Anuradhapura and the North-Central Province (Sessional Papers, 1892). In the large glass shade |  | | Book (edition) | | internal reflections); Madenköy Mine, Çayeli, Rize Province, Black Sea Region, Turkey (sample: Halbach); XPL...grey; arg); Monte Narba Mine, San Vito, Cagliari Province, Sardinia, Italy; PPL B Same sample as above:...(West Wits Line), Witwatersrand field, Gauteng Province, South Africa; PPL B Intergrowth of electrum (yellowish...Bleida, Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco (sample: Goldmann/Oberthür);...(Ovifak), Qeqertarsuaq Island (Disko Island), Kitaa Province (West Greenland), Greenland (sample: Kenkmann); |  | | Book | | discovered kimberlites of the Siberian kimberlite province. 9 K - rich clinopyroxenes as mantle conveyers...and kamafugites from the Alto Paranaiba Igneous Province, Minas Gerais, Brazil: Preliminary studies. 26...Discovery and Geology of the Timber Creek Kimberlites, Northern Territory, Australia. Source Characteristics of...Facies Kimberlite Bodies of the Fort £ la Come Province, Saskatchewan, Canada. 103 Kimberlites, accelerated...Mantle Formation The Buffalo Hills Kimberlite Province, North-central Alberta, Canada. Eclogitic, Peridotitic |  | | Journal (issue) | | Bankers to the Governments of Southern Rhodesia, Northern Rhodesia, Nyasaland and Tanganyika. CAPITAL AUTHORISED...appended summary reports on Nigeria, Gold Coast, Sierra Leone, Uganda, Kenya, Tanganyilra, Nyasaland, Bechuanaland...steam holes are found in some localities. The northern islands are composed of stratified tuff, thought...from the Savanne Mountains in the south to the northern limits of Moka over a distance of about 20 miles...plains of variable width stretch to the sea. The northern part of the island is cut off fr·om the rest by |
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