 | | Book | | GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published by Struik...resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties 21 A to...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...starting in what was then Tanganyika ( now mainland Tanzania) and then progressing to Kenya - I am proud to...countries are among the finest in the world. The region and its gems are particularly dear to my family |  | | Journal (article/letter/editorial) | | AND ASSOCIATED GEMSTONE MINERALIZATION AT MERELANI, TANZANIA C. HARRIS Department of Geological Sciences...to date, is the Merelani area of northeastern Tanzania, a structurally complex region consisting of granulite...and tremolite). The δ18O values of tanzanite, tremolite, tsavorite and kyanite from the Merelani area...Graphite-free garnet-bearing gneisses from the Telele Hills, ~33 km south of the mining area, have much lower...protolith. The average δD value of the tanzanite and tremolite is -77 and -27‰, respectively, which is consistent |  | | Journal (issue) | | GRQ:)/' President: H. Levy Vice-Presidents: D. J. Callaghan, A. T. Collins, N. W. Deeks, E. A. Jobbins...(Petershausen), Dr J. E. Shigley (Carlsbad), Prof. D. C. Smith (Paris), E. Stern (London), Dr M. Superchi...Gerais, Brazil, which has been the most productive mine since the 1980s. Growth of alexandrite by the HOC...purchased from the Tairus company in Bangkok by Dr D. Schwarz of Lucerne, Switzerland (Figure 7 a,b). ...as twinning are ruled out as a cause (Figure 12 c,d). At present, the formation mechanism of these inclusions |  | | Book | | (field of view 8 cm). Figure 1.3 An opencast iron ore mine (Postmasburg, South Africa). 7 microscopes, or...which are essentially spherical (figure 2.3A), and p, d and f orbitals (figure 2.3B, C), which are shaped...three equivalent orbitals occupied by electrons, the d as a set of five and the f as a set of seven orbitals...orbitals (A) (B) y x x y z z z The five d orbitals (D) (C) y x x y z Figure 2.3 The shapes and...and arrangement of the (A) s, (B) p and (C) d orbitals. The seven f orbitals are extremely complex and | | | Book | | about identifying a Figure 1.3 An opencast iron ore mine (Postmasburg, South Africa). microscopes, or chemically...three equivalent orbitals occupied by electrons, the d as a set of five and the fas a set of seven orbitals...nucleus but rather than follow predictable orbits d and f orbitals (figure 2.3B, C), which Figure 2.2...five d orbitals (©) (D) Figure 2.3 The shapes and arrangement of the (A) s, (B) p and (C) d orbitals...Orbitals interpenetrate each other, as illustrated in (D) by the s and p orbitals. ways and the spatial distribution |  | | Report (issue) | | Wyoming Casper Mountain Region. 3. Water, Underground Wyoming Casper Mountain Region. I. Burford, Arthur...Precambrian ..................................... Block diagrams of joint set maxima, Casper Mountain Precambrian...cover, is the northwest extension of the Laramie Mountains uplift. The area of the mountain has been topographically...Mountain, at the northernmost tip of the Laramie Mountains in south-central Wyoming, is composed of a Precambrian...identified the mineral pseudoixiolite from a pegmatite mine by using X-ray powder patterns and rnicroprobe analyses |  | Chmielowski, Riia M., Jansson, Nils, Persson, Mac Fjellerad, Fagerström, Pia (2016) 3D modelling of hydrothermal alteration associated with VHMS deposits in the Kristineberg area, Skellefte district, northern Sweden. Mineralium Deposita, 51 (1) 113-130 doi:10.1007/s00126-014-0572-x | Journal (article/letter/editorial) | | VHMS deposits in the Kristineberg area, Skellefte district, northern Sweden Riia M. Chmielowski & Nils Jansson...Kristineberg area in the 1.9 Ga Skellefte mining district in northern Sweden, using six calculated alteration...stratigraphically highest VHMS are hosted by rocks rich in tremolite, talc, chlorite and dolomite with lesser clinozoisite...deposits . Mass change . Kristineberg . Skellefte district Introduction One of the key features of volcanic-hosted...setting of the long-producing Skellefte mining district in northern Sweden has recently been developed |  | | Journal (issue) | | an almost monomineralic rock, occurring as a tremolite-amphibole type, nephrite (or nephrite jade) or...amphibole of the tremolite-actinolite series, with the highest quality types close to tremolite [Ca2(Mg,Fe)5...development of an interwoven ‘felted’ fabric of the tremolite crystals. This toughness can vary slightly with...(British Omineca Columbia) Vitim East Sayan Mountains Lillooet (California) CHINA Nanjiang Luchuan...Nelson North Westland South Westland Livingstone Mountains NEW ZEALAND Wakatipu Figure 1: Nephrite jade |  | Li, Liang, Sun, Fengyue, Liu, Huiwen, Tan, Shucheng, Yu, Lu, Wang, Fei, Shen, Dali, Wang, Xueping, Wang, Yonggang (2020) Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism. Minerals, 10 (10) 837 doi:10.3390/min10100837 | Journal (article/letter/editorial) | | Orogenic Belt (NQOB). It is located in the Altun region of the northwestern margin of Qaidam Basin and...Cu-Ni ore was found at depth in the No. II ore block, with an average grade of 0.56% and a maximum of...Qaidam Massif and the southern slope of the Altun Mountains, and is also the intersection of the Altun Orogenic...biotite plagiogneiss, amphibolite gneiss, and tremolite marble [11]. The Quaternary sediments are mainly...sericite-quartz schist, muscovite-bearing quartzite, and tremolite-bearing marble. The Altun south margin fault, |  | Santosh, M., Yang, Qiong-Yan, Shaji, E., Mohan, M. Ram, Tsunogae, T., Satyanarayanan, M. (2016) Oldest rocks from Peninsular India: Evidence for Hadean to Neoarchean crustal evolution. Gondwana Research, 29 (1) 105-135 doi:10.1016/j.gr.2014.11.003 | Journal (article/letter/editorial) | | Campus, TE Trivandrum, 695 581, India University D 2 4 AC CE P CSIR-National Geophysical Research...understand the early Earth fringe of the Coorg Block, one of the oldest crustal blocks in Peninsular...that the igneous suite formed from subduction- TE D related arc magmatism, and that the sedimentary suite...rocks accreted along the margins of the Coorg Block show multiple zircon population with mean 207 ...during Eoarchean, Mesoarchean and Neoarchean TE D building the continental nuclei. The results contribute |  | | Journal (article/letter/editorial) | | MINERALIZATION AT YAKABINDIE, WESTERN AUSTRALIA A.J. N A L D R E T T * and A.R. T U R N E R CSIRO, Perth, W.A...magnesian liquid, it is postulated that the source region of the mantle must have been melted twice, once...vicinity of Kalgoorlie in the Eastern Goldfields region of Western Australia have been well documented...ultramafic flows similar to those in the Kalgoorlie region. The subsequent discovery of the Perseverence ore...Australia (Fig.l) forms the eastern half of the Yilgarn block which is itselfthe largest area of Archean rocks |  | Le Vaillant, M., Barnes, S. J., Fiorentini, M. L., Miller, J., McCuaig, T. C., Muccilli, P. (2015) A Hydrothermal Ni-As-PGE Geochemical Halo Around the Miitel Komatiite-Hosted Nickel Sulfide Deposit, Yilgarn Craton, Western Australia. Economic Geology, 110 (2) 505-530 doi:10.2113/econgeo.110.2.505 | Journal (article/letter/editorial) | | used as a case study to investigate the nature and 3-D geometry of the geochemical halo created by the remobilization...electromagnetic techniques. The distance of detection (d) for downhole electromagnetism (DHEM), which is the...metamorphic conditions of the Widgiemooltha dome region are estimated by Archibald et al. (1978) to be...YILGARN CRATON, WESTERN AUSTRALIA N Mt Edwards mine Widgiemooltha 50 km Narryer 26° Kurnalpi Burtville...Mariners tha ool me Do iem dg Wi Wannaway mine Domain boundary Terrane boundary Fault system Hootanui |  | | Other Paper | | time Transfer of concession Botswana Namibia Tanzania Mauritania Subject to updating Within 4 weeks...Munali Lumwana Project name Feasibility Study Mine construction Stage Exploration Exploration West...6 years - Average of 122Kt Cu/year over 37-year mine life. Appendix II-5 (1) Mineral Development and...the Mufulira Syncline at the well-known Mufulira Mine - Drilling for confirmation of reserves and other...Stage Surrounding the Exploration Buwana Mkubwa mine 15km from Mufulira, Copperbelt Location - Until |  | | Report (volume) | | contributors to this volume were James W. Clarke, Georgianna D. Conant, Howard R. Cramer, Bettie S. Hackman, Virginia...Monograph Series. Washington, D. C. Am. Geophys. Union Trans. Washington, D. C. Am. Jour. Botany Baltimore...Mineralogist - American Mineralogist. Washington, D. C. University of Notre Dame. Mineralogical Society...North America. Montreal, Quebec, Canada; Washington, D. C. Arctic Inst. North America Tech. Paper Paper....Asociacion Mexicana de Geof(sicos de Exploracion. Mexico, D. F., Mexico. Asoc. Mexicana Geologos Petroleros Bol |  | | Book | | . . . . 4.1.2 Polymetallic Veins in the Ore Mountains . . . . . . . . . . . 4.2 Orogenic Gold Veins... Research trips led him to Oldoinyo Lengai in Tanzania, through the High Atlas in Morocco, and to the...East African carbonatites led him to Uganda and Tanzania. He works at CRB Analyse Service GmbH in Hardegsen...is the minimum grade at which it is worthwhile to mine a certain deposit. Everything below it (low-grade...chalcopyrite (brass) from the Friedrich-Christian Mine in Wildschapbach, Black Forest (Germany) (photo |  | | Report (volume) | | Washington, D. C. 20242. The principal contributors to this volume were James W. Clarke, Georgianna D. Conant...Mon. Monograph. Washington, D. C. Am. Geophys. Union Trans. Washington, D. C. Am. Jour. Botany Baltimore...Mineralogist - American Mineralogist. Washington, D. C. University of Notre Dame. Mineralogical Society...America. Montreal, Quebec, Canada, and Washington, D. C. Arctic Anthropology- Arctic Anthropology. University...Paper. Montreal, Quebec, Canada, and Washington, D. C. IX BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, |  | | Journal (article/letter/editorial) | | JuanComplex,Kambalda,WesternAustralia R. J. MARSTONAND B. D. KAY Abstract Massive and disseminatedFe-Ni-Cu ores...shootin Barrett et al. (1977) and an aceasternYilgarn Block. The mineralizedarea within count of unusually Ni-rich...The highly magnickel productionof the Otter-Juan mine. nesian (commonlymore than 38 wt percentMgO, The...31020' McMAHO• DEEPS vvvvvvvvv ß .• KAMBALDA REGION VVVVVVVVVVV ß ß vvvvvvvvvvvvl . vvvvvvGIBBSSHOO1...of the luancomplex. 548 R. J. MARSTON AND B. D. KAY UA ULTRAMAFIC ES SEQUENCE North • Dipping |  | | Report (volume) | | contributors to this volume were James W. Clarke, Georgianna D. Conant, Howard R. Cramer, Bettie S. Hackman, Virginia...S. 04470 04358 Acker, Louis L.; Hatcher, Robert D., Jr. Relationships between structure and topography...deposit- Discussion [of paper by L. G. Soderman andY. D. Kim, 1970]: Canadian Geotech. Jour., v. 7, no. 2...illus., 1970. Adams, John A. S. See Baldwin, Otha D. 00482 Adams, John A. S. See Hartung, Jack B. 06393...Adams, SamuelS. Ore controls, Carlsbad potash district, southeast New Mexico, in Third symposium on salt |  | Kogel, Jessica Elzea, Trivedi, Nikhil C., Barker, James M., Krukowski, Stanley T. - Eds. (2006) Industrial Minerals and Rocks (7th ed.) Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO. | Book (edition) | | . . . . . . . . . . . . . . . . . . . . . . . . Mine Safety and Health Law . . . . . . . . . . . . ....which th e in dustry o perates. At t he sam e ti me, d evelopment of new technologies and globalization of...transportation, and end use. Growing emp hasis on sustai nable d evelopment and increasing concer ns fo r th e environment...served as president of Western Mineral Associates. D reyer retired in 1984. Dr. Dreyer was a former chair...Garnet Services, Inc. Kirkland, Washington James D. Hansink Montana Bureau of Mines and Geology Montana |  | | Report (issue) | | c al S o c ie ty of Ame r i c a , as s o c iat e d s o c i e ti e s m e eting on the c ampus c oncu r...r r ently . The Unive r s ity i s pl e a s e d to mak� i t s fac ilitie s availabl e fo r the s e me...b e c om e acquaint e d with the wo rk b e ing done . The C oll e g e of Mine s i s out standing fo r...r imentation, and r e s ea r c h in g eology and mine ralogy and in mining and metallurg ic al engin e...with the Arizona B u r eau of Mine s and the United State s B u r eau of Mine s , both of which have offic |  | | Report (edition) | | Corries’ towards Aonach Beag (1234 m), Glen Roy district, Lochaber. The frostshattered exposures in the...well-bedded Glencoe Quartzite (Lochaber Subgroup) (D 4196). log On one your bw badcy 10 of ove SUaVOA...FOURTH EDITION By D Stephenson, PhD and D Gould, PhD Contributors: G C Clark PhD D J Fettes PhD T P... JW Merritt BSc R M W Musson PhD W Mykura DSc J D Peacock PhD D1 Smith PhD LONDON HER MAJESTY'S STATIONERY...Councib, & Bibliographic reference STEPHENSON, D, and Goutp, D. © NERC copyright 1995 First published 1935 |  | Padrón-Navarta, José Alberto, Tommasi, Andréa, Garrido, Carlos J., Sánchez-Vizcaíno, Vicente López, Gómez-Pugnaire, María Teresa, Jabaloy, Antonio, Vauchez, Alain (2010) Fluid transfer into the wedge controlled by high-pressure hydrofracturing in the cold top-slab mantle. Earth and Planetary Science Letters, 297 (1) 271-286 doi:10.1016/j.epsl.2010.06.029 | Journal (article/letter/editorial) | | Carlos J. Garrido c, Vicente López Sánchez-Vizcaíno d, María Teresa Gómez-Pugnaire a,c, Antonio Jabaloy...& UGR, Facultad de Ciencias, 18002 Granada, Spain d Departamento de Geología, Universidad de Jaén (Unidad...aggregates of magnetite, and rare idiomorphic tremolite. Although very strong shape preferred orientations...the apparent maximum spinifex olivine elongation; (d) View of an outcrop where GSRZ affect a larger rock...between the two families of GSRZ orientation; (d) Block sketch summarizing the structural relations between |  | | Journal (article/letter/editorial) | | results from all classifications are plotted on block maps to indicate areas where different water types...part of the Portuguese Mainland and the Algarve region were covered. More recent work generally covers...are used for water consumption in the Alentejo Region most frequently. Not many medicinal springs are...extremely rich in all kinds of springs. The Furnas region was also described in Acciaiuoli (1952, 1953) and...several samples, noticeably from 2− the Furnas region in the Azores Island on São Miguel HCO− 3 or CO3 |  | Mondal, S. K., Baidya, T. K., Rao, K. N. G., Glascock, M. D. (2001) PGE and Ag mineralization in a breccia zone of the Precambrian Nuasahi ultramafic-mafic complex, Orissa, India. The Canadian Mineralogist, 39 (4) 979-996 doi:10.2113/gscanmin.39.4.979 | Journal (article/letter/editorial) | | GURURAJA RAO #1450, C/D Block, Kuvempunagar P.O., Mysore, Karnataka 570023, India MICHAEL D. GLASCOCK§ Research...gabbroic rock (gb) in hanging-wall of the Breccia Zone. (d) Fragments of banded ultramafic rock (um) within the... (b) clot-textured bands, (c) massive bands and (d) spotted chromitite bands. Both schlieren and spotted...by sulfides and silicates along the boundaries. (d) Coarser-grained chromite shows inclusions of chalcopyrite...pyrrhotite (po). Black material is clinochlore. (d) Chromite (cmt) extensively replaced by sulfides (po) |  | | Book (volume) | | Paleozoic and Mesozoic Sequences in the Kitakami Mountains (A05). 81 Kei Mori, Kazuyoshi Okami and Masayuki...Mesozoic Melanges and Associated Rocks in the Kanto Mountains (CIO). 115 Ken-ichiro Hisada, Hisayoshi Igo...Cretaceous radiolarian fossils are known in the Kabato Mountains (Nagata et al., 1986; Kondo, 1991) and am¬ monites...subduction along the southwestern margin of the Okhotsk block. The former involves Early Cretaceous granitic and...caused by subduction along the mar¬ gin of Okhotsk block involves a late Cretaceous to early Paleogene accretionary |
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D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania