 | | 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) | | gemmy, intense purple apatites from this pegmatite mine have made Pulsifer the premier locality for fluorapatite...” 5.6 cm tall, Alchori, Shigar Valley, Skardu district, GilgitBaltistan, Pakistan. Private collection...syenite pegmatites in the Imilchil area, High Altas Mountains, Morocco (Jahn et al. 2003); the Alpine clefts...Swan Hill Rural City, Victoria Aberfoyle mine, Rossarden district, Tasmania Complex metamorphosed sedimentary...Norte and Paraíba: e.g., Sapo mine, Ferruginha; Golconda district, Governador Valadares; Linópolis |  | | 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...gemstones (such as axinite, dravite, fluorapatite, prehnite and tremolite). The δ18O values of tanzanite,... tremolite, tsavorite and kyanite from the Merelani area are all high (average of 19.1, 19.5, 18.5 and...Graphite-free garnet-bearing gneisses from the Telele Hills, ~33 km south of the mining area, have much lower |  | | Journal (issue) | | page X) In this issue … Mineral of the month: Prehnite .......... p. 4 April program details .......... Bank manager finds diamond.............. p. Prehnite From Southbury, Connecticut Bench Tip: Depth... Mineral of the Month Happy Easter! Prehnite by Sue Marcus Prehnite is our Mineral of the Month for April...it when we return to field collecting. Although prehnite is relatively common, we will learn some little-known...No in-person social events for now! The first prehnite to be described as a mineral came from South Africa |  | | Journal (issue) | | James E. Shigley Andy Lucas Donna Beaton Stuart D. Overlin Nathan Renfro Elise A. Skalwold John I....etching, in quartz crystals from India’s Jalgaon District. NOTES AND NEW TECHNIQUES 82 Characteristics...Montana sapphire production • Magnesio-axinite from Tanzania • Sustainable vertical integration in sapphires...Robert Weldon survey Brazil’s diamond deposits. This region has produced a significant number of large rough...Omi regions of Niigata Prefecture and the Wakasa region of Tottori Prefecture and compares them with samples |  | | 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) | | deformed blocks to those with minimal deformation of block and matrix. Photo, cropped differently for front.... . . . 1 John W. Shervais, Sung Hi Choi, Warren D. Sharp, Jeffrey Ross, Marchell Zoglman-Schuman, and...75 R. Myhill 4. Role of plutonic and metamorphic block exhumation in a forearc ophiolite mélange belt:... . . . . . . 171 Rolfe Erickson 8. Sedimentary block-in-matrix fabric affected by tectonic shear, Miocene...the current volume. Given the three-dimensional (3-D) complexity of mélanges, it is of little surprise |  | | Journal (article/letter/editorial) | | clinopyroxene. Continuing metasomatism garnetized prehnite and generated secondary amphibole and pyroxene...pod consisted of a highly j ointed and fractured block in contact with a more massive segment. The contacts...serpentinite irregularly bounded the pod. Locality D proved to be a highly metasomatized gabbro; locality...contain garnet. 46 T . M . LEACH AND K. A. R O D G E R S L•Is " I ~ ~ ~ ','~' ' , ~ I'.'1\ 9...grey~'cTcke&~cx3illite MESOZOIC i 11111 B ~ "9149 f d,~4i~ 6 . ~1~X~234 ..... } " |  | | 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, |  | | 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 |  | | Report (volume) | | contributors to this volume were James W. Clarke, Georgianna D. Conant, Howard R. Cramer, Bettie S. Hackman, Elizabeth...Geophys. Union Geophys. Mon. Monograph. Washington, D. C. Am. Jour. Botany Baltimore, Md. American Geophysical...Mineralogist - American Mineralogist. Washington, D. C. University of Notre Dame. Mineralogical Society...America. Montreal, Quebec, Canada, and Washington, D. C. Arctic and Alpine Research- Arctic and Alpine...Paper. Montreal, Quebec, Canada, and Washington, D. C. Arctic lnst. North America Tech. Paper- Arctic |  | | Report (volume) | | MURTON,B. J. Introduction ALEXANDER,R. J. & HARPER,G. D. The Josephine ophiolite: and ancient analogue for...intermediate-spreading oceanic ridges 3 MACLEOD, C. J. & ROTHERY, D. A. Ridge axial segmentation in the Oman ophiolite:...tectonic setting of ophiolites 117 KOSTOPOVLOS, D. K. & MtJRTON, B. J. Origin and distribution of components...MURTON,B. J. Introduction ALEXANDER,R. J. & HARPER,G. D. The Josephine ophiolite: and ancient analogue for...intermediate-spreading oceanic ridges 3 MACLEOD, C. J. & ROTHERY, D. A. Ridge axial segmentation in the Oman ophiolite: |  | | 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 |  | | 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 |  | | Journal (article/letter/editorial) | | Shetland ophiolite DEREK FLINN, 1 J. A. MILLER 2 and D. RODDOM 2 department of Earth Sciences, University...type are generally considered to have been formed by d y n a m o t h e r m a l m e t a m o r p h i s m of...causing the m e t a m o r p h i s m . H o r n b l e n d e separated from the sample of high-grade schist gave...equivalent dates obtained for the N e w f o u n d l a n d and northern Quebec ophiolites but about the same...Ballantrae ophiolites, all of which belong to the C a l e d o n i a n N o r t h e r n Appalachian orogenic belt |  | | Report (issue) | | sciences. Published separately as Chapters A, B, C, and D UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON:...year the volume consists of 4 chapters (A through D) of Professional Paper 501. Chapter A contains a summary...A277. The tables of contents for chapters B through D are listed on pages A271-A275. Next year, the sixth...A and for critical review of papers in chapters B-D. He was assisted by George Phair, who was largely...Detergents and pesticides in water supplies ___ _ Acid mine waters __________________________ _ Indus trial |  | | 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 |  | | Book | | Considered—Ores and Minerals Considered Economically— Mine Sampling and Ore Valuation—The Examination and Valuation...Object in Land and JAMES of Cloth. SURVEYING Mine PARK, Fully AND Surveying. | | | | | | | |...Meridian, Latitude, and Time—Levelling Railway Curves—Mine Surveying.—IN DEX. Ly. book which should prove as... Post-Pliocene Fossils Paleolithic Implements Hills carved from Cretaceous Beds . Representation of...up so as to form mountain-chains or isolated mountains that frequently attain a great height. Alteration |  | | Book | | 73 The Fennoscandian Shield 5 The Skellefte District . . . . . . . . . . . . . . . . . . . . . . ....for Exploration—The Kupferschiefer in The Lubin Region, Poland . . . . . . . . . . . P. Mejia, J.J. Royer...and D. Ballas 299 1 Introduction Pär Weihed Abstract This book is the result of 3- and 4-D modelling...Europe addressed the issue of pan-European 3- and 4 D geological models as a basis for mineral exploration...visualizing the geological evolution of the district. 3-D predictivity maps are also presented using some |  | | Report (volume) | | Burinn. Uy K. UMB.Si*. (Mnnoh.), AHHiniant Su}M*rmto«d<‘«t, .Survoy «£ India . . * . m 4U 412 4ir» 41«-"430...from 15tli September 1921. Asf'iblanl Supprintf»d...field work in Assam on 3(Jth April 1921. J)ei>ut<‘d to investigate the gas seepages of Baroda on 8th October...and left for the field on 13th November 1921. Mr. D. N. Wadxa . Appointed Assistant Superinfendent,...officers joined the Department dining the ye-nr:— Mr. D. N. Wadia, M.A., B.Sc., P.G.S., on Kith April 1921 |  | | Report (volume) | | Canada THE MINES HANDBOOK Meeting tbe Needs of Mine and Smelter Hundreds of plants on both American...(all types) Crushers Crushing Rolls NEW YORK Mine Pumps Oil Engines Sampling Machinery Screens Stamp...ENGINES, MINING AND SMELTING MACHINERY CTON JOHN D. RYAN, CHAIRMAN OF THE BOARD OF DIRECTORS OF THE...the iron mining companies of the Lake Superior district is given, and the many mining corporations of...all the metals, and a corresponding expansion of mine work. The MINES HANDBOOK will hereafter be published |  | | Report (volume) | | California. THE MINES HANDBOOK, 1922 MACHINERY FOR MINE • MILL SMELTER Embodying recent developments...Compressor NEW YORK Crushing Rolls Air Compressors Mine Pumps Ball Mills Blast Furnaces Oil Engines Screens...of Mines. Located in the Lake Superior Mining district. Mines and Mills accessible for college work....considered to be working the public and not the mine. Many suspicious promotions are however not positively...Street New York COPPER "C * Q" Electrolytic "P. D. Co." Casting ALPHABETICAL Note — Roman INDEX TO |  | | Journal (volume) | | Deposits—A Paleomagnetic Approach M. O. de Kock, D. A. D. Evans, J. Gutzmer, N. J. Beukes, and H. C. Dorland...deposit exploration within the Archean Abitibi district of Ontario and Quebec, Canada, as well as further...the CSIRO in roles including science adviser for mine processing. He previously advised companies such...significant iron ore discoveries in the Pilbara region of Western Australia. MICHIEL O. DE KOCK obtained...Karoo sedimentary basin of South Africa. DAVID A. D. EVANS is professor of geology and geophysics at Yale |  | | Journal (article/letter/editorial) | | (palaeomagnetic pole at 239°E, 7°N, 7 sites, dq~ = 7.6° , d× = 14.1°) includes one reversal of magnetisation and...group (pole at 222°E, 16°N, 24 sites, dq, = 4.8° , d× = 9.0 °) includes four reversals and two intermediate...preserved within a ENE-trending f a u l t - b o u n d e d block and subdivides into three members (M~j0t, Naujarssuit...Eriksfjord Formation, South Greenland Site No. N D I R K c~95 M2oo/M0 Curie point(s) _+10°C Thermomagnetic...530 555 535,630 515 510 515 550,670 570,670 D A B C D D D B (x) 216.2 150.0 147.7 152.2 154.7 150.4 285 |
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D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania