 | | Book | | Phase 5. Sample Treatment D) World Production E) South African Diamond Occurrences 1. Large Kimberlite...Koffiefontein 2. Smaller mineralised kimberlites in South Africa 2.1 The Oaks 2.2 The Zebediela Kimberlites 2...and Virginia 2.6 The Loxtondal Cluster 2.7 Jagersfontein 2.8 Lace and Voorspoed 3. Alluvial Deposits... their relative production contributions in South Africa were, primary (kimberlite) 8.63 million carats...Premier mine. The proportion of gems in the West Coast marine deposits is over 98%. The MIBA mine in the |  | | Book (volume) | | DIAMOND-BEARING ALLUVIAL GRAVELS OF THE UNION OF SOUTH AFRICA DIAMOND-BEARING GRAVELS DRAINAGE WEATHERING...SYSTEMS THE ORIGIN OF THE ALLUVIAL DIAMONDS THE SOUTH-WEST AFRICA DIAMOND DEPOSITS THE VAAL RIVER ALLUVIAL GRAVELS...Plate No. 96. THIN SECTION (359, X 12) FONTEIN MINE BRONZITE PERIDOTITE FROM JAGERS facing page 368...following plate MINE THIN SECTION (8, x 12) BRONZITE PERIDOTITE FROM BuLTFONTEIN 98. MINE ,, ,, 99. THIN...THIN SECTION MINE - (3, X 12) BRONZITE PERIDOTITE FROM BOLTFONTEIN 102. THIN SECTION (176, X 12) ENSTATITE |  | | Journal (issue) | | City cuts right through the middle of the Mining District. (Continued on page 2) The Moravian Territorial...Chlorargyrite, on and impregnating Sandstone, Silver Reef District, Washington Co., UT, 6 x 5 x 3 cm. Author’s specimen...Sandstone. Figure 3: Geologic map of the Mining District showing the outcrops of the Springdale Sandstone...form the four reefs. I-15 cuts right through the district from the lower left to the upper right. Two cross...mining claim and established the Union Mining District. With the high-grade ores of nearby Pioche on |  | | Journal (issue) | | and more monotonous tasks. This leaves the Sorter free to concentrate on the more interesting aspects of...is initially used to divide the incoming "run-of-mine" shipments of diamonds into two groups called smalls...and components, a recent example being the solid state microprocessor. This device, which packs the heart...the Novello Prospect a n d the abandoned Twin Star Mine, both of which are located about 17 km N W . of...famous Bikita lithium mine about 80 km east of Fort Victoria. Details of the local geology, together with |  | | Journal (article/letter/editorial) | | before use. All mixtures were homogenized in an agate mortar under acetone for approximately 45 min. For...significant part of Cr may occur in the divalent state (Berry and O’Neill 2004). The potential presence...stabilize Cr3+ in our runs, we used the Re–ReO2 solid-state oxygen fugacity buffer in the high Cr experiments...ensure that most of the Cr is in the trivalent state (Li et al. 1995; Berry and O’Neill 2004). Additionally...assemblies were calibrated for pressure against solid-state mineral phase transformation. For the 18/12 and |  | | Journal (article/letter/editorial) | | JanuarylFebruary: Tourmaline on quartz, Cruzeiro mine, Minas Gerais, Brazil. Los Angeles County Museum...Pelt photo. MarcWApril: Beryl and calcite, La Pita mine, Maripi Boyacii, Columbia. Cal Graeber, Leonard...(Herkimer “diamonds’’), Treasure Mountain Diamond mine, near Little Falls, New York. Uli Bahmann specimen...SepteniberlOctober: Gold, Smuggler Union mine, Telluride district, Colorado. Colorado School of Mines Museum...Calcite, variety manganoan, Argentine vein, Idarado mine, San Miguel County, Colorado. Dave Bunk specimen |  | | Journal (article/letter/editorial) | | Garnet Lherzolites from the Kaapvaal Craton (South Africa): Trace Element Evidence for a Metasomatic History...SCIENCES, UNIVERSITY OF CAPE TOWN, RONDEBOSCH 7701, SOUTH AFRICA 2 DEPARTMENT OF EARTH, ATMOSPHERIC AND PLANETARY...features of mantle peridotite xenoliths of southern Africa JOURNAL OF PETROLOGY VOLUME 44 so that it is...that very few cratonic mantle peridotites from South Africa have escaped such enrichment. This is potentially...phlogopite-bearing lherzolite xenoliths from four well-known South African kimberlite localities of the 630 GREÂGOIRE |  | Tronche, E. J., van Kan Parker, M., de Vries, J., Wang, Y., Sanehira, T., Li, J., Chen, B., Gao, L., Klemme, S., McCammon, C. A., van Westrenen, W. (2010) The thermal equation of state of FeTiO3 ilmenite based on in situ X-ray diffraction at high pressures and temperatures. American Mineralogist, 95 (11) 1708-1716 doi:10.2138/am.2010.3410 | Journal (article/letter/editorial) | | pages 1708–1716, 2010 The thermal equation of state of FeTiO3 ilmenite based on in situ X-ray diffraction...of a natural terrestrial ilmenite (Jagersfontein mine, South Africa) and a synthetic reduced ilmenite...were fit to BirchMurnaghan thermal equations of state, which reproduce the experimental data to within...critical role. Keywords: Ilmenite, equation of state, X-ray diffraction, lunar magma ocean Introduction...interior of the Earth, the thermal equation of state of FeTiO3 ilmenite has not been studied extensively |  | | Book (volume) | | rise and development of the diamond mines of South Africa, from an historical, economic and technical...fields when the mines in the Kimberley and Jagersfontein areas were the only diamond mines being worked...collect during my many visits to all parts of South Africa where kimberlite deposits occurred and the filing...Mines, Limited, and Consulting Engineer to the Jagersfontein and Koffy fontein mines. In later years I felt...was necessary to file * "The Diamond Mines of South Africa," by Gardner F. Williams. V . Vl l I I |  | | Book | | carat in ten thousand emerald crys- taken from a mine in North Carolina was transparent. In some respects...grain of Tourmaline and some of the in New York State may waves, impos- a crystal. fine green diopsides...finally latter reaches a point where color is free it is termed a pink sapphire, unless the from a...which a mineral is recognized in the natural state are obliterated in the cutting, and the hardness...carats. Its weight (Plate XVI.) The " Star of the South" was found July, 1853, in the western part of Minas |  | | Book | | Reunert's Diamond Mines of South Africa. ADVERTISEMENTS. A REVELATION. The frequent the transactions... . more SOUTH . 25 MILLIONS -65 . than 1843 IT . . 13 OF POUNDS. 32 AFRICA—CAPE TOWN...L THE OF EG NERA FIELDS WEST. AFRICA. DIAMOND GRIQUALND SOUTH [Reproduced , with permission,... from the Map of n an d South African Exploration Company.] ADVERTISEMENTS. £. BVlRfllESTW... Kimberley South African and International Exhibition. REUNERT’S MINES DIAMOND OF AFRICA. SOUTH 428 1/2 |  | | Journal (issue) | | Identifica- tion card that secures the privileges of many mine s, quarries, clubs, societie s, museums, libraries...138 1WO AGATE FIELDS IN NEW MEXICO. B; Lollie ,\I . /\.'eel; . .......... ..... E CTON MINE, OAKS, P....... . .... ... S0~1E MINERALS OF THE BEDFORD DISTRICT IN NEW YORK. By Alex.111der ,\1,11111 ..•.......rn11.1s T re/o,ir .... ...... . BARE HILLS COPPER MINE OF P.fARYLAND. By Peter Z od.1c . ............ W...SILVER FIRST FO U ND I N NE\X' JERS l·Y IN A (O PP ER MINE ............ .. ... .. ..• 11AJ Oil THOMAS ART H |  | | Journal (article/letter/editorial) | | a diamond exhibition in the De Beers Hall of the Mine Museum — the highlight of the centenary celebrations...pear-shaped Earth Star, recovered in the Orange Free State, and thought to be the largest brown diamond...was the first authenticated diamond found in South Africa — the Eureka, found near the Orange River in...investiture of the Prince of Wales (Prince Charles). The Mine Museum, alongside the Big Hole, currently attracting...Kimberley at the turn of the century, is now part of the Mine Museum. Here, visitors were able to relax in an |  | | Journal (article/letter/editorial) | | Tm~ conditions under which diamonds occur in South Africa are quite different from those of every other...Toit's Pan," " D e Beer's," "Bultfontein," and "Jagersfontein," are being worked in the rock which has brought...almost dug out with a spade. OF DIAMONDS I N SOUTH AFRICA. ~5 It is of greenish or yellowish eolour;...ostrich~egg-shell, small rounded grains of chalcedony, agate, &c., identical with the same substances mixed with...been found in S. Africa. A brief sketch of the various intrusive rocks of S. Africa will help to explain |  | | Journal (article/letter/editorial) | | studying the diamond deposits of the Gran Sabana district of Venezuela. It weighed 20.45 carats and measured...included in this estimate. Three districts in the State of Bolivar produce diamonds; Gran Sabana, El Pao...cent of the production comes from the Gran Sabana district. Most Venezuelanstones are small, but some large...was discoveredin the diamond placers of San Jos6,district of Sincora, Braz7l, in 1843, but prior to 1846...nc, 1892;Moissan,1893)of the DeBeersMine in South Africa mention small amounts of the mineral occurring |  | | Journal (article/letter/editorial) | | Goncharov Institute of Earth Sciences, Saint Petersburg State University, Saint Petersburg, Russia A. Goncharov...have provided important insights into the redox state and geochemical processes in the Earth. Measured... implying a significant effect of mantle redox state on Opx–Grt Fe–Mg exchange thermometry. Unfortunately...collected in the 420–640 m depth range in the diamond mine pit from unusually fresh kimberlites. Details on...for nine of the investigated samples. The valence state of iron and its structural position in the minerals |  | | Book (volume) | | found at the p. 127, line 5. Premier Mine, Transvaal, South Africa. It weighed 3106 carats in the rough...production and almost 56% of world annual production. South Africa is p. 159, line 17. ; ADDENDA Vlll (1968)...stones of smaller sizes. South Africa diamonds Congo Other large producers in Africa are is still the major...producer of stones of gem quality. Ghana, Southwest Africa, Sierra Leone, and Angola. At the present time...Australian opal locality of Lightning Ridge, New South 384, line 4. Wales, was discovered. In 1915 precious |  | Maier, W.D., Peltonen, P., McDonald, I., Barnes, S.J., Barnes, S.-J., Hatton, C., Viljoen, F. (2012) The concentration of platinum-group elements and gold in southern African and Karelian kimberlite-hosted mantle xenoliths: Implications for the noble metal content of the Earth's mantle. Chemical Geology, 302. 119-135 doi:10.1016/j.chemgeo.2011.06.014 | Journal (article/letter/editorial) | | 0001, South Africa g Department of Geology, University of Johannesburg, Auckland Park 2006, South Africa...from more than 20 kimberlite pipes in southern Africa and the Karelian craton, Fennoscandian Shield,...garnet-lherzolites, garnet- and spinel-harzburgites, garnet- free harzburgites, pyroxenites, dunites, and several...sample localities and tectonic units of southern Africa (modified after Griffin et al., 2004). (B) Generalized...University of Cape Town, including the samples from Jagersfontein, Monastery, Frank Smith, Newlands, and the Kimberley |  | | Journal (article/letter/editorial) | | armalcolite paragenesis. Such Ti-rich veins cause strong local enrichment in some incompatible trace elements,...Tompkins, 1984) and thus constrain the oxidation state of the latest metasomatic events 1. INTRODUCTION...identified in phlogopite-richterite peridotites from south African kimberlites, that are genetically related...the Kerguelen oceanic plateau originated in the South East Indian Ridge (SEIR) and was originally attached...stabilization of the oceanic lithosphere in the South East Indian Ridge; and reaction of the resultant |  | | Journal (article/letter/editorial) | | the Western Terrane (Finsch, Kimberley and Jagersfontein) and 10 from the Southeastern Terrane (Northern...showing localities sampled in this study; J, Jagersfontein. After Griffin et al. (2003a,b). Cross-hatching...and gravity data (Corner et al., 1990; Southern Africa Bouger Gravity Map, 1991). In the western parts...the Western Terrane, samples are from the Finsch mine (samples FRB15-) and the pipes of the Kimberley...and KDB/6); one sample (JGF-98/6) from the Jagersfontein kimberlite, near the boundary between the two |  | | Journal (article/letter/editorial) | | (Belgium): Roman, about i A.D. About 2o,ooo-I6,OOOB.C. AGATE. Solutrean (France): also Egyptian pre-dynastic...also Phoenician, x,ooo-5oo B.c. 600-500 B.c. MOSS AGATE. Greek: Oriental seal, possibly Babylonian. 600-480...About x777. PREHNITE. Col. Preh found it in South Africa. •785. EUCLASE. Introduced into Europe from...Found in U.S. A. x876. TIGER EYE. Found in South Africa. About x879. ENSTATITE. x877. HIDDENITE. ...MORGANITE. KUNZITE. BENITOITE. Gem variety found in South Africa. Found in U.S. Found A. in U.S. A. First |  | | Journal (article/letter/editorial) | | Alkremite Xenoliths in the Kaalvallei Kimberlite, South Africa 1 GEOSCIENCE CENTRE, DE BEERS CONSOLIDATED...MINES LTD, P.O. BOX 82232, SOUTHDALE, 2135, SOUTH AFRICA 2 BERNARD PRICE INSTITUTE OF GEOPHYSICAL RESEARCH...WITWATERSRAND, PRIVATE BAG 3, WITS, JOHANNESBURG, 2050, SOUTH AFRICA 3 DEPARTMENT OF GEOLOGY, UNIVERSITY OF TORONTO...xenolith varieties at Kaalvallei include accessory-free bimineralic xenoliths, diamond-bearing eclogite...numerous xenolith localities in areas such as west Africa (e.g. Hills & Haggerty, 1989; Fung & Haggerty, |  | | Book (edition) | | iMi THE DIAMOND MINES OF SOUTH AFRICA SOME ACCOUNT OF THEIR AND DEVELOPMENT RISE BY GARDNER F. ... De Beers Main for Shaft, Kimberley Mine Kimberley Mine Company . 605 667 669 670 671 Illustrations...Views of S3 at Klip-drift 56 ever found in South Africa 58 162 . Kimberley, 1872 .69 Mrs. Rawstorne...Rawstorne Mr. T. 73 B. Kisch Kimberley Mine . just after the Discovery, July, 1871 . . . 175,...87 93 Kimberley Mine, 1 871 94 ..... Around Kimberley Mine, 1871 Kimberley Mine, 1872 95 197, 203 |  | | Book (edition) | | iamond .......... The Origin of theDiamond ... II.— South A frican D iamonds ... ... 7* ... 92 „ III...Stones which had been exhibited for years at the South Kensington Museum, although the official description...in the market. d ay the Jagersfontein A t the present Mine, in South Africa, produces Diamonds of pure...A s ex amples of such stones may be cited the Agate, Malachite and Rock-crystal. That branch of Mineralogy...It is true that occasionally there are slight local differences in crystallization, or in other physical |  | | Report (issue) | | Kingdom . . . ... . .. (1922) Part II. Britisl1 Africa . .. . ,. . .. (1922) Par~ III. Britisl1 America...and New Zealand .. . (1922J Part VI. Europe and Africa (I!"oreign) ~ .. . (1922) Part VII. Foreign Arueriea.... ' • ' ' ' • I ' IMPERIAL INS'TITUTE SOUTH KENSINGTON, S.W. 7 The Imperial Institute was e...from schools and other educ.a tional establishments free. Publications .-Various publications are issued...Rhodesia ••• •• • South~West Africa Tenitory Tanganyika Territory ••• Union of South Africa ..Canada ••• ••• |
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