 | Perritt, S., Preston, R., Viljoen, F., Van Der Linde, G. (2015) Morphology, Micro-Structure and Chemistry of A Deformed Garnet Megacryst Suite From Monteleo Kimberlite, Free State Province, South Africa. South African Journal of Geology, 118 (4) 439-454 doi:10.2113/gssajg.118.4.439 | Journal (article/letter/editorial) | | MEGACRYST SUITE FROM MONTELEO KIMBERLITE, FREE STATE PROVINCE, SOUTH AFRICA. S. PERRITT Previous address:...2006, South Africa Current address: De Beers Group Services, Private Bag X01, Southdale, 2135, South Africa...Services, Private Bag X01, Southdale, 2135, South Africa e-mail: robin.preston@debeersgroup.com F. VILJOEN...Johannesburg, PO Box 524, Auckland Park 2006, South Africa e-mail: fanusv@uj.ac.za G. VAN DER LINDE De...Services, Private Bag X01, Southdale, 2135, South Africa e-mail: gert.vanderlinde@debeersgroup.com Š |  | | Journal (article/letter/editorial) | | selected Group II kimberlite dyke arrays in South Africa: implications for kimberlite emplacement mechanisms...Š 2003 Geological Society of South Africa ABSTRACT Group II kimberlite dykes occur in small, dominantly...opposing dyke contacts, âin-situâ breccia, multiple kimberlite stringers within a dilated dyke-parallel fracture...bridges at dyke-fracture offsets/overlaps, kimberlite-free offset/overlap areas and calcite vein fibres...model of orthogonal host rock dilation during kimberlite emplacement. Terminations of dyke-fracture segments |  | | Journal (article/letter/editorial) | | g e o r ev Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field a,â, Johann...Southdale, 2135, South Africa c De Beers Group Services, PO Box 47, Kimberley, South Africa d De Beers Canada...April 2008 Keywords: Diamond Kimberlite Diatreme Pipe Dyke Mantle-xenolith Diamond-inclusion A B S T R...discovery of diamonds in river deposits in central South Africa in the mid nineteenth century, it was at Kimberley...recognized. These volcanic rocks, that were named âkimberliteâ, were to become the corner stone of the economic |  | Gurney, John J., Hildebrand, Peter R., Carlson, Jon A., Fedortchouk, Yana, Dyck, Darren R. (2004) The morphological characteristics of diamonds from the Ekati property, Northwest Territories, Canada. Lithos, 77 (1) 21-38 doi:10.1016/j.lithos.2004.04.033 | Journal (article/letter/editorial) | | Dyck c a Mineral Services, South Africa University of Cape Town, South Africa c BHP Billiton Diamonds Inc...Examination of exploration diamond parcels from 13 kimberlites on the Ekati Diamond Minek property revealed...pseudo-hemimorphic crystals. Some octahedra have a fibrous diamond coat. The diamonds are predominantly colourless...Siberia (Orlov, Yu L., 1977. Mineralogy of the Diamond. Translated from the Russian language and published...diamonds. PhD thesis, University of Cape Town, South Africa.) for the Kaapvaal craton. This mixed character |  | | Journal (issue) | | Mining at Habachtal, Part II New Regular Feature: Diamond Reflections VOLUME 58 2022 Tucson Report NO....Article Award 48 Lab Notes HPHT-processed type Ia diamond ⢠Large green and yellow diamonds colored by nickel...CVD laboratory-grown diamond ⢠Unusual laser drill holes in an HPHT-grown diamond ⢠Hydrothermal synthetic...stains on rough diamond surface ⢠Spessartine garnet in aquamarine ⢠Hematite in diamond ⢠Hyalite with...Quarterly Crystal: Hillocks on beryl p. 71 72 Diamond Reflections The debut of this regular section explores |  | | Journal (issue) | | cover Vanadinite 3.4 cm, from the North Geronimo mine, La Paz County, Arizona. Dick Morris collection;...collectors. Contents How wulfenite became the official State Mineral of Arizona by Alexander G. Schauss A Fat...the Official State Mineral of Arizona Alexander G. Schauss In 2017, the Arizona State Legislature voted...voted to make wulfenite the official state mineral of Arizona. Considering that Arizona is the source...just moved from Washington State to Arizona, prepared an article on state minerals intended for publication |  | | Journal (article/letter/editorial) | | Petrogenesis of the Late Cretaceous northern Alberta $ kimberlite province D. Roy Eccles a,b,*, Larry M. Heaman...cluster, the Buffalo Head Hills field and the Birch Mountains field. The regions can be distinguished...their non-archetypal kimberlite signature (Mountain Lake) or, in the case of kimberlite fields, primitive...I-type kimberlite fields in the northern Alberta. This is important from the viewpoint of diamond exploration...chemistries similar to those of primitive hypabyssal kimberlite in the Northwest Territories. Based on whole-rock |  | | Journal (issue) | | Moore Phosphate minerals from the Leveaniemi iron mine, Svappavaara, Sweden .............................Hollabaugh Laueite from Hagendorf-Siid andthe Palermo mine ................. 363 by L. C. Pitman New data...the cover of this issue. SEEING THROUGH ROCK What field collector hasnât wished for a magical device that...image of a crack hidden in the back (roof) of a mine adit (from A. P. Annan etal. (1988) Radar sounding...illustrated in the Mineralogical Rec ord, available free from the editor. (Photocopy ing rights granted; |  | | Journal (issue) | | Burmese sapphires from Mogok, based on a series of field expeditions over the last decade. 318 Gemological...chrysoberyl ⢠Diamond faceted as iconic Apple logo ⢠Two pairs of antique Mughal spectacles with diamond and emerald...inclusions ⢠Radioactive green diamond ⢠Rainbow graining in diamond ⢠Monazite (?) in quartz ⢠Spiral...sales of pink and blue diamonds from the Argyle mine ⢠Chalcedony-epoxy composite imitation of âcandy...Paris, France New York, New York Johannesburg, South Africa Al Gilbertson Laura Otter Wuyi Wang Carlsbad |  | HANSON, E.K., MOORE, J.M., BORDY, E.M., MARSH, J.S., HOWARTH, G., ROBEY, J.V.A. (2009) CRETACEOUS EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE DIATREMES. South African Journal of Geology, 112 (2) 125-140 doi:10.2113/gssajg.112.2.125 | Journal (article/letter/editorial) | | EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE DIATREMES E.K. HANSON...Rhodes University, P.O. Box 94, Grahamstown, South Africa email: emilykhanson@gmail.com; j.moore@ru.ac...Kimberley, South Africa email: jock.robey@debeersgroup.com Š 2009 June Geological Society of South Africa ABSTRACT...Group II and fourteen Group I kimberlite diatremes in central South Africa were examined for upper crustal...Supergroup in the main Karoo basin at times of kimberlite eruption, the Cretaceous erosional history of |  | | Journal (issue) | | v/Dec2023 1. 98, No.6 - - - - - - - - ROCKS & MINE $12.95US $12.95CAN IIUJ ., . vww.tandfonlirie...tandfonlirie .com/vram MIM MUSEUM Vesuvianite Jeffrey Mine. Val-des-Sources. Les Sources RCM, Es t rie, Quebec...Bruce Cairncross, University of Johannesburg, South Africa Steven C. Chamberlain, Syracuse, NY Merrill...Technology, Socorro, NM Michael leybov, Moscow State University, Russia Mark Mauthner, Graz, Austria...edition for any number of concurrent users across a local area network. Subscription offices: USA/North America: |  | | Book | | herein). Notices Knowledge and best practice in this field are constantly changing. As new research and experience...Kuopio, Finland P. Heino Yara Suomi Oy, Siilinjärvi Mine, Siilinjärvi, Finland R.J. Herrington The Natural...US T. Huhtelin QP-FRB Outokumpu Ferrochrome Kemi Mine, Kemi, Finland E. HyvĂśnen Geological Survey of Finland...Survey of Finland, Rovaniemi, Finland, Mustavaara Mine Ltd, Oulu, Finland J. Kinnunen Mawson Resources...Oulu, Finland Contributors T. Mäki Pyhäsalmi Mine Oy, Pyhäsalmi, Finland H.V. Makkonen Geological |  | | Journal (article/letter/editorial) | | be restrictedto two distinctregions. The Orapa kimberlite districtin centralBotswanacontains30 knownpipes...(AKI: Orapa diamondmine; NC 4 Pikwe nickel-copper mine; Cu 6 Ngwako Pan copperoccurrence). lite facies)...141 Geology and Mineral Occurre of Eastern NCI Phoenix NC 4Pikwe !o⢠Botswana NC 2 Selkirk NC 3 Tekwane...,;'â˘schist Ă Ă .TATI GOLD DISTRICT Ă SELKIRK NICKEL COPPER DISTRICT AK/L-⢠( .V . ' t'ORAPAâ˘'t':...Ăv . O. ropa tKIMBERLITE 'â˘'nâ˘):)Em DISTRICT \< DKI Ă 'â˘DISTRICT .â˘v.. ,,â˘. ; .' . Cu 2 Mokola Ă' r- |  | | Book | | about diamonds trip readily off the tongue. A diamond may be âforeverâ and âa girlâs best friendâ, but...but the truth about the international diamond business is not so romantic. Timothy Green has travelled... salesmen and smugglers not only in the main diamond centres of London, New York, Antwerp, Tel Aviv...lig âs & | likely to replace South Africa as the worldâs champion diamond producer by 1985. It is also...most illustrious diamond salon; Lazare Kaplan, who studied the famous Jonker diamond for a whole year |  | | Journal (issue) | | formation. 223 Blue Sapphires from the Baw Mar Mine in Mogok Hpone-Phyo Kan-Nyunt, Stefanos Karampelas...Notes Black diamond with unusual color origin ⢠Silicon in natural type IIa and type IaB diamond ⢠Stellate...in vivid pink morganite ⢠Spinel submitted as diamond ⢠Large synthetic moissanite with silicon carbide...the submission of articles on all aspects of the field. Please see the Guidelines for Authors at gia.edu/gandg...geology of diamonds. The cover image, of diamond crystal in kimberlite matrix, was chosen to highlight the |  | | Book | | Europeans set foot here. When Michigan became a state in 1837, one of the first actions of the fledgling...legislature was to establish a geological survey of the state, to "furnish a full and scientific description of...them today. Michigan minerals helped to build the state and nation, and they continue to be an important...Michigan's bountiful mineral legacy. Harold R. Fitch State Geologist and Chief, Geological and Land Management...new minerals and mineral occurrences within the state. As a result, in the early 1980s Professor Heinrich |  | | Book | | The Role of the State in Technological Progress, 1750â2000 Espen Moe Triumph of the South A Regional Economic...West Africa Raymond E. Dumett 63 3 Cecil Rhodes, De Beers and Mining Finance in South Africa: The...Asante and Northern Territories (West Africa) about 1905 South Africa, c.1870â1910 The Tarapaca Mining Region...installations and smelters Central and Southern Africa, showing the Copperbelt of Northern Rhodesia, c...Columbia. His recent books include El Dorado in West Africa: The Gold Mining Frontier, African Labor and Colonial |  | Ogilvie-Harris, R. C., Field, M., Sparks, R. S. J., Walter, M. J. (2009) Perovskite from the Dutoitspan kimberlite, Kimberley, South Africa: implications for magmatic processes. Mineralogical Magazine, 73 (6) 915-928 doi:10.1180/minmag.2009.073.6.915 | Journal (article/letter/editorial) | | Perovskite from the Dutoitspan kimberlite, Kimberley, South Africa: implications for magmatic processes...processes R. C. OGILVIE-HARRIS*, M. FIELD, R. S. J. SPARKS AND M. J. WALTER Department of Earth Science...four different kimberlite lithofacies from the Dutoitspan pipe, Kimberley, South Africa, which range from...diamondiferous kimberlite has the greatest Fe3+ content and highest fO2 (NNO 3.6 to 1.1). The kimberlite containing...preserving diamond as a consequence. K EY WORDS : perovskite, oxygen fugacity, kimberlite, ferric iron |  | | Journal (issue) | | TIME Stretching for safety at the Allan potash mine RETURN TO NATURE The greening of Key Lakeâs waste...weâre there. Camp at North Arrow Mineralsâ Pikoo diamond property in northern Saskatchewan. ORE is produced...machines hard at work. Cat products are on more mine sites than any other equipment line, delivering...delivering the reliability and durability you need to mine efficiently and productively. Kramer Ltd. offers the...ADVERTISERS Tap Communications Inc. 203-262 Avenue B South Saskatoon, Saskatchewan S7M 1M4 Telephone: (306) |  | | Journal (issue) | | axes in southern Africa .âŚâŚ..âŚâŚâŚâŚâŚâŚâŚ. 6 Drainage evolution in south-central Africa since the break-up...of field evidence and interpretations ................. 8 Report on the Geological Society field trip...our Phaup and Bond Award certificates for 2008 -- free of charge. This is, as previously, a wonderful gesture...our recent liaison with the Geological Society of Africa through their Secretary for the Southern Region...mining-related scar occurs on the hill slope above King Mine in Mashava and there are the dump slips on either |  | | Journal (issue) | | and De Beers ramp up exploration at Athabasca Kimberlite Project Philip Bashnick: Prospector, Trapper...robust Saskatchewanâs potash industry engages with local communities Manitoba and Saskatchewan Exploration...S7K 5Z1 Phone: (306) 384-8593 Call us today Toll Free: 1-(844)-384-8593 www.certifiedsalesandrentals.com...core from the elements . PO Box 58 201-1st Street South Pleasantdale Saskatchewan S0K 3H0 T (306) 874-5540...Street eaSt, SaSkatoon, Sk Phone: (306) 242-4427 toll Free: 1-844-542-2247 inFo@FortiScorPoration.com fortiscorporation |  | | Journal (issue) | | A FIELD GUIDE TO ROCKS AND MINERALS By FREDERICK H. POUGH, Curator of Minerals, American Museum of Natural...photographs, 72 in full color, and a simplified Field Guide to identification. Every mineral the Rockhound...lists Gem Cutting Equipment, Grinding Wheels, Diamond Blades, Sanding Cloth, and Polishing Powders, Jewelry...Locket Loops, Chain by the foot, Bezel Wire, etc. Field Trip Books and Books of all kinds on Minerals, Gems...Rest 2.25 2âCast Splash Shields 15.00 1âJig Block DIAMOND 1â100 Grit Wheel 8"xlV2"..... 7.25 DRESSER 10.90 |  | | Journal (article/letter/editorial) | | geochemical character of kimberlite is strongly influenced by the nature of the local underlying lithospheric...sub-lithospheric. Although the composition of primitive kimberlite melt remains unresolved, kimberlites are likely...the coreâmantle boundary. Keywords : hypabyssal kimberlite, lamprophyre, orangeite, crustal contamination...lithospheric mantle INTRODUCTION A first look at a kimberlite (see Fig. 1 in Giuliani and Pearson 2019 this...their origins. Due to their hybrid nature, no kimberlite sample represents, or even likely approximates |  | | Report (issue) | | hematite is from the Wessels Mine near Hotazel in northern Cape Province, South Africa. Dan Carlson specimen;...Cover: Grossular on diopside; 7.1 cm tall Jeffrey Mine, Asbestos, Richmond County, Quebec, Canada Paul...Spessartine, schorl, and a/bite from the Little Three Mine in San Diego County, California; 6. 6 cm tall; Bryant...uranium-vanadium deposit of the Sandy Mine in the Laguna District, New Mexico, is the type locality for...Sandstone, Laguna, Valencia County, New Mexico; field of view 8 mm Hans Jurgen Wilke collection; Manfred |  | | Journal (issue) | | Gemstone and Pearl Testing 36 Emeralds from South America â Brazil and Colombia 48 Clinohumite â The...terms are being completed. With the support of local government authorities, the first Gembureau was...Opening a Tsavorite Mine T anzaniteOne Limited is working towards opening a tsavorite mine not far from its...Tanzania, about 20 kilometers from its tanzanite mine. The project has a total indicated resource of 1...establishing an economic model for a potential tsavorite mine. We expect to provide a further resource update |
|
