 | | 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 |  | 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) | | W. HARRIS~ of Geosciences, The Pennsylvania State University, University Park, PA 16802, USA âDepartment...Premier, Roberts Victor, Jagersfontein, Sierra Leone, Star, and Mwadui have been found. The mode of the Ni...differs among kimberlites, however, for each kimberlite sulfide and silicate inclusion containing diamonds...of diamond inclusions. 1. INTRODUCTION sequence pyrite (py ), pyrrhotite (PO), pentlandite (pn), chalcopyrite...Premier, Roberts Victor, and Jagersfontein, in South Africa, and Orapa, in Botswana), for which we previously |  | | Journal (article/letter/editorial) | | the Ubendian terranes and Tanzanian craton. The star shows the location of the study area (modified from...502000 9078000 CL1101 CL1030 Fig. 3. Simplified local geology map of the Helio Resource Corp. property...occurrences. Artisanal workings visited during field seasons in 2010 and 2011 are also shown (open circles)...which are present in the majority of rivers in the field area. Eastings and northings are reported as UTM...et al., 1954; Daly, 1988; Lenoir et al., 1994; Theunissen et al., 1996; Boniface et al., 2009; Fig. 2) |  | | Book | | the Cruzeiro tourmaline and mica mine and the Jacobina amethyst mine. He owns several other mines as well...the history of mankind. To the impecunious and the free spirit it meant sudden wealth; to the more worldly-wise...who is to gainsay the latter? In this treacherous field, where natural wonders can be duplicated with synthetic...of transience precious stones in their natural state or else transformed into works ofart thus assume...traditionally more desired stones. Diamond mining in the state ofBahia, during the Empire. Freed from traditional |  | | Journal (issue) | | Euclase, 2.3 cm, from the GachalĂĄ mine, GuaviĂł-GuatĂŠque mining district, BoyacĂĄ Department, Colombia. Gail...cm, from Stak Nala, Haramosh Mountains, Skardu district, Gilgit-Baltistan, Pakistan. Zach Goodman collection;...Budd photo. Tanzanite, 7.6 cm, from the Merelani mine near Arusha, Tanzania. Barry & Beth Kitt collection;...Fluorite on quartz, 13 cm, from the Yaogangxian mine, Chenzhou Prefecture, Hunan Province, China. The...Spodumene (variety kunzite), 9 cm, from the Urucum mine, GalilĂŠia, Minas Gerais, Brazil. Gus & Jane Eifler |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Book | | Sciences in Brussels and the Royal Museum for Central Africa in Tervuren played an important role in descriptive...originating from foreign countries, especially in central Africa. Also the contributions of mining organizations...the old times minerals were known by traditional local names, given by miners (e.g. quartz, "mispickel';...used for soil amelioration, named after the municipality of Beringen in the Belgian province of Limburg...described. When reference is made to a bilingual municipality, then the name of the locality is ::,:: m -< |  | | Corporate Document | | 9.1 Introduction 9.2 Amantaitau-Daughyztau ore field 9.2.1 Amantaitau deposit 9.2.2 Daughyztau deposit...5 Kochbulak-Kairagach ore field 9.5.1 Kochbulak deposit 10. SOUTH AFRICA 10.1 Western Deeps 10.2 Fairwiew...16 Corinthia 13.17 Edward's Find 13.18 Polaris South 14. Intermediate and felsic igneous host rocks 14...15.6 Union Reefs 15.7 Cosmo Howley 15.8 Yilgarn Star 15.9 Kundana 15.10 Chalice 15.11 Griffin's Find...dominance of pyrrhotite and calcite instead of pyrite and dolomite in the deposits, suggest that the |  | | Journal (issue) | | from the 1700 level, Zinc Corporation mine, Broken Hill, New South Wales, Australia. Collection of the...collection, John Chapman photo. ⢠2.5 cm, Top Camp mine, Western Ausytralia. George Stacey collection, Jeff...Scovil photo. Middle row from left: ⢠2.3 cm, Kintore mine, Coolgardie, Western Australia. Aloe Family collection;...Chapman photo. ⢠1.4 cm, Chapmanâs Gully, South Australia. South Australian Museum collection; Jeff Scovil...Jeff Scovil photo. ⢠4.2 cm, Mongalata goldfield, South Australia. Geoscience Australia collection; Jeff |  | | 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...New England Garnet BY RUSS BEHNKE 30 Idaho's "Star" Garnet: Symmetry and Inclusions BY MICKEY E. GUNTER...Spessartine, schorl, and a/bite from the Little Three Mine in San Diego County, California; 6. 6 cm tall; Bryant...is related to garnet's symmetry and creates the "star" effect (page 30). A cat's-eye phenomenon has been |  | | 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 |  | | Book | | Copper Cliff 83 Migration Data for Regional Municipality of Sudbury (from 1980-81 to 1989-90) 181 Characteristics...Canadian Mines Using LDC, 1990 190 LDC Employees by Mine and Region of Residence 197 Purchasing Profiles...Colonial-Frontier Era 166 Site and Setting of the Regional Municipality of Sudbury 173 Canadian LDC Mines, 1972-1990...communities that for a few short decades served the local timber operations and then with them swiftly disappeared...significant though less direct contributions to the local economies of centres like Sault Ste. Marie and Thunder |  | | 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 (issue) | | Gem Notes Baryte from South Dakota, USA| Gems from Mong Long, Myanmar|Pyrite and other sulphides from...Tanzania|Tsavorite from Ethiopia|Black star CZ sold as natural star rutile|Cameos at the Natural History...Kettle North East â Mark W. Houghton South East â Veronica Wetten South West â Richard M. Slater For full...blood ruby, royal blue and cornflower sapphire, old mine/ Muzo green emerald, sunrise and sunset padparadscha...Kokichi Mikimoto. No. 8 continues the history with South Sea pearl culturing. Issue No. 9 features three |  | | Journal (article/letter/editorial) | | titanates from micaceous kimberlite, Star mine, Orange Free State, South Africa ROGER H. MITCHELL Department...a - K - V titanates from micaceous kimberlite (Star mine, S. Africa). These data significantly extend...suite consists of anhedral xenocrysts that are Ba-free. In this suite relatively Nb-rich varieties (>4...titanate, hollandite, priderite, kimberlite, lamproites, Star mine, South Africa. Introduction COMPLEX K - B...recognized in the New Elands micaceous kimberlite, South Africa (Mitchell and Haggerty, 1986) and the |  | | Journal (issue) | | (a variety of zoisite), 9 cm, from the Merelani mine, located on the slopes of the Lelatema Mountains...cover: Top left: Euclase, 2.2 cm, from the La Marina mine, Colombia. Top right: Topaz, 8.4 cm, from Ouro Preto...left: Phosphophyllite, 2 cm, from the Unificada mine, Potosi, Bolivia. Bottom right: Grossular, 3.5 cm...rest of the Mineralogical Record staff, ogling six free-standing display cases that had been set up by someone...paper is also abrasive. Clean: Surficially damage-free. When a perfection-seeker first sees a specimen |  | | Journal (article/letter/editorial) | | edu DIAMOND Dutoitspan Mine, Kimberley Northern Cape Province, South Africa Only in the . . . valley...Gardner F. Williams in The Diamond Mines of South Africa (1904, p. 115) T he valley referred to by...diamonds. As a child, this tale was a favorite of mine, especially as I imagined the birds to be pteranodons...prospectors then made a further offer to return to the field and bring back a few million dollars worth of diamonds...dispatched with Slack and Arnold to check out the field. A mining engineer with a reputation for exposing |  | | Journal (issue) | | Characteristics of Blue to Yellow Beryl History of the Chivor Mine, Part I EDITORIAL 1 Spring 2020 VOLUME 56, No...beryl. p. 35 66 History of the Chivor Emerald Mine, Part I (1880â1925): From Rediscovery to Early Production...Ortiz Chronicles developments at the Chivor emerald mine in Colombia between 1880 and 1925, based on archival...laminated nucleus ⢠Bismuth glass-filled Burmese star ruby 140 G&G Micro-World Actinolite in spinel...156 Gem News International Tucson 2020 ⢠Burmese star peridot ⢠Top-quality demantoid ⢠Russian emerald |  | | Book | | will rapidly become a standard reference in the field. Carl A. Francis Cambridge, Massachusetts vii ...preparation to similarly treat Europe, Africa, and North and South America. The localities considered classic...still in operation, such as Broken Hill in New South Wales and the Deccan Plateau zeolite-producing quarries...notable example in this category is the Nuristan District of Afghanistan, which over the past 10 years has...are considered Asiatic. Australia is treated state by state. The discussion for each locality contains |  | | Report (issue) | | famous Little Three mine, Ramona district, San Diego County, California, the star of the show (to my taste)...topaz: Topaz, 6 cm, from the Little Three mine, Ramona district, San Diego County, California. Ex Bryant...impressive: Axinite, 5 cm, from the Little Three mine, Ramona district, San Diego County, California. Ex Bryant...the Pala district, San Diego County, especially from the Stewart mine. And from the Himalaya mine, Mesa...Mesa Grande district, San Diego County, Dave offers (besides plenty of elbaites) such rarities from that |  | | Book | | admittedly controversial chapter, since many textbooks state that Mogok is of "contact" metamorphic origin. No...provided the TEM photomicrographs of opal. The South Australia Department of Mines and Energy provided..., was responsible for photographs of the Argyle mine and the spectacular pink diamond. The Smithsonian...about 10 percent of the diamonds recovered from kimberlite pipes are of gem quality. In placer deposits...either side of the mouth of the Orange River in South Africa and Namibia represent millions of years of weathering | | | Book | | admittedly controversial chapter, since many textbooks state that Mogok is of "contact" metamorphic origin. No...provided the TEM photomicrographs of opal. The South Australia Department of Mines and Energy provided..., was responsible for photographs of the Argyle mine and the spectacular pink diamond. The Smithsonian...about 10 percent of the diamonds recovered from kimberlite pipes are of gem quality. In placer deposits...either side of the mouth of the Orange River in South Africa and Namibia represent millions of years of weathering |  | | Journal (issue) | | Articles Famous mineral localities: The Sapo mine, Ferruginha district, Conselheiro Pena, Minas Gerais, Brazil...Menezes Famous mineral localities: The Lac dâAmiante mine, Black Lake, Thetford Mines, QuĂŠbec . . . . ...Fluorite from Riemvasmaak, Northern Cape Province, South Africa . . . . . . . . . . . . . . . ...gather up rocks and stones from the desert or from local quarries and then slice and mineral specimens,...enjoyed (and still do enjoy) finding raw material for free while out rooting around in nature, and then being |  | | 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; |
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