 | | Journal (article/letter/editorial) | | 3.4 to 3.1 Ga pyrite at the Princeton gold mine, Barberton Greenstone Belt, South Africa Takeshi Kakegawa...The Princeton mine is one of several mesothermal gold deposits found in the Barberton Greenstone Belt...isotopes of pyrite were performed on four representative samples collected from the Princeton mine. The d34S...determined in situ on individual pyrite crystals or aggregates of fine-grained pyrite by the laser microprobe...analyses), and also on aggregates of separated pyrite crystals by the conventional Cu O 2 combustion |  | | Journal (article/letter/editorial) | | andTraceElementsfromSulfides of Archcan Greenstone Belts in South Africa A Contribution to the Knowledgeof theOlde...found in the vein-typedepositof the Old Star Gold Mine in the Murchison:Range. The variableisotopicratios...edin pyrites from gold-sulfidedepositsin the Barberton Mountain Land supportthemetallogenetic concepts... over a distance of more than 2 and 3). The Barberton Mountain Land forms a rugged, wedge-shapedmountain...1 and 2). In Trace elementinvestigations of the pyrite associ- the Mountain Land the Swaziland Sequencehas |  | | 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, Chapman’s Gully, South Australia. South Australian Museum collection; Jeff Scovil...Jeff Scovil photo. • 4.2 cm, Mongalata goldfield, South Australia. Geoscience Australia collection; Jeff |  | | Journal (article/letter/editorial) | | referred mainly to fossils, formed by calcite and pyrite, it also included pseudomorphs in the “mineral...Guanajuato (Mexico) and has become the richest silver mine in the world, in more recently Bou Azzer and Imiter...ceased vein. The San Juan production by the de Rayas mine in time of World War II. Guanajuato also In 1946...very city In Morocco, the of Oberschlema Bou Azzer mine, itself, which finally already very had to be relocated...and east of Schlema, 2014 Tucson show. The Imiter mine began its modern producing many quality specimens |  | | Journal (article/letter/editorial) | | rocks of the 3.2 Ga Moodies Group, Barberton Greenstone Belt, South Africa Angela M. Hessler ∗ , Donald R...the 3.2 Ga Moodies Group in the Barberton greenstone belt, South Africa, are analyzed petrographically...rocks; Paleoweathering; Paleoclimate; Provenance; Barberton Greenstone Belt 1. Introduction Surface conditions...1998), the abundance of detrital minerals, such as pyrite, that would have been unstable in an oxidizing...rocks of the 3.2 Ga Archean Moodies Group in the Barberton Greenstone Belt (BGB). The initial objective is |  | | Journal (article/letter/editorial) | | 71(2), pp. 123–142 Gold-bearing arsenopyrite and pyrite in refractory ores: analytical refinements and...approach has been used to study Au occurrences within pyrite and arsenopyrite in four refractory Au ores from...Typical growth patterns and As-Au diffusion zoning in pyrite and arsenopyrite may account for the very irregular...minerals. K EY WORDS : gold, arsenic, arsenopyrite, pyrite, refractory ores, growth zoning, electron microprobe...is contained within sulphide crystals, commonly pyrite (FeS2) and arsenopyrite (FeAsS). Refractory Au |  | | Report (issue) | | things here from the famous Little Three mine, Ramona district, San Diego County, California, the star...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 |  | | Journal (article/letter/editorial) | | Early Archaean spherule beds in the Barberton Mountain Land, South Africa: no evidence for impact origin Christian...of spherule-rich layers in the Barberton Mountain Land, South Africa, which were previously inferred...abundances are high where sulphide minerals (e.g., pyrite, gersdorffite, and chalcopyrite) and/or chromite...abundances of the siderophile elements in some Barberton samples and their enrichment in secondary minerals...Nickel-rich Cr-spinels, which are found in some of the Barberton spherule samples, have low Fe3+/Fe(total) ratios |  | | Journal (article/letter/editorial) | | Fairview Mine—multiphase gold mineralization during regional folding, Barberton Greenstone Belt, South Africa...Gold production in Fairview Mine in the Barberton Greenstone Belt, South Africa, is focused on high-grade...relationships with other auriferous reefs from the Fairview Mine complex indicate a late timing of the MRC-type mineralization...protracted fluid flow events. Keywords Orogenic gold . Barberton Greenstone Belt . Sheba fault . Multiphase timing...years, gold mining in the Barberton Greenstone Belt (BGB) in South Africa has produced some 350 tons |  | | Journal (article/letter/editorial) | | Controlin the SteynsdorpGoldfield, Barberton Mountain Land, South Africa R. P. VILJOEN',R. S^AGER,A•rD M...V•tJOEN Abstract The Barberton Mountain Land of the Republic of South Africa representsa typical early...SteynsdorpGoldfield in the southernportion of the Barberton belt has revealed a remarkable structural and...mineralizationalong the northern flank of the Barberton Mountain Land. Finally a scheme,basedmainly...general. Introduction T•- Barberton Mountain Land of the Republic of South Africa, constitutesa typical early |  | | Journal (article/letter/editorial) | | Mesoarchean mineralisation in the Barberton Greenstone Belt, South Africa Andrea Agangi a,⁎, Axel Hofmann...University of Johannesburg, Auckland Park 2006, South Africa Materials Research Department, iThemba LABS...Foundation, PO Box 722, Somerset West 7129, South Africa AGH University of Science and Technology, Faculty...2013 Keywords: Mesothermal gold Pyrite Arsenopyrite Archean Barberton Greenstone Belt a b s t r a c t...gold mines in the Paleoarchean Barberton Greenstone Belt of Southern Africa. At these mines, gold is associated |  | | Journal (article/letter/editorial) | | of gold mineralisation in the Barberton Greenstone Belt, South Africa M.A.H. Altigani, R.K.W. Merkle...Pretoria, Private Bag X20, Hatfield, Pretoria 0028,South Africa a r t i c l e i n f o Article history: Received...2015 Available online 18 December 2015 Keywords: Barberton Gold Hydrothermal Halogen Mineralisation a b... Fairview, and New Consort gold mines in the Barberton Greenstone Belt (BGB) identify two main types...first type occurs associated with sulphides (mainly pyrite), either as inclusions (10–30 μm) or as sub-microscopic |  | Agangi, Andrea, Hofmann, Axel, Eickmann, Benjamin, Marin-Carbonne, Johanna, Reddy, Steven M. (2016) An atmospheric source of S in Mesoarchaean structurally-controlled gold mineralisation of the Barberton Greenstone Belt. Precambrian Research, 285. 10-20 doi:10.1016/j.precamres.2016.09.004 | Journal (article/letter/editorial) | | structurally-controlled gold mineralisation of the Barberton Greenstone Belt Andrea Agangi a,⇑, Axel Hofmann...Geology, University of Johannesburg, Johannesburg, South Africa c Université Lyon, UJM –Saint Etienne, Laboratoire...Archaean Gold Barberton Greenstone Belt Multiple S isotopes a b s t r a c t The Barberton Greenstone Belt...Belt of southern Africa hosts several Mesoarchaean gold deposits. The ores were mostly formed in greenschist...sulfide ore from Sheba and Fairview mines of the Barberton Greenstone Belt to distinguish ‘‘deep” S sources |  | | Catalog/List | | sunbust effect , cut and polished slab 2.5 xl .5 Mine de L' Etoile Congo £20 3. LEPIDOLITE, choice display...fine pale green fibrous mass with some quartz. 3x2 South Norway £6 Selasvatn 9. TOURMALINE dark green elongated...NATIVE SILVER thin sheet about lxl.5 inches La Noria mine, San Martin, Zacatecas Mexico £15 , 16. NATIVE COPPER...nice Ix 2.5 inch exposed cleavage surface. Mission Mine, Pima County, Arizona USA £25 17. GRAPHITE, pure...pure metallic mass about 2x4 inches Ratnapure district SriLanka £15 18. BARITE very well formed single |  | | Journal (article/letter/editorial) | | fresh drill core from the Kaapvaal Craton in South Africa and from the Pilbara Craton in Australia vary...Chemical Geology 218 (2005) 135–169 ered in South Africa and Australia. They are 3.25 to 2.20 Ga in age...and exposed on the Kaapvaal Craton of southern Africa (Fig. 1) and on the Pilbara Craton in the Pilbara–Hamersley...metamorphism, generally less than greenschist facies. South African samples are from the ~ 3.3 Ga Fig Tree Group...Swaziland Supergroup is exposed in the 3.4 to 3.1 Ga Barberton Greenstone Belt located in the eastern part of |  | | Book | | Summary of the geological succession in the Newquay district. ~ < z~ ~ ~ ~ 0 ALLUVIUM BEACHDEPOSITS BLOWNSAND... BRITISH GEOLOGICAL SURVEY Geology of the Newquay district a brief explanation of the geological map Sheet...Keyworth, Nottingham: British Geological Survey district - ♦ ♦ 11 CONTENTS 2 3 1 1 Introduction...cover:Summary of the geological succession in the Newquay district. 1 Simplified map of bedrock geology 3 2 Passive...10 4 Generalised sequence of mineralisation in south-west England 14 5 Constituent mines of the Great |  | | Journal (article/letter/editorial) | | in clay minerals of the Archaean Barberton Greenstone Belt(South Africa) Theofilos Toulkeridis a,b, Norbert...Moodies Group of the Archaean Barberton Greenstone Belt in South Africa. Clay separates of forty sedimentary...eastern edge of the Kaapvaai Craton in southern Africa (Fig. 1) and consists of deformed and variably...2. Geological setting and sample locality The Barberton Greenstone Belt being one of the best preserved...+ + + + + + + + + SWAZILAND SUPERGROUP BARBERTON GREENSTONE BELT + + + Early potassic granitoid |  | | Journal (issue) | | Twenty-three, Number Three ® Articles Gold in South Africa ..............................................Cairncross & C. R. Anhaeusser Minerals of the Linwood mine, Scott County, Iowa ............. 231 by P. L. Garvin...and this must have introduced him to many other local mineral collectors and possibilities for further...of this typically natrolite covered material for local dealers as well as himself. He used much of this...in the still open underground workings of the Gem mine. He encountered an open pocket containing well formed |  | | Journal (article/letter/editorial) | | Concentration of Gold in the Early Precambrian of Southern-Africa R. P. VILJO~N*, R. SAAGER** and M. J. VILJOEN*...Geology, University of Witwatersrand, Johannesburg, South Afrika ** Vancouver, Canada The important gold...gold deposits of the early Precambrian of Southern Africa are confined to two main geologic environments...of a granite-greenstone terrain similar to the Barberton region of the Eastern Transvaal. An attempt is...Granit-Grtingestein-Komplexen, wie sie in der Umgebung yon Barberton im 6sdichen Transvaal auftreten, gesucht wetden |  | | Journal (issue) | | c5anvw,((e,vMintrafs Mineral Dealer & Mine gent Levant Gallery Lower Boscaswel I, Pendeen, Near Penzance...(0414) 3673674 ALL SUBSCRIPTIONS are payable in local currency, or direct to the UK in Sterling. Barite...Schofield. 21 Park Lane, Blaxton, Nr. Doncaster, South Yorkshire, England. Telephone: (0302) 770248 5...pseudomorpbs after orthoclase from Wheal Coates, St. Agnes 30 M.P.Cooper Present day collecting at Cligga...Minerals 35 37 FRONT COVER Caledonite. Red Gill Mine., Caldbeck Fells, Cumbria. Largest crystal 1.25 |  | | Journal (article/letter/editorial) | | monzonite is surrounded on the north, east, and south by an aureole of contact metamorphism. On the western...37), lies north and east of the Oreana tungsten mine, while the Rye Patch intrusion, also quartz monzonite...north of the Rocky Canyon intrusion along Rye Patch Agnes Canyon. Portions of the summers of 1938 and 1939...discussion and permission to examine the Rye Patch Agnes workings; and to Columbia University, for the award...prevailing dip being to the west. In Rye Patch Agnes Canyon, a roughly oval-shaped area of brownish rock |  | | Catalog/List | | limonitic gossan. 2x2". £3. 2. ANDREWSITE. Phoenix Mine, Linkinhorne, Cornwall. Light brownish yellow spherical...association. 2x1". £2. 3. ANGLESITE. Broken Hill, New South Wales, Australia. Fine small sharp semi-transparent...3ix2J2-". £7« 5. AZURITE. Tsumeb, Otavi, S.W. Africa. Deep blue sharp elongated crystals in parallel...7. BEUDANTITE. ^. — 11 8. BORNITE. Carn Brea Mine, Illogan, Cornwall. 1" group of large sharp tarnished...intergrown cubic crystals. £3- 9. BORNITE. South Caradon Mine, St. Cleer, Cornwall. A rich solid mass of |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, Johannesburg, South Africa Abstract. Mineralogical and geochemical evidence...complex metamorphic assemblages occurs around the mine, compared to the assemblages developed regionally;...no evidence of higher metamorphic grades at the mine, nor that this might have been the prime control...Renco mine in the Rhodesian Craton of Zimbabwe (c. 30t Au), and the Consort mine in South Africa (c. 50t... Gold occurs in schists and is associated with pyrite, and less abundant As, Fe, Sb, Mo and base metal-bearing |  | | Journal (article/letter/editorial) | | valence state. Sulfides (stannite, chalcopyrite, pyrite, arsenopyrite and sphalerite) and rutile associated...polymetallic Ag-base metal ores of the local Freiberg district (Erzgebirge, Germany) with a spectrograph...Erzgebirge/Krusné Hory; Far East Russia; SW England; South China Tin Belt) (Seifert, 2008; Cook et al., 2011c;...eastern Germany (skarn-type ores in the Pöhla district: Schuppan & Hiller, 2012; Bauer et al., 2017;...are related to the Variscan leucogranites of the South Armorican zone belonging to the ilmenite serie (Chauris | | | Journal (issue) | | Mowry Place Tucson, AZ 85741 Articles Gold in South Africa ..............................................Cairncross & C. R. Anhaeusser Minerals of the Linwood mine, Scott County,Iowa ..................... 231 by...and this must have introduced him to many other local mineral collectors and pos sibilities for further...of this typically natrolite covered material for local dealers as well as himself. He used much of this...in the still open underground workings of the Gem mine. He encountered an open pocket containing well formed |
|
