 | Buchholz, P., Oberthur, T., Luders, V., Wilkinson, J. (2007) Multistage Au-As-Sb Mineralization and Crustal-Scale Fluid Evolution in the Kwekwe District, Midlands Greenstone Belt, Zimbabwe: A Combined Geochemical, Mineralogical, Stable Isotope, and Fluid Inclusion Study. Economic Geology, 102 (3) 347-378 doi:10.2113/gsecongeo.102.3.347 | Journal (article/letter/editorial) | | Crustal-Scale Fluid Evolution in the Kwekwe District, Midlands Greenstone Belt, Zimbabwe: A Combined Geochemical,...The Kwekwe district comprises the central part of the Archean Midlands greenstone belt of Zimbabwe and...Sb-bearing stage 3. Four gold deposits within the Kwekwe district have been studied. The Primrose and Globe and...OVER THE PAST DECADE, the Archean Midlands greenstone belt of Zimbabwe has been subject to several research...in the central part of the Midlands greenstone belt, the Kwekwe district, has led to the discovery of |  | | Journal (article/letter/editorial) | | assemblages at the Viceroy Mine, Harare-Bindura-Shamva greenstone belt, Zimbabwe T. OBERTHÜR* AND T. W...2008] ABSTR ACT Gold mineralization at the Viceroy Mine is hosted in extensional veins in steep shear zones...liquid/melt-collecting mechanism was probably active at Viceroy Mine, where the distinct Au-Bi-TeS assemblage either...Archaean, Viceroy and Mazowe Mines, Zimbabwe, Passagem de Mariana Mine, Brazil. Introduction FOR a long...deposits. Well known examples are the classic mining district and type area of many telluride minerals, the |  | | Journal (article/letter/editorial) | | andtemperature.Thispart continues fosalts (pyrite, chalcopyrite, sphalerite,galena,and the studyand presentsa...id bs-tb,Au-cv, Te saturation Terziev (1966) Commoner, (1) hs-Au (2) at-cd-pz (3) sv-mn-rd-wssz-Te-ks...ga, ac po-py Hildebrand and Gott Colorado Zimbabwe Cripple Creek, Colorado E1 Indio, Chile cd*...cobaltitc,cc = chalcocite, co -- covellite,cp = chalcopyrite, ga = galena,gs= gersdorffite, id = idaitc,md=...greenstoneterranes, such as Kalgoorlie (Australia), Commoner (Zimbabwe), and the Abitibi belt (Canada),are not well |  | | Journal (article/letter/editorial) | | Telluride mineralization at Ashanti gold mine, Ghana R. J. BOWELL, R. P. FOSTER Department of Geology...5BD Abstract Gold mineralization at the Ashanti Mine occurs in shear zones which are second-order components...in the period between 1898 and September 1986 the mine produced 584 t (18.7 Moz) of gold from 25.9 million...9695 kg (311 721 oz) of gold (Suttill, 1989). The mine concession lies on a regional shear zone system...Phyllites, FIG. 2. Geology of a part of the Ashanti Mine Concession area (after Amanor et al., 1978). wards |  | | Report (issue) | | calaverite, krennerite, petzite, gold, pyrite, chalcopyrite, sphalerite, galena, pyrrhotite, tetrahedrite–tennantite...Colorado, at the Good Hope mine, Vulcan, Gunnison Co.; in the La Plata district, La Plata Co.; and at the...the Cresson mine, Cripple Creek district, Teller Co.; in California, at the Norwegian mine, near Tuttletown...Jamestown mine, Tuolumne Co.; in Nevada, at the Twin Creeks and Getchell mines, Potosi district, Humboldt...Outlaw mine, Round Mountain district, Nye Co.; and at the Gus Schave property, Olinhouse district, Washoe |  | Gebre-Mariam, M., Groves, D. I., McNaughton, N. J., Mikucki, E. J., Vearncombe, J. R. (1993) Archaean Au−Ag mineralisation at Racetrack, near Kalgoorlie, Western Australia: a high crustal-level expression of the Archaean composite lode-gold system. Mineralium Deposita, 28 (6) 375-387 doi:10.1007/bf02431597 | Journal (article/letter/editorial) | | banded, ore mineralogy of arsenopyrite, pyrite, chalcopyrite, sphalerite, galena, freibergite, tetrahedrite...Porphyritic basalt ~ Flow basalt / Fault [~ ~ Gold mine zopo~ z~oo~ / >~+++++iti~ ~ Andesite '~ ...a e r o m a g n e t i c data. Mine geology and structure In the mine environment, the stratigraphy is...zones, oriented 320-330~ ~ W, are common in the mine environment and, in places, have displaced the ore...(2#m to 5#m). Other sulphide minerals include chalcopyrite, Fe-poor sphalerite, tetrahedrite, tennantite |  | Bi, Shi-Jian, Li, Jian-Wei, Zhou, Mei-Fu, Li, Zhan-Ke (2011) Gold distribution in As-deficient pyrite and telluride mineralogy of the Yangzhaiyu gold deposit, Xiaoqinling district, southern North China craton. Mineralium Deposita, 46 (8) 925-941 doi:10.1007/s00126-011-0359-2 | Journal (article/letter/editorial) | | mineralogy of the Yangzhaiyu gold deposit, Xiaoqinling district, southern North China craton Shi-Jian Bi & Jian-Wei...predominant sulfide mineral, with minor amounts of chalcopyrite, sphalerite, and galena. Based on morphology...pyrite. The G3 pyrite, invariably intergrown with chalcopyrite, sphalerite, and galena, contains the highest...Mesozoic magmatic rocks widespread in the Xiaoqinling district and other parts of the southern North China craton...composed primarily of pyrite and lesser amounts of chalcopyrite, arsenopyrite, marcasite, pyrrhotite, and Zn–Pb |  | | Journal (article/letter/editorial) | | granites, e.g. those of the Matopos, Kalomo, and the Zimbabwe Ruins. I must mention, in conclusion, my obligations...inclusion of orthite in epidote. In granite, near Zimbabwe Ruins, Rhodesia. 12. Halo, about •04 mm. in breadth...bismuth and bismuthinite are also recorded from this district, as well as the mineral griinlingite, a variety...scheelite to wolframite, appears to be much the commoner. Fissure - reins at Grainsgill. — There occur...bunches of well-crystallized galena, with a little chalcopyrite. This vein has clearly been deposited in a fissure |  | | Journal (article/letter/editorial) | | in these veins include pyrite + magnetite + chalcopyrite + pyrrhotite. Magnetite close to the mineralization...Stage II veins are mainly pyrite, with trace chalcopyrite, galena, rare sphalerite, and molybdenite. The...cubic in shape and can be up to 1 cm in size. Chalcopyrite is anhedral and fills the interstices between...minerals (<∼5%) are cubic pyrite and anhedral chalcopyrite. The sulfate minerals, baryte and celestite...carbonate, sericite, native gold, tellurides, chalcopyrite, and pyrrhotite. The carbonate and sericite |  | | Journal (article/letter/editorial) | | rocks associated with the Carboniferous of the Midlands. That decomposed basic rocks appear in the Marls...that many basic rocks in the Carboniferous of the Midlands are extrusive ; they would thus be available,...the post-Carboniferous igneous activity in the district (see especially Scott in Gibson, 1925, p. 86)...may be more widespread in the sediments of the Midlands than records show (Fleet, 1925, p. 126). The analysis...is a local richness in pyrite (sometimes with chalcopyrite). This list is almost identical with that established |  | | Journal (article/letter/editorial) | | Formation (Ecca Group) near Muden in the KwaZulu-Natal midlands. Sedimentary structures in the sandstone units...have been re-evaluated in recent years, Klipwal Mine (near the Swaziland border) is the only presently...Figure 1. Location of Muden in the KwaZulu Natal Midlands northwest of Greytown on the R74 to Weenen and...shown by Figure 4, the small inclusions of the commoner heavy-minerals (heamatite, magnetite, pyrite,...epidote magnetite apatite xenotime galena pyrite chalcopyrite sphalerite cassiterite gold tantalite W Max |  | | Report (issue) | | for information concerning this important mining district. The area considered lies 30 to 35 miles west...the south, in the Georgetown quadrangle. As its commoner rock types are somewhat less resistant to erosion...one being traceable continuously from the Topeka mine, near Russell Gulch, northwestward for 4-J miles...radiate from a small bostonite area near the Topeka mine. Expansions of the dikes into narrow stocks occur...precious metals, represented solely by the Evergreen mine, near Apex; (5) titaniferous iron ores of Caribou |  | | Report (issue) | | INTRODUCTION. The silver ores of the Monte Cristo mine, near Wickenburg, Ariz., are of peculiar interest...of nickel or cobalt, whereas at the Monte Cristo mine the native silver crystallized nearly or quite contemporaneously...delayed by the war and other causes. The Monte Cristo mine is about 12£ miles by wagon road northeast of Wickenburg...Phoenix. No topographic maps of the district are available. In 1913 the mine was owned by Mr. Ezra Thayer,...high-grade ore and for numerous data concerning the mine. BEDROCK FORMATIONS. The prevailing country rock |  | | Report (issue) | | === Brucite, 6 cm, from the Killa Saifullah district, Balochistan, Pakistan. The Arkenstone specimen...little mines and prospects in the Killa Saifullah District, Balochistan Province, Pakistan. I have at least...brucite of yore from the Tilly Foster mine in New York or Wood’s Chrome mine in Pennsylvania. In that the new...suggests material found in 2005 in the N’Chwaning III mine in South Africa, but N’Chwaning brucite is graywhite...fine cerussite specimens from the old Monteponi mine, Sardinia, Italy, which Tomek Praszkier of Spirifer |  | Voicu, Gabriel, Bardoux, Marc, Jebrak, Michel, Crepeau, Robert (1999) Structural, mineralogical and geochemical studies of the Paleoproterozoic Omai gold deposit, Guyana. Economic Geology, 94 (8) 1277-1303 doi:10.2113/gsecongeo.94.8.1277 | Journal (article/letter/editorial) | | intheYilgam(Wiluna, Racetrack) andZimbabwe (Shamwa, Commoner) cratons. Introduction andesitic to basaltic...structural, textural,andminer- The rocks of the Omai mine consist of mafic and intermeby polygenic conglomerates...Las Cristinas ß' ' (Venezuela) AREMU PETER'S• MINE BARAMA-MAZARUNI ß . SUPERGROUP TRANS-AMAZONIAN...atthecontacts withwallrockinveins hosted by of chalcopyrite, gold,tellurides, galena, and,rarely,quartz...Primary wallobserved asinclusions in pyriteII. Chalcopyrite is usually a quently in alteredOmaistockandporphyry |  | | Report (issue) | | problems of handling the treacherous floods of hot mine waters and the problems involved in the struggles...under conditions most trying because of the high mine temperatures. Finally, the ores themselves being...Thomas McCormick, superintendent of the C. & C. mine, for a number of specimens of the richer ores, and...Consolidated mine, for other specimens and for the careful collection of a sample of the deep mine waters for..., Geology of the Comstock lode and the Washoe district: U. S. Geol. Survey Mon. 3, 1882. 8 Becker, G |  | | Report (issue) | | ........................................... R15 Mine Waste Characteristics........................................................................ R17 Mine Closure...........................................at the Kankberg deposit in the Skellefteå VMS district of Västerbotten County, Sweden. Combined, these...Bereznyakovskoe Mountains Kola Peninsula 45° Commoner Skouriés Kankberg 0° 180° Base from U.S....sulfides. At the tellurium-rich Cripple Creek district gold deposits in Teller County, Colorado, Lovering |  | | Journal (issue) | | CIRCULATION, SALES & FINANCE Jean C. Spence SADDLEBACK MINE Peter Briscoe • David McCallum • Paul Nicholson...Editorial Board. fEITKNECHTITE FROM BENALLT MANGANESE MINE Publication ofinformation on a collecting site...0952-2409 Tom Cotterell 49 NORTH DEVON UNITED MINE Mike Rumsey • Mike Savage 53 PIUNTING DY Ratcliff&...omwall, the mothballed , rkings of South Crofty Mine have prung to life and a new decline is being driven...way to the Highland and Islands. An ancient lead mine, which carves a conspicuous scar on the hillside |  | | Journal (article/letter/editorial) | | of block mountains is treated more fully. The district examined here is a very small one, the writer...assistance in the interpretation of this particular district. It would appear that the relief which the deformed...PRELIMINARY EEPORT ON THE ECONOMIC GEOLOGY OF HAZELTON DISTRICT, B.C. By J. J. O'NEILL. Department of Mines, ...amounts of chalcopyrite, with small quantities of gold and molybdenite. Part of the chalcopyrite has replaced...zincblende, tetrahedrite, argentiferous galena, chalcopyrite (in small quantities), with banded quartz and |  | | Journal (issue) | | ....................... 12 3 Lake City Mining District, Colorado. By David Seaman ........... 124 Club...being more or less characteris tic of a certah1 tin mine or group of mines. to ,vit: 1. Non nnl granite,...Granite, largely composed of mien , as in the Campaign Mine. 7. Granite containing considerable graphite. a...City Tin l\liner" of July 4, 1890) . In the Etta Mine of the Harney Peak Tin Company in 1890, I discovered...containing about 62% tin and 13% copper. In the same mine could be seen some of the world's largest crystals |  | | Book | | the Peak District 2 Mining and Quarrying 4 Ornamental Stone 8 Minerals of the Peak District 10 Selected...rather, millenia. For it is difficult in the Peak District to find a viewpoint that does not include a relic...ancient quarry face, sheep graze around a ruined mine head-gear and the rabbits scurry over a grasscovered...unless you are experienced, do not venture into old mine workings. That inviting adit may lead the unwary...mined in the area which now makes up the Peak District at least since the Roman invasion, and probably |  | | Journal (article/letter/editorial) | | subordinateor lacking. Other sulfidemineralspresent are chalcopyrite,sphaleriteand, in some cases,galena. This may...pyrrhotiteis the dominantiron sulfidemineral. Chalcopyrite and sphaleriteoccurin erratic amountsand proportionsto...Eastern Highland Belt of Australia and the Avoca district of Ireland in defininghis two types. It may also...normally,thoughnot always,subordinate in amountto chalcopyrite. It is clearlyseenthat the sphaleritesin this...any zinc production. The depositsare primarily chalcopyrite-pyrrhotite ores,with irregularand subordinateamountsof |  | | Journal (issue) | | rescue dig on the spoil heap of the Alva silver mine near Stirling. Remarkable specimens of dendritic...has taken place over many years concerning early mine working. Was the area worked for its copper either...Definite evidence of both Prehistoric and Roman mine workings on Engine Vein, at Alderley Edge, makes...postage rates). TQ11yBmw11e 10h11 CK Journal of Mine, & Mineral~ No. IS -4- Pearce THE MINERALIZATION...Distribution of old metal mines in the Llanrwst district. Based on Dewey & Smith ( 1922) with the geology |  | | Journal (article/letter/editorial) | | DEPOSITION AND ENRICHMENT AT THE EVERGREEN MINE, GILPIN COUNTY, COLORADO. D. H. • McLAu•m,IN....monzonite. The copperminerals,chiefly borniteand chalcopyrite,occurlargelyin two small• dikesand in the matrix...about sevenmiles east of the Continental Divide. The mine has beenoperatedin a small way fbr twelve yearsor...border of a large intrusion of monzonite." The mine was visited in the summer of •9•6 by the present...Copper Mine, Colorado," ECON.GEOL.,vol. 6, pp. 465--472,•9I•. ORE DEPOSITION .,'IT EVERGREEN MINE. 467 |  | | Journal (article/letter/editorial) | | primary or secondary occurrences of bornite,chalcopyrite,and chalcocite. Certaindifficultiesconnectedwith...vein rock, however, and a very careful searchof the mine dumpselimina.tedsomeof these difficulties. The...Hills mine; (2) the Eastern Carroll Countymines, comprisingthe Patapscomine, the Mineral Hill mine, and...'theFrederickCountymines, comprisingthe Liberty Mine, and the New London,or Linganore mine. DETAILED DESCRIPTIOBI OF ... MINES. Baltimore County Mine, Bare Hills Mine. The Bare Hills coppermine is locatedabout4 milesnorth |
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