 | | Journal (article/letter/editorial) | | in the oxidized Main Sulfide Zone, Great Dyke, Zimbabwe Marek Locmelis & Frank Melcher & Thomas Oberthür...Great Dyke mafic/ultramafic layered intrusion of Zimbabwe, economic concentrations of platinum-group elements...Beneficiation . PGE oxides Introduction The Great Dyke of Zimbabwe is a 2,575.4±0.7-Ma-old mafic/ ultramafic layered...cutting Archean granites and greenstone belts of the Zimbabwe Craton (Prendergast 1988; Oberthür et al. 2002)...from the base–metal refinery (Evans 2002). At Hartley Mine, the recovered grades of Pt and Pd from pristine |  | | Journal (article/letter/editorial) | | Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Thomas Oberthür Bundesanstalt für Geowissenschaften...Complex of South Africa and the Great Dyke of Zimbabwe. Samples were obtained underground, from core...Bushveld Complex, South Africa; the Great Dyke, Zimbabwe; the Stillwater grains, and they are ofthe subordinate...Bushveld Complex in South Africa, of the Sudbury district in Canada, and later Norilsk in Russia grand style...Bushveld Complex; South Africa; Great is Dyke; Zimbabwe; platinum-group minerals; Bushveld Complex in |  | | Journal (article/letter/editorial) | | Geikie (ed.), The Geological Structure of the North-West Highlands of Scotland. Mem. Geol. Surv. G.B. 456...Fell, Cumberland) is by A. W. G. Kingsbury and J. Hartley 1953, Mineral. May. 31, 296-7. Albertite (Morrison...Soc. London, 23, 3. Beraunite recorded from Roury mine, Glandore, Co. Cork (A. Russell 1923, Mineral. Mag...H. Church 1865, J. Chem. Soc. 18, 213. Botallack Mine, Cornwall. [A distinct mineral, but requires further...McLintock 1910, Mineral. Mag. 15, 413. Lizard district, Cornwall. [Botryolite = var. of Datolite (Hey |  | | Journal (article/letter/editorial) | | Creek Formation showsa marked thinningfromeastto west,is assigned a Lancefieldianage (Henderson,1983)...Queensland(Fig. 1), the Magpie prospectoccurs within the east-west-trendingSeventy Mile Range Group, the dismemberedremnantsof...fractureswhere Pb-Zn-Ag mineralizationoccursin Gregory and Hartley, 1982), Liontown (Levingston, somelocalities.Erratic...CROSS SECTION 1389 DRILL - 12300E (looking west) • ACID DYKES x;[•']APLITE/ACID PORPHYRY -50...zation producinga saccharoidaltexture. Cordierite- nontronite as a commoninterstitial product. Sericite pyrite |  | | Report (issue) | | skarns (Stormant) are known in the Moina Mining District, Tasmania, Australia, which is largely known for...Diamond, Iron Clad), and probably middle-Tertiary in West Sarawak, Malaysia (Bau) according to Wolfenden (1965)...sulfide(s)). Nontronite layers commonly interbedded with garnet skarn. The term "nontronite" is used as...secondary copper minerals (Torrey and others, 1986). Nontronite layers from some Au-bearing, calcic skarn deposits...metal-zoning relations constitute a local reversal of the district-wide zoning from Cu » Au » Ag, through Au + Ag |  | | Journal (article/letter/editorial) | | clay formation environments on Mars. Keywords: Nontronite, Mars, clay minerals, Columbia River Basalts...remotely sensed data from Mars. Several widely used nontronite mineral standards—including the nontronites of...The SWa-1 source clay has been widely used as a nontronite standard, but its unusually aluminous composition...basalt, saprolite, and paleosol samples, and a nontronite clay separate. For purposes of comparison, a...(oxyhydr)oxides rather than as Fe silicates. Nontronite clay, while typically found in the deep saprolite |  | | Book | | Redistribution in the Main Sulfide Zone of The Great Dyke, Zimbabwe T. Oberthür, F. Melcher 75-96 97-111 6. Placers...Systems: Refining the Classification Using McCreedy West Mine and Podolsky Project Case Studies 163-180 C.E...geochemical surveys M.L. Zientek, S.R. Corson, R.D. West 391-407 19. Exploration and Mining Perspective...Sulfide Zone of the Great Dyke, Zimbabwe - Case Study of the Hartley Platinum Mine A.H. Wilson, R.T. Brown ...REDISTRIBUTION IN THE MAIN SULFIDE ZONE OF THE GREAT DYKE, ZIMBABWE T. Oberthür, F. Melcher INTRODUCTION GEOLOGICAL |  | | Report (volume) | | • SPOKANE, Washington--U.S. Courthouse, Rm. 678, West 920 Riverside Ave .. • ANCHORAGE, Alaska--Rm. 101...complexly zoned garnets from oxidized skarn, Surprise Mine, Nevada 16 Ternary diagrams showing ranges of garnet...north-central Nevada 60 Chemical signatures of nontronite clay layers associated with gold-bearing skarns...of Pegasus Gold Corporation; Larry Hillesland of West Introduction gold grade of 1 g/t or higher are...Myers and Meinert, 1988). At Copper Canyon, the West ore body is an Au-bearing Co-skarn that formed adjacent |  | | Journal (article/letter/editorial) | | - y s t . Min., 1895, 24, 613-614).-1n the coal mine Konigin Luise, Pachtfeld, near Zabrze, in Upper...25.35-45.14 Fe,O, per cent. I n a note by W. N. Hartley it is stated that there were no black specks, bnt...given under 11. L. J. S. [Forsterite, Hornblende, Nontronite, Batavite, and G a r n e t from Bavaria.] By...cent. which mas unattacked by hydrochloric acid. Nontronite occurs in the syenites as a decomposition product...scaly decomposition product which occurs with the nontronite and with kaolin. It closely resembles nacrite |  | | Journal (article/letter/editorial) | | Bindheimite : Cornwall, anal., 664 ; bismuthiferous, South-West Africa, anal., X-ray, 664 Biotite: South Harris...hypothesis, 63 DREVER (H. L), Rocks from Ubekendt Ejland, West Greenland, xliv DVFFIN (W. J.) & GOODYEAR (J.),...xliv; scheelite from Devonshire, lxxviii - - & HARTLEY (J.), Carminite & beudantite, 423 see SWEET (J...Rhodesia, 87 --& CLIFFOI%D (T. N.), Monazite from South-West Africa, 650 - - & Cox (K. G.), Kennedyite, 676 -...South Harris, opt., spectr, anal., 368, 370; South-West Africa, opt., anal., 650 Montmorillonite : Argentina |  | | Journal (article/letter/editorial) | | titanomagnetite, and apatite. Secondary coatings of nontronite clay in the deep saprolite display intricate... The primary Fe-containing phase shifts from nontronite in deeper samples to hematite in shallow samples;...the boundary contain the assemblage kaolinite + nontronite, which may mark the transition from permeability-limited...(+kaolinite). These results suggest that the presence of nontronite in weathered samples may indicate weathering...conditions in the planet’s ancient past. Keywords: Nontronite, basalt weathering, EXAFS, XANES Introduction |  | | Book | | Gertisser, Peter Golley, David Green, Alan Hart, Jack Hartley, John Holbrook, Nigel Hoppe, Jana Horak, Mike Howe...meneghinile Pengenna mine,St Kew,Cornwall; Shallowfield Bridge,SouthMolton,Devon Tynebottom mine,Alston.CUm~ria...CUm~ria mercury Chatsworth mine,Grassinglon, Yorkshire Severallocalities in theLakeDistrictandComw melacinnabar...theLakeDistrictan:iCorrr::a!I natrojarosite Wanlhwaite mine,StJohn'sin theVale,Cumbria SouthTerrasmine,StStephen-in-Brannel...Cumbria pharmaco!ite Wanlhwaite mine,StJohn'sin theVale,Cumbria Chatsworth mine,Grassington, Yorkshire p:cropharmacolne |  | | Report (issue) | | mineralization is from approximately 0.8–1.1 km (West and Aiken, 1982). At Bingham, Utah, the greatest...fluids in the Yerington, Nevada, porphyry copper district and concluded that an aqueous fluid, rich in sodium...changes in neodymium-strontium-lead ratios from west to east have also been found (Haschke and others...enrichment near the base of the weathering zone (Hartley and Rice, 2005). Primary rock composition and postmineralization...copper-bearing mineral assemblages at the Lakeshore mine in Arizona, as follows: chalcocite zone, brochantite |  | | Journal (article/letter/editorial) | | 21P/Giacobini-Zinner (Mumma et al., 2000), and 103P/Hartley (Crovisier et al., 2000), suggests that comet interiors...69P/Taylor 73P/SchwassmannWachmann 78P/Gehrels 103P/Hartley a We find the silicate band strength to be pre-Deep...24–1.28. The silicate band strength of comet 103P/Hartley (1.20) measured by Crovisier et al. (2000) requires...for comet 103P. Finally, the observation of 103P/Hartley by Lynch et al. (1998) requires a minor correction...n (Harker et al., 2006b), and, possibly, 103P/Hartley (Crovisier et al., 2000), have detections of crystalline |  | | Book | | Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Reprinted from: Minerals 2018, 8, 581, doi:10...PGM from China, Russia, South Africa, USA, and Zimbabwe are reported. In his contribution, Oberthür [3]...ite vein-disseminated ores from the Komsomolsky mine of the Talnakh and Oktyabrsk deposits, Noril’sk...bushveld complex, South Africa, and Great Dyke, Zimbabwe. Minerals 2018, 8, 581. [CrossRef] Stepanov, S...minerals in the chromitites of the Kokkinorotsos chrome mine, Cyprus. In Ophiolites, Proceedings of the International |  | | Book (edition) | | Mineral Descriptions Molybdenite in Graphite; Bogala Mine, Sri Lanka 51 Copper, native Synonym(s): Cuivre...of cuprite (bluish grey); North Mine (North Broken Hill Mine; NBH Mine), Broken Hill, Yancowinna Co.,...vein in jasper (red internal reflections); Madenköy Mine, Çayeli, Rize Province, Black Sea Region, Turkey...argentite reaction rim (greenish grey; arg); Monte Narba Mine, San Vito, Cagliari Province, Sardinia, Italy; PPL...matrix (dark grey); Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Sachsen, Germany |  | | Journal (issue) | | No 4. Bournonite, Herodsfoot Mine, Lanreath Specimen: 55 x 70 x 55mm Watercolour commissioned for...magnesite plates, a 24 x 18mm specimen from Boulby Mine, Cleveland (seearticle in this issue). David I....and photo. SOUTH CROFTY MINE ------------- 4 BORATE NODULES from BOULBY MINE DI Green· MD Freier 8 ...special issue, Minerals of the Peak District, jointly with the Peak District Mines Historical Sociecv, che...Cornwall and Devon, the Lake District, the Caldbeck Fells and the Peak District. Richard Bevins' ~1ineralog) |  | Daux, Valérie, Guy, Christophe, Advocat, Thierry, Crovisier, Jean-Louis, Stille, Peter (1997) Kinetic aspects of basaltic glass dissolution at 90°C: role of aqueous silicon and aluminium. Chemical Geology, 142 (1) 109-126 doi:10.1016/s0009-2541(97)00079-x | Journal (article/letter/editorial) | | Beidellite-Na Beidellite-Mg Nontronite-Ca Nontronitt-K Nontronite-Na Nontronite-Mg Montmorillouite-Ca Montmorillonite-K...materials. Acknowledgements We would like to thank J. Hartley and R.W. Nesbitt for helpful comments. We are also |  | | Book | | Pllhlisiled ill the USA h)' Chapman (Iml Hall 29 West 35th Street, ,\Iou York ,\IY1O()() I © 1986 R....reasons for the approach taken Mineral deposit or mine? A genetic model as the basis for exploration The...many geologists who have given their time during mine visits and responded to our queries. We have benefited...Decline Doline A downward inclined tunnel into a mine or potential ore body. A funnel-shaped depression...shaft excavated upwards for connecting levels in a mine or ore body. Ripping The removal of overburden |  | | Journal (article/letter/editorial) | | weathered to kaolinite-halloysite or to beidellite-nontronite; then, gibbsite and bauxite formed from these...a glassy groundmass that weathered easily to nontronite provided zones of increased permeability and...orogeny, it formed a part of the hinterland on the west side of the Rocky Mountain geosyncline. Acting as...batholith was broken by minor low-angle thrusts of west-northwest trend and southwest (exceptionally northeast)...Idaho. TUNGSTEN MINERALIZATION AT THE IMA MINE, BLUE WING DISTRICT, LEMHI COUNTY, IDAHO ALFRED L. ANDERSON |  | | Book (edition) | | passes upwards into more felsic dolerites. On the west the body is transgressive and near the roof granophyres...Sears and K. J. Heinrich. Olivine tholeiite, North west of Tabulam, N.S.W. Anal. G. I. Z. Kalocsai. Olivine...anorthoclase and albite-oligoclase in the Kalbar district of southern Queensland and this, and an oligoclase...Romsey district, along the banks of the Campaspe and Coliban rivers, in the Gisborne district north of...MAGMA examples are found 69 in the Kalbar district.*' In New South Wales these rocks are recorded |  | | Journal (issue) | | Bariand Paris, France Werner Lieber Heidelberg, West Germany Olaf Medenbach Bochum, Germany Eric Offermann...York circulation manager Articles The Boltsbum mine, Weardale, County Duiham, England ................ Bariand Arsenate minerals of the Sterling Hill mine: an overview .....................................BERYL crystal, 7 cm tall, from the Virgem da Lapa district, Minas Gerais, Brazil. Sorbonne collec tion,...The Mineralogical Record Jan uary-February, 1982 mine Weardale, CpuntyJ)urham, England t h e B o l |  | | Journal (issue) | | COVELLITE crystal cluster, 3 cm across, From the Leonard mine, Butte, Montana. Frederick H. Pough collection;...the Butte mining camp, especially in the Kelley mine, was just full of vug holes . . . the holes, some...located in Butte, at the site of the old Orphan Girl mine. . . . So wrote a trainee miner, Jerry Dolph, concerning...an underground stope at Butte, Montana’s Kelley mine in the early 1970’s (Dolph, 1994). The wonderful...only comprehensive mineralogical study of the district. This work is as valuable today as it was 37 years | | | Report (issue) | | 3): Michalski et al. [2010] [10] analyzed the nontronite deposits in the Nili Fossae region using TES...spectral features showing the occurrences of nontronite in the longwavelength region. Instead, TES data...NIR spectral bands (1.9, 2,3, and 2.4 μm) of nontronite [10, 11]. This leads us to investigate whether...The surface “on deposit” was determined to be nontronite-bearing based on CRISM and OMEGA data [10, 11]...that also included spectra of thermally altered nontronite (at 400 °C) acquired by Che and Glotch [2011] |  | | Book | | layered igneous complexes 8.2.1. The Great Dyke, Zimbabwe 8.2.2. The Bushveld lgneous Complex, South Africa...lithosphere subducting beneath South America and the west Pacific, showing as fast (and therefore cold) regions...Karoo province in the Transvaal (South Africa) and Zimbabwe areas in southeastern Africa, are the result of...Byrd Land is a dome structure associated with the West Antarctic rift system, and the timing and magnitude...African continent, promoting the growth of jungles west of the divide and savannahs to the east (Coppens |
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