 | | Journal (article/letter/editorial) | | Sector of Mashava Igneous Complex in south central Zimbabwe from an investigation of its silicate minerals...Sector of Mashava Igneous Complex in south central Zimbabwe from an investigation of its silicate minerals...Sector of Mashava Igneous Complex in south central Zimbabwe from an investigation of its silicate minerals...economically important Mashava Igneous Complex (MIC) in Zimbabwe was conducted using petrographic and silicate...Amphiboles display a wide range in composition from tremolite and actinolite which are both consistent with |  | | Report (issue) | | interest in the geo logy and mineral resources of Zimbabwe which followed the removal of United Nations sanctions...original Bulletin is the insertion of Table IIIA, Zimbabwe Mineral Production and Value, on page 114A. Due...for views of Wankie Colliery and the Trojan nickel mine, and to the Photographic Section of the Ministry...near Salisbury. facing page 23 IV Trojan Nickel Mine, near Bindura. facing page 33 V The Great Dyke...Complex. VI Chrome seam in the Great Dyke, Vanad Mine. VII Lower Karoo Landscape. No. 1 Colliery, Wankie |  | | Journal (article/letter/editorial) | | data of BIFs from the greenstone terranes of the Zimbabwe and Kaapvaal cratons. The study revealed that...geochemistry of some BIF-hosted gold deposits in Zimbabwe and considers mineralogical and geochemical aspects...greenstone belts of the Kaapvaal and the adjacent Zimbabwe cratons (Fig. 1). The two cratons are separated...previously (Fripp 1976, Fos- S 126 BROOMSTOCK MINE _~7-" ZIMB,ABWE CRATON Distribution of ] ore zones...GREENSTONE B E L T 11 f 11 1) Chinhoyi 2,3) Midlands Johannesburg | ~ aput~ /lI (~4~_ 4) Shurugwi |  | | Journal (issue) | | Shepherd, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North West - 1 . Knight, Scottish...and Burke, E.AJ., 1998. Emeralds from Sandawana, Zimbabwe: the use of Raman microspectroscopy in identification...other countries (e.g. Brazil, Russia, Zambia, Zimbabwe-Sandawana, Afghanistan and India) crystalline...and China. Eleven single crystals from Heffernan's mine, Torrington, New South Wales, Australia, five from...Locality Sample numbers Australia: Heffernan's mine, Torrington, NSW Size Colour Morphology 1-11 |  | | Journal (issue) | | Velden D. Warren C.H. Winter, FGA Branch Chairmen: Midlands Branch: D.M. Larcher, FBHI, FGA North-West Branch:... 22, 5 'Machingwe': A new emerald deposit in Zimbabwe Jan Kanis*, Charles E.S. Arps** and Pieter C....in the Mweza Range Greenstone Belt of southern Zimbabwe are discussed and compared with data from Sandawana...visit to a newly discovered emerald occurrence in Zimbabwe, named 'Machingwe deposit', thanks to the kind...assistance of the Mineral Marketing Corporation of Zimbabwe. This Corporation is a state controlled department |  | | Journal (issue) | | Read, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North West - I. Knight, Scottish...Australia (Hockley et al, 1978) and the Jordonow district, Poland (Heflik, 1968). Para-nephrite jade of...inclusions are uncommon but include epidote, tremolite and pyrite. As well as those of South Australia...serpentine silica = 3Ca2Mg5Si8022(OH)2 + 7H 2 0 tremolite or by reconstitution of impure sedimentary dolomite...Ca 2 Mg 5 Si 8 0 22 (OH) 2 + 3CaC0 3 + 7C0 2 tremolite calcite 203 197 Table I: Chemical analyses |  | | Journal (issue) | | Shepherd, R Velden, CH. Winter Branch Chairmen Midlands: J.W. Porter North West: 1. Knight Examiners...mines is on the right bank of the Oxus, in the district of Ish Kashrn and on the borders of SHIGNAN, the...RUBY Persian: lot; HINDU: manik? or lal. T h e mine of this gem was not discovered until after a sudden...mines are within twenty miles of Ishkashm, in a district called Gharan, which word signifies caves or mines...are greatly incommoded by water filtering into the mine from above, and by the smoke from their lamps, for |  | | Journal (issue) | | Read, R Shepherd, CH. Winter Branch Chairmen: Midlands ~ G.M. Green, North West -I. Knight, Scottish...areas) and drainages, Pailin district, Figure 2: Distribution district, continuous lines, with with gem-barren...and 7.9.3 member compositions). Thailand (Rubywell Mine) alluvial sapphirines (T) and NSW granulite-hosted...Gunawardene, M., 1985. Peridot from Ratnapura District, studies on crystallized silicate melt and other...of the year. In general about 30 people work each mine using picks and shovels, but at some, such as at |  | | Journal (issue) | | Nelson, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North East - N. R. Rose, North West...and comments on the exploration potential of the district. © Gemmological Association and Gem Testing Laboratory...Monte Bianco Domenico Pass Libiola Hill Gallinaria Mine (Casarza Ligure) Casa di Bonelli (Monte Tregin)...the nephrite jade consists of microcrystalline tremolite-actinolite that is intimately associated with...to a lesser extent talc. The majority of the tremolite-actinolite shows incipient preferred orientation |  | | Journal (issue) | | Shepherd, P.J. Wates, CH. Winter Branch Chairmen: Midlands - G.M. Green, North West - 1. Knight, Scottish...October 1998 ISSN: 1355-4565 Blue euclase from Zimbabwe—a review Susan Stocklmayer (née Anderson), FGS...ABSTRACT: Blue euclase from Mwame, Hurungwe District, Zimbabwe, which was first collected in the late 1970s...photomicrographs. Keywords: euclase, inclusions, pegmatite, Zimbabwe Euclase in Africa Introduction 174 uclase...from sources in Colombia, Russia, Tanzania and Zimbabwe; spectacular crystals have been described from |  | | Journal (issue) | | A. W. Hodgkinson C. H. Winter Branch Chairmen: Midlands Branch: C. L. Hundy, F.G.A. North-West Branch:...Franks, B.Sc., Ph.D., F.G.A. South Yorkshire & District Branch: J. I. Platts, F.G.A. Examiners: A. J....Fluid inclusions Feathers of Fe-oxide Siderite, tremolite/mica c...., ~ o-.J VI F ~><: J3 a a ...and, in rare cases, mica flakes, talc and fibry tremolite inclusions.The small grain size of good quality...discovery of blue beryl from Karakar granite, Buner, district Swat, (in preparation). Gübelin, E. J. (1982): |  | | Journal (issue) | | D. Warren C H . Winter, FGA Branch Chairmen: Midlands Branch: D.M. Larcher, FBHI, FGA North-West Branch:...large rubellite crystals were found in the pegmatite mine at Sakangyi. Furthermore, Bauer (Spencer transi...result of a several weeks stay at Matara, which gem district he visited in response to an urgent request for...Belligam. He also noted that zircons of the Matara district receive the name "Matara diamonds" for their finest...Hypotheses of of emerald genesis B3. The workings T h e mine workings Gemmological Gemmological properties (Part |  | | Journal (issue) | | Read, R Shepherd, CH. Winter Branch Chairmen: Midlands - G.M. Green, North West - I. Knight, Scottish...China ABSTRACT: The turquoise deposit in Yunyang district, Hubei Province, China, is characterized by its...turquoise and its irregular occurrence in this district have attracted little attention from the Government...investigation into the turquoise mineralogy in this district and on the basis of this it was evident that more...(80-85%), carbonaceous material quality of this district are all controlled by the (10-15%), sericite (3-5%) |  | | Journal (article/letter/editorial) | | nrichment, whichis,in turn,overlain bya tale-tremolite alteration zonelocally.Siliceous baritezonesareabsent...Lowerpyroclasticunit of thePersimmonFork Formation Mine. Dom,Jennings, Searles, Searles (pigfarm),CivilWar...andaluminosilicate mines intheLincolnton-McCormick district. Geology adapted inpartfrommapping byParis (1976a)...fromHatcher(1978),Hortonet the Lincolnton-McCormick district from which small Cormick (1991),Horamounts of...Survey, unpub.data,1994)indicate thatthe Barite Hill mine between1990 and 1994 (D. W. Halverson, U.S.Geologica |  | | Corporate Document | | calcite - chlorite - epidote pyrite - rutile - tremolite-actinolite - tourmaline - tellurides(?) - gold...ore" was extracted and treated at the Pahtavaara mine plant (Markku Kilpelä, pers. comm. 1999). The deposit...Cu (Korvuo 1997). The total production from the mine is 6279 kg Au and 5177 t Cu (Korvuo 1997, Reijo...rutile - pyrite. 2.2.3 Pahtavaara The Pahtavaara mine is located 25 km NW from the town of Sodankylä in...Sattasvaara metakomatiite complex (Korkiakoski 1992). The mine was active in 1996-2000 and was reopened in October |  | | Report (issue) | | Carolina. The deposit is in the Lincolnton-McCormick district, which includes other mines and prospects for...2) and block diagrams (pi. 3) of the Barite Hill mine to supplement a brief summary of the geology of...enrichment, which is, in turn, overlain by a talc-tremolite alteration zone. Siliceous barite zones are absent...McCormick area, McCormick County, South Carolina: Athens, Georgia, University of Georgia, unpub. M.S. thesis...1/2-minute quadrangle, South Carolina-Georgia: Athens, Georgia, University of Georgia, unpub. M.S. thesis |  | | Journal (issue) | | Read, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North West - I. Knight, Scottish...and rare accessory constituents of diopside, tremolite, epidote, chlorite, zoisite, pyrite, hematite...nephrite jade production in the Jordanow Slaski district appears to have commenced in Neolithic times....of the regional geology of the [ordaruno Slaski district. J. Gemm., 2001, 27, 8, 461·470 western Europe...references to nephrite jade in the Jordanow Slaski district may be discerned in various 18th-century manuscripts |  | | Journal (issue) | | Nelson, P J Wates, C H Winter Branch Chairmen: Midlands - C M Green, North East - N R Rose, North West...structure arranged as follows: (1) mica zone, (2) tremolite-actinolite zone, (3) talc zone, and (4) core zone...have been found in glacial deposits in the Vantaa district on the northern outskirts of Helsinki. Specimens...appear restricted to lensoid bodies of massive tremolite that have developed within a skarn assemblage...one of these historical sites, the Stansvik iron mine, was first reported by Lindqvist and Kinnunen (1985) |  | | Journal (issue) | | Shepherd, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North West - 1 . Knight, Scottish...alexandrite from from the the Hematita Hematita mine mine in in Brazil Brazil (AL-HEMA1), (AL-HEMA1), an...alexandrite from from the the old old Tokowaja Tokowaja mine mine in in the the Ural Ural Mountains Mountains (AL-U/K9456)...— • CL-SPECTRA OF ALEXANDRITES RED-NEW MINE GREEN=GLD MINE URAL. RUSSIA. BLACK-SYNTH. MASTERSTONE ALEX...alexandrites: 1. Dash-double dotted green curve - Hematita mine, Brazil; 2. Dash-dotted green curve - Sri Lanka; |  | | Journal (issue) | | Read, P.J. Wates, C.H. Winter Branch Chairmen: Midlands - G.M. Green, North West - D. M. Brady, Scottish...networks observed in quartzes from the Ratnapura District, Sri Lanka, are explained by the presence of up...inclusions. Previously described as byssolite (tremolite-actinolite-amphibole), powder X-ray diffraction...include the alluvial deposits of the Sissersk District and the Bobrovka River, both of the central Ural...matrix-support mineral for samples from Val Malenco was tremolite-amphibole. A report of chrysotile Horse-tail |  | | Report (issue) | | each country having a major chromite deposit or district--------------------------------7. By economic...especially South Africa and Zimbabwe. • Eight industrialized countries4 that mine little or no chromite have...chromium (in the form of ores, 3 A captive mine is a mine that produces solely for the parent company...profit-motive criteria would normally result in mine closure. Chromite supplies have been disrupted....some countries halted imports from Rhodesia (now Zimbabwe). Chromite and ferrochromium stockpiles have been |  | | Journal (issue) | | Warren c.n. Winter, FGA, DGA Branch Chairmen: Midlands Branch:D.M. Larcher, FBHI, FGA, DGA North- West...occurrence of some pink-brown diamonds from the Argyle mine (see Hofer, 1985), the presence of red (or pink)...jadeite has been converted to tremolite/actinolite. The actinolite and tremolite are of fibrous, acicular...optical sign is negative with 2V=79° to 85°. Tremolite is white in colour while actinolite is green in...stages of replacement of jadeite by actinolite/tremolite can also easily be observed J. Gernrn., 1993 |  | | Journal (article/letter/editorial) | | 1910). At one time, jasper was mined at the Parrot mine (Chittenden Co.) on a small scale for use in colorful...srontianite? talc tennantite-tetrahedrite titanite tremolite uvarovite valeriite vesuvianite wad washingtonite...on frac ture surfaces), "mountain leather," tremolite. Monkton orebeds south of East Monkton: kaolinite...limonite, wad. Bennington County Bennington manganese mine in Bennington: wad. Mount Anthony Formation (Mount...Formation in Bakersfield: albite. Vermont and Boston mine in Berkshire: azurite, bornite, chalcopyrite, malachite |  | | Journal (article/letter/editorial) | | omitted from locality information. Where lot and district numbers are given, it is necessary to use topographic...the photographs. Baldwin County Milledgeville district—between the State Sanitarium and the Oconee River:...property—near Commerce: ferrocolumbite (Cook, 1978). Lula district—Standridge property, about 7.0 km east of Lula:...Calgary] at 09:55 07 August 2017 Barrow County Arnold mine—1.6 km northeast of Statham, near the head quarters...(chryso lite, olivine) (Teague, 1956). Jefferson district—9.7 km southwest of Jefferson on S.R. 11, northwest |  | | Journal (issue) | | Shepherd, R Velden, CH. Winter Branch Chairmen Midlands: J.W. Porter North West: 1. Knight Examiners...is monomineralic consisting almost entirely of tremolite, whereas the poor-quality nephrite is polymineralic...Ch'unch'on). Annual production of the nephrite mine (the Daeil Mine) is reported to be approximately 80 000-90...map of nephrite mine area, Chuncheon, Korea. Occurrences The geology of the nephrite mine area consists...essentially of tremolite in the form of aggregates of minute fibres (Figure 4). Tremolite aggregates are |
|
