 | | Journal (article/letter/editorial) | | manganese ores of the Postmasburg manganese field, South Africa J. GUTZMERAND N. J. BEUKES Department of Geology...University, P.O. Box 524, Auckland Park, 2006, South Africa Abstract The diagenetic to very low-grade metamorphic...Transvaal Supergroup, manganese ore, Postmasburg, South Africa. Introduction TIlE manganese ores of the Postmasburg...ferruginous ores of the Westem Belt and siliceous ores of the Eastern Belt (Fig. 1B). Ferruginous ores form...Lohatlha and Gloucester in the central part of the Western Belt (Fig. 1B). Siliceous ores occur locally in the |  | | Journal (article/letter/editorial) | | Gloucester Mine Gamagara Hills Postmasburg Manganese and Iron-Ore Field South Africa BRUCE CAIRNCROSS...PO Box 524, Auckland Park 2006 Johannesburg, South Africa brucec@uj.ac.za T he Postmasburg manganese...of mineral specimens that are found in these two South African mining regions. However, Postmasburg does...claim to mineralogical fame if the manganese-rich diaspore from the Lohathla, Glosam, and Gloucester mines...Map showing the Gloucester mine and Gamagara Hills in South Africa, prepared by William Besse. other |  | | Journal (article/letter/editorial) | | THF,Postmasburg manganese field,situated in the Northern replacement of the countryrockbymanganeseCapeProvince...in twodistinctbeltsof deposits, the so-called Western Trnter et al., 1938; De Villiers, 1960; Boardman...In contrast Schneiderh6hn (1931)suggested in the south(Fig. 1). Miningof the manganese orescom- Borchert...ng AnalyticalTechniques the centralpartof the Gamagara ridge.Siliceous oresoccur in the Easternbelt alongthe...southernextremitiesof the Gamagara manganese oresamples, covering all macroscopically distinct ridge (Fig. 1; Hall |  | | Journal (article/letter/editorial) | | deposits of the Postmasburg manganese-field, South Africa E. von Plehwe-Leisen, D.D. Klemm Department...r t h e r n C a p e P r o v i n c e / S o u t h Africa. T h e y are a s s o c i a t e d to a geological...are distinguished: the E a s t e r n Belt, the W e s t e r n Belt a n d the M i x e d T y p e (Fig. 2)...of the E a s t e r n Belt. T h e m a n g a n e s e ores of the W e s t e r n Belt are younger. T h e M...occurring in distinct regional belts (Eastern and Western Belt) are small and irregular in size, shape and |  | | Journal (article/letter/editorial) | | THE MANGANESE DEPOSITS SOUTH ALEX. I933 No. :2 . OF POSTMASBURG, AFRICA. L. DU TOIT. CONTENTS...1922, and are situatedcloseto Postmasburg in the Cape Province (Lat. 28ø 20' S.; Long. 23ø 04' E.) some...ownsand hastestedthe southernpart of the Eastern Belt, but has not yet exported; it possesses huge depositsof...DEPOSITS OF POSTMASBURG. 99 B. Matsap System (Gamagara Beds)--probably early Palaeozoic. 4. Pale quartzites...feet on Doorn Put, but over a gooddeal of the Western Belt, saveat either end, it is presentas mere remnants |  | Fairey, Brenton J., Timmerman, Martin J., Sudo, Masafumi, Tsikos, Harilaos (2019) The Role of Hydrothermal Activity in the Formation of Karst-Hosted Manganese Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa. Minerals, 9 (7) 408 doi:10.3390/min9070408 | Journal (article/letter/editorial) | | Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa Brenton J. Fairey 1,† , Martin J...Geology, Rhodes University, Grahamstown 6139, South Africa Correspondence: h.tsikos@ru.ac.za Current address:...Postmasburg Manganese Field (PMF), Northern Cape Province, South Africa, once represented one of the largest...the PMF, namely the Western Belt of ferruginous manganese ores and the Eastern Belt of siliceous manganese...Postmasburg manganese field; hydrothermal; karst; South Africa Minerals 2019, 9, 408; doi:10.3390/min9070408 |  | | Journal (article/letter/editorial) | | 0861-0128/88/192/1108-1152.50 Mn DEPOSITS, SOUTH AFRICA 1109 Geologic Framework .• •:•:•:•:•:•:•:•:•:•...Stellenbosch). 1110 j. E. DE VILLIERS proximatelynorth-south,and regionalshearingand (includingmetamorphic deposits)...general to be justified,exceptionsto this along a belt which extendsfor about 180 km from schemeare found...Morocco,for instance,hausmanniteand janekke,70 km south-southwest of Postmasburg. It was cobsiteoccurin...transforms to bixbyiteat 600øC,pyrolusiteto bixbyite in Gamagara rocks where they are underlain by at 510øC, bixbyite |  | | Book | | 2. Model Test Area: Moanda Deposit, Gabon, West Africa 2.2.2.1. Introduction 20 20 23 23 23 25 25 27...Postmasburg Region, Griqualand West, Cape Province, South Africa 3.3.1. Geological Setting 3.3.2. Genesis...Manganese Ore Formation Manganese Ore Deposits of North Africa: Imini, Morocco 3.4.1. Geological Setting 3.4.2...of the Western Ukraine 3.5.2. Zone of Oxidation and Karst Ore Accumulation of the Enisei Ridge Mn Deposits...ancient glaciers, and the glaciation epoch of the northern countries - in Scotland, in Scandinavia, in Finland |  | | Report (issue) | | varying amounts of andalusite, massive topaz, ani diaspore have been identified in associaticn with pyrophyllite...occurrence of kyanite, massive topaz, andalusite, and diaspore with pyrophyllite deposits in North Carolina....County, and reported it to contain 56 percent diaspore<> This mineral was identified by the writers...series at the Brewer Mine, Chesterfield County, South Carolina, in 1925 • It was not found in quantity...desirable material used for hightemperature purposes. Diaspore is a hydrous aluminum oxide, which loses its |  | | Journal (article/letter/editorial) | | zone in northern Vietnam that has been known as the Paleogene high–temperature metamorphic belt. The rock...during the collision between the Indochina and South China blocks. Keywords: Metamorphosed bauxite, Eclogite–facies...kyanite + corundum from the Red River shear zone in northern Vietnam. We investigated the protolith of the...assemblages, metamorphic grade in the western belt is lower than the eastern belt. GEOLOGICAL OUTLINE The Red...Red River shear zone runs from northern Vietnam to southeastern Tibet. It is more than 1000 km long, and |  | | Book | | comfort. Users of chromite, who must the USSR, South Africa, Albania, and wish that chromite deposits were...Republic of South Africa by the Department of Mines and the Geological Survey of South Africa; such profiles...Greece to Czechoslovakia, Mexico to Canada, South Africa to Jordan, and Australia to Sri Lanka. Industrial...from the initial letters of Asbestos Mines of South Africa, is an ash gray or brown material with vitreous...(Mann, 1983). nia; the USSR; the Italian Alps; New South Wales, Austral- ia; Cyprus). (2) Stratiform ultramafic |  | Mitchell, Andrew H. G., Myint, Win, Lynn, Kyi, Htay, Myint Thein, Oo, Maw, Zaw, Thein (2011) Geology of the High Sulfidation Copper Deposits, Monywa Mine, Myanmar. Resource Geology, 61 (1) 1-29 doi:10.1111/j.1751-3928.2010.00145.x | Journal (article/letter/editorial) | | magmatic arc through western Myanmar. There are four deposits; Sabetaung, Sabetaung South, Kyisintaung, and...000 t copper cathode from Sabetaung and Sabetaung South. Ore is hosted by mid-Miocene andesite or dacite...up to 30% Cu, and much of the ore at Sabetaung South is in a NE-trending zone of mega-breccia and stockworked...the Chindwin River in western Myanmar (Fig. 1). The district is on the northern margin of Myanmar’s dry...district: the almost contiguous Sabetaung, Sabetaung South and Kyisintaung deposits and the much larger Letpadaung |  | | Report (chapter) | | strike parallel to the north–south trend of the ranges. Zone 3. Western Inner–Myanmar Cenozoic Basin...fluviatile sedimentary rocks. Zone 4. Central Volcanic Belt (or Line), a magmatic-volcanic arc composed of Pleistocene–Recent...tectonic zones as occurring in three north–south belts. The Eastern Belt in the far east of Zone 6 are Triassic...continuation of the Triassic I–S-type granites of northern Thailand (Cobbing et al. 1992). U–Pb SHRIMP dates...dates of igneous zircons from the Central Belt (western margin of Zone 6) range in age from Jurassic through |  | | Book (edition) | | OF OF SOUTH AFRICA MINES GEOLOGICAL SURVEY MINERAL RESOURCES OF REPUBLIC OF THE SOUTH AFRICA...Second World War, and partly as a result of it, South Africa experienced vast industrial expansion. This...official ‘handbook on the mineral resources of South Africa, it has become necessary to revise, or rather...reason of the great diversity and magnitude of South African mineral deposits and local mining operations...Chamber of Mines of South Africa with Mr G. H. Grange as co-ordinator, and the South, African mining industry; |  | | Book (volume) | | Papers and Discussions Volume I , I JOHANNESBURG SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY 1961... 01", ~TALLUf>iYY. © Copyright 1961 by The South African Institute of Mining and Metallurgy Ext'racts...I (1v DEC 196f Printed in t!te Republic of South Africa by Hortors Limited, Johannesburg V r. 1 The...and n1anagement of the gold mining industry in South Africa -C. B. ANDERSON . . . . . . . . . page r J ... ( 2. The economy of the Union of South Africa-W. J. BusSCI-IAU 9 3. An introduction to the physical |  | | Journal (article/letter/editorial) | | supracontinental subduction at the Red River shear zone, northern Vietnam Nobuhiko Nakano, Yasuhito Osanai, Nguyen...supracontinental subduction at the Red River shear zone, northern Vietnam. The address for the corresponding author...supracontinental subduction at the Red River shear zone, northern Vietnam a SC RI PT Nobuhiko Nakanoa,*, Yasuhito...title: Permian supracontinental subduction in northern Vietnam 1 ACCEPTED MANUSCRIPT ABSTRACT We have...aluminous granulites from the Red River shear zone in northern Vietnam using mineral and whole-rock chemistries |  | | Journal (article/letter/editorial) | | In some areas of the Peninsula, e. g. in its western part (upper Yavr River), an important role is played...lower Paleozoic age. In metamorphic rocks from the Northern Caucasus known to be of the Paleozoic age, e.g...boundaries of the Ukrainian shield (the south Russian crystalline belt) a wide range of various metamorphic...massive magnetite or hematite. Schists from the northern Caucasus are presented as an example . 5 In the...in the Urals, especially in their central and northern parts (A. N. Zavaritsky, D. S. Korzhinsky, L. |  | | Journal (article/letter/editorial) | | structural depressions among uplifts. There is a north-south line in the central portion of the area, in addition...Laramide-Alpide country. Solifluction, however, makes the northern slope of every east-west valley steeper than the...begin with, is particularly dramatic in the eastern belt; the higher craters are emitting predominantly basaltic...in opal, sulfur, alunite, dickite, sericite and diaspore. This would definitely point to several volcanic...examination of the most shallow intruded bodies of the belt reveals that a considerable amount of acid rock |  | | Report (issue) | | photographed within Shenandoah National Park in the Blue Ridge province of Virginia. 10 9 8 7 6 5 4 3 2...cation diffusion during polyphase orogenesis, western Grenville Province, Québec . . . . . . . . . ....northwest-directed thrusting in the Composite Arc Belt, southeastern Ontario . . . . . . . . . . . . ....Grenvillian metamorphism in the Central Metasedimentary Belt, Grenville Province, Québec . . . . . . . . . ....southern Appalachian crystalline core, Georgia, South Carolina, North Carolina, and Tennessee: New provenance |  | | Book | | S. A. for the East European Countries, China, Northern Korea, Cuba, Vietnam and Mongolia Academia, Publishing...lithosphère are set in motion away from the mid-oceanic ridge. The divergent movement changes into convergent...Hills,Uganda, and Palabora in the Republic of South Africa· Carbonatites axist in a similar position in...°C, montmorillonite at 430 °C, pyrophyllite and diaspore form above 300 °C, the latter disappearing at...oldest basalts in the north-western archipelago whereas on the youngest in the south-east only brown earth |  | | Journal (article/letter/editorial) | | illustrating the nature of Archean volcanismin southern Africa and elsewhereare made available for purposesof...mineralization. The Archean mineralization of southern Africa is briefly compared and contrasted with that of...the easternpart southern Africa. of Botswana, the northeasternsegment of South The purposes of this paperare...paperare, briefly,to consider Africa, and Rhodesia,the shield consistsof two crathe nature and distribution...southernAfrica and to relatethe mineraldeposits belt. Rangingin age from 2,700 to 3,500 m.y. (or to one |  | Christie, A. B., Simpson, M. P., Brathwaite, R. L., Mauk, J. L., Simmons, S. F. (2007) Epithermal Au-Ag and Related Deposits of the Hauraki Goldfield, Coromandel Volcanic Zone, New Zealand. Economic Geology, 102 (5) 785-816 doi:10.2113/gsecongeo.102.5.785 | Journal (article/letter/editorial) | | epithermal deposits can be broadly subdivided into northern, southern, and eastern groups based on their host...occur in the oldest andesite and dacite in the northern portion of the goldfield, but some of these are...50 epithermal Au-Ag deposits in a north-south–oriented belt, 200 km long by up to 40 km wide, extending...leads to a broad geographic-based grouping into northern, southern, and eastern deposits (Fig. 2A) and...Au-Ag deposits Miners Head Kr-Ar 18.1-16.3 Ma Northern Porphyry Cu deposits Very small < 0.2 t Au |  | | Book | | Unconformity-type uranium deposits of the Northern Territory, Australia and Northern Saskatchewan, Canada Sandstone-hosted...Sandstone-hosted uranium deposits of the western USA Concluding statement References ORES FORMED BY MET AMORPHISM...valuable criticisms of individual chapters: Dr]. D. Ridge DrC A. Lee Mr A. M. Killick Dr P. H. Nixon Dr P...regions. Term broadly applied in the SW USA and South America. Carbonatization A type of hydrothermal...geology have characterized not only the premier Western publication concerned with ore deposits, but also |  | | Report (issue) | | 38 Kyanite in Virginia Geology of the Kyanite Belt of Virginia lrY ANNA I. JONAS Economic Aspects...38 Kyanite in Virginia Geology of the Kyanite Belt of Virginia BY ANNA T. JONAS Economic Aspects...nia-. It consists of the,Geotogy of the Kyanite Belt of VirEinie, fy Or. Anna I. Jonas, and Economic... CONTENTS Pecn Abstract xi Geology of the Kyanite Belt of Virginia, by Anna Introduction -_-___ Location...the Piedmont and Blue Ridge provinces__ Martic thrust block Catoctin-Blue Ridge anticlinorium Origin of |  | | Report (issue) | | and adjacent areas _____ _ E ter-Cleary mineral belt, Fairbanks region ________________________ _ Hyder..._________________ _ Eastern Seward Peninsula ____________ _ Western Seward Peninsula ____________ _ Southeastern Alaska...New Hampshire _-------------------Central and northern New Hampshire _----Ossipee Lake area _-----------------ew...County __ ---------- -- ------South Carolina ____ -- __ - - ---- -- -----South Dakota ____ ------------------Gold...Precambrian rocks, northern Black Hills _______________ _ Ore deposits in Paleozoic rocks, northern Black Hills |
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Lohatlha Mine, Western Belt, Gamagara Ridge, Northern Cape, South Africa