 | | 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...and Gloucester in the central part of the Western Belt (Fig. 1B). Siliceous ores occur locally in the Wolhaarkop |  | | 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...Particularly widely known were ore minerals such as pyrolusite, that was described for the first time by Plinium...ancient glaciers, and the glaciation epoch of the northern countries - in Scotland, in Scandinavia, in Finland |  | | Journal (article/letter/editorial) | | THF,Postmasburg manganese field,situated in the Northern replacement of the countryrockbymanganeseCapeProvince...In contrast Schneiderh6hn (1931)suggested in the south(Fig. 1). Miningof the manganese orescom- Borchert...'ostmasburg v ,6p Fe-deposit v V ¾ v v • v ¾ v Cape Town'•v v v •. v v v v F•c. 1. Regional...withlow-angle uneonformity byLate Beeshock in the northern and southern extremities of the domewheretheyconstitute...conglomerate finesupwardinto a sucFormationalongthe north-south-striking, westerlydipping The Doornfontein BlackRidgethrust |  | | Report (volume) | | ........................... North Carolina and South Carolina.............................. Georgia.................................................. South Dakota.................................;..........mines............................ 178 Deposits south of Cristo and at Dos Bocas.................................................................. 181 South America............................................................................. Eurasia and Africa............................................... |  | | 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 |  | Costin, Gelu, Fairey, Brenton, Tsikos, Harilaos, Gucsik, Arnold (2015) Tokyoite, As-Rich Tokyoite, and Noélbensonite: New Occurrences From the Postmasburg Manganese Field, Northern Cape Province, South Africa. The Canadian Mineralogist, 53 (6) 981-990 doi:10.3749/canmin.1500063 | Journal (article/letter/editorial) | | THE POSTMASBURG MANGANESE FIELD, NORTHERN CAPE PROVINCE, SOUTH AFRICA GELU COSTIN Department of Geology...Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa Department of Earth Science, MS-126 Rice University...Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa ARNOLD GUCSIK Department of Geology, University...University of Johannesburg, Johannesburg, South Africa ABSTRACT Samples of manganese-rich rock containing...from the Postmasburg area in the Northern Cape Province of South Africa. The samples consist of fine-grained |  | | 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...cut off by the parallel GamagaraFault. (2) The Eastern,which more preciselyconsists of an arcuate chain...ganeseCo. ownsand hastestedthe southernpart of the Eastern Belt, but has not yet exported; it possesses huge...on Doorn Put, but over a gooddeal of the Western Belt, saveat either end, it is presentas mere remnants |  | | Journal (article/letter/editorial) | | relativelyshallow)shows that the manganese peroxideminerals(pyrolusite, cryptomelane,etc.) are found only to a depth...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 |  | | Journal (article/letter/editorial) | | FrancisPhysical properties.--Braunitecrystallizesin the can belt of the Coast Ranges, California; Magnet tetragonal...Ranges from the Transverse Ranges on the south to the northern coast, the FranciscanFormation containsat...ganese oxideminerals, largelyhollandite, psilomelane, belt of sedimentaryrocks,mostlyearly Mesozoicin andcryptomelane...westernslopeof the Sierra -to them. Nevada. In the Sierran Belt, however, the rocks Severalsamplesof manganese...Grand County, Utah, eraIs have•been explored in a belt of rocks that small needle-shaped crystals having |  | | Book (edition) | | Southern Africa a Collector’s Guide ■ Rocks, Minerals and Gemstones of Southern Africa & — - ... T ~ '' .rats en&nes L of Southern Africa A Collector’s Guide - Struik Publishers (an operating...Ltd.) Struik House Oswald Pirow Street Foreshore, Cape Town 8001 First edition 1976 Second edition 1983...©E.K. Macintosh Cover design by Neville Poulter, Cape Town Lithographic reproduction by Tien Wah Press...Ltd, Singapore Photoset by McManus Bros (Pty) Ltd, Cape Town Printed and bound by Interpak, Pietermaritzburg |  | | Journal (article/letter/editorial) | | Johannesburg, Auckland Park 2006, Johannesburg, South Africa M. RHALMI, Paleoproterozoic Mineralization...Johannesburg, Auckland Park 2006, Johannesburg, South Africa, and Department of Earth Sciences, Faculty of...Johannesburg, Auckland Park 2006, Johannesburg, South Africa, and Department of Geology, Presidency College...Geologic Setting The Imini district is located south of the Central High Atlas Mountains of Morocco,...the manganese mineralization that is known along a belt 20 km long and 400 to 1,000 m wide (modified after |  | 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...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 |  | | Report (volume) | | near Sugar Grove, Va.; B, Blacled crystals of pyrolusite, from Powells Fort mine, near Woodstock, Va.;...10 10 VIII ILLUSTRATIONS. 0 PLATE IX. A, Pyrolusite crystallized in plumose form in a narrow crevice...Scattered detached plumose nodules of magnetite and pyrolusite embedded in crystalline quartz, from shaft of...ore and tunnel into carbonate ore; B, Sketch of south pit of East Fork mine, showing upper bench____ 33...Mountain' City on the north to Sweetwater on the south. Mr. H. V. Maxwell, of Hampton, was especially helpful |  | | Journal (article/letter/editorial) | | types. Of special interest is the Pambak-Zangezm belt of copper-molybdenum "porphyry" type deposits in...ores of Kadzharan, Agarak and Dastakert are in this belt. The deposits are within or at the contacts of quartz...ten deposits of Hercynian age. The deposit of eastern Kounrad consists of steeply dipping quartz veins...lengths of several hundred kilometers. The Alay belt in the Kirgiz SSR and Kweichow in southeastern China...the succession of genetic hyPotheses concerning a belt of some 30 copper deposits ranging about a thousand |  | | Report (volume) | | PRESTON E. HOTZ ABSTRACT The magnetite deposits of northern New Jersey are in rocks of pre-Cambrian age, which...^> ^ / Q N M 0 U T H ^^ Index map of northern New Jersey, showing location of magnetite deposits...pre-Cambrian rocks occupy a prominent belt that trends northeast through the northern part of the state, a region...locally known as the New Jersey Highlands. This belt is bounded on the southeast by Triassic sedimentary...limestone occupies areas about the Ahles mine and south of the Pequest district, which are described in |  | | 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; |  | | Report (issue) | | Carroll County gold belt and the southwestern portion of the Dahlonega gold belt Jerry M. German Georgia...Carroll County gold belt and the southwestern portion of the Dahlonega gold belt Jerry M. German Georgia... 0 0 0 0 0 0 Sandy Springs Group (western belt) Introduction 0 0 0 0 0 0 0 0 Dog River...0 o o Burnt Hickory Ridge District 0 0 0 South Canton District 0 0 o Introduction 0 0 0...Tables 1. Correlation chart of fold events in the northern Piedmont of Georgia ......................... |  | | 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...is the most recent geologic date represented in Eastern Sayan ranges. Here, again, the earliest date of...begin with, is particularly dramatic in the eastern belt; the higher craters are emitting predominantly...examination of the most shallow intruded bodies of the belt reveals that a considerable amount of acid rock |  | | Book (volume) | | Republic to embark in principle on a fifth volume, Eastern Europe, to include European Russia and Turkey....The Carpatho—Balkan niecallogenie pros : vince (Eastern Serbia) The Pre-Devonian metatlogeni epoch The...fragments (‘microcontinents’) between Europe and Africa is still imperfectly understood. This difficulty...an account of ore genesis in the Alps, as the eastern Alps are part of the complex junction of these...about the nature and age of ore formation in the eastern Alps would thus be unrealistic. First let me define |  | | Report (issue) | | ___-__-----_____--________ 27 Section of lavas south of Black Canyon__.____________-_-_________-____...part of a. rectangular area 35 miles north and south by 24 miles east and west, which lies 19 miles west...only by a low gap, form an almost continuous north-south range that rises about 2,500 feet above the highest...Range. The town of Pioche lies midway on the. eastern foot of the Ely Range. ROOKS OF THE PIOOHB REGION...tuffs were measured in Condor Canyon, near the south end of the Ely Range. The age of the lavas is not |  | | Journal (article/letter/editorial) | | deposit lies on the eastern side of the Raub-Bentong Suture line within the Central Belt of Permo-Triassic...main structural features of the area are north–south-trending leftlateral strike-slip faults and their...their subsidiaries, which generally strike north–south and dip moderately to the east (350°–360°/40°–60°)...throughout the country, especially in the Central Belt of Peninsula Malaysia. Long before the development...development of the great gold-fields such as in South Africa, Australia and USSR, Malaysia had already established |  | | 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 |  | | Book | | UNDTCD, UN-assisted Project—Mineral Exploration in Northern Tanzania PO Box 641, Arusha, Tanzania 1981 ay...the UN-assisted Project-Mineral Exploration in Northern Tanzania for preparation of the bulk of the diagrams...sulphide deposits in extensional inter-arc basins, eastern Australia 5 Preservation potential Back-arc Marginal...Angola, Brazil and Uruguay Kimberlites in western Africa, Brazil and Australia Basic/ultrabasic intrusions...Upper Cenozoic sulphur and gold-silver deposits in eastern Japan III Continental Lineaments and Mineralization |  | | Book | | Y PRESS Cambridge, New York, Melbourne, Madrid, Cape Town, Singapore, São Paulo, Delhi, Tokyo, Mexico...Granitoids of Eastern Dharwar Eastern Dharwar Schist Belts Kimberlites and Lamproites Western and Eastern Dharwar...Introduction Southern (Bastar) Crustal Province (SCP) Northern (Bundelkhand) Crustal Province (NCP) Tectonic...Dalli–Rajhara–Rowghat–Bailadila Belt Gold in Kotri Belt Gold in Sonakhan Greenstone Belt 233 233 234 235 239 256...12/15/2011 5:05:15 PM vi Contents Gold in Raigarh Belt 257 Copper–Molybdenum (–Gold) Mineralisation at |  | | Report (volume) | | summary of the western mineral belt Mineralization in the western belt 5 Phillipsburg and Grafton districts...Kingston district, including North Percha Creek and South Percha Creek 15 areas Location 15 Production 15...Geologic setting 15 Geochemical information 18 South Perch a Creek-Trujillo Canyon gap 18 Tierra Blanca...Mountain-Juniper Peak gap 19 Tierra Blanca district-eastern part 20 Location 20 Production 20 Geologic setting...General summary of the eastern mineral belt 21 Mineralization in the eastern belt 24 Iron Mountain mineralized |
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