Download or read book Mineralogical Features of Gold Ores in South Africa written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold in the Witwatersrand System is discussed with respect to geological aspects, a macroscopic description of the conglomerate, mineral composition of the conglomerate, occurrence and composition of the gold, distribution of gold and heavy minerals, chemical composition of gold, refractory properties of the ores, and genesis of the gold. Gold in the Barberton Mountain Land is considered in terms of geological aspects, gold production, mineralogy of the ores, composition of the gold, paragenesis of the ore minerals, and refractory properties of the ores and their treatment.

Download or read book Geology and Mineralogy of the Principal Goldfields in South Africa written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter gives a very comprehensive account of the South African goldfields, starting with a summary of the history of gold in South Africa and ending with 145 references. As pointed out, a total of 39 849 502 kg of fine gold was produced in South African mines up to the end of June 1985. This includes the production from gold mines in the Barberton Mountainland, mines extracting gold as a byproduct, and small mining corporations, which together contributed about 1 per cent of the total gold output. If the gold production for the second half of 1985 is taken at 320 000 kg of fine gold, the total output of gold for the period 1884 to 1985 surpassed 40 million kg of fine gold. The geology of the sediments in the Witwatersrand Triad is detailed, special attention being paid to the placers, which are the dominant gold-bearers, to the nature and mode of occurrence of the gold, to the distribution of the gold and heavy minerals, and to the chemical composition of the gold. As a small amount of the gold is not extracted by the processes of gold recovery currently practised on the Witwatersrand (0,1 to 1,0 g/t from a gold content of 5 to 15 g/t), attention is paid to the gold in the residues, which consists of gold enclosed by other minerals, or coated gold, thus shielded from contact with the lixiviant; gold dissolved during leaching then adsorbed by other minerals or by extraneous matter in the mill pulp; large gold particles incompletely dissolved when the residence time in the lixiviant was inadequate; or incompletely dissolved grains as a result of galvanic interaction between gold in contact with certain minerals, causing a decrease in the dissolution rates. Apart from the gold and silver minerals, other minerals of economic importance in these ores are uranium-bearing constituents, platinum-group minerals and cobalt-bearing and nickel-bearing sulpharsenides, and abundant pyrite (used for the production of sulphuric acid). In the current economic climate, they cannot be exploited on their own but are valuable byproducts of the gold. The gold of the Barberton Mountainland is described in a similar way, an account being given of the geological setting, the distribution and ore genesis of the gold mineralization, the mineralogical characteristics of the gold ores, and their refractory nature and treatment. The chapter is illustrated by seven line drawings and 24 photomicrographs. It also contains numerous tables.

Download or read book The Ore Deposits of South Africa written by James Paul Johnson and published by . This book was released on 1908 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Extractive Metallurgy of Gold in South Africa written by G. G. Stanley and published by . This book was released on 1987 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annotated Bibliographies of Mineral Deposits in Africa Asia Exclusive of the USSR and Australasia written by John Drew Ridge and published by Elsevier. This book was released on 2013-10-02 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotated Bibliographies of Mineral Deposits in Africa, Asia (Exclusive of the USSR) and Australasia brings together annotated bibliographies of mineral deposits in Africa, Asia (with the exception of the USSR), and Australasia. Each bibliography is followed by notes to show the deposit's location; geological framework; age and type; structural and stratigraphic relations; conditions of formation; and position in the modified Lindgren classification. Comprised of 25 chapters, this volume begins with an introduction to the more important sources of references in the bibliographies, set down in alphabetical order with the number of references provided by each source. The distribution of deposits by continent and country follows. The deposits include molybdenum, nickel, copper, lead, and tin. Eruptive rocks, the metamorphic cycle, and the mineralization process are addressed, along with liquid immiscibility between silicate magmas and sulfide melts; the geology, mineralogy, and petrology of ore deposits in various mines; and the significance of mineralized breccia pipes. This book will be of value to mineralogists, geologists, and earth and mineral scientists as well as students interested in ore deposits.

Download or read book Geochemistry Mineralogy and Genesis of Gold Deposits written by I.Y. Nekrasov and published by Routledge. This book was released on 2018-05-02 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behaviour of gold in sedimentary, magmatic and postmagmatic processes are studied and 40 gold-bearing minerals including ten which were recently discovered are described. The results are presented of new experimental studies on phase relations in gold-sulphide systems. The solubility & form of gold migration in high-temperature chloride, sulphide and arsenic solutions are determined. Based on the new data, the genesis of gold deposits is studied and a geochemical classification proposed. This book is designed for specialists in the field of gold chemistry, geochemistry and mineralogy and for field geologists surveying and prospecting for gold.

Download or read book Process Mineralogy of Gold Ores written by N. Clark and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mineral Resources of the Union of South Africa written by Geological Survey (South Africa) and published by . This book was released on 1936 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gold written by Nathaniel Arbiter and published by CRC Press. This book was released on 1990 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eight articles first appeared as volume 6 (no date) of Mineral processing and extractive metallurgy review. They review new methods of recovery for gold, and to some extent, silver, focus on the particular challenges of extraction from carbonaceous ores and from various sulfide-bearing ore, and the treatment of refractory gold ore, and discuss high-temperature and biological oxidation, high- temperature chlorination, and removing metals from leach liquor. Book club price, $40. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Gold Metallurgy in South Africa written by D. E. R. Ayres and published by . This book was released on 1972 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Gold Mines of the Rand written by Frederick Henry Hatch and published by . This book was released on 1895 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book S A Geology and Mineralogy for Metallurgists written by and published by . This book was released on 1983 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Recognition Criteria for Uranium Deposits of the Quartz pebble Conglomerate Type written by A. Button and published by . This book was released on 1980 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Au U Fe Mn Hg Sb W and P Deposits written by Bozzano G Luisa and published by Elsevier. This book was released on 2012-12-02 with total page 663 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Strata-Bound and Stratiform Ore Deposits, Volume 7: Au, U, Fe, Mn, Hg, Sb, W, and P Deposits focuses on the characteristics, properties, origins, and structures of Au, U, Fe, Mn, Hg, Sb, W, and P deposits. The selection first elaborates on gold in the Proterozoic sediments of South Africa, nature of the Witwatersrand gold-uranium deposits, and origin of Western-States type uranium mineralization. Discussions focus on tectonic conditions, sedimentation, mineralization and alteration, architecture of the Witwatersrand Basin, source of wealth in the Witwatersrand Basin, gold mineralization in South Africa, and ground-rules for gold prospecting. The text then ponders on origin of the Precambrian banded iron-formations, aspects of the sedimentary petrology of cherty iron-formation, and genetic problems and environmental features of volcanosedimentary iron-ore deposits of the Lahn-Dill Type. Concerns cover geological setting, crystallization structures, origin of cherty iron-formations, similarities and differences between banded and oolitic iron-formations, regional geologic distribution, and general diagnostic statement. The manuscript examines sedimentary phosphate deposits, ancient manganese deposits, and freshwater ferromanganese deposits. The selection is a dependable reference for researchers wanting to explore Au, U, Fe, Mn, Hg, Sb, W, and P deposits.

Download or read book Pocket Guide to Rocks Minerals of southern Africa written by Bruce Cairncross and published by Penguin Random House South Africa. This book was released on 2015-02-03 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Southern Africa’s rocks span an enormous time period and the region boasts a wealth of mineral deposits. This handy pocket guide presents a selection of the most common, fascinating and important rock and mineral species to be found here. Each entry includes:  full-colour photographs  a concise description  uses, both historic and current, and  detailed information on where in the region species are found. The physical and diagnostic characteristics of each mineral are summarized in tinted panels, and handy icons show other important information at a glance. In addition, the rock section discusses how the three main rock types form. A comprehensive glossary explains difficult technical terms. Compact and easy-to-use, the Pocket Guide – Rocks & Minerals of Southern Africa will be invaluable both to amateur geologists and budding collectors.

Download or read book Gold and Other Precious Metals written by Claudia Gasparrini and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: A view of gold and other precious metal extractions from a new and wider angle, taking in both the earth and the metallurgical sciences. To name but a small number of the topics covered: - Occurrences of gold and silver minerals in their ores - Photomicrographs of refractory and amenable minerals/ores - The use of irregular gold and silver distributions for efficient planning of the extraction process - Microanalytical techniques - Descriptions of uranium and many base metals for comparison. Written with a broad audience in mind, from the manager of operations to the metallurgist, for the field geologist or other earth scientist, and for the professor and student alike.