2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2021.2.4 pmi-13881 https://pmi.spmi.ru/pmi/article/view/13881 Геология Geology Features of the mineral and chemical composition of the Northwest manganese ore occurrence in the Highveld region, South Africa Особенности минерального и химического составов Северо-Западного рудопроявления марганца в районе Хайфельда, ЮАР Evdokimov Aleksandr N. Евдокимов А. Н. Evdokimov Aleksandr N. evdokimov48@list.ru Санкт-Петербургский горный университет (Санкт-Петербург, Россия) Saint Petersburg Mining University (Saint Petersburg, Russia) Pharoe Benedict L. Пхарое Б. Л. Pharoe Benedict L. benedictpharoe1@gmail.com Санкт-Петербургский горный университет (Санкт-Петербург, Россия) Saint Petersburg Mining University (Saint Petersburg, Russia) 24 06 2021 2021 248 195 208 20 08 2020 01 04 2021 24 06 2021 © 2021 А. Н. Евдокимов, Б. Л. Пхарое © 2021 Aleksandr N. Evdokimov, Benedict L. Pharoe 2021 А. Н. Евдокимов, Б. Л. Пхарое Aleksandr N. Evdokimov, Benedict L. Pharoe Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/13881

Северо-Западное рудопроявление марганца расположено на удалении от традиционных районов добычи в новом марганценосном районе Южно-Африканской республики, в пределах района Хайфельд, на площади фермерских хозяйств: Бухансвейл 61 IQ, Вельтевреден 517 JQ, Реностерхук 343 JP и Кафферскрааль 306 JP. Полученные данные по геологии этого рудопроявления представляют интерес для разработки критериев поиска аналогичных руд на северо-западе ЮАР. Здесь руда встречается в виде порошкообразного марганцевого вада, марганцевых конкреций и корок, приуроченных к карстовым структурам на верхней части разреза доломитов. Для характеристики рудопроявления были изучены минеральный и химический составы руды методами рентгеновской дифрактометрии, растровой электронной микроскопии и рентгеновской флуоресценции. Приведены результаты изучения состава марганцевой руды по площади и на глубину распространения. Установлены области развития карстового процесса, который вызвал увеличение локальной мощности рудного тела. Результаты изучения минерального и химического составов руд свидетельствуют об их гипергенном генезисе. Главные рудные минералы: криптомелан, литиофорит, пиролюзит, голландит и романехит, примесные компоненты: Ba, Ce, Co, La, Ni, Cr, Zn и V.

The Northwest manganese ore mineralisation is located at a relative distance from traditionally known manganese mining areas in a new manganese-bearing region (Highveld) in the Northwest Province, Republic of South Africa. The ore occurrence was studied on farms: Buchansvale 61 IQ, Weltevreden 517 JQ, Rhenosterhoek 343 JP and Kafferskraal 306 JP. The data obtained from studying the geology of the area pointed out to interests regarding the development criterias for search of similar ore mineralisations in the northwest region of South Africa. The ore occurs predominantly in the form of powdered manganese wad, manganese nodules and crusts, confined to the karstic structures of the upper section of the dolomites. X-ray powder diffraction (XRD), Scanning electron microscopy with energy dispersive link (SEM-EDS) and X-ray fluorescence were utilized to unveil the mineral and chemical composition of the ore samples. The present study therefore presents the results on both chemical and mineral composition of manganese ores, and their depth and longitudinal distribution. Karstic areas causing an increased local thickness of the ore body were identified. The geochemical and microspcopic study of the ores indicates their supergene nature. The main ore minerals includes cryptomelane, lithiophorite, purolusite, hollandite and romanechite associated with impurity components of Ba, Ce, Co, La, Cr, Zn and V.

 Ключевые слова марганцевые руды зона гипергенеза ЮАР район Хайфельд Keywords manganese ores hypergenesis zone South Africa Highveld region Геохимические барьеры в никелевых корах выветривания на примере Буруктальского месторождения (Южный Урал) / И.В.Толовина, В.Г.Лазаренков, Н.И.Воронцова и др. // Записки Горного института. 2011. Т. 194. С. 112-119. Talovina I.V., Lazarenkov V.G., Vorontsova N.I. et al. Geochemical barriers in supergene nickel deposit on the example Buruktal deposit (South Urals). Journal of Mining Institute. 2011. Vol. 194, p. 112-119 (in Russian). Пхарое Б.Л. Состав и реконструкция источников сноса терригенных отложений на северо-западе ЮАР / Б.Л.Пхарое, А.Н.Евдокимов // Геология и геофизика Юга России. 2020. Т. 10. № 4. С. 124-149. DOI: 10.46698/VNC.2020.48.31.008 Pharoe B.K., Evdokimov A.N. Composition and provenance reconstruction of terrigenous deposits in the North-West of South Africa. Geologiya I Geofizika Yuga Rossii – Geology and Geophysics of Russian South. 2020. Vol. 10. N 4, p. 124-149. DOI: 10.46698/VNC.2020.48.31.008 (in Russian). Юдович Я.Э. Основные закономерности геохимии марганца: Монография / Я.Э.Юдович, М.П.Кетрис. Сыктывкар: Коми научный центр Уральского отделения Российской академии наук, 2013. 40 с. Yudovich Ya.E., Ketris M.P. Main regularities of manganese geochemistry: Monograph Syktyvkar: Komi nauchnyi tsentr Uralskogo otdeleniya Rossiiskoi akademii nauk, 2013, р. 40 (in Russian). An 40Ar/39Ar age of supergene K-Mn oxyhydroxides in a post-Gondwana soil profile on the Highveld of South Africa / H.S.Van Nierkerk, J.Gutzmer, N.J.Beukes et al. // South African Journal of Geology. 1999. Vol. 85. Iss. 10. P. 450-454. DOI: 10520/AJA00382353_9004 Van Nierkerk H.S., Gutzmer J., Beukes N.J. et al. An 40Ar/39Ar age of supergene K-Mn oxyhydroxides in a post-Gondwana soil profile on the Highveld of South Africa. South African Journal of Geology. 1999. Vol. 85. Iss. 10, p. 450-454. DOI: 10520/AJA00382353_9004 Beukes N.J. Manganese deposits of Africa / N.J.Beukes, E.W.Swindell, H.Wabo // Episodes Journal of International Geosci-ence (IUGS). 2016. Vol. 39. Iss. 2. P. 285-317. DOI: 10.18814/epiiugs/2016/v39i2/95779 Beukes N.J., Swindell E.W., Wabo H. Manganese deposits of Africa. Episodes Journal of International Geoscience (IUGS). 2016. Vol. 39. Iss. 2, p. 285-317. DOI: 10.18814/epiiugs/2016/v39i2/95779 Burke K. The African erosion surface: a continental-scale synthesis of geomorphology, tectonics, and environmental change over the past 180 million years / K.Burke, Y.Gunnell. Geological Society of America, 2008. Vol. 201. 67 p. Burke K., Gunnell Y. The African erosion surface: a continental-scale synthesis of geomorphology, tectonics, and environmental change over the past 180 million years. Geological Society of America. 2008. Vol. 201, p. 67. Button A. Geochemistry of the Malmani Dolomite of the Transvaal Supergroup in the North-eastern Transvaal // Economic Geology Research Unit University of Witwatersrand. 1975. № 97. P. 1-21. Button A. Geochemistry of the Malmani Dolomite of the Transvaal Supergroup in the North-eastern Transvaal. Economic Geology Research Unit University of Witwatersrand. 1975. N 97, p. 1-21. De Villiers J. The manganese deposits of the Union of South Africa. Pretoria: Geological Survey of South Africa. Vol. 2. Government Printer, 1960. 263 p. De Villiers J. The manganese deposits of the Union of South Africa. Pretoria: Geological Survey of South Africa. Vol. 2. Government Printer, 1960, p. 263 Dzemua L. Mineralogical characterization of the Nkamouna Co-Mn laterite ore, southeast Cameroon / L.Dzemua, S.A.Gleeson, P.F.Schofield // Miner Deposita. 2013. Vol. 48. P. 155-171. DOI: 10.1007/s00126-012-0426-3 Dzemua L., Gleeson S.A., Schofield P.F. Mineralogical characterization of the Nkamouna Co-Mn laterite ore, southeast Cameroon. Miner Deposita. 2013. Vol. 48, p. 155-171. DOI: 10.1007/s00126-012-0426-3 Els B.G. The Black Reef Quartzite Formation in the western Transvaal: Sedimentological and economic aspects, and significance for basin evolution / B.G.Els, W.A.van den Berg, J.J.Mayer // Mineralium Deposita. 1995. Vol. 30. P. 112-123. DOI: 10.1007/BF00189340 Els B.G., Van den Berg W.A., Mayer J.J. The Black Reef Quartzite Formation in the western Transvaal: Sedimentological and economic aspects, and significance for basin evolution. Mineralium Deposita. 1995. Vol. 30, p. 112-123. DOI: 10.1007/BF00189340 First 40Ar/39Ar geochronology of lateritic manganiferous pisolites: Implications for the Palaeogene history of a West African landscape / F.Colin, A.Beauvias, G.Ruffet, O.Henocque // Earth and Planetary Sciences Letters. 2005. Vol. 238. Iss. 1-2. P. 172-188. DOI: 10.1016/j.epsl.2005.06.052 Colin F., Beauvias A., Ruffet G., Henocque O. First 40Ar/39Ar geochronology of lateritic manganiferous pisolites: Implications for the Palaeogene history of a West African landscape. Earth and Planetary Sciences Letters. 2005. Vol. 238. Iss. 1-2, p. 172-188. DOI: 10.1016/j.epsl.2005.06.052 Heshmatbehzadi K. Metallogeny of manganese and ferromanganese ores in Baft Ophiolitic Mélange, Kerman, Iran / K.Heshmatbehzadi, J.Shahabpour // Australian Journal of Basic and Applied Sciences. 2010. Vol. 4(2). P. 302-313. Heshmatbehzadi K., Shahabpour J. Metallogeny of manganese and ferromanganese ores in Baft Ophiolitic Mélange, Kerman, Iran. Australian Journal of Basic and Applied Sciences. 2010. Vol. 4(2), p. 302-313. Major influences on the evolution of the 2.67-21 Ga Transvaal Basin, Kaapval Craton / P.G.Eriksson, W.Altermann, O.Catuneaunu et al. // Sedimentary Geology. 2001. Vol. 141-142. P. 205-231. DOI: 10.1016/S0037-0738(01)00075-6 Eriksson P.G., Altermann W., Catuneaunu O. et al. Major influences on the evolution of the 2.67-21 Ga Transvaal Basin, Kaapval Craton. Sedimentary Geology. 2001. Vol. 141-142, p. 205-231. DOI: 10.1016/S0037-0738(01)00075-6 Manganese ores in Tunisia: Genetic constraints from trace element geochemistry and mineralogy / H.Garnit, D.Kraemer, S.Bouhlel et al. // Ore Geology Reviews. 2020. Vol. 120. № 103451. DOI: 10.1016/j.oregeorev.2020.103451 Garnit H., Kraemer D., Bouhlel S. et al. Manganese ores in Tunisia: Genetic constraints from trace element geochemistry and mineralogy. Ore Geology Reviews. 2020. Vol. 120. 103451. DOI: 10.1016/j.oregeorev.2020.103451 Maynard J.B. The chemistry of manganese ores through time: a signal of increasing diversity of earth-surface environments // Economic Geology (Spesial Issue). 2010. Vol. 105(3). P. 535-552. DOI: 10.2113/gsecongeo.105.3.535 Maynard J.B. The chemistry of manganese ores through time: a signal of increasing diversity of earth-surface environments.Economic Geology. 2010. Vol. 105(3), p. 535-552. DOI: 10.2113/gsecongeo.105.3.535 Mineralogy, geochemistry and genesis of the post-Gondwana supergene manganese deposit of the Carletonville-Ventersdorp area, North West Province, South Africa / B.K.Pharoe, A.N.Evdokimov, I.M.Gembitskaya, Y.Y.Bushuev // Ore Geology Reviews. 2020. Vol. 120. № 103372. DOI: 10.1016/j.oregeorev.2020.103372 Pharoe B.K., Evdokimov A.N., Gembitskaya I.M., Bushuev Y.Y. Mineralogy, geochemistry and genesis of the post-Gondwana supergene manganese deposit of the Carletonville-Ventersdorp area, North West Province, South Africa. Ore Geology Reviews. 2020. Vol. 120, p. 103372. DOI: 10.1016/j.oregeorev.2020.103372 Mineralogy, geochemistry and geological occurrence of supergene manganese ore mineralization in North West Province, South Africa / B.K.Pharoe, A.N.Evdokimov, I.M.Gembitskaya et al. // Russian Journal of Earth Sciences. 2020. Vol. 20. № ES5003. DOI: 10.2205/2020ES000703 Pharoe B.K., Evdokimov A.N., Gembitskaya I.M. et al. Mineralogy, geochemistry and geological occurrence of supergene manganese ore mineralization in North West Province, South Africa. Russian Journal of Earth Sciences. 2020. Vol. 20. N ES5003. DOI: 10.2205/2020ES000703 Nahon D. Lateritic concentration of manganese oxyhydroxides and oxides / D.Nahon, S.Parc // Geologische Rundschau. 1990. Vol. 79. P. 319-326. DOI: 10.1007/BF01830628 Nahon D., Parc S. Lateritic concentration of manganese oxyhydroxides and oxides. Geologische Rundschau. 1990. Vol. 79, p. 319-326. DOI: 10.1007/BF01830628 Nath B.B. Geochemical constraints on the hydrothermal origin of ferromanganese incrustations from the Rodriguez triple junction, Indian Ocean / B.B.Nath, W.L.Pluger, I.Roelandts // Geological Society of London, Special Publication. 1997. Vol. 119. P. 199-211. DOI: 10.1144/GSL.SP.1997.119.01.13 Nath B.B., WPluger.L., Roelandts I. Geochemical constraints on the hydrothermal origin of ferromanganese incrustations from the Rodriguez triple junction, Indian Ocean. Geological Society of London, Special Publication. 1997. Vol. 119, p. 199-211. DOI: 10.1144/GSL.SP.1997.119.01.13 Nickel and cobalt distribution in the laterites of the Lomie region, south-east Cameroon / R.Yongue-Fouateu, R.T.Ghogomu, J.Penaye et al. // Journal of African Earth Sciences. 2006. Vol. 45. Iss. 1. P. 33-47. DOI: 10.1016/j.jafrearsci.2006.01.003 Yongue-Fouateu R., Ghogomu R.T., Penaye J. et al. Nickel and cobalt distribution in the laterites of the Lomie region, south-east Cameroon. Journal of African Earth Sciences. 2006. Vol. 45. Iss. 1, p. 33-47. DOI: 10.1016/j.jafrearsci.2006.01.003 Nicholson K. Manganese ores of the Ghoriajhor-Monmunda area, Sundergarh District, Orissa, India: geochemical evidence for a mixed Mn source / K.Nicholson, V.K.Nayak, J.K.Nanda // Geological Society of London, Special Publication. 1997. Vol. 119. P. 117-121. DOI: 10.1144/GSL.SP.1997.119.01.08 Nicholson K., Nayak V.K., Nanda J.K. Manganese ores of the Ghoriajhor-Monmunda area, Sundergarh District, Orissa, India: geochemical evidence for a mixed Mn source. Geological Society of London, Special Publication. 1997. Vol. 119, p. 117-121. DOI: 10.1144/GSL.SP.1997.119.01.08 Partridge T.C. Geomorphic evolution of Southern Africa since Mesozoic / T.C.Partridge, R.R.Maud // South African Journal of Geology. 1987. Vol. 90. Iss. 2. P. 197-208. DOI: 10.10520/AJA10120750_958 Partridge T.C., Maud R.R. Geomorphic evolution of Southern Africa since Mesozoic. South African Journal of Geology. 1987. Vol. 90. Iss. 2, p. 197-208. DOI: 10.10520/AJA10120750_958 Pharoe B.K. Stratigraphy of the pedogenic manganese nodules in the Carletonville area, North West Province of South Af-rica: A case study of the General Nice Manganese Mine / B.K.Pharoe, K.Liu // Journal of African Earth Sciences. 2018. Vol. 143. P. 79-101. DOI: 10.1016/j.jafrearsci.2018.03.002 Pharoe B.K., Liu K. Stratigraphy of the pedogenic manganese nodules in the Carletonville area, North West Province of South Africa: A case study of the General Nice Manganese Mine. Journal of African Earth Sciences. 2018. Vol. 143, p. 79-101. DOI: 10.1016/j.jafrearsci.2018.03.002 Rare earth elements and yttrium in ferromanganese deposits from the South China Sea: distribution, composition and resource considerations / Y.Zhong, Z.Chen, F.Gonzalez et al. // Acta Oceanologica Sinic. 2018. Vol. 37. P. 41-54. DOI: 10.1007/s13131-018-1205-5 Zhong Y., Chen Z., Gonzalez F. et al. Rare earth elements and yttrium in ferromanganese deposits from the South China Sea: distribution, composition and resource considerations. Acta Oceanologica Sinic. 2018. Vol. 37, p. 41-54. DOI: 10.1007/s13131-018-1205-5 Rendall S.M. An extended X-ray absorption fine structure spectroscopy investigation of cadmium sorption on cryptomelane (KMn8O16) / S.M.Rendall, D.M.Serman, K.V.Ragnarsdottir // Chemical Geology. 1998. Vol. 151. Iss. 1-4. P. 95-106. DOI: 10.1016/S0009-2541(98)00073-4 Rendall S.M., Serman D.M., Ragnarsdottir K.V. An extended X-ray absorption fine structure spectroscopy investigation of cadmium sorption on cryptomelane (KMn8O16). Chemical Geology. 1998. Vol. 151. Iss. 1-4, p. 95-106. DOI: 10.1016/S0009-2541(98)00073-4 Structure and composition of micro-manganese nodules in deep-sea carbonate platform from the Zhaoshu Plateau, north of the South China Sea / X.Hengchao, P.Xiaotong, T.Kaiwen et al. // Minerals. 2020. Vol. 10(11). P. 1016. DOI: 10.3390/min10111016 Hengchao X., Xiaotong P., Kaiwen T. et al. Structure and composition of micro-manganese nodules in deep-sea carbonate platform from the Zhaoshu Plateau, north of the South China Sea. Minerals. 2020. Vol. 10(11), p. 1016. DOI: 10.3390/min10111016 Sulimova M.K. Possible use of processed ferromanganese concretions for production of sewage purification // Journal of Physics: Conference Series. 2019. Vol. 1339. Iss. 5. P. 055062. DOI: 10.1088/1742-6596/1399/5/055062 Sulimova M.K. Possible use of processed ferromanganese concretions for production of sewage purification. Journal of Physics: Conference Series. 2019. Vol. 1339. Iss. 5, p. 055062. DOI: 10.1088/1742-6596/1399/5/055062 Supergene ferromanganese wad deposits derived from the Permian Karoo strata along the Late Cretaceous-Mid-Tertiary African Land Surface, Ryedale, South Africa / A.Pack, J.Gutzmer, N.Beukes, H.S.Van Niekerk // Economic Geology. 2000. Vol. 95(1). P. 203-220. DOI: 10.2113/gsecongeo.95.1.203 Pack A., Gutzmer J., Beukes N., Van Niekerk H.S. Supergene ferromanganese wad deposits derived from the Permian Karoo strata along the Late Cretaceous-Mid-Tertiary African Land Surface, Ryedale, South Africa. Economic Geology. 2000. Vol. 95(1), p. 203-220. DOI: 10.2113/gsecongeo.95.1.203 Taylor S.R. The Continental Crust: Its Composition and Evolution / S.R.Taylor, S.M.McLennan. Boston: Blackwell Scien-tific, 1985. 312 p. Taylor S.R., McLennan S.M. The Continental Crust: Its Composition and Evolution. Boston: Blackwell Scientific, 1985, p. 312. The age of supergene manganese deposits in Katanga and its implications for the Neogene evolution of the African Great Lakes Regions / T.De Putter, G.Ruffet, J.Yans, F.Mees // Ore Geology Reviews. 2015. Vol. 71. P. 350-362. DOI: 10.1016/j.oregeorev.2015.06.015 De Putter T., Ruffet G., Yans J., Mees F. The age of supergene manganese deposits in Katanga and its implications for the Neogene evolution of the African Great Lakes Regions. Ore Geology Reviews. 2015. Vol. 71, p. 350-362. DOI: 10.1016/j.oregeorev.2015.06.015 Tinker J. Seismic Stratigraphic Constraints on Neoarchean -Paleoproterozoic Evolution of the Western Margin of the Kaapvaal Craton, South Africa / J.Tinker, M.de Wit, J.Grotzinger // South African Journal of Geology. 2002. Vol. 105(2). P. 107-134. DOI: 10.2113/105.2.107 Tinker J., de Wit M., Grotzinger J. Seismic Stratigraphic Constraints on Neoarchean -Paleoproterozoic Evolution of the Western Margin of the Kaapvaal Craton, South Africa. South African Journal of Geology. 2002. Vol. 105(2), p. 107-134. DOI: 10.2113/105.2.107 Vafeas N.A. Arsenic-bearing manganese ore of the Mukulu Enrichment in the Kalahari Manganese Field, South Africa: A new discrimination scheme for Kalahari manganese ore / N.A.Vafeas, L.C.Blignaut, K.S.Viljoen // Ore geology Reviews. 2019. Vol. 115. P. 1-12. DOI: 10.1016/j.oregeorev.2019.103146 Vafeas N.A., Blignaut L.C., Viljoen K.S. Arsenic-bearing manganese ore of the Mukulu Enrichment in the Kalahari Manganese Field, South Africa: A new discrimination scheme for Kalahari manganese ore. Ore geology Reviews. 2019. Vol. 115, p. 1-12. DOI: 10.1016/j.oregeorev.2019.103146 Vafeas N.A. New evidence for the early onset of supergene alteration along the Kalahari unconformity / N.A.Vafeas, L.C.Blignaut, K.S.Viljoen // South African Journal of Geology. 2018. Vol. 121(2). P. 157-170. DOI: 10.25131/sajg.121.0012 Vafeas N.A., Blignaut L.C., Viljoen K.S. New evidence for the early onset of supergene alteration along the Kalahari unconformity. South African Journal of Geology. 2018. Vol. 121(2), p. 157-170. DOI: 10.25131/sajg.121.0012 Van Niekerk H.S. Post-Gondwana pedogenic ferromanganese deposits, ancient soil profiles, African land surfaces and palaeoclimate change on the Highveld of South Africa / H.S.Van Niekerk, N.J.Beukes, J.Gutzmer // Journal of African Earth Sciences. 1999. Vol. 29. Iss. 4. P. 761-781. DOI: 10.1016/S0899-5362(99)00128-1 Van Niekerk H.S., Beukes N.J., Gutzmer J. Post-Gondwanapedogenic ferromanganese deposits, ancient soil profiles, African land surfaces and palaeoclimate change on the Highveld of South Africa. Journal of African Earth Sciences. 1999. Vol. 29. Iss. 4, p. 761-781. DOI: 10.1016/S0899-5362(99)00128-1 Varentsov I.M. Manganese Ores of Supergene Zone: Geochemistry of Formation. Dordrecht: Springer, 1996. Vol. 8. 302 p. DOI: 10.1007/978-94-017-2174-5 Varentsov I.M. Manganese Ores of Supergene Zone: Geochemistry of Formation. Dordrecht: Springer, 1996. Vol. 8. p. 302. DOI: 10.1007/978-94-017-2174-5