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ORE DEPOSIT TYPES AND THEIR PRIMARY EXPRESSIONS KGLateritic & supergene gold deposits Deposits in thick regolith; eg, Mt Gibson, Boddington, Panglo, McKinnons Au±Ag As W Sb Bi (lateritic types) Supergene deposits associated with palaeochannels Higginsville, Mount Pleasant, Zuleika Au Mt Weld P REE.Behavior of gold in the lateritic equatorial environment weathering and surface dispersion of residual goldApplicd GeochemisfryVol 6 pp 279 290 1991 Printed in Great Britain 0883 2927/91 %300+ LM 0 1991Pergamon Press plc Behavior of gold in the lateritic equatorial environment weathering and surface dispersion of residual gold particles, at Dondo Mobi, Gabon.DEPOSITOS SUPERGENOS DE OROKeywords supergene gold, secundary mineralization, lateritic deposits, saprolitic deposits, gold solubility, gold migration INTRODUCCION En las últimas décadas el oro ha sido buscado en los países del tercer mundo, los cuales están localizados en.SaproliteSaprolite is a chemically weathered rock Saprolites form in the lower zones of soil profiles and represent deep weathering of the bedrock surface In most outcrops its color comes from ferric compounds Deeply weathered profiles are widespread on the continental landmasses between latitudes 35°N and 35°S Conditions for the formation of.Gold and associated elements in the regolithThis report summarizes, integrates and discusses the results of over three years of research The research had the objectives of (a) obtaining a better understanding of the nature and genesis of the regolith and the lateritic and saprolitic gold deposits contained within it, and (b) determining characteristics useful in exploration for further such deposits and for primary mineralization.Morphology and composition of gold in a lateritic pro leMorphology and composition of gold in a lateritic pro le, Fazenda Pison Garimpo , Amazon, Brazil JH Larizzatti a,*, SMB Oliveira b, CRM Butt c a CPRM/Geological Survey of Brazil, Av Pasteur, 404, Rio de Janeiro, RJ 22290 240, Brazil b Universidade de Sa o Paulo, Rua do Lago, 562, Sa o Paulo, SP 05508 900, Brazil.The Geology of Las Cristinas Gold DepositHowever, not until very recently in the 1980s that mining in the district was apparently reactivated by several thousands of itinerant miners (garimpeiros), which discovered and surficially mined numerous gold rich lateritic and saprolitic deposits.

Fluid inclusion, siliceous rock geochemistry of Shewushan lateritic gold

Yan and Tan Kaixuan, 2002) Shewushan gold deposit is the first discovered lateritic gold deposit in eastern China and the largest in Asia A series of lateritic gold deposits had been found in succession from the end of 1980's to the beginning of 1990's, and have.

CSIRO Research Publications RepositoryLateritic Au deposits form where intense weathering under humid tropical to subtropical conditions has led to the development of a thick, lateritic regolith They are mostly small (10 Mt) and of low grade (1 5 g/t), but were very important in reviving the gold industry in Australia, Brazil and West Africa.Dispersion of gold and associated elements in thePrimary and saprolitic Au mineralization is indicated by a broad Au anomaly (100 to >1000 ppb) in the soils and lateritic residuum, and by high concentrations of W (5 to >40 ppm), Sb (7 to >16 ppm) and As (10 200 ppm) High K contents, corresponding to.Chapter K GEOENVIROMENTAL MODEL FOR LOW SULFIDE GOLD QUARTZ VEIN DEPOSITSbulk of the gold endowment may be found in the placer deposits Low sulfide gold quartz vein deposits subjected to deep tropical or temperate humid weathering can produce lateritic or saprolitic (eluvial placer) deposits (McKelvey, 1992) Deposit size The size.The Geology of Las Cristinas Gold DepositHowever, not until very recently in the 1980s that mining in the district was apparently reactivated by several thousands of itinerant miners (garimpeiros), which discovered and surficially mined numerous gold rich lateritic and saprolitic deposits.REGOLITH GEOCHEMISTRY4/12/2017· There are three types of gold enrichments in the regolith lateritic ones where the enrichment is in the ferruginous units ove\ lying upper saprolite or mottled zone, saprolitic ones where the enrichment is in the upper or lower saprolite and paleochannel對 deposits \ 洀椀渀漀爀尩 where the enrichment is either in the saprolite below the channel sediments or within the basal sediments.LATERITIC WEATHERING AND SECONDARY GOLD IN THE VICTORIAN GOLDLATERITIC WEATHERING AND SECONDARY GOLD Deposits of these coarse, often well rounded fluvial gravels in which vein quartz is commonly the dominant lithology, are now found on hills and ridges, and high on the sides of modem valleys (Brown.Chapter K GEOENVIROMENTAL MODEL FOR LOW SULFIDE GOLDbulk of the gold endowment may be found in the placer deposits Low sulfide gold quartz vein deposits subjected to deep tropical or temperate humid weathering can produce lateritic or saprolitic (eluvial placer) deposits (McKelvey, 1992) Deposit size The size.

The Behavior of Gold in the Lateritic Alterosphere

The Behavior of Gold in the Lateritic Alterosphere Man has been searching for Au at the surface of the earth for more than 6ooo years, and has used it as a symbolic, social and economic reference Since the beginning of this century, many studies have dealt with the geology of primary Au deposits of hydrothermal origin, and with secondary Au deposits which result from sedimentary, mainly.

Gold and associated elements in the regolithThis report summarizes, integrates and discusses the results of over three years of research The research had the objectives of (a) obtaining a better understanding of the nature and genesis of the regolith and the lateritic and saprolitic gold deposits contained within it, and (b) determining characteristics useful in exploration for further such deposits and for primary mineralization.Geochemical Mass Balance of Gold Under Various Tropicalcally distributed in the saprolitic horizon, which makes up most of the oxidized zone of lateritic deposits Finally, in the third step, the mass balance of the gold is considered for a series lateritic deposits In each case, the average gold content of the fresh parent.Mobility of Gold and Silver in Lateritic Weathering Profilesgenetic gold deposits This lateritic profile consists of an upper pisolitic layer of coarse ironstone pebbles (cemented by fer ruginous material) which may either crop out at the surface or be covered with a thin cover of soil The pisolitic layer, and usually better.ORE DEPOSIT TYPES AND THEIR PRIMARY EXPRESSIONS KGLateritic & supergene gold deposits Deposits in thick regolith; eg, Mt Gibson, Boddington, Panglo, McKinnons Au±Ag As W Sb Bi (lateritic types) Supergene deposits associated with palaeochannels Higginsville, Mount Pleasant, Zuleika Au Mt Weld P REE.Gold and pathfinder elements in ferricrete gold depositsSecondary mineral deposits have played an important role in the global mineral resource economy for over 50 years, with lateritic Au, Al, Fe and Ni deposits having a significant input to global metal production and reserv Fingerprint Dive into the research topics of 'Gold and pathfinder elements in ferricrete gold deposits of the Yilgarn Craton of Western Australia A review with new concepts'.Mobility of Gold and Silver in Lateritic Weathering Profilesgenetic gold deposits This lateritic profile consists of an upper pisolitic layer of coarse ironstone pebbles (cemented by fer ruginous material) which may either crop out at the surface or be covered with a thin cover of soil The pisolitic layer, and usually better.Dispersion of gold and associated elements in the lateriticPrimary and saprolitic Au mineralization is indicated by a broad Au anomaly (100 to >1000 ppb) in the soils and lateritic residuum, and by high concentrations of W (5 to >40 ppm), Sb (7 to >16 ppm) and As (10 200 ppm) High K contents, corresponding to.The Geochemistry of Gold in Lateritic Terrains1/1/1992· In arid areas, lateritic and saprolitic deposits may both be present where profiles are complete, separated by a zone 5 20 m thick that is barren of Au, though not necessarily of other ore related elements.

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