gold lateritic saprolitic deposits

Gold and pathfinder elements in ferricrete gold deposits

The major deposits of this type are bauxite Ni-Co laterite lateritic and saprolitic Au as well as some deposits of iron ore Mn Nb and/or phosphates Pt and U Freyssinet et al 2005 Some deposits formed as direct products of deep weathering whereas others were modified and/or upgraded during subsequent weathering episodes under changed...

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38a Lateritic/Saprolitic Nickel Cobalt Iron

38a Lateritic/Saprolitic Nickel Cobalt Iron Mineral Deposit Models Cox Singer model number or other Nickel-rich in situ lateritic weathering products developed from dunites and peridotit Ni-rich silicates and Ni iron oxid Description of model 38a modified...

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STUDY ON MINERALOGY AND CHEMISTRY OF THE

tion Soroako nickeliferous laterite deposit is the most important ore as source for Ni in In-donesia Despite this deposit has been pro-duced for nearly four decades the informa-tion on its mineralogical characteristic is min-imal The present paper discusses the miner-alogy and chemistry of saprolitic...

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Assessment of the Geotechnical Properties of Lateritic

Laterite is a highly weathered material rich in secondary oxides of iron aluminum or both Geotechnical investigation is one of the effective means of detecting and solving pre syn and post constructional problems The geotechnical properties of lateritic soils and their suitability for road construction have been evaluated for selected sites in Minna North-central Nigeria...

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Metallogeny of Gold Deposits in the Republic of Guinea

lateritic and/or saprolitic deposits or indications of gold-bearing quartz veins and stockworks ii the Siguiri Basin of savanna Guinea Kankan Siguiri Kouroussa Mandiana iii the Kouroufing Mamou and Kerouané and Beyla areas located in the southeast also have...

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PorterGeo Database

However mining in the district was apparently not reactivated until the 1980s when several thousands of itinerant miners garimpeiros located and surficially mined numerous gold-rich lateritic and saprolitic deposits...

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Lateritic nickel deposits of Brazil SpringerLink

Many nickel deposits are known in Brazil accounting for about 350 106 tons of ore with an average of 15 Ni All are of the lateritic type These deposits are scattered throughout the country being rarer in the Northeastern Region and in the South below 25 176 S latitude They are mainly associated with mafic-ultramafic massifs of large dimensions and ultramafic alkaline complexes and...

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PDF USING LATERITE GEOCHEMISTRY FOR EXPLORATION OF

Gold exploration in such complex terranes is better enhanced using laterites as the sampling mediumThe use of laterite trace element geochemistry in mineral exploration was initiated by Mazzucchelli and James 1 in Western Australia and has since become a useful tool for successful gold exploration in the world 2...

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Volta Grande gold mine project Report Wood Mackenzie

The Volta Grande project includes two lateritic and saprolitic gold type deposits Ouro Verde and Grota Seca A two phased approach is planned first with a processing capacity of 35Mt/a of ore and then increasing to 7Mt/a by year 3 Conventional open pit mining methods will be used...

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THE GEOLOGY OF GOLD DEPOSITS

THE GEOLOGY OF GOLD DEPOSITS The Perspective in 1988 REID R KEA YS W R H RAMSAY DAVID I GROVES EDITORS The search that never ends-panning for gold in the Yukon late nineteenth century THE ECONOMIC GEOLOGY PUBLISHING COMPANY Genesis of Supergene Gold Deposits in the Lateritic Regolith of the Yilgarn Block Western Australia...

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CSIRO Research Publications Repository

The saprolitic ore corresponds to oxidized mineralization between the weathering front and the mottled zone The lateritic ore is comprised of a dispersion halo in ferruginous pisoliths and retains its mushroom distribution even where buried In ore-grade laterite deposits gold mineralization is much larger several kilometres long in...

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PDF Gold deposits of Suriname geological context

In French Guiana three types of Proterozoic gold deposits can be recognized gold-bearing tourmalinites gold-bearing conglomerates and mesothermal ore deposits and used as...

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Geology « Lake Victoria Gold Gold and mineral

Mesothermal gold Au deposits also labelled Orogenic gold are a distinctive class of mineral deposit that has been the source for much of world gold production The ores are widely recognized in both Phanerozoic mobile belts and older cratonic blocks ie the Lake Victoria Goldfields located within the Tanzania Craton...

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Supergene gold mineralogy at Ashanti Ghana Implications

Mobility of arsenic in groundwater in the Obuasi gold-mining area of Ghana some implications for human health Geological Society London Special Publications Vol 113 Issue 1 p 163 Morphology and composition of gold in a lateritic profile Fazenda Pison Garimpo beneath which is a saprolitic zone of leached rock extending...

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Gold deposits of Suriname geological context production

The only recent comprehensive study on Surinamese gold deposits is devoted to the Rosebel district Daoust et al Reference Daoust Voicu Brisson and Gauthier 2011 where the ores classify as orogenic deposits in line with other major gold occurrences of the Guiana Shield Voicu et al Reference Voicu Bardoux and Stevenson 2001...

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Gold and associated elements in the regolith

Brief description This 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...

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Reunion Gold Reports Further Drilling Results and a New

Oct 31 2012 0183 32 The saprolitic deposits are formed by manganese oxide and hydroxide minerals occurring along the crest of hills and are related to the weathered lateritic profile reaching 100 m...

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The Geology of Las Cristinas Gold Deposit Km 88

1980s that mining in the district was apparently re 173 activated by several thousands of itinerant miners garimpeiros which discovered and surficially mined numerous gold-rich lateritic and saprolitic deposits In addition a significant quantity of gold was also re 173...

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THE GEOLOGY OF GOLD DEPOSITS

ECONOMIC GEOLOGY MONOGRAPH 6 THE GEOLOGY OF GOLD DEPOSITS The Perspective in 1988 REID R KEA YS W R H RAMSAY DAVID I GROVES EDITORS The search that never ends-panning for gold in the Yukon late nineteenth century...

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Economic geology

Jan 10 2017 0183 32 Lateritic gold deposits Lateritic gold deposits as a class are a relatively recent discovery One of the largest representatives of this group was the Boddington bauxite mine in Western Australia which until closure in 2001 was the biggest gold mine in Australia with an annual gold production of 2500 kg reduced saprolitic section of the...

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Dispersion of gold and associated elements in the

The dispersion of gold and over 40 other elements in the lateritic regolith has been studied at the Mt Percy gold mine near Kalgoorlie Primary Au mineralization in the Mystery Zone occurs in fuchsite-carbonate alteration zones at the contact with porphyries intruding the Hannan s Lake serpentinite The mineralized sequence has been deeply weathered and is concealed beneath an almost complete...

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Ore deposits formed by oxidation and supergene enrichment

The importance of secondary enrichment of gold in lateritic regions was realized only during the gold boom of the 1980s especially in Australia 2 The second circumstance involves mineral deposits containing sulfide minerals especially copper sulfides that are...

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Lateritic nickel deposits of Brazil

Many nickel deposits are known in Brazil accounting for about 350 10 6 tons of ore with an average of 15 Ni All are of the lateritic type These deposits are scattered throughout the country being rarer in the Northeastern Region and in the South below 25 176 S latitude They are mainly associated with mafic-ultramafic massifs of large dimensions and ultramafic alkaline complexes and...

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PDF Gold a tracer of the dynamics of tropical laterites

Gold particles density is reduced by as much 11 g/cm3 Fig 3 are useful in distinguishing between in situ chemical weathering and physical transport in The root-rich bioturbated sandy-clayey and African lateritic systems developed on slowly eroding stable landforms...

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Gold Behavior in Weathering Products of Quartz Vein in

bedrock 5 Also the lateritic profiles usually consist of three main units differing in their organization as well as in their lateral continuity the saprolitic lower unit the glebular/nodular medial unit and the loose upper unit In the Ity gold area Ivory Coast the Au contents of the laterite profiles are variable 8 -...

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Regolith geochemistry and EPR characterization of gold

Thick commonly lateritic regoliths are widespread in inter-tropical regions of the world and present a challenges to current exploration techniqu The particular problem in Australian is the widespread deep and varied regolith frequently with a complex geological history dating back to mid-Permian time Within this long period several episodes of deep weathering and selective chemical...

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Genesis of Supergene Gold Deposits in the Lateritic

The deposits are mostly small...

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QUASAR GOLD DEPOSIT MT MAGNET WESTERN

Dispersion in the top of the basement consists of weak limited saprolitic dispersion and scarce remnant pockets of lateritic residuum Dispersion The Quasar Au deposit yielded 21 094 oz Au 111 755 t of ore at 587 Figure 4 Comparison of anomalies for Au Bi and Pb in top of the basement a c e with the interface b d f...

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