Morphology and composition of gold in a lateritic profile, Fazenda Pison "Garimpo", Amazon, Brazil

Journal of South American Earth Sciences

Volumn 25, Issue 3, 2008, Pages 359-376

  Larizzatti, J H ^a   Oliveira, S M B ^b   Butt, C R M ^c  

^a Brazilian Geological Survey (CPRM RJ)   (Brazil)

^b UNIVERSITY OF SÃO PAULO   (Brazil)

^c CSIRO   (Australia)

Author keywords

Amazon; Composition; Gold grains; Laterites; Morphology; Weathering

Indexed keywords

GOLD; GRAIN SIZE; LATERITE; MORPHOLOGY; QUARTZ VEIN; RAINFOREST; SILVER; WEATHERING PROFILE;

AMAZONAS [BRAZIL]; BRAZIL; SOUTH AMERICA;

EID: 41549124111     PISSN: 08959811     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jsames.2007.06.002     Document Type: Article

References (57)

1. de Almeida F.F.M., Hasui Y., de Brito Neves B.B., and Fuck (sic) R.A.A. Brazilian structural provinces: an introduction. Earth Science Review 17 (1981) 1-29
2. Andrade, A.F., Santiago, A.F., Melo, C.F., Bizinella, G.A., Moreira, H.L., Santos, J.O.S., Oliveira, J.R., Moura, P.A., Lopes, R.C., Rosa Filho, S.F., Neves, S.A.V., 1978. Projeto Tapajós - Sucunduri: relatório de integração geolóaus, CPRM/DNPM. 3v. (internal report).
3. Andrade W.O., Mackesky M.L., and Rose A.W. Gold distribution and mobility in the surficial environment, Carajás region, Brazil. Journal of Geochemical Exploration 40 (1991) 95-114
4. Angélica, R.S., Costa, M.L., Pöllmann, H., 1995. Mineralogia e geoquímica das partículas de ouro nos perfis laterito-gossânicos das áreas Igarapé Bahia e Águas Claras, Carajás, Pará. In: V Congr. Bras. Geoq., Anais, Niterói, RJ.
5. Antweiler J.C., and Campbell W.L. Application of gold compositional analyses to mineral exploration in the United States. Journal of Geochemical Exploration 8 (1977) 17-29
6. Baker W.E. The role of humic acid in the transport of gold. Geochimica et Cosmochimica Acta 42 (1978) 645-649
7. Bowell R.J. Supergene gold mineralogy at Ashanti, Ghana: implications for the supergene behavior of gold. Mineralogical Magazine 56 (1992) 545-560
8. Bowell R.J. The role of fulvic acid in the supergene migration of gold in tropical rain forest soils. Geochimica et Cosmochimica Acta 57 (1993) 4179-4190
9. Boyle R.W. The geochemistry of gold and its deposits. Geological Survey of Canada Bulletin 280 (1979) 564p
10. Benedetti M., and Boulège J. Mechanism of gold transfer and deposition in a supergene environment. Geochimica et Cosmochimica Acta 55 (1991) 1539-1547
11. Butt, C.R.M., 1989. Genesis of supergene gold deposits in the lateritic regolith of the yilgarn block, Western Australia. In: Keays, R.R., Ramsay W.R.H., Groves, D.I. (Eds.), The Geology of Gold Deposits: The Perspective in 1988. Economic Geology Monograph 8. Proceedings of Bicentennial Gold 88, 460-470.
12. Colin F., Edou-Minko A., and Nahon D. Lór particulaire dans le profils latéritiques: altérations géochimiques et disprsion superficielles em cditions équatorialles. Comptes Rendues de ĺAcadémie des Sciences, Paris 309 serie II (1989) 553-560
13. Colin F., Lecomte P., and Boulangé B. Dissolution features of gold grains in a lateritic profile at Dondo Mobi, Gabon. Geoderma 45 (1989) 241-250
14. Colin F., and Vieillard P. Behavior of gold in the lateritic equatorial environment: weathering and surface dispersion of residual gold grains, at Dondo Mobi, Gabon. Applied Geochemistry 6 (1991) 279-290
15. Conklin M.H., and Hoffmann M.R. Metal ion-sulfur (IV) chemistry. 3. Thermodynamics and kinetics of transient iron (III)-sulfur (IV) complexes. Environmental Science & Technology 22 (1988) 899-907
16. Costa M.L. Lateritization as a major process of ore deposit formation in the Amazon region. Exploration and Mining Geology 6 (1997) 79-104
17. CPRM, 1999. Geology and Mineral Resources of Vila Mamãe Anã Sheet (SB.21-V-D). 1:250.000 scale. CPRM, Manaus, 60p, unpublished (in Portuguese).
18. Craw D. Growth of alluvial gold grains by chemical accretion and reprecipitation, Waimumu, New Zealand. New Zealand Journal of Geology and Geophysics 35 (1992) 157-164
19. Davy R., and El-Ansary M. Geochemical patterns in the laterite profile at Boddington gold deposit, Western Australia. Journal of Geochemical Exploration 26 (1986) 119-144
20. Desborough G.A. Silver depletion indicated by microanalysis of gold from placer occurrence, Western United States. Economic Geology 65 (1970) 304-311
21. Desborough G.A., Heidel R.H., Raymond W.H., and Tripp J. Primary distribution of silver and copper in native gold from six deposits in the Western United States. Mineralium Deposita 6 (1971) 321-334
22. Edou Minko A., Colin F., Trescases J.J., and Lecomte P. Altération latéritique du gîte aurifère d'Ovala (Gabon), et formation d'une anomalie superficielle de dispersion. Mineralium Deposita 27 (1992) 90-100
23. Eyles, N., 1990. Post-depositional gold nugget accretion in Late Cenozoic glacial placer deposits of Western Canada. Sediments 1990 - 13th International. Sedimentological Congress, pp. 74-75.
24. Freyssinet, P., Butt, C.R.M., 1988. Morphology and geochemistry of gold in a lateritic profile, Reedy mine, Western Australia. CSIRO Australia Division of Exploration Geoscience Restricted Report MG 58R. 15pp.
25. Freyssinet P., Zeegers H., and Tardy Y. Néoformation d'or dans les cuirrasses latéritiques, dissolution, migration, précipitation. Comptes Rendues de l' Académie des Sciences, Paris 305 série II (1987) 867-874
26. Freyssinet P. Gold dispersion related to ferricrete pedogenesis in South Mali: application to geochemical exploration. Chronique de. Recherche des Mines 510 (1993) 25-40
27. Giusti L. The morphology, mineralogy, and behaviour of "fine grained" gold from placer deposits of Alberta: sampling and implications for mineral exploration. Canadian Journal of Earth Sciences 23 (1986) 1662-1672
28. Goleva G.A. Geochemical trends in the occurrence and migration forms of gold in natural waters. Geochemistry International 7 (1970) 518-529
29. Gray D.J., Butt C.R.M., and Lawrance L.M. The geochemistry of gold in lateritic terrains. In: Butt C.R.M., and Zeegers H. (Eds). Regolith Exploration Geochemistry in Tropical and Subtropical Terrains. Handbook of Exploration Geochemistry 4 (1992), Elsevier, Amsterdam 461-482
30. Grimm, B., Friedrich, G., 1990. Weathering effects on supergene gold in soils of a semiarid environment, Gentio do Ouro, Brazil. In: Noack, Y., Nahon, D. (Eds.), Geochemistry of the Earth's Surface and of Mineral Formation. Chemical Geology, 84, 70-73.
31. Groen J.C., Craig J.R., and Rimstidt J.D. Gold-rich rim formation on electrum grains in placers. Canadian Mineralogist 28 (1990) 207-228
32. Knight J.B., Mortensen J.K., and Morison S.R. Lode and placer gold composition in the Klondike district, Yukon Territory Canada: implications for the nature and genesis of Klondike placer and lode gold deposits. Economic Geology 94 (1999) 649-664
33. Lawrance L.M., and Griffin B.J. Crystal features of supergene gold at Hannan South, Western Australia. Mineralium Deposita 29 (1994) 391-398
34. Larizzatti, J.H., 2002. Gold and pathfinder elements in the regolith of Fazenda Pison garimpo - dispersion processes and implications for exploration. Unpublished PhD. thesis. University of São Paulo, 204p. (in Portuguese).
35. Machairas G. Étude des phénomènes de migration chimique de l'or. Cas de la Guyane Française et d'Ity en Côte-d'Ivoire. Bull. Soc. Franç. Minér. Crist. 86 (1963) 78-80
36. Mann A.W. Mobility of gold and silver in lateritic weathering profiles, some observations from Western Australia. Economic Geology 79 (1984) 38-49
37. Michel D. Concentration of gold in situ laterite from Mato Grosso. Mineralium Deposita 22 (1987) 185-189
38. McCready A.J., Parnell J., and Castro L. Crystalline placer gold from the Rio Neuquén, Argentina: implications for the gold budget in placer gold formation. Economic Geology 98 (2003) 623-633
39. Morrison G.W., Rose W.J., and Jaireth S. Geological and geochemical controls on the silver content (fineness) of gold in gold-silver deposits. Ore Geology Reviews 6 (1991) 333-364
40. de Oliveira S.M.B., and Campos E.G. Gold-bearing iron duricrust in Central Brazil. Journal of Geochemical Exploration 41 (1991) 233-244
41. de Oliveira S.M.B., and de Oliveira N.M. The morphology of gold grains associated with oxidation of sulphide-bearing quartz veins at São Bartolomeu, central Brazil. Journal of South American Earth Sciences 13 (2000) 217-224
42. Plyusnin A.M., Pogrelniak Y.F., Mironov A.G., and Zhmodik S.M. The behavior of gold in the oxidation of gold bearing sulphides. Geochemistry International 18 (1981) 116-123
43. Porto C.G., and Hale M. Mineralogy, morphology and chemistry of gold in stone line lateritic profile of the Posse deposit, Central Brazil. Journal of Geochemical Exploration 57 (1996) 115-125
44. RTDM, 1995. Relatório de avaliação do potencial aurífero da área Fazenda Pison (AM). Rio Tinto Denvolvimentos Minerais. Confidential report, 29pp. (in Portuguese).
45. Roslyakov, N.A., Peshevitsky, B.I., Nepeyna, L.A., Timbalist, V.G., 1971. Geochemistry of gold in processes of weathering crust formation. International Geological Congress, Moscow, Abstracts of reports. II, 179-180.
46. Santos, J.O.S., Hartman, L.A., Gaudetti, H.E., 1997. Reconnaissance U-Pb in zircon, Pb-Pb in sulphides and review of Rb-Sr geochronology in the Tapajós Gold Province, Pará/Amazonas States, Brazil. South American Symposium on Isotope Geology - Brazil (SSAGI), Campos do jordão, SP. Proceedings. 280-282.
47. Santos J.O.S., Groves D.I., Hartmann L.A., Moura M.A., and McNaughton N.J. Alta Floresta Domains, Tapajós-Parima orogenic belt, Amazon Craton, Brazil. Mineralium Deposita 36 (2001) 278-299
48. Santosh M., and Omana P.K. Very high purity gold from lateritic weathering profiles of Nilambur, southern India. Geology 19 (1991) 746-749
49. Sergeev N.B., Zaikov V.V., Laputina L.P., and Trofimov O.V. Gold and silver in the supergene zone of the pyritic lode off the Gai deposit, the southern Urals. Geology of Ore Deposits 36 (1994) 152-164
50. Stoffregen R. Observations on the behavior of gold during supergene oxidation at Summitville, Colorado, U.S.A., and implications for electrum stability in the weathering environment. Applied Geochemistry 1 (1986) 549-558
51. Vasconcelos P.M., and Kyle J.R. Supergene geochemistry and crystal morphology of gold in a semiarid weathering environment, application to gold exploration. Journal of Geochemical Exploration 40 (1991) 115-132
52. Vlassopoulos D., and Wood S.A. Gold speciation in natural waters. I. Solubility and hydrolisis reactions of gold in aqueous solution. Geochimica et Cosmochimica Acta 54 (1990) 3-12
53. Webster J.G., and Mann A.W. The influence of climate, geomorphology and primary geology on the supergene migration of gold and silver. Journal of Geochemical Exploration 22 (1984) 21-42
54. 2 at 25 °C and 1 atm. Geochimica et Cosmochimica Acta 50 (1986) 1837-1846
55. Wilson A.F. Origin of quartz-free gold nuggets and supergene gold found in laterites and soils - a review and some new observations. Australian Journal of Earth Sciences 31 (1984) 303-316
56. Youngson J.H., and Craw D. Evolution of placer gold deposits during regional uplift, Central Ontago, New Zealand. Economic Geology 90 (1995) 731-745
57. Zang W., and Fyfe W.S. A three-stage genetic model for the Igarapé Bahia lateritic gold deposit, Carajás, Brazil. Economic Geology 88 (1993) 1768-1779