Paleoproterozoic potassic-ultrapotassic magmatism: Morro do Afonso Syenite Pluton, Bahia, Brazil

Precambrian Research

Volumn 154, Issue 1-2, 2007, Pages 1-30

  Rios, D C ^a   Conceicao H ^a   Davis, D W ^b   Pla Cid J ^a   Rosa, M L S ^a   Macambira, M J B ^c   McReath, I ^d   Marinho, M M ^a,e   Davis, W J ^f  

^a FEDERAL UNIVERSITY OF BAHIA   (Brazil)

^b UNIVERSITY OF TORONTO   (Canada)

^c FEDERAL UNIVERSITY OF PARÁ   (Brazil)

^d UNIVERSITY OF SÃO PAULO   (Brazil)

^e Companhia Baiana de Pesquisa Mineral ^*  (Brazil)

^f GEOLOGICAL SURVEY OF CANADA   (Canada)

Author keywords

Geochronology; Lamprophyres; Paleoproterozoic; Syenite; Ultrapotassic

Indexed keywords

FELDSPAR; FRACTIONATION; GEOCHRONOLOGY; ISOTOPIC COMPOSITION; LAMPROPHYRE; MAGMA; MAGMATISM; METAMORPHISM; OROGENY; PLUTON; POTASSIC ROCK; PROTEROZOIC; SYENITE;

BAHIA; BRAZIL; SAO FRANCISCO CRATON; SERRINHA NUCLEUS; SOUTH AMERICA;

EID: 33847623806     PISSN: 03019268     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.precamres.2006.11.015     Document Type: Article

References (117)

1. Alves da Silva, F.C., 1994. Étude Structural duo "Greenstone Belt" Paleoproterozoique du Rio Itapicuru (Bahia, Brésil). Thése Doct., Tese de Doutorado. Université d'Orleans, França, p. 307.
2. Alves da Silva F.C., Chauvet A., and Faure M. Early-Proterozoic (Tranzamazonian) Orogeny and syntectonic granite emplacement in the RIGB, Bahia, Brazil. Académie des Sciences (Paris) 316 2 (1993) 1139-1146
3. Atkinson W.J., Hughes F.E., and Smith C.B. A review of kimberlitic rocks of Western Australia. Kimberlites I: The Mantle and Crust-Mantle Relationships. In: Kornprobst J. (Ed). Kimberlites I: The Mantle and Crust-Mantle Relationships. Proc. 3rd Int. Kimb. Conf. (1984), Elsevier, Amsterdam 195-224
4. Barbarin B. Enclaves of the Mesozoic calc-alkaline granitoids of the Sierra Nevada Batholith, California. Enclaves and Granite Petrology. In: Didier J., and Barbarin B. (Eds). Dev. Petrol. vol. 3 (1991), Elsevier, Amsterdam 135-153
5. Barbosa J., and Sabaté P. Archean and Paleoproterozoic crust of the São Francisco Craton, Bahia, Brazil: geodynamic features. Precambrian Res. 133 (2004) 1-27
6. Barrueto, H.R., 1997. Intrusões sub-vulcânicas alcalinas e lamprófiros nas mineralizações auríferas do GBRI, Bahia: petrografia, geoquímica e inclusões fluidas. Dissert. Mestrado. Pós-Graduação em Geociências, Unicamp, SP, p. 160.
7. Beccaluva L., Di Girolamo P., and Serri G. Petrogenesis and tectonic setting of the Roman Volcanic Province, Italy. Lithos 26 (1991) 191-221
8. Bergman, S.C., 1987. Lamproites and other potassium-rich igneous rocks: a review of their occurrences, mineralogy and geochemistry. In: Fitton, J.G., Upton, B.G.J. (Eds.), Alkaline Igneous Rocks. In: Fitton, J.G., Upton, B.G.J. (Eds.), Geolf. Soc. Sp. Publ., vol. 30. pp. 103-226.
9. Blake S., and Koyaguchi T. Insights on the magma mixing model from volcanic rocks. In: Diddier J., and Barbarin B. (Eds). Enclaves and Granite Petrology. In: Diddier J., and Barbarin B. (Eds). Developments in Petrology vol. 13 (1991), Elsevier, Amsterdam 403-413
10. Bourne J.H., and L'Heureux M. The petrography and geochemistry of the Clericy Pluton: an ultrapotassic pyroxenite-syenite suite of late Archaean age from the Abitibi region, Quebec. Precambrian Res. 52 1/2 (1991) 37-51
11. Card K.D. A review of the Superior Province of the Canadian Shield, a product of Archean accretion. Precambrian Res. 48 (1990) 99-156
12. Conceição, H., 1990. Petrologie du massif syénitique d'Itiuba: contribution à l'etude minéralogique des roches alcalines dans l'Etat de Bahia (Brésil). Thése Doct. Université Paris-Sud, Centre d'Orsay, p. 395.
13. Conceição H., Oliveira O.M.C., Martin H., Rosa M.L.S., Conceição R.V., and Plá Cid J. Petrologia do magmatismo alcalino potássico com afinidade lamprofírica e assinatura de subducção no sul do estado da Bahia: Maciço Sienítico de Anurí. Geochim. Brasil. 11 2 (1997) 171-186
14. Conceição H., Rios D.C., and Rosa M.L.S. Petrologia da Associação Sienito-Lamprófiro: Caso da Intrusão de Morro do Afonso (Greenstone Belt do Rio Itapicuru Bahia). Geoch. Brasil. 9 1 (1995) 91-109
15. Conceição H., Rios D.C., Rosa M.L.S., Davis D.W., Dickin A.P., McReath I., Marinho M.M., and Macambira M.J.B. Zircon geochronology and petrology of alkaline-potassic syenites, southwestern Serrinha Nucleus, East São Francisco Craton. Brazil. Int. Geol. Rev. 44 2 (2002) 117-136
16. Conceição H., Rosa M.L.S., Macambira M.J.B., Scheller T., Marinho M.M., and Rios D.C. 2.09 Ga Idade minima da cristalização do Batólito Sienítico Itiúba: um problema para o posicionamento do clímax do metamorfismo granulítico (2.05-2.08 Ga) no Cinturão Móvel Salvador-Curaçá, Bahia?. Rev. Bras. Geociências 33 3 (2003) 391-394
17. Conceição R.V., Rosa M.L.S., Nardi L.V., Conceição H., Lafon J.M., Soliani E., Oberli F., Maier M., and Martin H. Geochronology and isotopic signature of the Paleoproterozoic Santanápolis syenite (Bahia, Brazil). Proceedings of the Second South American Symposuim on Isotope Geology. Cordoba, Argentina, Actas (1999) 171-178
18. Tectonic Evolution of South America Rio de Janeiro. In: Cordani U.G., Milani E.J., Thomaz Filho A., and Campos D.A. (Eds). Proceedings of the 31st International Geological Congress. Rio de Janeiro, RJ (2000) 856
19. Cordani U.G., Sato K., and Marinho M.M. The geologic evolution of the ancient granite-greenstone terrane of central southern Bahia, Brazil. Precambrian Res. 27 (1985) 187-213
20. Corriveau L., and Gorton M.P. Coexisting K-rich alkaline and shoshonitic magmatism of arc affinities in the Proterozoic: a reassessment of syenitic stocks in the southwestern Greenville Province. Contrib. Mineral. Petrol. 113 (1993) 262-279
21. Cox K.G., Bell J.D., and Pankhurst R.J. The Interpretation of Igneous Rocks (1979), George, Allen and Unwin, London p. 450
22. Davison I., Teixeira J.B.G., and Silva M.G. The Itapicuru Greenstone Belt, Bahia, Brazil: structure and stratigraphical outline. Precambrian Res. 42 1-2 (1988) 1-17
23. De Paolo D.J., and Schubert G. The continental age distribution: methods of determining mantle separation ages from Sm-Nnd isotopic data and application to the southwestern United States. J. Geophys. Res. 96 (1991) 2071-2088
24. Dorais M.J. Compositional variations in pyroxenes and amphiboles of the Belknap Mountain complex, New Hampshire: evidence for origin of silica-saturated alkaline rocks. Am. Miner. 72 (1990) 1092-1105
25. Doumbia S., Pouclet A., Kouamelan A., Peucat J.J., Vidal M., and Delor C. Petrogenesis of juvenile-type Birimian (Paleoproterozoic) granitoids in Central Côte-d'Ivoire, West Africa: geochemistry and geochronology. Precambrian Res. 87 (1998) 33-63
26. Eklund O., Konopelko D., Rutansen H., Fröjdö C., and Shebanov A.D. 1.8 Ga Svelojennaina post collisional shoshonitic magmatism in Fennoscandian Shield. Lithos 45 (1998) 87-108
27. Evensen N.M., Hamilton P.J., and Onions R.K. Rare earth abundances in chondritic meteorites. Geochim. Cosmochim. Acta 42 (1978) 1199-1212
28. Faure G. Principles of Isotopic Geology (1986), Wiley and Sons, New York p. 589
29. Fernandez, A.N., Barbarin, B., 1991. Relative rheology of coeval mafica and felsic magmas: nature of resulting interaction process. Shape and mineral fabrics of mafic microgranular enclaves. In: Diddier, J., Barbarin, B. (Eds.), Enclaves and Granite Petrology. In: Didier, J., Barbarin, B. (Eds.), Developments in Petrology, vol. 13. pp. 263-276.
30. Figueiredo M.C.H. Geochemical evolution of eastern Bahia Brazil: a probably Early-Proterozoic subduction-related magmaticarc. J. South Am. Earth Sci. 2 2 (1989) 131-145
31. Foley S.F., and Peccerillo A. Potassic and ultrapotassic magmas and their origin. Lithos 28 (1992) 181-185
32. Foley S.F., Venturelli G., Green D.H., and Toscani L. The ultrapotassic rocks: characteristics, classification and constrains for petrogenetic models. Earth Sci. Rev. 24 (1987) 81-134
33. Gaudette H.E., Lafon J.M., Macambira M.J.B., Moura C.A.V., and Scheller T. Comparison of single filament Pb evaporation/ionization zircon ages with conventional U-Pb results: examples from the Precambrian of Brazil. J. South Am. Earth Sci. 11 (1998) 351-363
34. Green T.H. Island arc and continental building magmatism-a review of petrogenetic models based on experimental petrology and geochemistry. Tectonophysics 63 (1980) 367-385
35. Irvine T.N., and Baragar W.R.A. A guide to the chemical classification of the common volcanic rocks. Can. J. Earth Sci. 8 (1971) 523-548
36. 238U. Phys. Rev. 4 (1971) 1889-1906
37. Jardim de Sá E.F. Nota sobre o estilo estrutural e relações gnaisses vs. supracrustais no Greenstone Belt de Serrinha, Ba. Ciências da Terra 2 (1982) 8-13
38. 206Pb age investigations on single zircons using a double filament thermal ion source. Contrib. Mineral. Petrol. 93 (1986) 482-490
39. 206Pb age investigations using thermal ion mass spectrometry, and implications to zirconology. Contrib. Mineral. Petrol. 96 (1987) 63-71
40. Laflèche M.R., Dupuy C., and Dostal J. Archaean orogenic ultrapotassic magmatism: an example from the Southern Abitibi greenstone belt. Precambrian Res. 52 (1991) 71-96
41. Larsen L.M., and Rex D.C. A review of the 2500 Ma span of alkaline-ultramafic potassic and carbonatitic magmatism in West Greenland. Lithos 28 (1992) 267-402
42. Lavecchia G., and Stoppa F. The Tyrrhenian zone: a case of lithosphere extension control of intracontinental magmatism. Earth Planet. Sci. Lett. 99 (1990) 336-350
43. Lavecchia G., and Stoppa F. The tectonic significance of Italian magmatism: an alternative view to the popular interpretation. Terra Nova 8 (1996) 435-446
44. Leat P.T., Jackson S.E., Thorpe R.S., and Stillman C.J. Geochemistry of bimodal basalt-subalkaline/peralkaline-rhyolite provinces within the southern British Caledonides. J. Geol. Soc. London 143 (1986) 259-276
45. Lubala R.T., Frick C., Rogers J.H., and Walraven F. Petrogenesis of syenites and granites of the Schiel Alkaline Complex Northern Transvaal. S. Afr. J. Geol. 102 (1994) 307-316
46. Ludwig, K.R., 1999. Isoplot/Ex (version 2.00). A geochronological toolkit for Microsoft Excel. Berkeley Geochronology Center Special Publication Nr 1a, 46 pp.
47. Lynch D.J., Musselman T.E., Gutmann J.T., and Patchett P.J. Isotopic evidence for the origin of Cenozoic volcanic rocks in the Pinacate volcanic field, Northwestern Mexico. Lithos 29 (1993) 295-302
48. Mascarenhas, J.F., Pedreira, A.J.C.L., Gil, C.A.A., Neves, J.P., Oliveira, J.E., Silva Filho, M.A., Marinho, M.M., 1979. Geologia da região centro-oriental da Bahia. Projeto Bahia, Bahia II, Sul da Bahia. Relatório integrado. CPRM/DNPM, Brasília, DF, p. 128.
49. McNeil A.M., and Kerrich R. Archean lamprophyre dykes and gold mineralization, Matheson, Ontario: the conjunction of LILE-enriched mafic magmas, deep crustal structures, and Au concentration. Can. J. Earth Sci. 23 (1986) 324-343
50. Mitchell R.H., and Bergman S.C. Petrology of Lamproites (1991), Plenum Press, New York p. 410
51. Müller D., and Groves D.I. Direct and indirect associations between potassic igneous rocks, shoshonites, and gold-copper deposits. Ore Geol. Rev. 8 (1993) 383-406
52. Müller D., and Groves D.I. Potassic Igneous Rocks and Associated Gold-copper Mineralization. Lecture Notes in Earth Sciences (1995), Springer-Verlag, Berlin p. 210
53. Müller D., and Groves D.I. Potassic Igneous Rocks and Associated Gold-Copper Mineralization (2000), Springer, Berlin 252 pp
54. Müller D., Rock N.M.S., and Groves D.I. Geochemical discrimination between shoshonitic and potassic volcanic rocks from different tectonic settings: a pilot study. Mineral. Petrol. 46 (1992) 259-289
55. Oliveira E.P., Carvalho M.J., and Duarte M.I.D. Extrusion of the Archaean Uauá Block during PalaeoproterozoicPaleoproterozoicPaleoproterozoic continent-continent collision northern segment of the Itabuna-Salvador-Curaçá Orogen Bahia. Proceedings of the XLI Congresso Brasileiro de Geologia. João Pessoa, Anais (2002) 324
56. Oliveira E.P., Lafon J.-M., and Souza Z.S. A Paleoproterozoic age for the Rio Capim volcano-plutonic sequence, Bahia, Brazil: whole-rock Pb-Pb Pb-evaporation and U-Pb constraints. Anais XI Congresso Brasileiro de Geologia (1998), SBG, Belo Horizonte, MG 14
57. Oliveira E.P., Lafon J.-M., and Souza Z.S. Archaean-Paleoproterozoic transition in the Uauá Block, NE Sãao Francisco Craton, Brazil: U-Pb, Pb-Pb and Nd isotope constraints. Proceedings of First International Symposium on Tectonics of the Brazilian Geological Society. Lençois, BA (1999) 49-51 (abstract-volume)
58. Paim M.M., Pla Cid J., Rosa M.L.S., Conceição H., and Nardi L.V.S. Mineralogy of lamprophyres and mafic enclaves associated with the PalaeoproterozoicPaleoproterozoicPaleoproterozoic Cara Suja Syenite, Northeast Brazil. Int. Geol. Rev. 44 11 (2002) 1017-1036
59. Pearce J.A. Role of the subcontinental lithosphere in magma geênesis at active continental margins. In: Hawkesworth C., and Norry W.J. (Eds). Continental Basalts and Mantle Xenoliths (1983), Shiva Publications, London 230-250
60. Pearce J.A., and Cann J.R. Tectonic setting of basic volcanic rocks determined using trace element analyses. Earth Planet. Sci. Lett. 19 (1973) 290-300
61. Pearce J.A., Harris N.B.W., and Tindle A.G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. J. Petrol. 25 (1984) 956-983
62. Pearce J.A., and Norry M.J. Petrogenetic implications of Ti, Zr, Y and Nb variations in volcanic rocks. Contrib. Mineral. Petrol. 69 (1979) 33-47
63. Peaucat J.J., Capdevila R., Drareni A., Mahdjoub Y., and Kahoui M. The Eglab massif in the West Africa Craton (Algeria), an original segment of the Eburnean orogenic belt: petrology, geochemistry, geochronology. Precambrian Res. 136 (2005) 309-352
64. Peccerillo A. Potassic and ultrapotassic magmatism: compositional characteristics, genesis and geologic significance. Episodes 15 (1992) 243-251
65. Peccerillo A., Poli G., and Serri G. Petrogenesis of orenditic and kamafugitic rocks from Central Italy. Can. Mineral. 26 (1988) 45-65
66. Peccerillo A., Poli G., and Tolomeo L. Genesis, evolution and tectonics significance of K-rich volcanics from the Alban Hills (Roman Comagmatic Region) as inferred from trace element geochemistry. Contrib. Mineral. Petrol. 86 (1984) 230-240
67. Pereira R.S. Técnicas exploratórias na prospecção de kimberlitos-estudo de caso. Rev. Bras. Geociências 31 4 (2001) 405-416
68. Pereira R.S., and Fuck R.A. Kimberlitos e rochas relacionadas no Cráton do São Francisco. Proceedings of the III Symposium on the São Francisco Cráton. SBG (2005) 114-117
69. Pereira, R.S., Zang, M., Bizzi, L, 1996. Target selection in the Bahia Project Area using regional scale geophysics, remote sensing and geochemistry. Geophysical Services Division, Sopemi, Brasília, unpublished.
70. Perini G., Tepley III F.J., Davidson J.P., and Conticelli S. The origin of K-feldspar megacrysts hosted in alkaline potassic rocks from Central Italy: a track for low-pressure processes in mafic magmas. Lithos 66 (2003) 223-240
71. Peterson T.D., Van Breemen O., Sandeman H., and Cousens B. Proterozoic (1.85-1.75 Ga) igneous suites of the Western Churchill Province: granitoid and ultrapotassic magmatism in a reworked Archaean hinterland. Precambrian Res. 119 (2002) 73-100
72. Peucat J.-J., Capdevila R., Drareni A., Mahdjoub Y., and Kahoui M. The Eglab massif in the West African Craton (Algeria), an original segment of the Eburnean orogenic belt: petrology, geochemistry and geochronology. Precambrian Res. 136 (2005) 309-352
73. Pisani J.R.T., Tainton K.M., Allan A.F., Silva S.B., and Miranda J.V. Geology and exploration of the Braúna Diamondiferous Kimberlites, Serrinha Block, Bahia, Brazil. Rev. Bras. Geociências 31 4 (2001) 663-664
74. Plá Cid J., Rios D.C., and Conceição H. Petrogenesis of mica-amphibole-bearing lamprophyres associated with the Paleoproterozoic Morro do Afonso syenite intrusion, eastern Brazil. J. South Am. Earth Sci. 22 (2006) 98-115
75. Rios D.C. Petrologia do Magmatismo Potássico-Ultrapotássico e Lamprofírico de Morro do Afonso-Bahia. In: Conceição H., and Cruz M.J.M. (Eds). Sienitos Alcalinos Potássicos e Ultrapotássicos Paleoproterozóicos do Estado da Bahia vol. 4 (1998), Publicação Especial da Sociedade Brasileira de Geologia, Núcleo Bahia-Sergipe, Salvador, BA 167-204
76. Rios, D.C., 1997. Petrologia do magmatismo potássico-ultrapotássico e lamprofírico de Morro do Afonso-Bahia. Unpub. Dissertação de Mestrado. Universidade Federal da Bahia, 237 p.
77. Rios, D.C., 2002. Granitogênese no Núcleo Serrinha, Bahia, Brasil: Geocronologia e Litogeoquímica. Unpub. PhD Thesis. Federal University of Bahia, 239 p.
78. Rios, D.C., Conceição, H., Davis, D.W., Rosa, M.L.S., Macambira, M.J.B., Peixoto, A.A., Marinho, M.M., 2006. Morro do Lopes Granites: Palaeoproterozoic alkaline magmas and their significance for Serrinha Nucleus evolution, Northeastern Bahia, Brazil. In: South American Symposium on Isotope Geology, 2006, Punta del Este. Short Papers of the V South American Symposium on Isotope Geology, Punta del Este, vol. 1, Universidad de la República, pp. 162-164.
79. Rios, D.C., Conceição, H., Davis, D.W., Rosa, M.L.S., Macambira, M.J.B., Dickin, A.P., 2003. A new proposal for the subdivision of granitic rocks at Serrinha Nucleus, Bahia, Brazil, based on U-Pb and Pb-Pb geochronological and litogeochemical data. Proceedings of the IV South American Symposium on Isotope Geology, Brazil, Short Papers, vol. 1, pp. 264-267.
80. Rios D.C., Conceição H., Davis D.W., Rosa M.L.S., and Marinho M.M. Expansão do magmatismo pós-orogênico no Núcleo Serrinha (NE Bahia) Cráton do São Francisco: Idade U-Pb do maciço granítico Pedra Vermelha. Rev. Bras. Geociências 35 3 (2005) 423-426
81. Rios D.C., Davis D.W., Conceição H., Macambira M.J.B., Peixoto A.A., Cruz Filho B.E., and Oliveira L.L. Ages of granites of the Serrinha Nucleus, Bahia (Brazil): an overview. Rev. Bras. Geociências 30 (2000) 74-77
82. Rios D.C., Davis D.W., Conceição H., Rosa M.L., and Dickin A.P. Archaean granites at Serrinha Nucleus, Bahia, Brazil. Geochim. Cosmochim. Acta 68 11 (2004) A685
83. Rios D.C., Davis D.W., Conceição H., Rosa M.L., and Marinho M.M. The oldest zircons from South Ameérica Continent. Geochim. Cosmochim. Acta 66 A345 (2002) 640
84. Rios D.C., Conceição H., Macambira M.J.B., Burgos C.M.G., Peixoto A.A., Cruz Filho B.E., Oliveira L.L., and Lisboa M.P. Granitogênese da parte meridional-oriental do Núcleo Serrinha: idade, petrografia e geoquímica. In: Conceição H., Cruz M.J.M., Sá H.J.S., and Sabaté P. (Eds). Contribuição ao estudo dos granitos e rochas correlatas. vol. 5 (1998), Pub. Esp. SBG, Núcleo Bahia, Sergipe 91-113
85. Rock N.M.S. Nature and origin of calc-alcaline lamprophyres: an review. In: Fitton J.G., and Upton B.G.J. (Eds). Alkaline Igneous Rocks vol. 30 (1987), Geological Society Special Publication 191-226
86. Rock N.M.S., Bowes D.R., and Wright A.E. Lamprophyres (1991), Blackie-Van Nostrand Reinhold, New York p. 285
87. Rock N.M.S., and Groves D.I. Can lamprophyres resolve the genetic controversy over mesothermal gold deposits?. Geology 16 (1988) 538-541
88. Rock N.M.S., and Hunter R.H. Late Caledonian dyke-swarms of northern Britain: spatial and temporal intimacy between lamprophyric and granitic magmatism around the Ross of Mull pluton. Inner Hebrides. Geol. Rundsch. 76 (1987) 805-826
89. Rogers G., Saunders A.D., Terrel D.J., Verma S.P., and Marriner G.F. Geochemistry of Holocene volcanic rocks associated with ridge subduction in Baja Califórnia, México. Nature 315 (1985) 389-392
90. Rosa, M.L.S., Conceição, H., Macambira, M.J.B., Galarza, M.A., Cunha, M.P., Menezes, R.C.L., Marinho, M.M., Cruz Filho, B.E., Rios, D.C., 2006. Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U-Pb and Pb-Pb ages of the blue sodalite syenites. Lithos, doi:10.1016/j.lithos.2006.12.011.
91. Rosa M.L.S., Conceição H., Macambira M.J.B., Scheller T., Martin H., and Leal L.R.B. Idade (Pb-Pb) e assinatura isotópica (Rb-Sr, Sm-Nd) do magmatismo sienítico pPaleoproterozóico no sul do Cinturão Móvel Salvador-Curaçá: Maciço sienítico de São Félix (Bahia). Rev. Bras. Geociências 31 3 (2001) 397-400
92. Rosa M.L.S., Conceição H., Oberli F., Meier M., Martin H., Macambira M.J.B., Santos E.B.S., Paim M.M., Leahy G.A.S., and Leal L.R.B. Geochronology (U-Pb/Pb-Pb) and isotopic signature (Rb-Sr/Sm-Nd) of the Ppaleoproterozoic Guanambi Batholith, southwest Bahia State (NE, Brazil). Rev. Bras. Geociências 30 1 (2000) 62-65
93. Rosa M.L.S., Conceição H., Paim M.M., Santos E.B., Alves da Silva F.C., Leahy G.A.S., and Leal L.R.B. Magmatismo potássico-ultrapotássico pós a tardi-orogênico (associado à subducção) no oeste da Bahia: Batólito Monzo-Sienítico de Guanambi-Urandi e os sienitos de Correntina. Geoch. Brasil. 101 1 (1996) 27-42
94. Sato K., Tassinari C.C.G., Kawashita K., and Petronilho. O método geocronológico Sm-Nd no IG-USP e suas aplicações. An. Acad. Bras. Cienc. 67 3 (1995) 313-336
95. Schwarzar R.R., and Rogers J.J. A world-wide comparison of olivine basalt and their differentiation trends. Earth Planet. Sci. Lett. 23 (1974) 286-296
96. Serri G., Innocenti F., and Manetti P. Geochemical and petrological evidences of the subduction of delaminated Adriatic continental lithosphere in the genesis of the Neogene-Quaternary magmatism of central Italy. Tectonophysics 223 (1993) 117-147
97. Silva A.B., Liberal G.S., Grossi Sad J.M., Issa Filho A., Rodrigues C.S., and Riffel D.F. Geologia e Petrologia do Complexo Angico dos Dias (Bahia, Brasil), uma associação carbonática Precambrianapré-cambriana. Geochim. Brasil. 2 1 (1988) 81-108
98. Silva M.G. O Greenstone Belt do Rio Itapicuru: uma bacia do tipo back-arc fóssil. Rev. Bras. Geociências 22 (1992) 157-166
99. Silva M.G., Coelho C.E.S., Teixeira J.B.G., Alves da Silva F.C., Silva R.A., and Souza J.A.B. The Rio Itapicuru greenstone belt, Bahia, Brazil: geologic evolution and review of gold mineralization. Miner. Deposita 36 (2001) 345-357
100. Souto, P.G., 1972. Geologia e petrografia da área de Potiraguá, Bahia. Tese de Doutorado. Universidade de São Paulo, São Paulo, Brasil, p. 65.
101. Stacey J.S., and Kramers J.D. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth Planet. Sci. Lett. 26 (1975) 207-221
102. Stern, R.A., 1997. The GSC Sensitive High Resolution Ion Microprobe (SHRIMP): analytical techniques of zircon U-Th-Pb age determinations and performance evaluation. In: Current Research 1997-F. Geological Survey of Canada: Radiogenic Age and Isotopic Studies Report 10, pp. 1-31.
103. Streckeisen A. To each plutonic rocks its proper name. Earth Science Rev. 12 (1976) 1-33
104. Sun S.S. Lead isotopic study of young volcanics from midocean ridges, ocean islands and island arcs. Philos. Trans. R. Soc. Lond. A297 (1980) 409-445
105. Sutcliffe R.H., Smith A.R., Doherty W., and Barnett R.L. Mantle derivation of Archean-bearing granitoid and associated mafic rocks: evidence from the southern Superior Province. Contrib. Mineral. Petrol. 105 (1990) 255-274
106. Tchameni R., Mezger K., Nsifa N.E., and Pouclet A. Crustal origin of Early Proterozoic syenites in the Congo Craton (Ntem Complex), South Cameroon. Lithos 57 (2001) 23-42
107. Thompson R.N. Magmatism of the British Tertiary Volcanic Province. Scott. J. Geol. 18 (1982) 49-107
108. Thompson R.N., Dickin A.P., Gibson I.L., and Morrison M.A. Elemental fingerprints of isotopic contamination of Hebridean Paleocene mantle-derived magmas by Archean sial. Contrib. Mineral. Petrol. 79 (1982) 159-168
109. Thompson R.N., and Fowler M.B. Subduction-related shoshonitic and ultrapotassic magmatism: a study of siluro-ordovician syenites from Scottish caledonites. Contrib. Mineral. Petrol. 14 (1986) 507-522
110. Vasconcelos, P., Becker, T., 1992. A idade da mineralização aurífera no depósito da Fazenda Brasileiro, Bahia, Brasil. Workshop em Metalogênese: Pesquisas atuais e novas tendencies. UNICAMP, Bol. Res., p. 29.
111. Watson E.B., and Harrison T.M. Zircon saturation revisited: temperature and composition effects in a variety of crustal magma types. Earth Planet. Sci. Lett. 64 2 (1983) 295-304
112. 2 + ) ratios of common basalts and andesites: implications for modal mantle metasomatism and undepleted mantle compositions. J. Petrol. 28 (1987) 37-73
113. Wilson M. Igneous Petrogenesis (1989), Chapman & Hall, London 466 pp
114. Wyman D.A., and Kerrich R. Alkaline magmatism, major structures, and gold deposits: implication for greenstone belt gold metallogeny. Econ. Geol. 83 (1988) 454-461
115. Wyman D.A., and Kerrich R. Archean lamprophyre dikes of the Superior Province, Canada: distribution, petrology, and geochemical characteristics. J. Geophys. Res. 94 B4 (1989) 4667-4696
116. Wyman D.A., and Kerrich R. Archean shoshonitic lamprophyres of the Abitibi Subprovince, Canada: petrogenesis, age and tectonic setting. J. Petrol. 34 6 (1993) 1067-1109
117. Zhao J.-X., Shiraishi K., Ellis D.J., and Sheraton J.W. Geochemical and isotopic studies of syenites from the Yamoto Mountains East Antartica: implication for the origin of syenitic magmas. Geochim. Cosmochim. Acta 59 (1995) 1363-1385