Geology, petrology and U-Pb geochronology of metavolcanic rocks in the Mundo Novo greenstone belt, eastern São Francisco Craton, NE Brazil: considerations about its tectonic setting

Spreafico, Ricardo Ramos; Barbosa, Johildo Salomão Figueiredo; Moraes, Antônio Marcos Vitória de; Souza Júnior, Francisco Dias de

doi:10.1590/2317-4889202020190041

Ricardo Ramos Spreafico ^**Corresponding author.

Companhia Baiana de Pesquisa Mineral - Salvador (BA), Brazil. E-mails: spreafico.ricardo@gmail.com, johildo.barbosa@gmail.com, amarcosvm@gmail.com, fdsjunior@gmail.com

Universidade Federal da Bahia - Salvador (BA), Brazil.

https://orcid.org/0000-0002-4529-372X

Johildo Salomão Figueiredo Barbosa

Companhia Baiana de Pesquisa Mineral - Salvador (BA), Brazil. E-mails: spreafico.ricardo@gmail.com, johildo.barbosa@gmail.com, amarcosvm@gmail.com, fdsjunior@gmail.com

Universidade Federal da Bahia - Salvador (BA), Brazil.

https://orcid.org/0000-0002-2277-1522

Antônio Marcos Vitória de Moraes

Companhia Baiana de Pesquisa Mineral - Salvador (BA), Brazil. E-mails: spreafico.ricardo@gmail.com, johildo.barbosa@gmail.com, amarcosvm@gmail.com, fdsjunior@gmail.com

https://orcid.org/0000-0001-5107-1552

Francisco Dias de Souza Júnior

Companhia Baiana de Pesquisa Mineral - Salvador (BA), Brazil. E-mails: spreafico.ricardo@gmail.com, johildo.barbosa@gmail.com, amarcosvm@gmail.com, fdsjunior@gmail.com

https://orcid.org/0000-0001-9468-8659

*Corresponding author.

R.S. performed geological mapping and collected, processed and interpreted the data, prepared the manuscript, including all figures and tables, and made the corrections suggested by reviewers; J.B. provided supervision and contributed in the field trips and improved the regional and petrological studies; A.M. provided contributions in the field trips and petrographic analyses; F.J. contributed in the geological mapping and collect of samples.

Competing interests: The authors declare no competing interests.

Geological/tectonic unit	Lithotype	Age	Method	Mineral dated	Author
Saúde Complex	Biotite schist	2068 ± 12 Ma*	U-Pb (LA-MC-ICP-MS)	Detrital zircon	*Zincone et al. (2017*Zincone S.A., Barbuena D., Oliveira E.P., Baldim M.R. 2017. Detrital zircon U-Pb ages as evidence for deposition of the Saúde Complex in a Paleoproterozoic foreland basin, northern São Francisco Craton, Brazil. Journal of South American Earth Sciences, 79:537-548. https://doi.org/10.1016/j.jsames.2017.09.009 https://doi.org/https://doi.org/10.1016/... )
Cachoeira Grande granite	Leucogranite	2080 ± 18 Ma	U-Pb (Electron microprobe)	Monazite (crystallization age)	Leite (2002Leite C.M.M. 2002. A Evolução Geodinâmica da Orogênese Paleoproterozóica nas Regiões de Capim Grosso, Jacobina e Pintadas - Mundo Novo (Bahia-Brasil): Metamorfismo, Anatexia Crustal e Tectônica. PhD Thesis, Universidade Federal da Bahia, Salvador, 408 p.)
Upper sequence (MNGB)	Quartzite	2133 ± 14 Ma*	U-Pb (LA-ICP-MS)	Detrital zircon	*Barbuena et al. (2016*Barbuena D., Oliveira E.P., Zincone S.A. 2016. Estudos de proveniência dos quartzitos do Greenstone Belt Mundo Novo (BA) e implicações tectono-estratigráficas. In: Congresso Brasileiro de Geologia, 48., 2016, Porto Alegre. Anais…, p. 818. Available at: <Available at: http://cbg2017anais.siteoficial.ws/anais48cbgcompleto.pdf >. Accessed on: Aug. 2018. http://cbg2017anais.siteoficial.ws/anais... )
Mundo Novo greenstone belt	Metadacite	2595 ± 21 Ma	U-Pb (LA-ICP-MS)	Zircon (crystallization age)	The present work
Itabuna-Salvador-Curaçá Belt	Tonalitic granulite	2574 ± 6 Ma	U-Pb (SHRIMP)	Zircon (crystallization age)	*Oliveira et al. (2010*Oliveira E.P., McNaughton N.J., Armstrong R. 2010. Mesoarchaean to Paleoproterozoic growth of the northern segment of the Itabuna-Salvador-Curaçá orogeny, São Francisco Cráton, Brazil. In: Kusky T.M., Zhai M.G., Xiao W. (Eds.). The evolving continents: understanding processes of continental growth. Geological Society of London Special Publication, 338(1):263-286. https://doi.org/10.1144/SP338.13 https://doi.org/https://doi.org/10.1144/... )
Itabuna-Salvador-Curaçá Belt	Enderbite	2695 ± 12 Ma	U-Pb (SHRIMP)	Zircon (crystallization age)	*Silva et al. (1997*Silva L.C., McNaughton N.J., Melo R.C., Fletcher I.R. 1997. U-Pb SHRIMP ages in the Itabuna-Caraíba TTG high-grade complex: the first window beyond the Paleoproterozoic overprinting of the eastern Jequié Craton, NE Brazil. In: Isgam International Symposium on Granites and Associated Mineralization, 1., 1997, Salvador. Abstracts…, p. 282-283. Available at: <Available at: https://www.researchgate.net/publication/284106273 >. Accessed on: Oct. 2017. https://www.researchgate.net/publication... )
Jequié Block	Granulites	2715 ± 29 Ma	U-Pb (SHRIMP)	Zircon (crystallization age)	*Silva et al. (2002*Silva L.C., Armstrong R., Delgado I.M., Pimentel M., Arcanjo J.B., Melo R.C., Teixeira L.R., Jost H., Cardoso Filho J.M., Pereira L.H.M. 2002. Reavaliação da evolução geológica em terrenos Pré-Cambrianos brasileiros com base em novos dados U-Pb SHRIMP, Parte I: Limite centro-oriental do Cráton São Francisco na Bahia. Revista Brasileira de Geociências, 32(4):501-512. https://doi.org/10.25249/0375-7536.2002324501512 https://doi.org/https://doi.org/10.25249... )
Jequié Block	Charnockite	2900 ± 24 Ma	Rb-Sr	Whole-rock (crystallization age)	Wilson (1987Wilson N. 1987. Combined Sm-Nd, Pb-Pb and Rb-Sr geochronology and isotope geochemistry in polymetamorphic Precambrian terrains: examples from Bahia, Brazil and Channel Island. MS Dissertation, U.K. Master, Oxford University, England, 150 p.)
Serrinha Block	Granitoid	2989 ± 11 Ma 3072 ± 2 Ma 3162 ± 26 Ma	U-Pb (SHRIMP)	Zircon (crystallization age)	*Rios et al. (2009*Rios D.C., Davis D.W., Conceição H., Davis W.J., Rosa M.L.S., Dickin A.P. 2009. Geologic evolution of the Serrinha nucleus granite-greenstone terrane (NE Bahia, Brazil) constrained by U-Pb single zircon geochronology. Precambrian Research, 170(3-4):175-201. https://doi.org/10.1016/j.precamres.2008.10.001 https://doi.org/https://doi.org/10.1016/... )
Serrinha Block	Gneiss, migmatite	3152 ± 5 Ma	U-Pb (SHRIMP)	Zircon (crystallization age)	*Oliveira et al. (2002aOliveira E.P., Mello E.F., McNaughton N. 2002a. Reconnaissance U-Pb geochronology of Precambrian quartzites from the Caldeirão belt and their basement, NE São Francisco Craton, Bahia, Brazil: implications for the early evolution of the Paleoproterozoic Itabuna-Salvador-Curaçá orogeny. Journal of South American Earth Sciences, 15(3):349-362. https://doi.org/10.1016/S0895-9811(02)00039-1 https://doi.org/https://doi.org/10.1016/... , 2002b*Oliveira E.P., Mello E.F., McNaughton N.J., Choudhuri A. 2002b. SHRIMP U-Pb age of the basement to the Rio Itapicuru Greenstone Belt, NE São Francisco craton. In: Congresso Brasileiro de Geologia, 41., 2002, João Pessoa. Anais…, p. 522.)
Jacobina Group	Quartzite	3500 - 3220 Ma	U-Pb (LA-MC-ICP-MS)	Detrital zircon	*Magee et al. (2001Magee C.W., Palin J.M., Taylor W.R. 2001. Laser ICP-MS U/Pb analyses of detrital zircons from Proterozoic sediments in Bahia state, Brazil; implications for the evolution of the São Francisco craton prior to 3.3 Ga. In: V.M. Goldschmidt Conference, 11., 2001, Hot Springs. Abstracts…, p. 3501. Available at: <Available at: https://www.lpi.usra.edu/meetings/gold2001/pdf/3501.pdf >. Accessed on: Nov. 2017. https://www.lpi.usra.edu/meetings/gold20... ); Teles (2013Teles G.S. 2013. Proveniência e idades de deposição dos sedimentos auríferos da Bacia de Jacobina: Implicações sobre a evolução da bacia durante o Paleo-Arqueano e a gênese da mineralização. MS Dissertation, Instituto de Geociências, Universidade de Brasília, Brasília, 122 p. Available at: <Available at: http://repositorio.unb.br/handle/10482/14972 >. Accessed on: July 2018. http://repositorio.unb.br/handle/10482/1... ); Teles et al. (2015Teles G.S., Chemale Jr. F., Oliveira C.G. 2015. Paleoarchean record of the detrital pyrite-bearing, Jacobina Au-U deposits, Bahia, Brazil. Precambrian Research, 256:289-313. https://doi.org/10.1016/j.precamres.2014.11.004 https://doi.org/https://doi.org/10.1016/... ); Barbuena et al. (2016*Barbuena D., Oliveira E.P., Zincone S.A. 2016. Estudos de proveniência dos quartzitos do Greenstone Belt Mundo Novo (BA) e implicações tectono-estratigráficas. In: Congresso Brasileiro de Geologia, 48., 2016, Porto Alegre. Anais…, p. 818. Available at: <Available at: http://cbg2017anais.siteoficial.ws/anais48cbgcompleto.pdf >. Accessed on: Aug. 2018. http://cbg2017anais.siteoficial.ws/anais... )
Mairi Block	Orthogneiss	3.33 - 3.30 Ga	U-Pb (LA-SF-ICP-MS)	Zircon (crystallization age)	*Sousa et al. (2018*Sousa D.F.M., Oliveira E.P., Amaral W.S. 2018. Geologia e geocronologia U-Pb em zircão de ortognaisses e K-granitoides relacionados ao Bloco Gavião (Complexo Mairi) e Cinturão Salvador-Curaçá - Região da Mina Caraíba - Bahia. In: Congresso Brasileiro de Geologia, 49., 2018, Rio de Janeiro. Anais..., p. 980. Available at: <Available at: http://cbg2018anais.siteoficial.ws/resumos/8534.pdf >. Accessed on: Aug. 2018. http://cbg2018anais.siteoficial.ws/resum... )
Gavião Block	Metagranite	3291 ± 2.5 Ma	U-Pb (LA-ICP-MS)	Zircon (crystallization age)	*Zincone et al. (2016*Zincone S.A., Oliveira E.P., Laurent O., Zhang H., Zhai M. 2016. 3.3 Ga High-Silica Intraplate Volcanic-Plutonic System of the Gavião Block, São Francisco Craton, Brazil: Implications of an intracontinental rift following the creation of insulating continental crust. Lithos, 266-267:414-434. https://doi.org/10.1016/j.lithos.2016.10.011 https://doi.org/https://doi.org/10.1016/... )
	Metarhyolite	3303 ± 11 Ma 3305 ± 9 Ma	U-Pb (LA-ICP-MS and SHRIMP)	Zircon (crystallization age)	*Zincone et al. (2016Zincone S.A., Oliveira E.P., Laurent O., Zhang H., Zhai M. 2016. 3.3 Ga High-Silica Intraplate Volcanic-Plutonic System of the Gavião Block, São Francisco Craton, Brazil: Implications of an intracontinental rift following the creation of insulating continental crust. Lithos, 266-267:414-434. https://doi.org/10.1016/j.lithos.2016.10.011 https://doi.org/https://doi.org/10.1016/... ); Peucat et al. (2002*Peucat J.J., Mascarenhas J.F., Barbosa J.S.F., Souza S.L., Marinho M.M., Fanning C.M., Leite C.M.M. 2002. 3,3 Ga SHRIMP U-Pb zircon age of a felsic metavolcanic rock from the Mundo Novo Greenstone Belt in the São Francisco Craton, Bahia (NE Brazil). Journal of South American Earth Sciences, 15(3):363-373. https://doi.org/10.1016/S0895-9811(02)00044-5 https://doi.org/https://doi.org/10.1016/... )
	TTG	3442 ± 2 Ma	U-Pb (ID-TIMS)	Zircon (crystallization age)	Mougeot (1996Mougeot R. 1996. Étude de la limite Archéen-Protérozoïque et des minéralisations Au ± U associées. Exemples de la région de Jacobina (Etat de Bahia, Brésil) et de Carajas (Etat de Para, Brésil). PhD Thesis, Université de Montpellier II, Montpellier, 306 p. Available at <Available at http://www.theses.fr/1996MON20131 >. Accessed on: Sept., 2018. http://www.theses.fr/1996MON20131... )

Geologic unit	Metakomatiite	Eastern metabasalt	Western metabasalt	Metadacite	Metarhyolite
Characteristics	Acicular and prismatic pseudomorphic grains and fine-grained groundmass	Equigranular and aphanitic with granonematoblastic microstructures	Inequigranular, aphanitic with schistosity planes	Fine-grained porphyroclastic microstructure	Fine-grained porphyroclastic microstructure
Minerals, vol.%
Quartz	-	5-7	3-5	27.5-31.8	20-25
Anorthite	-	15-20	-	-	-
Bytownite	-	10-15	-	-	-
Andesine		-	25-27.5	-	-
Oligoclase	-	5-10	25-27.5	-	-
Plagioclase	-	-	-	27.5-31.8	15-20
K-Feldspar	-	-	-	10-10.8	40-45
Biotite	-	-	5-7	10-10.8	10-15
Muscovite	-	-	-	10-10.8	-
Sericite	-	-	-	10-10.8	3-7
Fe-Hornblende + Mg-Hornblende	-	35-40	-	-	-
Fe-Tschermakite + Mg-Hornblenda	-	-	17-20	-	-
Actinolite	-	-	8-10	-	-
Anthophyllite + Tremolite	75-80	-	-	-	-
Edenite	-	5-7	-	-	-
Augite	-	5-6		-	-
Hypersthene	-	3-4	2-3	-	-
Talc + Clinochlore	20-25	-	-	-	-
Pyrite	-	-	Tr	-	-
Pyrrhotite	-	Tr	Tr	-	-
Chalcopyrite	-	Tr	Tr	-	-
Galena	-	-	Tr	-	-
Sphalerite	-	-	Tr	-	-
Arsenopyrite	-	-	Tr	-	-
Titanite	-	2-3	2.5-5	-	-
Ilmenite	-	2-3	2.5-5	Tr	Tr
Mn-Ilmenite	-	-	Tr	-	-
Zircon	-	-	-	Tr	Tr
Sum, vol.%	100	100	100	100	100

Geologic unit	Sample ID	Mineral	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	Sum
Eastern metabasalt	RR-072	Anorthite	46.60	0.08	35.37	0.29		0.01	18.41	1.17	0.03	101.96
Eastern metabasalt	RR-072	Anorthite	46.15		35.53	0.38		0.01	18.34	1.09	0.02	101.52
Eastern metabasalt	RR-018A	Bytownite	49.26	0.08	32.93	0.16	0.11	0.02	15.80	2.56	0.10	101.02
Eastern metabasalt	RR-011C	Oligoclase	62.40		22.79	0.09			3.50	9.20	0.08	98.06
Eastern metabasalt	RR-072	Fe-Hornblende	44.13	0.30	14.20	17.28	0.19	8.92	11.76	1.08	0.24	98.1
Eastern metabasalt	RR-011C	Mg-Hornblende	48.25	0.12	7.27	12.51	0.24	14.27	11.07	1.53	0.14	95.40
Eastern metabasalt	RR-018A	Edenite	51.46	0.18	0.62	14.97	0.41	9.19	22.71	0.16	0.01	99.71
Eastern metabasalt	RR-072	Hypersthene	53.07	0.19	0.55	25.94	0.60	15.04	0.93	0.06		96.38
Eastern metabasalt	RR-072	Hypersthene	52.59	0.04	1.00	26.40	0.56	15.07	1.40	0.08		97.14
Eastern metabasalt	RR-072	Hypersthene	52.77	0.18	0.40	26.53	0.74	15.14	0.86	0.07		96.69
Eastern metabasalt	RR-072	Titanite	16.79	42.49	1.06	25.39	0.66	0.70	14.00	0.03		101.12
Eastern metabasalt	RR-072	Ilmenite	0.10	50.58	0.03	45.84	0.79	0.07	0.02	0.03	0.01	97.47
Western metabasalt	RR-F6-001	Oligoclase	59.95	0.23	23.20	0.04			5.09	8.71	0.04	97.26
Western metabasalt	RR-F6-010	Andesine	56.79	0.03	26.89	0.14			9.04	6.45	0.05	99.39
Western metabasalt	RR-F1-001	Mg-Hornblende	46.43	0.67	8.44	18.06	0.42	10.09	11.7	0.90	0.38	97.09
Western metabasalt	RR-F1-001	Fe-Tschermakite	40.86	0.88	11.69	27.16	0.33	3.85	11.67	0.92	1.13	98.49
Western metabasalt	RR-F6-010	Fe-Tschermakite	41.31	0.89	11.28	26.92	0.37	3.91	11.58	1.03	1.06	98.35
Western metabasalt	RR-F6-001	Hypersthene	51.63	0.07	0.86	27.03	0.66	15.62	0.73	0.13		96.73
Western metabasalt	RR-F1-001	Biotite	33.06	2.45	15.68	28.96	0.33	4.86	0.04	0.16	9.46	95.00
Western metabasalt	RR-F1-001	Titanite	29.95	36.06	2.29	1.99	0.09	0.24	26.69	0.02	0.41	97.74
Western metabasalt	RR-F6-001	Ilmenite		54.86		46.66	2.32	0.06	0.07		0.01	103.98
Structural formula of the minerals:
Geologic unit	Sample ID	Mineral	Si	Ti	Al	Fe	Mn	Mg	Ca	Na	K	Sum
Eastern metabasalt	RR-072	Anorthite	2.106	0.003	1.884	0.011		0.001	0.891	0.103	0.002	5.001
Eastern metabasalt	RR-072	Anorthite	2.095		1.901	0.014		0.001	0.892	0.096	0.001	5.000
Eastern metabasalt	RR-018A	Bytownite	2.231	0.003	1.758	0.006	0.004	0.001	0.767	0.225	0.006	5.001
Eastern metabasalt	RR-011C	Oligoclase	2.810		1.210	0.003			0.169	0.803	0.005	5.000
Eastern metabasalt	RR-072	Fe-Hornblende	6.526	0.033	2.475	2.137	0.024	1.967	1.863	0.310	0.045	17.380*
Eastern metabasalt	RR-011C	Mg-Hornblende	7.164	0.013	1.272	1.553	0.030	3.159	1.761	0.440	0.027	17.420*
Eastern metabasalt	RR-018A	Edenite	7.619	0.020	0.108	1.854	0.051	2.028	3.603	0.046	0.002	17.331*
Eastern metabasalt	RR-072	Hypersthene	2.080	0.006	0.025	0.850	0.020	0.879	0.039	0.005		3.904
Eastern metabasalt	RR-072	Hypersthene	2.054	0.001	0.046	0.862	0.019	0.878	0.059	0.006		3.925
Eastern metabasalt	RR-072	Hypersthene	2.071	0.005	0.018	0.871	0.025	0.886	0.036	0.005		3.917
Eastern metabasalt	RR-072	Titanite	0.612	1.164	0.046	0.774	0.020	0.038	0.546	0.002		3.202
Eastern metabasalt	RR-072	Ilmenite	0.006	1.976	0.002	1.992	0.034	0.006	0.002	0.004		4.022
Western metabasalt	RR-F6-001	Oligoclase	2.728	0.008	1.244	0.002			0.248	0.768	0.002	5.000
Western metabasalt	RR-F6-010	Andesine	2.561	0.001	1.429	0.005			0.437	0.564	0.003	5.000
Western metabasalt	RR-F1-001	Mg-Hornblende	6.982	0.076	1.496	2.271	0.053	2.262	1.885	0.262	0.073	17.362*
Western metabasalt	RR-F1-001	Fe-Tschermakite	6.412	0.104	2.162	3.565	0.044	0.901	1.962	0.280	0.226	17.656*
Western metabasalt	RR-F6-010	Fe-Tschermakite	6.479	0.105	2.085	3.531	0.049	0.914	1.946	0.313	0.212	17.634*
Western metabasalt	RR-F6-001	Hypersthene	2.035	0.002	0.040	0.891	0.022	0.918	0.031	0.010		3.949
Western metabasalt	RR-F1-001	Biotite	2.684	0.150	1.500	1.966	0.023	0.588	0.003	0.025	0.980	9.919*
Western metabasalt	RR-F1-001	Titanite	1.004	0.909	0.090	0.056	0.003	0.012	0.958	0.001	0.018	3.051
Western metabasalt	RR-F6-001	Ilmenite		2.002		1.893	0.095	0.004	0.004			3.998

Spot name	U (ppm)	Th	Th/U	Pb_com	²⁰⁷ Pb/	1σ	²⁰⁷ Pb/	1σ	²⁰⁶ Pb/	1σ	²⁰⁷ Pb/ ²⁰⁶ Pb	1σ	%Conc.	Error cor.
Spot name	ppm	ppm			²⁰⁶ Pb		²³⁵ U		²³⁸ U		age (Ma)			Error cor.
1.1	658.4	275.8	0.419	1.25	2.6011	0.1320	0.1667	0.0049	5.9986	0.1771	1.851	0.063	53	0.98
2.1	616.1	277.4	0.450	2.53	3.2253	0.1528	0.1887	0.0056	5.2998	0.1561	2.014	0.061	55	0.92
3.1	101.7	43.7	0.430	0.42	10.4939	0.4770	0.4391	0.0133	2.2776	0.0692	2.590	0.050	90	0.78
4.1	728.8	408	0.560	1.90	1.5881	0.0810	0.1275	0.0038	7.8457	0.2310	1.433	0.077	53	0.96
5.1	452.6	253.4	0.560	4.34	6.1109	0.2648	0.2899	0.0081	3.4494	0.0968	2.378	0.052	69	0.99
6.1	599	298	0.498	0.09	2.3350	0.1107	0.1497	0.0044	6.6794	0.1945	1.850	0.064	48	0.98
7.1	385.1	164.7	0.428	0.37	4.3756	0.1945	0.2258	0.0064	4.4288	0.1246	2.234	0.057	58	0.99
8.1	415.9	198.2	0.477	0.08	2.2921	0.1151	0.1508	0.0045	6.6297	0.1965	1.803	0.067	50	0.97
9.1	372.7	152.8	0.410	0.05	4.2641	0.1927	0.2212	0.0064	4.5215	0.1312	2.225	0.056	57	0.97
10.1	283.1	113.6	0.401	0.04	7.3544	0.3155	0.3365	0.0094	2.9720	0.0830	2.440	0.052	76	0.90
11.1	388	156.1	0.402	0.78	4.5986	0.2045	0.2332	0.0066	4.2885	0.1216	2.264	0.055	59	0.98
12.1	450.1	205.3	0.456	0.55	2.3444	0.1156	0.1531	0.0045	6.5328	0.1934	1.817	0.066	50	0.98
13.1	406.3	160.6	0.395	0.06	3.4443	0.1674	0.1995	0.0061	5.0133	0.1540	2.032	0.062	57	0.49
14.1	193.1	73.7	0.382	0.21	8.2819	0.3658	0.3638	0.0109	2.7491	0.0827	2.509	0.055	79	0.35
15.1	329.7	128.6	0.390	0.18	6.6123	0.3050	0.3032	0.0094	3.2986	0.1025	2.436	0.055	70	0.99
16.1	300.9	113.2	0.376	0.31	8.5090	0.3625	0.3804	0.0109	2.6287	0.0750	2.479	0.055	83	0.98
17.1	351.1	182.4	0.520	0.13	5.6869	0.2459	0.2766	0.0082	3.6159	0.1069	2.336	0.058	67	0.87
18.1	327.6	171.5	0.524	0.49	4.0965	0.1937	0.2147	0.0068	4.6585	0.1467	2.207	0.064	56	0.88
19.1	435.1	203.3	0.467	0.37	2.9071	0.1374	0.1726	0.0054	5.7929	0.1824	1.988	0.063	51	0.97
20.1	618.3	339.5	0.549	0.04	1.6806	0.0784	0.1288	0.0039	7.7629	0.2344	1.520	0.070	51	0.97
21.1	242.3	75	0.310	0.51	7.0616	0.3039	0.3297	0.0095	3.0326	0.0878	2.405	0.056	76	0.88
22.1	480.2	204.1	0.425	0.54	2.5025	0.1152	0.1625	0.0049	6.1542	0.1866	1.827	0.066	53	0.87
23.1	585.9	291.2	0.497	0.38	1.6196	0.0764	0.1275	0.0038	7.8418	0.2358	1.470	0.072	52	0.97
24.1	452.8	467	1.031	0.28	4.5256	0.2037	0.2310	0.0069	4.3296	0.1303	2.253	0.058	59	0.99

Unit and classification	Sample ID	W. Long.	S. Lat.	SiO₂	TiO₂	Al₂O₃	Fe₂O₃t	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	LOI	Sum
Mundo Novo greenstone belt
Metakomatiite	RR-011B	40°25'02.20”	11°48'39.22”	47.01	0.25	7.33	10.18	0.22	24.46	2.99	0.08	0.03	0.005	5.49	98.05
Metakomatiite	FD-37-017	40°30'22.03”	11°41'07.33”	54.39	0.23	7.12	6.68	0.65	17.57	10.15	0.65	0.3	0.19	3.73	101.66
Metakomatiite	FD-058A	40°28'45.53”	11°41'43.47”	57.22	0.07	2.19	6.12	0.11	24.38	2.42	0.05	0.03	0.005	4.52	97.12
Metakomatiite	FD-070	40°28'36.03”	11°41'39.19”	55.02	0.07	2.81	9.38	0.23	18.91	7.4	0.11	0.03	0.005	4.03	98.00
Eastern metabasalt	RR-006	40°25'40.85”	11°53'04.26”	49.78	0.83	14.05	11.97	0.21	8.1	12.53	0.96	0.25	0.04	0.55	99.27
Eastern metabasalt	RR-011C	40°25'02.20”	11°48'39.22”	49.08	1.19	13.39	14.03	0.24	6.98	10.67	0.8	0.32	0.05	0.8	97.55
Eastern metabasalt	RR-014B	40°30'21.91”	11°41'40.20”	50.49	1	13.71	13.42	0.22	6.33	10.69	2.2	0.26	0.06	1.22	99.60
Eastern metabasalt	RR-018A	40°30'07.88”	12°13'43.29”	48.93	1.04	14.18	14.11	0.23	7.16	11.39	2.1	0.26	0.07	0.52	99.99
Eastern metabasalt	RR-018B	40°30'07.94”	12°13'43.35”	51.33	1.07	13.74	14.04	0.24	7.26	10.41	2.55	0.26	0.08	0.53	101.51
Eastern metabasalt	RR-018C	40°30'08.01”	12°13'43.42”	52.48	1.1	14.19	13.39	0.21	5.68	11.57	1.95	0.18	0.1	0.43	101.28
Eastern metabasalt	RR-018D	40°30'08.08”	12°13'43.48”	51.83	1.06	14.16	13.4	0.21	5.47	13.27	1.39	0.15	0.09	0.48	101.51
Eastern metabasalt	RR-071	40°28'39.28”	11°36'42.51”	54.77	1.46	13.32	15.76	0.26	6.36	10.05	0.65	0.23	0.03	0.85	103.74
Eastern metabasalt	RR-072	40°29'25.44”	11°37'14.46”	54.68	1.52	13.45	15.19	0.22	6.72	9.73	0.41	0.13	0.05	0.67	102.77
Eastern metabasalt	RR-078	40°28'06.14”	11°39'32.83”	52.46	1.15	13.76	13.35	0.21	6.49	10.56	1.68	0.19	0.04	0.63	100.52
Eastern metabasalt	RR-080	40°26'38.53”	11°40'09.08”	51.14	0.97	15.65	13.38	0.2	6.47	10.27	2.88	0.31	0.09	0.6	101.96
Eastern metabasalt	FD-37-001	40°30'22.03”	11°41'07.33”	50.14	0.97	14.33	12.6	0.22	6.47	10.84	1.98	0.09	0.08	0.9	98.62
Eastern metabasalt	FD-37-002	40°30'22.03”	11°41'07.33”	52.47	0.98	14.47	12.95	0.21	6.63	10.72	2.14	0.12	0.07	0.57	101.33
Eastern metabasalt	FD-37-004	40°30'22.03”	11°41'07.33”	51.5	1.11	14.03	14.35	0.23	5.49	9.95	2.08	0.16	0.09	0.36	99.35
Eastern metabasalt	FD-37-005	40°30'22.03”	11°41'07.33”	50.92	1.21	13.21	15.04	0.23	4.97	9.92	2.13	0.15	0.1	0.68	98.56
Eastern metabasalt	FD-37-006	40°30'22.03”	11°41'07.33”	50.81	0.71	15.59	11.17	0.18	7.74	11.18	2.22	0.15	0.06	0.89	100.70
Eastern metabasalt	FD-37-007	40°30'22.03”	11°41'07.33”	51.08	0.99	14.56	13.92	0.21	6.58	9.96	2.57	0.25	0.09	0.92	101.13
Eastern metabasalt	FD-37-009	40°30'22.03”	11°41'07.33”	52.74	0.93	14.95	13.57	0.21	7.53	10.68	2.38	0.18	0.08	0.61	103.86
Eastern metabasalt	FD-37-011	40°30'22.03”	11°41'07.33”	52.94	1.02	13.62	13.86	0.21	6.88	10.32	2.06	0.24	0.04	0.89	102.08
Eastern metabasalt	FD-37-012	40°30'22.03”	11°41'07.33”	53.63	1.23	14.07	15.43	0.25	5.07	10.01	2.36	0.16	0.12	0.88	103.21
Eastern metabasalt	FD-37-013	40°30'22.03”	11°41'07.33”	52.66	0.99	14.75	13.09	0.22	6.23	10.62	2.16	0.18	0.09	0.82	101.81
Eastern metabasalt	FD-37-015	40°30'22.03”	11°41'07.33”	48.91	1.12	15.58	14.27	0.24	6.58	11.58	2.33	0.21	0.1	0.93	101.85
Eastern metabasalt	FD-37-016	40°30'22.03”	11°41'07.33”	48.7	1.28	17.47	13.65	0.18	7.7	9.23	2.04	0.93	0.17	2.46	103.81
Eastern metabasalt	FD-37-019	40°30'22.03”	11°41'07.33”	53.15	0.99	14.19	13.06	0.22	6.16	10.68	2.39	0.13	0.1	0.77	101.84
Eastern metabasalt	FD-016	40°29'24.00”	11°42'01.07”	53.15	1.02	12.62	12.62	0.26	5.85	8.6	2.1	0.34	0.06	0.94	97.56
Eastern metabasalt	FD-028	40°26'43.09”	11°48'24.59”	52.18	1.27	13.24	12.86	0.21	5.74	12.44	1.58	0.24	0.07	0.78	100.61
Western metabasalt	RR-022	40°36'07.38”	12°18'51.47”	49.47	0.95	14.28	12.39	0.23	5.88	10.75	2.3	0.61	0.07	0.76	97.69
Western metabasalt	RR-F1-001	40°29'40.00”	11°53'22.35”	55.52	0.99	14.69	12.23	0.23	7.17	9.34	1.89	0.53	0.1	1.28	103.97
Western metabasalt	RR-F4-006	40°29'31.17”	11°54'14.89”	49.75	1.26	15.1	12.96	0.2	4.74	8.19	3.72	0.31	0.17	0.24	96.64
Western metabasalt	RR-F4-007	40°29'31.17”	11°54'14.89”	49.8	1.35	15.05	12.58	0.19	4.74	7.63	2.33	1.57	0.19	0.32	95.75
Western metabasalt	RR-F6-001	40°29'35.54”	11°53'35.26”	57.06	1.34	16.4	7.24	0.11	2.37	5.92	4.71	1.18	0.2	0.8	97.33
Western metabasalt	RR-F6-002	40°29'35.54”	11°53'35.26”	48.04	1.56	17.37	11.27	0.19	4.64	7.21	4.03	0.99	0.17	0.64	96.11
Western metabasalt	RR-F6-003	40°29'35.54”	11°53'35.26”	46.4	1.45	15.54	12.8	0.24	5.95	8.21	2.93	0.98	0.17	0.68	95.35
Western metabasalt	RR-F6-004	40°29'35.54”	11°53'35.26”	48.72	1.3	14.51	11.68	0.2	5.15	9.4	2.04	0.83	0.19	1.04	95.06
Western metabasalt	RR-F6-005	40°29'35.54”	11°53'35.26”	50.26	1.28	15.5	13.09	0.2	4.94	8.52	3.14	0.96	0.17	0.35	98.41
Western metabasalt	RR-F6-006	40°29'35.54”	11°53'35.26”	50.5	1.34	15.71	12.96	0.2	4.44	8.48	3.53	0.83	0.19	0.26	98.44
Western metabasalt	RR-F6-007	40°29'35.54”	11°53'35.26”	52.73	1.4	15.78	10.57	0.17	4.16	8.13	3.74	0.18	0.2	0.25	97.31
Western metabasalt	RR-F6-008	40°29'35.54”	11°53'35.26”	48.98	1.29	15.2	12.44	0.2	5.18	8.36	3.3	0.91	0.16	0.35	96.37
Western metabasalt	RR-F6-009	40°29'35.54”	11°53'35.26”	48.1	1.33	15.23	13.02	0.22	6.3	8.15	2.59	0.22	0.16	0.14	95.46
Western metabasalt	RR-F6-010	40°29'35.54”	11°53'35.26”	50.64	1.4	15.08	12.75	0.22	5.37	7.19	2.54	0.63	0.18	0.05	96.05
Western metabasalt	RR-F6-016	40°29'35.54”	11°53'35.26”	54.48	0.71	16.43	11.03	0.23	6.07	3.52	4.04	1.19	0.07	2.47	100.24
Western metabasalt	RR-F6-018	40°29'35.54”	11°53'35.26”	53.79	0.63	15.71	9.44	0.2	6.19	9.82	2.35	0.24	0.09	0.77	99.23
Western metabasalt	RR-F16-027	40°29'27.40”	11°53'33.16”	57.24	0.73	14.2	10.32	0.16	5.01	8.5	2.57	0.74	0.05	1.36	100.88
Metadacite	FD-052	40°29'26.72”	11°42'09.52”	70.98	0.34	14.22	5.08	0.07	2.09	1.24	2.02	2.46	0.04	1.55	100.09
Metarhyolite	RR-FST-002	40°29'33.55”	11°42'52.06”	73.2	0.41	11.49	6.58	0.08	1.63	1.81	1.41	2.69	0.08	0.74	100.12

Unit and classification	Sample ID	Cs	Ba	Th	U	Ta	Nb	Zr	Hf	Ti	Y	Sr	Rb	Ni	V
Mundo Novo greenstone belt
Metakomatiite	RR-011B	0.37	5	1.2	0.35	0.025	2.45	13	0.53	1500	4.47	12	1.2	945	2.5
Metakomatiite	FD-37-017	0.51	176	2.8	1.38	0.3	1.69	43	1.31	1380	8.83	49	10.3	644	42
Metakomatiite	FD-058A	0.06	42	2.6	0.72	0.36	1.27	20	0.63	420	10.47	5	1.6	587	2.5
Metakomatiite	FD-070	0.11	50	0.8	0.39	0.025	0.58	15	0.2	420	12.02	5	1	493	2.5
Eastern metabasalt	RR-006	0.76	104	0.5	0.16	0.025	3.3	40	1.27	4980	18.07	90	8.1	115	207
Eastern metabasalt	RR-011C	1.52	134	2.3	0.66	0.17	7.32	93	2.48	7140	21.67	100	8.1	110	232
Eastern metabasalt	RR-014B	0.13	122	0.8	0.13	0.025	2.66	69	1.96	6000	28.43	108	6.1	112	283
Eastern metabasalt	RR-018A	0.3	110	1.8	0.31	0.025	5.3	77	2.15	6240	26.24	109	4	112	295
Eastern metabasalt	RR-018B	0.21	80	1	0.27	0.025	3.59	67	1.87	6420	24.46	120	5.8	110	306
Eastern metabasalt	RR-018C	0.17	132	1.8	0.42	0.025	9.69	75	1.99	6600	27.2	128	2.1	112	306
Eastern metabasalt	RR-018D	0.16	119	2.7	0.42	0.34	7.56	72	2.07	6360	25.88	162	1.8	109	292
Eastern metabasalt	RR-071	0.77	73	2.3	0.31	0.025	5.52	84	2.52	8760	22.27	66	5.2	92	306
Eastern metabasalt	RR-072	0.36	30	1.1	0.29	0.025	4.77	88	2.71	9120	22.77	185	4	97	315
Eastern metabasalt	RR-078	0.25	242	0.8	0.29	0.025	3.08	69	2.23	6900	28.29	94	7.6	125	315
Eastern metabasalt	RR-080	0.27	102	0.9	0.39	0.025	2.91	83	2	5820	24.88	133	11.7	124	386
Eastern metabasalt	FD-37-001	0.2	108	0.4	0.35	0.025	2.26	78	1.97	5820	22.32	109	2.6	90	366
Eastern metabasalt	FD-37-002	0.17	46	0.1	0.22	0.025	1.93	69	1.99	5880	22.86	110	2.8	108	371
Eastern metabasalt	FD-37-004	0.09	40	0.4	0.23	0.025	2.46	85	2.28	6660	27.81	107	2.3	72	423
Eastern metabasalt	FD-37-005	0.07	34	0.4	0.26	0.025	2.75	91	2.36	7260	29.87	127	1.6	62	425
Eastern metabasalt	FD-37-006	0.41	53	0.05	0.18	0.025	1	48	1.37	4260	16.4	107	4.9	152	298
Eastern metabasalt	FD-37-007	0.42	232	0.3	0.24	0.025	1.99	79	1.91	5940	23.31	122	6.6	142	362
Eastern metabasalt	FD-37-009	0.24	185	0.2	0.24	0.025	1.84	73	1.87	5580	22.88	117	3.3	164	374
Eastern metabasalt	FD-37-011	0.29	127	0.5	0.27	0.025	4.03	56	1.69	6120	22.3	111	4.7	148	299
Eastern metabasalt	FD-37-012	0.12	40	0.4	0.27	0.025	3.5	96	2.41	7380	28.27	109	2	49	490
Eastern metabasalt	FD-37-013	0.41	54	0.05	0.21	0.025	2.23	73	1.93	5940	22.35	113	4.6	106	379
Eastern metabasalt	FD-37-015	0.51	116	0.2	0.27	0.025	2.62	87	2.15	6720	26.05	120	5.5	116	415
Eastern metabasalt	FD-37-016	1.29	768	5	0.47	1.61	4.5	96	3.96	7680	28.83	107	32.9	110	451
Eastern metabasalt	FD-37-019	0.09	35	0.7	0.27	0.025	2.52	77	2.16	5940	23.28	112	1.5	77	409
Eastern metabasalt	FD-016	0.32	161	1.5	0.36	0.14	2.64	78	2.09	6120	24.9	111	8.2	104	323
Eastern metabasalt	FD-028	0.92	56	0.7	0.21	0.17	2.92	75	1.91	7620	25.05	132	8.9	111	322
Western metabasalt	RR-022	0.31	78	1.9	0.46	0.32	5.25	87	2.36	5700	28.44	574	13.7	83	192
Western metabasalt	RR-F1-001	1.2	141	4.2	0.95	0.025	6.22	138	3.44	5940	25.4	127	16.3	148	257
Western metabasalt	RR-F4-006	0.12	72	3.4	1.06	0.15	7.06	169	4.5	7560	32.18	187	4.5	88	331
Western metabasalt	RR-F4-007	0.63	480	3.3	1.08	0.08	7.8	171	4.31	8100	35.3	180	46.2	89	338
Western metabasalt	RR-F6-001	1.6	216	4.4	1.39	0.26	9.05	177	4.94	8040	32.77	131	43.7	106	358
Western metabasalt	RR-F6-002	1.9	188	4.3	1.3	0.24	8.7	192	5.27	9360	40.14	108	29.5	91	312
Western metabasalt	RR-F6-003	1.11	244	3.6	1.16	0.025	8.05	183	4.73	8700	36.53	127	19.8	97	366
Western metabasalt	RR-F6-004	1.31	184	3.3	1.09	0.025	7.05	161	4.52	7800	33.53	80	20.9	93	310
Western metabasalt	RR-F6-005	2.57	278	3.3	1.09	0.025	7.1	171	4.45	7680	34.07	205	19.2	92	316

Brasil

Brasil

Geology, petrology and U-Pb geochronology of metavolcanic rocks in the Mundo Novo greenstone belt, eastern São Francisco Craton, NE Brazil: considerations about its tectonic setting

Abstract