Petrografia, geoquímica e isótopos Sm-Nd de granitos do leste do Domínio Tapajós, estado do Pará

Semblano, Flávio Robson Dias; Macambira, Moacir José Buenano; Vasquez, Marcelo Lacerda

doi:10.1590/2317-4889201620160059

Flávio Robson Dias Semblano ^**Corresponding author

Programa de Pós-graduação em Geologia e Geoquímica, Instituto de Geociências, Universidade Federal do Pará - UFPA, Belém (PA), Brasil. E-mail: frdsemblano@yahoo.com.br

Moacir José Buenano Macambira

Laboratório de Geologia Isotópica, Universidade Federal do Pará - UFPA, Belém (PA), Brasil. E-mail: moamac@ufpa.br

Marcelo Lacerda Vasquez

Serviço Geológico do Brasil, Companhia de Pesquisa de Recursos Minerais - CPRM, Superintendência Regional de Belém - SUREG-Belém, Belém (PA), Brasil. E-mail: marcelo.vasquez@cprm.gov.br

*Corresponding author

Figuras (9)
Tabelas (5)

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Figure 1:
Provinces and tectonic domains of state of Pará (Vasquez et al. 2008aVasquez M.L., Rosa-Costa L.T., Silva C.M.G., Klein E.L. 2008a. Compartimentação Tectônica. : Vasquez M.L., Rosa-Costa. L.T. (Orgs.). Geologia e recursos minerais do estado do Pará: Sistema de Informações Geográficas - SIG:texto explicativo dos mapas geológico e tectônico e de recursos minerais do estado do Pará. Escala 1:1.000.000. Belém, CPRM., modified from Santos 2003Santos J.O.S. 2003. Geotectônica dos escudos das Guianas e Brasil-Central. : Bizzi L.A., Schobbenhaus C., Vidotti R.M., Gonçalves J.H. (Eds.). Geologia, tectônica e recursos minerais do Brasil . CPRM, Brasília. p. 169-226.).

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Figure 2:
Geological map of the study area with rocks samples of the study granites (modified from Vasquez et al. 2014aVasquez M.L., Chaves C.L., Moura E.M., Oliveira J.H.M. 2014a. Carta Geológica da Folha SB.21-Z-A-III - Jardim do Ouro. Escala 1:100.000. CPRM.; 2014bVasquez M.L., Chaves C.L., Moura E.M., Oliveira J.H.M. 2014b. Carta Geológica da Folha SB.21-Z-A-II - São Domingos . Escala 1:100.000. CPRM.).

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Figure 3:
Q-A-P and Q-(A+P)-M diagrams (Streckeisen 1976Streckeisen A.L. 1976. To each plutonic rock its proper name. Earth-Science Reviews 12(1):1-33. doi: 10.1016/0012-8252(76)90052-0.
https://doi.org/10.1016/0012-8252(76)900... ) showing the mineralogical modal composition of Mamoal, Dalpaiz, Serra Alta and Igarapé Salustiano plutons. Lines 1, 2 and 3, respectively, represent the trends of tonalitic-trondhjemitic calc-alkaline, granodioritic calc-alkaline and shoshonitic series. The grey field represents the granitoids formed by crustal melting (Lameyre and Bowden 1982Lameyre J., Bowden P. 1982. Plutonic rock types series: discrimination of various granitoid series and related rocks. Journal of Volcanology Geothermal Research 14(1-2):169-186. doi: 10.1016/0377-0273(82)90047-6.
https://doi.org/10.1016/0377-0273(82)900... ).

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Figure 4:
Textural aspects photomicrographs of the studied rocks. (A) porphyritic texture in BAMzG facies rock of the Mamoal granite; (B) well developed pertitas in BFAG facies of the Mamoal granite; (C) allanite crystal associated with opaque minerals and amphibole, which presents break-up to biotite in BAMzG facies of the Mamoal granite; (D) bight in quartz crystals with their edges intergrown in alkali feldspar of the BAMzG facies of the Dalpaiz granite; (E) alkali feldspar crystal showing radial fringe type granofiric intergrowth with quartz in BSG facies of the Dalpaiz granite; (F) allanite crystals associated to epidote in ASG facies of the Serra Alta granite; (G) opaque mineral replacing amphibole crystals in ASG facies of the Serra Alta granite; (H) representative isotropic textural aspect of the Igarapé Salustiano granite. Images are under cross-polarized light.

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Figure 5:
Geochemical diagrams for study rocks from the MIS and PIS, including fields related to MIS from Lamarão et al. (2002Lamarão C.N., Dall'Agnol R., Lafon J.M., Lima E.F. 2002. Geology, geochemistry, and Pb-Pb zircon geochronology of the Paleoproterozoic magmatism of Vila Riozinho, Tapajós Gold Province, Amazonian craton, Brazil. Precambrian Research 119(1-4):189-223. doi: 10.1016/S0301-9268(02)00123-7.
https://doi.org/10.1016/S0301-9268(02)00... ): (A) K₂O vs . SiO₂; (B) Fe-index [FeO_t/(FeO_t+MgO)] vs . SiO₂ from Frost et al. (2001Frost B.R., Barnes C.G., Collins W.J., Arculus R.J., Ellis D.J., Frost C.D. 2001. A geochemical classification for granitic rocks. Journal of Petrology , 42(11):2033-2048. doi: 10.1093/petrology/42.11.2033.
https://doi.org/10.1093/petrology/42.11.... ) (FeO_t calculated as FeO); (C) MALI (Na₂O+K₂O-CaO) vs . SiO₂; (D) A/NK (Al₂O₃/Na₂O+K₂O) vs . A/CNK (Al₂O₃/CaO+Na₂O+K₂O) molar from Shand (1951Shand S.J. 1951. Eruptive rocks: their genesis, composition, classification and their relation to ore-deposit with a chapter on meteorites . 4. ed. New York, Wiley, 488p.); (E) Rb vs . Y + Nb, fields from Pearce (1996Pearce J. 1996. Sources and settings of granitic rocks. Episodes 19(4):120-125.): Syn-COLG - syn-collsional granites, WPG - within-plate granites, post-COLG - post-collisional granites, VAG - volcanic arc granites, ORG - ocean ridge granites; (F) (K₂O+Na₂O)/CaO vs . (Zr + Nb + Ce + Y) diagram, average composition of A-type (A), M-type (M), S-type (S), I-type (I) granites and the fields for fractionated felsic granites (FG) and unfractionated M-, I- and S-type granites (OGT) according to Whallen et al. (1987Whalen J.B., Currie K.L., Chappell B.W. 1987. A-type granites: geochemical characteristics, discrimination and petrogenesis. Contributions to Mineralogy and Petrology 95(4):407-419. doi: 10.1007/BF00402202.
https://doi.org/10.1007/BF00402202... ).

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Figure 6:
Normalized spidergram to primordial mantle (Wood 1979Wood D.A. 1979. A variably veined suboceanic upper mantle - genetic significance for mid-ocean ridge basalts from geochemical evidence. Geology 7(10):499-503. doi: 10.1130/0091-7613(1979)7.
https://doi.org/10.1130/0091-7613(1979)7... ) for the MIS rocks: (A) Dalpaiz granite; (B) Igarapé Tabuleiro granite; (C) Mamoal granite; (D) Serra Alta granite, PIS; (E) Igarapé Salustiano granite; (F) MIS related units: Maloquinha granite and Moraes Almeida Formation from Lamarão et al. (2002Lamarão C.N., Dall'Agnol R., Lafon J.M., Lima E.F. 2002. Geology, geochemistry, and Pb-Pb zircon geochronology of the Paleoproterozoic magmatism of Vila Riozinho, Tapajós Gold Province, Amazonian craton, Brazil. Precambrian Research 119(1-4):189-223. doi: 10.1016/S0301-9268(02)00123-7.
https://doi.org/10.1016/S0301-9268(02)00... ).

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Figure 7:
Normalized REE diagram to chondrite (Eversen et al. 1978Evensen N.M., Hamilton P.J., O'Nions R.K. 1978. Rare-earth abundances in chondritic meteorites. Geochimica et Cosmochimica Acta 42:1199-1212.) for the MIS samples: Dalpaiz granite (A), Igarapé Tabuleiro granite (B), Mamoal granite (C), Serra Alta granite (D), and PIS: Igarapé Salustiano granite (E), and the MIS related units: Maloquinha granite and Moraes Almeida Formation (F) from Lamarão et al. (2002Lamarão C.N., Dall'Agnol R., Lafon J.M., Lima E.F. 2002. Geology, geochemistry, and Pb-Pb zircon geochronology of the Paleoproterozoic magmatism of Vila Riozinho, Tapajós Gold Province, Amazonian craton, Brazil. Precambrian Research 119(1-4):189-223. doi: 10.1016/S0301-9268(02)00123-7.
https://doi.org/10.1016/S0301-9268(02)00... ).

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Figure 8:
ε_Nd vs . time (T) showing Nd isotopic composition of the studied plutonic rocks. CHUR is undifferentiated Earth (DePaolo & Wasserburger 1976DePaolo D.J., Wasserburger G.J. 1976. Nd isotopic variations and petrogenetic models. Geophysical Research Letters 3(5):249-252. doi: 10.1029/GL003i005p00249.
https://doi.org/10.1029/GL003i005p00249... ) and DM depleted mantle (DePaolo 1981).

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Figure 9:
Nb-Y-Ce and Nb-Y-Ga*3 discriminant diagrams for A1- and A2-type granitoids (Eby 1992Eby G.N. 1992. Chemical subdivision of the A-type granitoids: petrogenetic and tectonic implications. Geology 20(7): 641-644. doi: 10.1130/0091-7613(1992)020.
https://doi.org/10.1130/0091-7613(1992)0... ) for the MIS rocks. Symbols as .

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Table 1:
Geochronological and isotopic data for paleoproterozoic A-type granites and related volcanic rocks, and PIS rocks from Tapajós and Iriri-Xingu domains, Amazonian Craton.

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Table 2:
Mineralogical contents of Mamoal, Dalpaiz, Igarapé Tabuleiro, Serra Alta and Igarapé Salustiano plutons.

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Table 3:
Major (wt.%) and trace (ppm) elements data for Maloquinha Intrusive Suite (MIS) and Parauari Intrusive Suite (PIS) granitoids.

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Table 3:
Continuation.

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Table 4:
Sm-Nd whole rock isotopic data for the studied plutonic rocks.

Geologic unit	Suite	Rock type	Age (Ma)	Method	Ref.	ε_Nd(t)	T_DM (Ga)	Ref.
Iriri-Xingu Domain (Central Amazonian Province)
Rio Dourado	RDIS	Syenogranite	1884±4	U-Pb zr	Ref.	ε_Nd(t)	T_DM (Ga)	Ref.	10
Rio Dourado	RDIS	Granite	1876±39	U-Pb zr	11	-10.7 to -3.10	2.84 to 2.61	11
Santa Rosa Formation	-	Ash tuff	1884±2	Pb-Pb zr	12	-11.39 to -5.80	3.12 to 2.56	12
Santa Rosa Formation	-	Rhyolite	1879±2	Pb-Pb zr	12	-11.39 to -5.80	3.12 to 2.56	12
A-type Undifferentiated Granite	-	quartz syenite	1889±2	Pb-Pb zr	13	-8.76	2.87	13
Tapajós Domain (Tapajós-Parima Province)
Iriri Group	MIS	Rhyolite	1888±2	Pb-Pb zr	13	-8.76	2.87	13	2
Maloquinha granite	MIS	Bt-hb granite	1882±4	Pb-Pb zr	4
Iriri Group	MIS	Rhyodacite	1888±2	Pb-Pb zr	4
Iriri Group	MIS	Rhyolite	1888±7	Pb-Pb zr	3
Maloquinha granite	MIS	Monzogranite	1877±12	U-Pb zr	7	-6.67 to -2.84	2.60 to 2.53	5
Maloquinha granite	MIS	Monzogranite	1874±7	U-Pb zr	7
Maloquinha granite	MIS	Monzogranite	1872±4	U-Pb zr	7
Maloquinha granite	MIS	Alaskite	1899±25	U-Pb zr	7
Iriri Group	MIS	-	1870±8	U-Pb zr	7	-1.37	2.45	5
Maloquinha granite	MIS	Bt monzogranite	1880±9	Pb-Pb zr	8	-2.45 to -0.72	2.28 to 2.23	9
Moraes Almeida Formation	MIS	Rhyolite	1890±6	Pb-Pb zr	8	-3.05 to -1.98	2.44 to 2.29	9
Moraes Almeida Formation	MIS	Trachyte	1881±4	Pb-Pb zr	8
Moraes Almeida Formation	MIS	Ignimbrite	1875±4	Pb-Pb zr	8
Mamoal granite	MIS	-	-	-	-	-5.01 to -0.89	2.60 to 2.20	14
Dalpaiz granite	MIS	-	-	-	-	-2.07 to -0.76	2.41 to 2.22	14
Serra Alta granite	MIS	-	-	-	-	-3.85 to -3.85	2.46	14
Parauari granite	PIS	Syenogranite	1883±4	U-Pb zr	7
Parauari granite	PIS	-	1883±8	Pb-Pb zr	1
Parauari granite	PIS	Granite	1883±2	Pb-Pb zr	6
Parauari granite	PIS	Monzogranite	1879±11	U-Pb zr	5
Jardim do Ouro granite	PIS	Hb-bt monzogranite	1880±3	Pb-Pb zr	8	-1.82	2.32	9
Younger São Jorge granite	PIS	Hb-bt monzogranite	1891±3	Pb-Pb zr	8	-5.21 and -3.42	2.43 and 2.32	9

References: 1) Brito et al. (1999Brito M.F.L., Almeida M.E., Macambira M.J.B. 1999. 207Pb/206Pb age of calk-alkaline Rapakivi granite in Tapajós Gold Province, Amazon Cráton - Brazil. : South-American symposium on isotope geology, 2., Córdoba, Argentina. 1999. Extended Abstracts ... Córdoba, Argentina: p.40-43.), 2) Dall'Agnol et al. (1999bDall'Agnol R., Silva C.M.G., Scheller T. 1999b. Fayalite-hedenbergite rhyolites of the Iriri Formation, Tapajós Gold Province, Amazonian Craton: implications for the Uatumã volcanism. : Simpósio sobre vulcanismo e ambientes associados, 1., Gramado-RS. Boletim de resumos... , Gramado, p.31. ), 3) Moura et al. (1999Moura C.A.V., Gorayeb P.S.S., Matsuda N.S. 1999. Geocronologia Pb-Pb em zircão do riolito Vila Raiol, Formação Iriri - sudoeste do Pará. : Simpósio de Geologia da Amazônia, 6., 1999, Manaus. Resumos expandidos ... Manaus: SBG, p.475-477.), 4) Vasquez et al. (1999Vasquez M.L., Klein E.L., Quadros M.L.E.S., Bahia R.B.C., Santos A., Ricci P.S.F., Sachett C.R., Silva C.M.G., Macambira M.J.B. 1999. Magmatismo Uatumã na Província Tapajós - novos dados geocronológicos. : Simpósio de Geologia da Amazônia, 6., Manaus. Resumos expandidos ... Manaus: SBG - Núcleo Norte. p.471-474. ), 5) Santos et al. (2000Santos J.O.S., Hartmann L.A., Gaudette H.E., Groves D.I., Mcnaughton N.J., Flecher I.R. 2000. A new understanding of the provinces of the Amazon Craton based on integration of field mapping and U-Pb and Sm-Nd Geochronology. Gondwana Research 3(4):453-488.), 6) Klein & Vasquez (2000Klein E.L., Vasquez M.L. (Orgs.). Geologia e recursos minerais da Folha Vila Riozinho - SB.21-Z-A: Estado do Pará. Escala 1:250.000. Brasília: CPRM, 2000. 1 CD-ROM. Programa Levantamentos Geológicos Básicos do Brasil (PLGB). Projeto Especial Província Mineral do Tapajós (Promin Tapajós).), 7) Santos et al. (2001Santos J.O.S., Groves D.I., Hartmann L.A., Moura M.A., Mcnaughton N.J. 2001. Gold deposits of the Tapajós and Alta Floresta Domains, Tapajós-Parima orogenic belt, Amazon Craton, Brazil. Mineralium Deposita 36(3):278-299. doi: 10.1007/s001260100172.
https://doi.org/10.1007/s001260100172... ), 8) Lamarão et al. (2002Lamarão C.N., Dall'Agnol R., Lafon J.M., Lima E.F. 2002. Geology, geochemistry, and Pb-Pb zircon geochronology of the Paleoproterozoic magmatism of Vila Riozinho, Tapajós Gold Province, Amazonian craton, Brazil. Precambrian Research 119(1-4):189-223. doi: 10.1016/S0301-9268(02)00123-7.
https://doi.org/10.1016/S0301-9268(02)00... ), 9) Lamarão et al. (2005Lamarão C.N., Dall'Agnol R., Pimentel M.M. 2005. Nd isotopic composition of Paleoproterozoic volcanic and granitoid rocks of Vila Riozinho: implications for the crustal evolution of the Tapajós gold province, Amazon Craton. Journal of South American Earth Sciences 18(3-4):277-292. doi: 10.1016/j.jsames.2004.11.005.
https://doi.org/10.1016/j.jsames.2004.11... ), 10) Barros et al. (2006Barros M.A.S., Padilha R.A., Rubert R.R., Pimentel M.M., Chemale Jr. F. 2006. Iriri volcanism and Rio Dourado Granite: A-Type Paleoproterozoic Magmatism in northeastern Mato Grosso - Brazil. : Symposium on magmatism, crustal evolution, and metallogenesis of the Amazonian Craton/workshop on A-Type granites and related rocks through time (IGCP 510), 2006, Belém. Abstract volume and Field Trips Guide ... Belém: PRONEX-UFPA/SBG-NO, p.39-39.), 11) Barros et al. (2011Barros M.A.S., Pimentel M.M., Silva F.R., Dantas E.L. 2011. A Suíte Intrusiva Rio Dourado - um granito tipo A de 1,88 Ga - sudeste do Cráton Amazônico - Mato Grosso - Brasil. Geologia USP Série Científica, 11(1):75-93. doi: 10.5327/Z1519-874X2011000100005.
https://doi.org/10.5327/Z1519-874X201100... ), 12) Fernandes et al. (2011Fernandes C.M.D., Juliani C., Monteiro L.V.S., Lagler B., Misas C.M.E. 2011. High-K calc-alkaline to A-type fissure-controlled volcano-plutonism of the São Félix do Xingu region, Amazonian craton, Brazil: Exclusively crustal sources or only mixed Nd model ages? Journal of South American Earth Sciences , 32(4):351-368. doi: 10.1016/j.jsames.2011.03.004.
https://doi.org/10.1016/j.jsames.2011.03... ), 13) Semblano et al. (2016Semblano F.R.D., Pereira N.C.S, Vasquez M.L, Macambira M.J.B. 2016. Novos dados geológicos e isotópicos para o Domínio Iriri-Xingu, Província Amazônia Central: implicações para a idade do Grupo Iriri.Geologia USPSérie Científica 16(3):19-38. Doi: 10.11606/issn.2316-9095.v16i3p19-38.
https://doi.org/10.11606/issn.2316-9095.... ), 14) this work. RDIS: Rio Dourado Intrusive Suite; MIS: Maloquinha Intrusive Suite; PIS: Parauari Intrusive Suite; Bt: biotite; Hb: hornblende; zr: zircon.

Pluton	Facies	Essential minerals (modal %)	Mafic minerals (modal %)	Varietal minerals (modal %)	Accessory minerals	Secondary minerals	Plagioclase
Mamoal	BAMzG	Qz (24-46) Pl (20-42) K-fsp (32-43)	0.1-7	Bt (<2.5) Hb (<2)	Ttn, Aln, Opq, Ap, Zr	Ser, Ep, Chl, Opq, Cm	Oligoclase/Andesine
	BASG	Qz (24-47) Pl (5-22) K-fsp (37-62)	0.5-6	Bt (0.5-5) Hb (<2)	Ap, Zr, Opq, Ttn	Ser, Ep, Chl, Ms, Bt, Cm	Oligoclase
	BAFG	Qz (39-28) Pl (<8) K-fsp (58-71)	<1	Bt (<2)	Ap, Zr, Opq	Ser, Ms, Ep, Cm	(Albite) Oligoclase
Dalpaiz	BAMzG	Qz (28-38) Pl (25-33) K-fsp (27-37)	2-11	Bt (4-7) Hb (<5)	Ttn, Opq, Ap, Zr	Ser, Ms, Chl, Bt, Opq, Cm	Oligoclase
Dalpaiz	BSG	Qz (31-36) Pl (16-21) K-fsp (41-52)	1-2	Bt (~2)	Ap, Aln, Opq, Zr, Ep	Ser, Chl, Opq, Cm	Oligoclase
Igarapé Tabuleiro^a	BLMzG/SG	Qz (24-47) Pl (8-24) K-fsp (35-56)	1-4	Bt (<3.5)	Ap, Aln, Opq, Zr	Ser, Chl, Ms, Opq, Ttn, Fl, Cb	Oligoclase/ Albite
	ABQM	Qz (19) Pl (39) K-fsp (42)	~6	Bt (2.2) Hb (1.1)	Ap, Zr, Opq	Ser, Chl, Ep, Ttn, Fl, Cm	-
	BQS	Qz (17) Pl (18) K-fsp (65)	~4	Bt (2.4)	Ap, Zr, Opq	Ser, Chl, Ttn, Fl, Cm	-
Serra Alta	ASG	Qz (23-42) Pl (10-17) K-fsp (47-66)	2.5-6	Bt (<1.8) Hb (1-2)	Opq, Ep, Zr, Ap, Aln	Ser, Ep, Opq, Cb, Cm	Oligoclase/ Andesine
	BQzS	Qz (18-19) Pl (9-11) K-fsp (69-72)	5-7	Bt (2-4) Hb (<2)	Ep, Ap, Zr	Ep, Ser, Ms, Opq, Cm	Oligoclase
	AFG	Qz (21-24) Pl (5-6) K-fsp (71-73)	2-5	Bt (1-1.5) Hb (<2.5)	Ap, Ep, Ms	Ser, Opq, Cm	Albite/ Oligoclase
Igarapé Salustiano	BAMzG	Qz (16-31) Pl (41-44) K-fsp (29-42)	6-7	Bt (5-6) Hb (<1)	Ttn, Opq, Ap, Zr	Ser, Chl, Cm	Oligoclase/ Andesine

Unit rock	Maloquinha Intrusive Suite
Pluton name	Dalpiz granite						Mamoal granite
Facies/Lithotype	BAMzG						BAMzG			BASG			BAFG
Sample	EY-26	EY- 23	MV-79	JK-02	EY- 52	EY- 79	FH-13	MV-119	MV-122	JK-39	MV-131B	CE-264	FH- 04	MV-117
Major elements (wt.%)
SiO₂	71.12	71.20	73.50	74.39	75.57	EY- 79	FH-13	MV-119	MV-122	JK-39	MV-131B	CE-264	FH- 04	MV-117	77.21	70.42	72.84	77.00	72.66	72.78	73.51	73.88	74.47
TiO₂	0.23	0.28	0.14	0.19	0.19	0.07	0.37	0.21	0.26	0.17	0.37	0.23	0.09	0.16
Al₂O₃	16.04	16.77	12.63	12.45	13.17	12.39	13.51	13.96	14.57	12.69	15.21	12.13	14.01	13.27
Fe₂O₃	3.08	3.32	1.92	2.41	2.52	1.64	2.72	1.85	1.81	1.62	3.04	1.93	1.38	1.70
MnO	0.10	0.12	0.06	0.06	0.04	0.02	0.06	0.05	0.06	0.05	0.11	0.05	-	0.02
MgO	0.28	0.53	0.16	0.19	0.12	0.03	0.47	0.22	0.25	0.07	0.33	0.18	0.01	0.10
CaO	1.02	1.84	0.70	0.69	0.50	0.28	1.19	0.78	0.58	0.18	0.98	0.43	0.08	0.53
Na₂O	4.77	4.84	3.75	4.00	4.22	4.08	4.12	3.96	4.30	3.71	4.21	3.47	4.79	3.30
K₂O	5.77	4.57	4.82	5.03	4.94	4.59	5.44	4.98	4.85	5.53	5.52	4.47	5.32	5.43
P₂O₅	-	0.05	-	0.03	-	-	0.10	0.03	0.07	0.02	0.07	0.03	0.01	0.02
LOI	0.11	0.17	0.24	0.38	0.19	0.11	0.44	0.22	0.39	0.42	0.34	0.66	0.23	0.18
Total	102.5	103.69	97.93	99.82	101.47	100.43	98.84	99.10	104.14	97.12	102.96	97.09	99.81	99.18
A/CNK^a	1.01	1.03	1.00	0.94	1.00	1.02	0.91	1.05	1.09	1.02	1.04	1.07	1.02	1.08
A/NK^b	1.14	1.30	1.11	1.04	1.07	1.06	1.07	1.17	1.18	1.05	1.18	1.15	1.03	1.17
Fe-index ^c	0.91	0.85	0.92	0.92	0.95	0.98	0.84	0.88	0.87	0.95	0.89	0.91	0.99	0.94
K₂O+Na₂O	10.54	9.41	8.57	9.03	9.16	8.67	9.56	8.94	9.15	9.24	9.73	7.94	10.11	8.73
K₂O/Na₂O	1.21	0.94	1.29	1.26	1.17	1.13	1.32	1.26	1.13	1.49	1.31	1.29	1.11	1.65
(K₂O+Na₂O)/CaO	10.33	5.11	12.24	13.09	18.32	30.96	8.03	11.46	15.78	51.33	9.93	18.47	126.38	16.47
MALI^d	9.52	7.57	7.87	8.34	8.66	8.39	8.37	8.16	8.57	9.06	8.75	7.51	10.03	8.20
Trace elements (ppm)
Rb	272	237	318	255	279	8.39	8.37	8.16	8.57	9.06	8.75	7.51	10.03	8.20	301	331	287	343	289	261	264	382	225
Ba	427	585	257	414	367	48	907	414	409	240	600	373	13	221
Th	22.6	18.2	23.1	24.5	22.7	36.8	19.5	27.9	31.8	22.0	20.7	26.8	32.5	30.5
U	6.60	5.65	8.33	5.07	6.95	15.48	3.83	6.87	6.93	4.63	4.21	6.34	5.52	3.95
Pb	11.9	7.5	18.1	13.6	12.9	16.0	-	-	-	12.9	-	-	-	-
Nb	4.49	5.03	2.23	15.09	2.27	1.80	29.82	20.62	26.01	24.42	16.92	21.01	52.15	9.10
Ta	0.56	0.54	0.12	0.38	0.36	0.38	3.50	2.38	1.67	2.01	0.82	1.35	2.34	0.61
Ga	15.5	15.8	19.2	23.2	17.6	16.3	22.1	15.5	17.9	23.1	16.2	17.6	27.9	14.8
Sr	63.1	163.9	42.9	52.3	37.5	11.0	166.6	87.7	112.2	29.9	83.6	55.4	0.5	65.2
Hf	1.41	1.60	0.39	4.70	0.77	0.46	9.81	5.88	6.14	8.68	10.72	10.10	6.23	4.21
Zr	247	209	137	191	233	140	347	136	160	205	287	233	131	96
Y	44	54	97	68	66	63	37	52	20	43	33	75	19	35
La	55	73	62	74	88	-	-	69	107	74	86	210	-	80
Ce	81	101	73	145	109	-	-	116	133	86	180	269	-	106
Nd	50	64	58	69	78	-	-	48	45	57	67	135	-	68
Sm	9	12	12	14	16	-	-	10	6	10	12	21	-	12
Eu	0.37	0.67	0.49	0.61	0.60	-	-	0.31	0.67	0.50	0.51	1.09	-	0.61
Gd	8	11	14	11	15	-	-	9	5	7	8	20	-	8
Dy	7.36	9.24	15.13	11.19	12.75	-	-	10.52	3.42	6.41	8.50	17.86	-	8.24
Ho	1.32	1.78	3.19	2.19	2.37	-	-	2.07	0.51	1.13	1.40	2.90	-	1.26
Er	4.82	6.28	10.86	6.58	7.02	-	-	7.29	1.88	3.79	5.11	8.53	-	4.34
Yb	5.6	6.4	11.2	7.1	7.1	-	-	7.0	2.3	4.3	4.8	7.8	-	4.1
Lu	0.31	0.32	2.09	0.84	0.45	-	-	0.58	< 0.05	0.68	0.35	0.67	-	0.18
ΣREE	223	285	262	342	336	-	-	281	304	251	372	694	-	293
LREE/HREE	7.15	7.27	3.73	7.87	6.49	-	-	6.76	22.90	10.10	12.17	11.11	-	10.09
(La/Sm)_N	3.68	3.96	3.33	3.27	3.60	-	-	4.28	11.86	4.56	4.69	6.35	-	4.25
(Gd/Yb)_N	1.19	1.34	1.04	1.29	1.76	-	-	1.06	1.61	1.29	1.41	2.08	-	1.65
(La/Yb)_N	6.62	7.68	3.73	7.05	8.41	-	-	6.68	31.49	11.59	12.05	18.24	-	13.11
Eu_N/Eu*^e	0.13	0.18	0.12	0.15	0.12	-	-	0.10	0.40	0.18	0.16	0.16	-	0.19

Unit rock	Maloquinha Intrusive Suite										PIS
Pluton name	Serra Alta granite						Ig. Tabuleiro granite				Ig. Salustiano granite
Facies/Lithotype	ASG			AFG			Syenogranite				MzG		QzMz
Sample	CE-250	CE-237	CE-241	CE-242	CE-253	CE-239	EY-75B	CE-304	EY-70B	EY-57B	MV-116	FH- 18	FH- 17
Major elements (wt.%)
SiO₂	69.07	72.05	75.93	73.76	CE-253	CE-239	EY-75B	CE-304	EY-70B	EY-57B	MV-116	FH- 18	FH- 17	74.43	74.56	72.31	74.78	75.29	75.80	67.05	74.17	76.69
TiO₂	0.35	0.23	0.21	0.22	0.27	0.1	0.21	0.09	0.09	0.22	0.31	0.24	0.23
Al₂O₃	16.83	13.91	13.97	13.29	14.46	11.93	12.90	12.67	12.52	13.47	15.65	12.76	12.83
Fe₂O₃	3.05	2.42	2.21	2.11	1.97	1.22	1.97	1.64	1.33	2.55	2.34	2.10	1.92
MnO	0.08	0.05	0.06	0.03	0.04	0.02	0.06	0.03	0.02	0.07	0.04	0.03	0.03
MgO	0.30	0.17	0.18	0.15	0.18	0.05	0.13	0.09	0.04	0.15	0.70	0.56	0.53
CaO	0.96	0.51	0.60	0.53	0.37	0.15	0.55	0.56	0.30	0.59	2.36	1.95	1.73
Na₂O	4.85	4.32	3.68	4.04	3.87	3.30	3.80	3.68	3.56	3.94	4.04	3.86	3.82
K₂O	6.44	5.91	5.41	5.85	5.51	4.57	5.03	4.73	5.06	5.43	3.58	3.40	3.24
P₂O₅	0.06	-	0.04	0.04	0.04	-	0.01	-	-	-	0.09	0.05	0.06
LOI	0.49	3.22	0.59	0.72	0.71	1.00	0.24	0.31	0.49	0.15	0.32	0.29	0.25
Total	102.48	102.80	102.88	100.74	101.85	96.91	97.21	98.59	98.71	102.38	96.68	99.41	101.33
A/CNK^a	1.01	0.96	1.07	0.95	1.11	1.12	1.02	1.04	1.05	1	1.04	0.94	0.99
A/NK^b	1.13	1.03	1.17	1.02	1.17	1.15	1.10	1.13	1.10	1.09	1.45	1.27	1.31
Fe-index ^c	0.90	0.93	0.92	0.93	0.91	0.96	0.93	0.94	0.97	0.94	0.75	0.77	0.77
K₂O+Na₂O	11.29	10.23	9.09	9.89	9.38	7.87	8.83	8.41	8.62	9.37	7.82	7.26	7.06
K₂O/Na₂O	1.33	1.37	1.47	1.45	1.42	1.38	1.32	1.29	1.42	1.38	0.89	0.88	0.85
(K₂O+Na₂O)/CaO	11.76	20.06	15.15	18.66	25.35	52.47	16.05	15.02	28.73	15.88	3.31	3.72	4.08
MALI^d	10.33	9.72	8.49	9.36	9.01	7.72	8.28	7.85	8.32	8.78	5.26	5.31	5.33
Trace elements (ppm)
Rb	261	331	372	358	9.01	7.72	8.28	7.85	8.32	8.78	5.26	5.31	5.33	262	457	235	336	290	248	165.6	209.8	248.8
Ba	675	395	441	477	459	66	571	62	89	540	1475	1345	1501
Th	18.9	23.2	28.7	25.7	21.8	29.9	14.9	25.5	19.1	32.7	12.3	11.6	14.5
U	3.94	7.10	7.86	5.59	4.59	6.10	4.18	13.23	7.99	9.98	1.36	1.81	1.98
Pb	-	-	-	-	-	-	13	16.9	11.5	19.1	-	-	-
Nb	15.83	20.74	21.28	16.89	22.85	23.75	13.59	17.47	17.42	2.11	5.15	8.04	6.53
Ta	0.65	1.92	1.81	1.11	1.30	2.12	<0,05	22.81	<0,05	0.35	<0,05	0.94	0.75
Ga	16.3	16.5	16.7	16	16.8	17.9	17.6	18.7	18.5	16	16.5	15.7	16.2
Sr	104.8	62.7	76.2	81.2	64	17.3	43.5	18.7	19.1	45.3	702.4	660.4	675.1
Hf	9.95	7.76	8.09	7.46	9.11	7.65	6.51	2.18	5.65	0.86	3.77	3.94	5.17
Zr	341	216	205	233	282	138	271	142	158	298	115	110	152
Y	40	47	48	43	175	48	50	89	68	56	8	8	14
La	95	107	115	98	-	56	74	59	59	84	36	40	62
Ce	178	182	176	147	-	93	100	64	72	134	63	67	113
Nd	77	70	84	67	-	41	56	54	43	73	25	25	47
Sm	12	10	14	11	-	8	11	11	9	13	4	4	7
Eu	0.49	0.33	0.32	0.28	-	< 0,05	0.99	0.20	0.26	0.74	0.10	< 0,05	0.43
Gd	11	8	10	9	-	7	9	11	8	12	2	2	4
Dy	11.15	8.58	11.48	9.07	-	8.60	8.12	12.44	8.39	10.36	1.34	1.36	2.57
Ho	1.78	1.54	1.90	1.54	-	1.75	1.61	2.63	1.56	1.79	0.06	0.13	0.32
Er	5.95	4.85	6.02	5.03	-	6.31	4.97	8.72	5.46	5.82	0.78	0.79	1.30
Yb	5.7	5.7	6.5	5.6	-	7.7	4.9	10.5	6.5	6.5	0.7	0.8	1.3
Lu	0.41	0.43	0.43	0.46	-	0.68	0.69	1.49	1.04	0.42	< 0,05	< 0,05	< 0,05
ΣREE	399	400	425	353	-	230	272	235	215	342	133	141	239
LREE/HREE	10.09	12.78	10.85	10.80	-	6.28	8.32	4.14	6.13	8.40	25.54	25.22	23.10
(La/Sm)_N	5	6.64	5.20	5.55	-	4.56	4.22	3.38	4.04	4.12	6.38	7.23	5.47
(Gd/Yb)_N	1.60	1.17	1.23	1.25	-	0.75	1.55	0.85	1	1.47	2.45	2.33	2.74
(La/Yb)_N	11.28	12.73	11.92	11.79	-	4.94	10.24	3.79	6.13	8.77	35.16	33.90	31.99
Eu_N/Eu*^e	0.13	0.11	0.08	0.09	-	0.02	0.30	0.06	0.09	0.18	0.11	0.05	0.24

Sample	Lat.	Long.	Sm (ppm)	Nd (ppm)	¹⁴⁷Sm/ ¹⁴⁴Nd	¹⁴³Nd/ ¹⁴⁴Nd	2σ (10^-6)	f _(Sm/Nd)	ε_Nd(0)	Zircon age (Ma)	ε_Nd(t)	T_DM (Ga)
Dalpaiz granite (MIS)
EY-23	-6.04199	-55.77737	8.28	47.05	¹⁴⁷Sm/ ¹⁴⁴Nd	¹⁴³Nd/ ¹⁴⁴Nd	2σ (10^-6)	f _(Sm/Nd)	ε_Nd(0)	Zircon age (Ma)	ε_Nd(t)	T_DM (Ga)	0.106391	0.511482	5	-0.4591	-22.55	1880¹	-0.76	2.22
EY-26	-6.04923	-55.70790	7.35	35.84	0.123905	0.511632	12	-0.3701	-19.62	1880¹	-2.07	2.41
Mamoal granite (MIS)
FH-10	-6.15499	-55.95954	3.84	19.56	0.123905	0.511632	12	-0.3701	-19.62	1880¹	-2.07	2.41	0.118696	0.511574	10	-0.3966	-20.76	1880¹	-1.94	2.37
JK-39	-6.20465	-55.91682	6.98	36.68	0.115106	0.511373	10	-0.4148	-24.68	1880¹	-5.01	2.6
JK-40	-6.16689	-55.92991	5.99	38.28	0.094646	0.511330	6	-0.5188	-25.52	1880¹	-0.89	2.2
Serra Alta granite (MIS)
CE-250	-6.10300	-56.19628	13.56	75.98	0.094646	0.511330	6	-0.5188	-25.52	1880¹	-0.89	2.2	0.107935	0.511346	9	-0.4513	-25.2	1880¹	-3.8	2.46
CE-252	-6.08756	-56.21936	28.20	158.25	0.107748	0.511341	5	-0.4522	-25.3	1880¹	-3.85	2.46
Igarapé Salustiano granite (PIS)
FH-18	-6.00688	-56.05358	1.37	10.21	0.107748	0.511341	5	-0.4522	-25.3	1880¹	-3.85	2.46	0.081017	0.511084	9	-0.5881	-30.31	1891²	-2.26	2.26

[1] *Corresponding author

Brasil

Brasil

Petrografia, geoquímica e isótopos Sm-Nd de granitos do leste do Domínio Tapajós, estado do Pará

RESUMO: