Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids.
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/13162 https://doi.org/10.1016/j.gsf.2020.01.017 |
Resumo: | New, integrated petrographic, mineral chemistry, whole rock geochemical, zircon and titanite U–Pb geochronology, and zircon Hf isotopic data from the Montezuma granitoids, as well as new geochemical results for its host rocks represented by the Corrego Tingui Complex, provides new insights into the late- to post-collisional evolution of the northeastern S~ao Francisco paleocontinent. U–Pb zircon dates from the Montezuma granitoids spread along the Concordia between ca. 2.2 Ga to 1.8 Ga and comprise distinct groups. Group I have crystallization ages between ca. 2.15 Ga and 2.05 Ga and are interpreted as inherited grains. Group II zircon dates vary from 2.04 Ga to 1.9 Ga and corresponds to the crystallization of the Montezuma granitoids, which were constrained at ca. 2.03 Ga by the titanite U–Pb age. Inverse age zoning is common within the ca. 1.8 Ga Group III zircon ages, being related to fluid isotopic re-setting during the Espinhaco rifiting event. Zircon εHf(t) analysis show dominantly positive values for both Group I ( 4 to þ9) and II ( 3 to þ8) zircons and TDM2 model ages of 2.7–2.1 Ga and 2.5–1.95 Ga, respectively. Geochemically, the Montezuma granitoids are weakly peraluminous to metaluminous magnesian granitoids, enriched in LILES and LREE, with high to moderate Mg# and depleted in some of the HFSE. Their lithochemical signature, added to the juvenile signature of both inherited and crystallized zircons, allowed its classification as a shoshonitic high Ba–Sr granitoid related to a late- to post-collisional lithosphere delamination followed by asthenospheric upwelling. In this scenario, the partial melting of the lithospheric mantle interacted with the roots of an accreted juvenile intra-oceanic arc, being these hybrid magma interpreted as the source of the Montezuma granitoids. The Corrego Tinguí Complex host rocks are akin to a syn- to late-collisional volcanic arc granitoids originated from the partial melting of ancient crustal rocks. The results presented in this study have revealed the occurrence of juvenile rocks, probably related to an island arc environment, that are exotic in relation to the Paleo- to Neoarchean crust from the S~ao Francisco paleocontinent’s core. |
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Bersan, Samuel MoreiraCosta, Alice Fernanda de OliveiraDanderfer Filho, AndréAbreu, Francisco Robério deLana, Cristiano de CarvalhoQueiroga, Gláucia NascimentoStorey, Craig DarrylMoreira, Hugo Souza2021-03-23T08:34:18Z2021-03-23T08:34:18Z2020BERSAN, S. M. et al. Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. Geoscience Frontiers, v. 11, n. 5, p. 1821-1840, set. 2020. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1674987120300414>. Acesso em: 19 fev 2021.1674-9871http://www.repositorio.ufop.br/handle/123456789/13162https://doi.org/10.1016/j.gsf.2020.01.017New, integrated petrographic, mineral chemistry, whole rock geochemical, zircon and titanite U–Pb geochronology, and zircon Hf isotopic data from the Montezuma granitoids, as well as new geochemical results for its host rocks represented by the Corrego Tingui Complex, provides new insights into the late- to post-collisional evolution of the northeastern S~ao Francisco paleocontinent. U–Pb zircon dates from the Montezuma granitoids spread along the Concordia between ca. 2.2 Ga to 1.8 Ga and comprise distinct groups. Group I have crystallization ages between ca. 2.15 Ga and 2.05 Ga and are interpreted as inherited grains. Group II zircon dates vary from 2.04 Ga to 1.9 Ga and corresponds to the crystallization of the Montezuma granitoids, which were constrained at ca. 2.03 Ga by the titanite U–Pb age. Inverse age zoning is common within the ca. 1.8 Ga Group III zircon ages, being related to fluid isotopic re-setting during the Espinhaco rifiting event. Zircon εHf(t) analysis show dominantly positive values for both Group I ( 4 to þ9) and II ( 3 to þ8) zircons and TDM2 model ages of 2.7–2.1 Ga and 2.5–1.95 Ga, respectively. Geochemically, the Montezuma granitoids are weakly peraluminous to metaluminous magnesian granitoids, enriched in LILES and LREE, with high to moderate Mg# and depleted in some of the HFSE. Their lithochemical signature, added to the juvenile signature of both inherited and crystallized zircons, allowed its classification as a shoshonitic high Ba–Sr granitoid related to a late- to post-collisional lithosphere delamination followed by asthenospheric upwelling. In this scenario, the partial melting of the lithospheric mantle interacted with the roots of an accreted juvenile intra-oceanic arc, being these hybrid magma interpreted as the source of the Montezuma granitoids. The Corrego Tinguí Complex host rocks are akin to a syn- to late-collisional volcanic arc granitoids originated from the partial melting of ancient crustal rocks. The results presented in this study have revealed the occurrence of juvenile rocks, probably related to an island arc environment, that are exotic in relation to the Paleo- to Neoarchean crust from the S~ao Francisco paleocontinent’s core.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Fonte: o próprio artigo.info:eu-repo/semantics/openAccessZircon U–Pb-HfTitanite U–PbLate- to post-collisionalPaleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/13162/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_PaleoproterozoicJuvenileMagmatism.pdfARTIGO_PaleoproterozoicJuvenileMagmatism.pdfapplication/pdf9485476http://www.repositorio.ufop.br/bitstream/123456789/13162/1/ARTIGO_PaleoproterozoicJuvenileMagmatism.pdfb5d686d49d0c5d0680f55eedc05fd465MD51123456789/131622021-03-23 04:34:18.191oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332021-03-23T08:34:18Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
title |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
spellingShingle |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. Bersan, Samuel Moreira Zircon U–Pb-Hf Titanite U–Pb Late- to post-collisional |
title_short |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
title_full |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
title_fullStr |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
title_full_unstemmed |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
title_sort |
Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. |
author |
Bersan, Samuel Moreira |
author_facet |
Bersan, Samuel Moreira Costa, Alice Fernanda de Oliveira Danderfer Filho, André Abreu, Francisco Robério de Lana, Cristiano de Carvalho Queiroga, Gláucia Nascimento Storey, Craig Darryl Moreira, Hugo Souza |
author_role |
author |
author2 |
Costa, Alice Fernanda de Oliveira Danderfer Filho, André Abreu, Francisco Robério de Lana, Cristiano de Carvalho Queiroga, Gláucia Nascimento Storey, Craig Darryl Moreira, Hugo Souza |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Bersan, Samuel Moreira Costa, Alice Fernanda de Oliveira Danderfer Filho, André Abreu, Francisco Robério de Lana, Cristiano de Carvalho Queiroga, Gláucia Nascimento Storey, Craig Darryl Moreira, Hugo Souza |
dc.subject.por.fl_str_mv |
Zircon U–Pb-Hf Titanite U–Pb Late- to post-collisional |
topic |
Zircon U–Pb-Hf Titanite U–Pb Late- to post-collisional |
description |
New, integrated petrographic, mineral chemistry, whole rock geochemical, zircon and titanite U–Pb geochronology, and zircon Hf isotopic data from the Montezuma granitoids, as well as new geochemical results for its host rocks represented by the Corrego Tingui Complex, provides new insights into the late- to post-collisional evolution of the northeastern S~ao Francisco paleocontinent. U–Pb zircon dates from the Montezuma granitoids spread along the Concordia between ca. 2.2 Ga to 1.8 Ga and comprise distinct groups. Group I have crystallization ages between ca. 2.15 Ga and 2.05 Ga and are interpreted as inherited grains. Group II zircon dates vary from 2.04 Ga to 1.9 Ga and corresponds to the crystallization of the Montezuma granitoids, which were constrained at ca. 2.03 Ga by the titanite U–Pb age. Inverse age zoning is common within the ca. 1.8 Ga Group III zircon ages, being related to fluid isotopic re-setting during the Espinhaco rifiting event. Zircon εHf(t) analysis show dominantly positive values for both Group I ( 4 to þ9) and II ( 3 to þ8) zircons and TDM2 model ages of 2.7–2.1 Ga and 2.5–1.95 Ga, respectively. Geochemically, the Montezuma granitoids are weakly peraluminous to metaluminous magnesian granitoids, enriched in LILES and LREE, with high to moderate Mg# and depleted in some of the HFSE. Their lithochemical signature, added to the juvenile signature of both inherited and crystallized zircons, allowed its classification as a shoshonitic high Ba–Sr granitoid related to a late- to post-collisional lithosphere delamination followed by asthenospheric upwelling. In this scenario, the partial melting of the lithospheric mantle interacted with the roots of an accreted juvenile intra-oceanic arc, being these hybrid magma interpreted as the source of the Montezuma granitoids. The Corrego Tinguí Complex host rocks are akin to a syn- to late-collisional volcanic arc granitoids originated from the partial melting of ancient crustal rocks. The results presented in this study have revealed the occurrence of juvenile rocks, probably related to an island arc environment, that are exotic in relation to the Paleo- to Neoarchean crust from the S~ao Francisco paleocontinent’s core. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020 |
dc.date.accessioned.fl_str_mv |
2021-03-23T08:34:18Z |
dc.date.available.fl_str_mv |
2021-03-23T08:34:18Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
BERSAN, S. M. et al. Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. Geoscience Frontiers, v. 11, n. 5, p. 1821-1840, set. 2020. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1674987120300414>. Acesso em: 19 fev 2021. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/13162 |
dc.identifier.issn.none.fl_str_mv |
1674-9871 |
dc.identifier.doi.pt_BR.fl_str_mv |
https://doi.org/10.1016/j.gsf.2020.01.017 |
identifier_str_mv |
BERSAN, S. M. et al. Paleoproterozoic juvenile magmatism within the northeastern sector of the São Francisco paleocontinent : insights from the shoshonitic high Ba–Sr Montezuma granitoids. Geoscience Frontiers, v. 11, n. 5, p. 1821-1840, set. 2020. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1674987120300414>. Acesso em: 19 fev 2021. 1674-9871 |
url |
http://www.repositorio.ufop.br/handle/123456789/13162 https://doi.org/10.1016/j.gsf.2020.01.017 |
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