Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations
The assessment of detrital zircon age records is a key method in basin analysis, but it is prone to several biases that may compromise accurate sedimentary provenance investigations. High to ultrahigh temperature (HT-UHT) metamorphism (especially if T > 850 °C) is herein presented as a natural ca...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Geoscience Frontiers |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987122001682 |
| _version_ | 1797703222506291200 |
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| author | Mahyra Tedeschi Pedro Leonardo Rossi Vieira Matheus Kuchenbecker Bruno V. Ribeiro Vitor Barrote Humberto Reis Laura Stutenbecker Cristiano Lana Antonio Pedrosa-Soares Ivo Dussin |
| author_facet | Mahyra Tedeschi Pedro Leonardo Rossi Vieira Matheus Kuchenbecker Bruno V. Ribeiro Vitor Barrote Humberto Reis Laura Stutenbecker Cristiano Lana Antonio Pedrosa-Soares Ivo Dussin |
| author_sort | Mahyra Tedeschi |
| collection | DOAJ |
| description | The assessment of detrital zircon age records is a key method in basin analysis, but it is prone to several biases that may compromise accurate sedimentary provenance investigations. High to ultrahigh temperature (HT-UHT) metamorphism (especially if T > 850 °C) is herein presented as a natural cause of bias in provenance studies based on U-Pb detrital zircon ages, since zircon from rocks submitted to these extreme and often prolonged conditions frequently yield protracted, apparently concordant, geochronological records. Such age spreading can result from disturbance of the primary U-Pb zircon system, likewise from (re)crystallization processes during multiple and/or prolonged metamorphic events. In this contribution, available geochronological data on Archean, Neoproterozoic and Palaeozoic HT-UHT metamorphic rocks, acquired by different techniques (SIMS and LA-ICP-MS) and showing distinct compositions, are reassessed to demonstrate HT-UHT metamorphism may result in modes and age distributions of unclear geological meaning. As a consequence, it may induce misinterpretations on U-Pb detrital zircon provenance analyses, particularly in sedimentary rocks metamorphosed under such extreme temperature conditions. To evaluate the presence of HT-UHT metamorphism-related bias in the detrital zircon record, we suggest a workflow for data acquisition and interpretation, combining a multi-proxy approach with: (i) in situ U-Pb dating coupled with Hf analyses to retrieve the isotopic composition of the sources, and (ii) the integration of a petrochronological investigation to typify fingerprints of the HT-UHT metamorphic event. The proposed workflow is validated in the investigation of one theoretical and one natural example allowing a better characterization of the sedimentary sources, maximum depositional ages, and the tectonic setting of the basin. Our workflow allows to the appraisal of biases imposed by HT-UHT metamorphism and resulting disturbances in the U-Pb detrital zircon record, particularly for sedimentary rocks that underwent HT-UHT metamorphism and, finally, suggests ways to overcome these issues. |
| first_indexed | 2024-03-12T05:01:27Z |
| format | Article |
| id | doaj.art-1180d9f0881e47069e649a59095c860b |
| institution | Directory Open Access Journal |
| issn | 1674-9871 |
| language | English |
| last_indexed | 2024-03-12T05:01:27Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Geoscience Frontiers |
| spelling | doaj.art-1180d9f0881e47069e649a59095c860b2023-09-03T09:09:50ZengElsevierGeoscience Frontiers1674-98712023-03-01142101515Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigationsMahyra Tedeschi0Pedro Leonardo Rossi Vieira1Matheus Kuchenbecker2Bruno V. Ribeiro3Vitor Barrote4Humberto Reis5Laura Stutenbecker6Cristiano Lana7Antonio Pedrosa-Soares8Ivo Dussin9Programa de Pós-graduação em Geologia da Universidade Federal de Minerais, Centro de Pesquisas Manoel Teixeira da Costa, Institute of Geosciences, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte 31270-901, Brazil; Institute of Geological Sciences, University of Bern, 3012 Bern, Switzerland; Corresponding author at: Programa de Pós-graduação em Geologia da Universidade Federal de Minerais, Centro de Pesquisas Manoel Teixeira da Costa, Institute of Geosciences, Federal University of Minas Gerais, Brazil.Programa de Pós-graduação em Geologia da Universidade Federal de Minerais, Centro de Pesquisas Manoel Teixeira da Costa, Institute of Geosciences, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte 31270-901, BrazilLaboratório de Estudos Tectônicos, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Rodovia MGT 367, Km 583–Diamantina 39100-000, BrazilSchool of Earth, Atmosphere and Environment, Monash University, Clayton, Victoria 3800, Australia; Timescales of Mineral Systems Group, School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, AustraliaFreie Universität Berlin, Institut für Geologische Wissenschaften, Geochemie, Malteserstr. 10 74-100, 12249 Berlin, GermanyDepartamento de Geologia-Escola de Minas, Universidade Federal de Ouro Preto 35400-000, BrazilDepartment of Materials and Earth Sciences, Institute of Applied Geosciences, TU Darmstadt, Schnittspahnstr. 9, 64287 Darmstadt, GermanyDepartamento de Geologia-Escola de Minas, Universidade Federal de Ouro Preto 35400-000, BrazilPrograma de Pós-graduação em Geologia da Universidade Federal de Minerais, Centro de Pesquisas Manoel Teixeira da Costa, Institute of Geosciences, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte 31270-901, BrazilTEKTOS Geotectonic Research Group, Geology Institute, Rio de Janeiro State University, São Francisco Xavier Street, 524/4030-A, Maracanã, Rio de Janeiro 20550-900, BrazilThe assessment of detrital zircon age records is a key method in basin analysis, but it is prone to several biases that may compromise accurate sedimentary provenance investigations. High to ultrahigh temperature (HT-UHT) metamorphism (especially if T > 850 °C) is herein presented as a natural cause of bias in provenance studies based on U-Pb detrital zircon ages, since zircon from rocks submitted to these extreme and often prolonged conditions frequently yield protracted, apparently concordant, geochronological records. Such age spreading can result from disturbance of the primary U-Pb zircon system, likewise from (re)crystallization processes during multiple and/or prolonged metamorphic events. In this contribution, available geochronological data on Archean, Neoproterozoic and Palaeozoic HT-UHT metamorphic rocks, acquired by different techniques (SIMS and LA-ICP-MS) and showing distinct compositions, are reassessed to demonstrate HT-UHT metamorphism may result in modes and age distributions of unclear geological meaning. As a consequence, it may induce misinterpretations on U-Pb detrital zircon provenance analyses, particularly in sedimentary rocks metamorphosed under such extreme temperature conditions. To evaluate the presence of HT-UHT metamorphism-related bias in the detrital zircon record, we suggest a workflow for data acquisition and interpretation, combining a multi-proxy approach with: (i) in situ U-Pb dating coupled with Hf analyses to retrieve the isotopic composition of the sources, and (ii) the integration of a petrochronological investigation to typify fingerprints of the HT-UHT metamorphic event. The proposed workflow is validated in the investigation of one theoretical and one natural example allowing a better characterization of the sedimentary sources, maximum depositional ages, and the tectonic setting of the basin. Our workflow allows to the appraisal of biases imposed by HT-UHT metamorphism and resulting disturbances in the U-Pb detrital zircon record, particularly for sedimentary rocks that underwent HT-UHT metamorphism and, finally, suggests ways to overcome these issues.http://www.sciencedirect.com/science/article/pii/S1674987122001682Detrital zirconProtracted zircon recordSedimentary basinsUHT metamorphismProlonged metamorphismBias in detrital zircon |
| spellingShingle | Mahyra Tedeschi Pedro Leonardo Rossi Vieira Matheus Kuchenbecker Bruno V. Ribeiro Vitor Barrote Humberto Reis Laura Stutenbecker Cristiano Lana Antonio Pedrosa-Soares Ivo Dussin Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations Geoscience Frontiers Detrital zircon Protracted zircon record Sedimentary basins UHT metamorphism Prolonged metamorphism Bias in detrital zircon |
| title | Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations |
| title_full | Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations |
| title_fullStr | Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations |
| title_full_unstemmed | Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations |
| title_short | Unravelling the protracted U-Pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks: Implications for provenance investigations |
| title_sort | unravelling the protracted u pb zircon geochronological record of high to ultrahigh temperature metamorphic rocks implications for provenance investigations |
| topic | Detrital zircon Protracted zircon record Sedimentary basins UHT metamorphism Prolonged metamorphism Bias in detrital zircon |
| url | http://www.sciencedirect.com/science/article/pii/S1674987122001682 |
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