View in EDS

U-Pb Ages and Hf Isotopes in Zircons from Parautochthonous Mesozoic Terranes in the Western Margin of Pangea: Implications for the Terrane Configurations in the Northern Andes.

Saved in:
Bibliographic Details
Title: U-Pb Ages and Hf Isotopes in Zircons from Parautochthonous Mesozoic Terranes in the Western Margin of Pangea: Implications for the Terrane Configurations in the Northern Andes.
Authors: Bustamante, Camilo1,2,3 cbustam3@eafit.edu.co, Archanjo, Carlos J.1, Cardona, Agustín4, Bustamante, Andres5, Valencia, Victor A.6
Source: Journal of Geology. Sep2017, Vol. 125 Issue 5, p487-500. 14p.
Subjects: Uranium-lead dating, Laser ablation, Zircon, Hafnium isotopes, Pangaea (Supercontinent)
Geographic Terms: Cordillera Central (Peru)
Abstract: U-Pb laser ablation inductively coupled plasma mass spectrometry ages and Hf isotopes in zircons were used to constrain the nature of two geological units representative of the basement of the Central Cordillera of Colombia. Graphite-quartz-muscovite schists from the Cajamarca Complex show inherited detrital zircons supplied mostly from Late Jurassic (ca. 167 Ma), Ediacaran (ca. 638 Ma), and Tonian (Grenvillian; ca. 1000 Ma) sources. These marine volcanosedimentary deposits form an N-trending metamorphic belt in fault contact to the east with orthogneisses and amphibolites of the Tierradentro unit. Zircon U-Pb determinations of the Tierradentro rocks--previously interpreted as Grenvillian basement slices--yielded crystallization ages between 271 and 234 Ma. Initial Hf data reveal that the Tierradentro unit shares isotopic characteristics similar to other Permo-Triassic rocks of the Central Cordillera. In contrast, inherited detrital zircons from the Jurassic metasedimentary rocks suggest that their sources are distinct from the plutonic rocks that crop out in the Central Cordillera with Jurassic crystallization ages. Large xenoliths of the Tierradentro unit within the Ibagué batholith indicate that the granodioritic magma mostly intruded a Permo-Triassic basement possibly by exploiting the Otú-Pericos fault. The Jurassic metasedimentary belt is correlated further south with a similar sequence in the Ecuadorian Andes named Salado terrane. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geology is the property of University of Chicago Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 124826821
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: U-Pb Ages and Hf Isotopes in Zircons from Parautochthonous Mesozoic Terranes in the Western Margin of Pangea: Implications for the Terrane Configurations in the Northern Andes.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Bustamante%2C+Camilo%22">Bustamante, Camilo</searchLink><relatesTo>1,2,3</relatesTo><i> cbustam3@eafit.edu.co</i><br /><searchLink fieldCode="AR" term="%22Archanjo%2C+Carlos+J%2E%22">Archanjo, Carlos J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cardona%2C+Agustín%22">Cardona, Agustín</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Bustamante%2C+Andres%22">Bustamante, Andres</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Valencia%2C+Victor+A%2E%22">Valencia, Victor A.</searchLink><relatesTo>6</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geology%22">Journal of Geology</searchLink>. Sep2017, Vol. 125 Issue 5, p487-500. 14p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Uranium-lead+dating%22">Uranium-lead dating</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+ablation%22">Laser ablation</searchLink><br /><searchLink fieldCode="DE" term="%22Zircon%22">Zircon</searchLink><br /><searchLink fieldCode="DE" term="%22Hafnium+isotopes%22">Hafnium isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Pangaea+%28Supercontinent%29%22">Pangaea (Supercontinent)</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Cordillera+Central+%28Peru%29%22">Cordillera Central (Peru)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: U-Pb laser ablation inductively coupled plasma mass spectrometry ages and Hf isotopes in zircons were used to constrain the nature of two geological units representative of the basement of the Central Cordillera of Colombia. Graphite-quartz-muscovite schists from the Cajamarca Complex show inherited detrital zircons supplied mostly from Late Jurassic (ca. 167 Ma), Ediacaran (ca. 638 Ma), and Tonian (Grenvillian; ca. 1000 Ma) sources. These marine volcanosedimentary deposits form an N-trending metamorphic belt in fault contact to the east with orthogneisses and amphibolites of the Tierradentro unit. Zircon U-Pb determinations of the Tierradentro rocks--previously interpreted as Grenvillian basement slices--yielded crystallization ages between 271 and 234 Ma. Initial Hf data reveal that the Tierradentro unit shares isotopic characteristics similar to other Permo-Triassic rocks of the Central Cordillera. In contrast, inherited detrital zircons from the Jurassic metasedimentary rocks suggest that their sources are distinct from the plutonic rocks that crop out in the Central Cordillera with Jurassic crystallization ages. Large xenoliths of the Tierradentro unit within the Ibagué batholith indicate that the granodioritic magma mostly intruded a Permo-Triassic basement possibly by exploiting the Otú-Pericos fault. The Jurassic metasedimentary belt is correlated further south with a similar sequence in the Ecuadorian Andes named Salado terrane. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Geology is the property of University of Chicago Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=124826821
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1086/693014
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 487
    Subjects:
      – SubjectFull: Uranium-lead dating
        Type: general
      – SubjectFull: Laser ablation
        Type: general
      – SubjectFull: Zircon
        Type: general
      – SubjectFull: Hafnium isotopes
        Type: general
      – SubjectFull: Pangaea (Supercontinent)
        Type: general
      – SubjectFull: Cordillera Central (Peru)
        Type: general
    Titles:
      – TitleFull: U-Pb Ages and Hf Isotopes in Zircons from Parautochthonous Mesozoic Terranes in the Western Margin of Pangea: Implications for the Terrane Configurations in the Northern Andes.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Bustamante, Camilo
      – PersonEntity:
          Name:
            NameFull: Archanjo, Carlos J.
      – PersonEntity:
          Name:
            NameFull: Cardona, Agustín
      – PersonEntity:
          Name:
            NameFull: Bustamante, Andres
      – PersonEntity:
          Name:
            NameFull: Valencia, Victor A.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 09
              Text: Sep2017
              Type: published
              Y: 2017
          Identifiers:
            – Type: issn-print
              Value: 00221376
          Numbering:
            – Type: volume
              Value: 125
            – Type: issue
              Value: 5
          Titles:
            – TitleFull: Journal of Geology
              Type: main
ResultId 1