View in EDS

Molybdenum isotopic heterogeneity for intraplate basalts and its origin.

Saved in:
Bibliographic Details
Title: Molybdenum isotopic heterogeneity for intraplate basalts and its origin.
Authors: Fang, Wei1 (AUTHOR), Dai, Li-Qun1,2 (AUTHOR) lqdai@ustc.edu.cn, Zhao, Zi-Fu1,2 (AUTHOR)
Source: Chemical Geology. Dec2023, Vol. 641, pN.PAG-N.PAG. 1p.
Subjects: Molybdenum, Basalt, Strontium isotopes, Earth's mantle, Volcanic ash, tuff, etc., Molybdenum isotopes, Neodymium isotopes
Abstract: The molybdenum (Mo) isotope system is a powerful tool for tracing recycled crustal components in volcanic rocks. Existing Mo isotope data show that intraplate basalts have highly variable Mo isotopes. However, the heterogeneity of Mo isotopes in intraplate basalts was interpreted to be inherited from recycling of different slab components, and its origin remains unclear. Here we synthesize Mo isotope and other geochemical data for global intraplate basalts, which provide insights into Mo recycling in Earth's deep mantle. Global intraplate basalts display highly variable δ98Mo values of −0.84‰ to 0.10‰, suggesting mantle Mo isotopic heterogeneity. Most of the basalts have low δ98Mo values and high Ce/Mo ratios that are similar to those of the oceanic eclogites, indicating that recycled dehydrated oceanic crustal components were involved in their mantle sources. However, some intraplate basalts have heavy Mo isotopes. This reveals that slab components at shallow depths were dragged by the downgoing slab and have carried heavy Mo isotopes into the deep mantle. Significantly, high δ98Mo values of these basalts are also associated with low Ce/Mo ratios, high fluid-mobile element contents, and depleted radiogenic Sr Nd isotopes. Given that recycled basaltic oceanic crust and sediment are generally efficiently dehydrated during subduction and sequester light Mo isotopes, subducted serpentinised lithospheric mantle is a plausible candidate to transfer heavy Mo isotopes into the deep mantle. Thus, Mo isotope systematics of intraplate basalts record complex geochemical fluxes from subducting slab to the deep mantle, in which subducted serpentinites play an important role in the Mo isotope recycling. Our study highlights the effectiveness of Mo isotopes as indicators for geochemical heterogeneity of Earth's deep mantle. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Geology is the property of Elsevier B.V. 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: 173852603
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Molybdenum isotopic heterogeneity for intraplate basalts and its origin.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Fang%2C+Wei%22">Fang, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dai%2C+Li-Qun%22">Dai, Li-Qun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lqdai@ustc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Zi-Fu%22">Zhao, Zi-Fu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Chemical+Geology%22">Chemical Geology</searchLink>. Dec2023, Vol. 641, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Molybdenum%22">Molybdenum</searchLink><br /><searchLink fieldCode="DE" term="%22Basalt%22">Basalt</searchLink><br /><searchLink fieldCode="DE" term="%22Strontium+isotopes%22">Strontium isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Earth's+mantle%22">Earth's mantle</searchLink><br /><searchLink fieldCode="DE" term="%22Volcanic+ash%2C+tuff%2C+etc%2E%22">Volcanic ash, tuff, etc.</searchLink><br /><searchLink fieldCode="DE" term="%22Molybdenum+isotopes%22">Molybdenum isotopes</searchLink><br /><searchLink fieldCode="DE" term="%22Neodymium+isotopes%22">Neodymium isotopes</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The molybdenum (Mo) isotope system is a powerful tool for tracing recycled crustal components in volcanic rocks. Existing Mo isotope data show that intraplate basalts have highly variable Mo isotopes. However, the heterogeneity of Mo isotopes in intraplate basalts was interpreted to be inherited from recycling of different slab components, and its origin remains unclear. Here we synthesize Mo isotope and other geochemical data for global intraplate basalts, which provide insights into Mo recycling in Earth's deep mantle. Global intraplate basalts display highly variable δ98Mo values of −0.84‰ to 0.10‰, suggesting mantle Mo isotopic heterogeneity. Most of the basalts have low δ98Mo values and high Ce/Mo ratios that are similar to those of the oceanic eclogites, indicating that recycled dehydrated oceanic crustal components were involved in their mantle sources. However, some intraplate basalts have heavy Mo isotopes. This reveals that slab components at shallow depths were dragged by the downgoing slab and have carried heavy Mo isotopes into the deep mantle. Significantly, high δ98Mo values of these basalts are also associated with low Ce/Mo ratios, high fluid-mobile element contents, and depleted radiogenic Sr Nd isotopes. Given that recycled basaltic oceanic crust and sediment are generally efficiently dehydrated during subduction and sequester light Mo isotopes, subducted serpentinised lithospheric mantle is a plausible candidate to transfer heavy Mo isotopes into the deep mantle. Thus, Mo isotope systematics of intraplate basalts record complex geochemical fluxes from subducting slab to the deep mantle, in which subducted serpentinites play an important role in the Mo isotope recycling. Our study highlights the effectiveness of Mo isotopes as indicators for geochemical heterogeneity of Earth's deep mantle. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Geology is the property of Elsevier B.V. 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=173852603
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.chemgeo.2023.121784
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Molybdenum
        Type: general
      – SubjectFull: Basalt
        Type: general
      – SubjectFull: Strontium isotopes
        Type: general
      – SubjectFull: Earth's mantle
        Type: general
      – SubjectFull: Volcanic ash, tuff, etc.
        Type: general
      – SubjectFull: Molybdenum isotopes
        Type: general
      – SubjectFull: Neodymium isotopes
        Type: general
    Titles:
      – TitleFull: Molybdenum isotopic heterogeneity for intraplate basalts and its origin.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Fang, Wei
      – PersonEntity:
          Name:
            NameFull: Dai, Li-Qun
      – PersonEntity:
          Name:
            NameFull: Zhao, Zi-Fu
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 20
              M: 12
              Text: Dec2023
              Type: published
              Y: 2023
          Identifiers:
            – Type: issn-print
              Value: 00092541
          Numbering:
            – Type: volume
              Value: 641
          Titles:
            – TitleFull: Chemical Geology
              Type: main
ResultId 1