View in EDS PDF Full Text

Ancient Asteroids Enriched in Refractory Inclusions.

Saved in:
Bibliographic Details
Title: Ancient Asteroids Enriched in Refractory Inclusions.
Authors: Sunshine, J. M., ConnolLy Jr., H. C., McCoy, T. J., Bus, S. J., La Croix, L. M.
Source: Science (pre-March 2025). 4/25/2008, Vol. 320 Issue 5875, p514-517. 4p. 1 Diagram, 1 Chart, 4 Graphs.
Subjects: Metal inclusions, Calcium, Aluminum, Chondrites, Chondrules, Minerals, Iron oxides, Solar system, Infrared spectra, Spectrum analysis
Abstract: Calcium- and aluminum-rich inclusions (CAIs) occur in all classes of chondritic meteorites and contain refractory minerals predicted to be the first condensates from the solar nebula. Near-infrared spectra of CAIs have strong 2-micrometer absorptions, attributed to iron oxide-bearing aluminous spinel. Similar absorptions are present in the telescopic spectra of several asteroids; modeling indicates that these contain -30 ± 100/0 CAIs (two to three times that of any meteorite). Survival of these undifferentiated, large (50- to 100-kilometer diameter) CAl-rich bodies suggests that they may have formed before the injection of radiogenic 26Al into the solar system. They have also experienced only modest post-accretionary alteration. Thus, these asteroids have higher concentrations of CAl material, appear less altered, and are more ancient than any known sample in our meteorite collection, making them prime candidates for sample return. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science 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: Psychology and Behavioral Sciences Collection
FullText Links:
  – Type: pdflink
Text:
  Availability: 0
Header DbId: pbh
DbLabel: Psychology and Behavioral Sciences Collection
An: 31991428
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Ancient Asteroids Enriched in Refractory Inclusions.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Sunshine%2C+J%2E+M%2E%22">Sunshine, J. M.</searchLink><br /><searchLink fieldCode="AR" term="%22ConnolLy+Jr%2E%2C+H%2E+C%2E%22">ConnolLy Jr., H. C.</searchLink><br /><searchLink fieldCode="AR" term="%22McCoy%2C+T%2E+J%2E%22">McCoy, T. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Bus%2C+S%2E+J%2E%22">Bus, S. J.</searchLink><br /><searchLink fieldCode="AR" term="%22La+Croix%2C+L%2E+M%2E%22">La Croix, L. M.</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 4/25/2008, Vol. 320 Issue 5875, p514-517. 4p. 1 Diagram, 1 Chart, 4 Graphs.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Metal+inclusions%22">Metal inclusions</searchLink><br /><searchLink fieldCode="DE" term="%22Calcium%22">Calcium</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum%22">Aluminum</searchLink><br /><searchLink fieldCode="DE" term="%22Chondrites%22">Chondrites</searchLink><br /><searchLink fieldCode="DE" term="%22Chondrules%22">Chondrules</searchLink><br /><searchLink fieldCode="DE" term="%22Minerals%22">Minerals</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+oxides%22">Iron oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+system%22">Solar system</searchLink><br /><searchLink fieldCode="DE" term="%22Infrared+spectra%22">Infrared spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Calcium- and aluminum-rich inclusions (CAIs) occur in all classes of chondritic meteorites and contain refractory minerals predicted to be the first condensates from the solar nebula. Near-infrared spectra of CAIs have strong 2-micrometer absorptions, attributed to iron oxide-bearing aluminous spinel. Similar absorptions are present in the telescopic spectra of several asteroids; modeling indicates that these contain -30 ± 100/0 CAIs (two to three times that of any meteorite). Survival of these undifferentiated, large (50- to 100-kilometer diameter) CAl-rich bodies suggests that they may have formed before the injection of radiogenic 26Al into the solar system. They have also experienced only modest post-accretionary alteration. Thus, these asteroids have higher concentrations of CAl material, appear less altered, and are more ancient than any known sample in our meteorite collection, making them prime candidates for sample return. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science 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=pbh&AN=31991428
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1126/science.1154340
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 4
        StartPage: 514
    Subjects:
      – SubjectFull: Metal inclusions
        Type: general
      – SubjectFull: Calcium
        Type: general
      – SubjectFull: Aluminum
        Type: general
      – SubjectFull: Chondrites
        Type: general
      – SubjectFull: Chondrules
        Type: general
      – SubjectFull: Minerals
        Type: general
      – SubjectFull: Iron oxides
        Type: general
      – SubjectFull: Solar system
        Type: general
      – SubjectFull: Infrared spectra
        Type: general
      – SubjectFull: Spectrum analysis
        Type: general
    Titles:
      – TitleFull: Ancient Asteroids Enriched in Refractory Inclusions.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Sunshine, J. M.
      – PersonEntity:
          Name:
            NameFull: ConnolLy Jr., H. C.
      – PersonEntity:
          Name:
            NameFull: McCoy, T. J.
      – PersonEntity:
          Name:
            NameFull: Bus, S. J.
      – PersonEntity:
          Name:
            NameFull: La Croix, L. M.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 25
              M: 04
              Text: 4/25/2008
              Type: published
              Y: 2008
          Identifiers:
            – Type: issn-print
              Value: 00368075
          Numbering:
            – Type: volume
              Value: 320
            – Type: issue
              Value: 5875
          Titles:
            – TitleFull: Science (pre-March 2025)
              Type: main
ResultId 1