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Related Experiment Videos

Fluid inclusions in stony meteorites--a cautionary note.

R L Rudnick1, L D Ashwal, D J Henry

  • 1Lunar and Planetary Institute, USA.

Journal of Geophysical Research
|February 15, 1985
PubMed
Summary

Many fluid inclusions in meteorites may be preparation artifacts, not extraterrestrial. True inclusions are likely found only in samples prepared without liquids, requiring cautious interpretation of meteorite fluid inclusion origins.

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Area of Science:

  • Geochemistry
  • Planetary Science
  • Materials Science

Background:

  • Fluid inclusions in extraterrestrial materials are studied for insights into planetary formation and evolution.
  • Previous studies have reported fluid inclusions in various meteorites, suggesting potential for trapped volatiles.

Purpose of the Study:

  • To investigate the origin and nature of newly discovered fluid inclusions in chondrules and meteorites.
  • To determine if these inclusions represent genuine extraterrestrial volatiles or preparation artifacts.

Main Methods:

  • Microscopic examination of thin sections from Bjurbole chondrules, shergottite EETA79001, lunar meteorite ALHA81005, and Apollo 16 glasses.
  • Comparison of physical properties and distribution of newly found inclusions with previously reported inclusions.

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Main Results:

  • Newly discovered fluid inclusions exhibit properties similar to those previously described in meteorites.
  • The distribution and characteristics suggest these inclusions are likely artifacts introduced during thin section preparation, possibly from saw coolant.
  • Similarities with prior findings indicate many previously reported inclusions may also be artifacts.

Conclusions:

  • The origin of fluid inclusions in extraterrestrial thin sections must be interpreted with caution.
  • True extraterrestrial fluid inclusions are most reliably identified in samples prepared without liquid exposure.