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Related Experiment Video

Updated: Jul 12, 2026

Atom Probe Tomography Analysis of Exsolved Mineral Phases

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Computed tomographic analysis of meteorite inclusions.

J R Arnold, J P Testa, P J Friedman

Science (New York, N.Y.)

|January 28, 1983

Summary

Computed tomography non-destructively probes the Allende meteorite's interior, revealing high and low atomic number regions. This allows targeted analysis of calcium- and aluminum-rich inclusions, advancing solar system origin studies.

Area of Science:

Cosmochemistry
Planetary Science
Geophysics

Background:

Isotopic anomalies in calcium- and aluminum-rich inclusions (CAIs) of the Allende meteorite offer insights into solar system origins.
Previous studies were limited by the destructive nature of meteorite sample retrieval.
A need existed for non-destructive methods to analyze heterogeneous meteorite interiors.

Purpose of the Study:

To develop and apply a non-destructive method for analyzing the interior of the Allende meteorite.
To identify and isolate specific regions of interest within the meteorite for further isotopic analysis.
To overcome limitations of previous destructive sampling techniques.

Main Methods:

Utilized a fourth-generation computed tomographic (CT) scanner with software modifications.

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Applied CT scanning to nondestructively probe the heterogeneous interior of the Allende meteorite.

Developed image processing to differentiate regions based on atomic number.

Main Results:

Successfully visualized the interior structure of the Allende meteorite.
Distinguished regions with high and low atomic numbers rapidly.
Demonstrated the capability to precisely target and isolate specific inclusions for analysis.

Conclusions:

Computed tomography provides an effective non-destructive means to study meteorite interiors.
This technique facilitates the targeted retrieval of scientifically valuable samples, such as CAIs.
Advancements in CT scanning enhance the study of solar system formation and evolution.